WO2021199404A1

WO2021199404A1 - Vehicle-mounted charger

Info

Publication number: WO2021199404A1
Application number: PCT/JP2020/015192
Authority: WO
Inventors: 祐輔邦近; 英彦木下; 勇毅武田
Original assignee: 三菱電機株式会社
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2021-10-07

Abstract

The objective of the present invention is to provide a vehicle-mounted charger with which it is possible to reduce the number of components used to reduce differential mode noise.　A vehicle-mounted charger (3) is provided with a first coil component (311) including a first common mode choke coil (3110) and a first fixed member (3115) provided with a first identification mark (3150) indicating a first winding direction, a second coil component (312) including a second common mode choke coil (3120) and a second fixed member (3125) provided with a second identification mark (3250) indicating a second winding direction, and a base board (51) on which the first coil component (311) and the second coil component (312) are arranged in such a way as to be adjacent to one another, wherein the first coil component (311) and the second coil component (312) are aligned side-by-side on the base board (51) in such a way that the first winding direction and the second winding direction are opposite to one another in the direction in which the first coil component (311) and the second coil component (312) are aligned.

Description

In-vehicle charger

This disclosure relates to an in-vehicle charger for charging a battery for an electric vehicle.

In-vehicle chargers that charge batteries that supply power to electric motors for electric vehicles such as EVs (electric vehicles) and PHEVs (plug-in hybrid electric vehicles) are compared because they switch large currents. Large noise is generated. As described in Patent Document 1, the in-vehicle charger used in an electric vehicle is described in Patent Document 1 in order to suppress such relatively large noise from being transmitted to an external power source such as a general household power source connected to the in-vehicle charger. Common mode choke coil is used.

Japanese Unexamined Patent Publication No. 2010-27655

By the way, in-vehicle chargers used in electric vehicles are required to be miniaturized for the purpose of securing a living space in the electric vehicle. Here, in order to obtain the performance of removing desired noise, it is smaller in volume to connect a plurality of common mode choke coils in series instead of one common mode choke coil. Therefore, in the in-vehicle charger, in order to meet the demand for miniaturization, a plurality of common mode choke coils are connected in series to reduce noise generated in the in-vehicle charger and transmitted to an external power source.

However, the noise generated inside the in-vehicle charger includes not only common mode noise but also differential mode noise. Therefore, in addition to the common mode choke coil, a component for reducing differential mode noise, for example, a ferrite bead is required. However, since the in-vehicle charger is required to be miniaturized, there is a problem that the space for mounting the parts for reducing the noise generated inside the in-vehicle charger is limited.

The present disclosure has been made to solve the above problems, and an object of the present disclosure is to provide an in-vehicle charger capable of reducing the number of parts for reducing differential mode noise.

The vehicle-mounted charger according to one embodiment of the present disclosure is a member to which the first common mode choke coil and the first common mode choke coil are fixed, and the lead wire of the first common mode choke coil is the first. A first coil component having a first fixing member provided with a first identification mark indicating a first winding direction, which is a winding direction around the core of the common mode choke coil, and a first common mode choke coil. A member to which the electrically connected second common mode choke coil and the second common mode choke coil are fixed, and the lead wire of the second common mode choke coil is the core of the second common mode choke coil. The second coil component having the second fixing member provided with the second identification mark indicating the second winding direction, which is the winding direction, and the first coil component and the second coil component are adjacent to each other. The first coil component and the second coil component include a substrate arranged in such a manner, and the first coil component and the second coil component have a first winding direction and a second winding direction in a direction in which the first coil component and the second coil component are arranged side by side. They are arranged on the substrate so that the winding direction is opposite to that of the winding direction.

In the in-vehicle charger configured as described above, the number of parts for reducing differential mode noise can be reduced.

It is a block diagram which shows the vehicle-mounted charger and the component connected to the vehicle-mounted charger according to the first embodiment. It is a block diagram which shows the circuit structure of the vehicle-mounted charger which concerns on Embodiment 1. FIG. FIG. 5 is a plan view of two coil components included in the filter circuit of the vehicle-mounted charger according to the first embodiment as viewed from a direction orthogonal to the substrate on which the coil components are arranged. It is a circuit diagram of the filter circuit of the vehicle-mounted charger according to the first embodiment. It is a figure which shows the path of the common mode noise generated in the circuit of the vehicle-mounted charger which concerns on Embodiment 1. FIG. It is a figure which shows the path of the differential mode noise generated in the circuit of the vehicle-mounted charger which concerns on Embodiment 1. FIG. It is a figure which shows the magnetic flux generated when the current of the differential mode flows through the common mode choke coil. It is a figure which shows the magnetic flux generated when the common mode current flows through the common mode choke coil. It is an equivalent circuit diagram of a common mode choke coil. The differential mode current flowed with the two common mode choke coils connected so that the winding directions of the conductors of the two common mode choke coils were opposite in the direction in which the two common mode choke coils were lined up. It is a figure which shows the magnetic flux generated at the time. A common mode current flowed in a state where the two common mode choke coils were connected so that the winding directions of the conductors of the two common mode choke coils were opposite in the direction in which the two common mode choke coils were lined up. It is a figure which shows the magnetic flux generated at the time. It is an equivalent circuit diagram when two common mode choke coils are connected so that the winding direction of the conducting wire which two common mode choke coils have is opposite in the direction which two common mode choke coils are lined up. The differential mode current flowed while the two common mode choke coils were connected so that the winding direction of the conductors of the two common mode choke coils was the same in the direction in which the two common mode choke coils were lined up. It is a figure which shows the magnetic flux generated at the time. A common mode current flowed in a state where the two common mode choke coils were connected so that the winding direction of the conductors of the two common mode choke coils was the same in the direction in which the two common mode choke coils were lined up. It is a figure which shows the magnetic flux generated at the time. It is an equivalent circuit diagram when two common mode choke coils are connected so that the winding direction of the conducting wire which two common mode choke coils have is the same in the direction in which two common mode choke coils are lined up. FIG. 5 is a plan view of two coil components included in the filter circuit of the vehicle-mounted charger according to the comparative example as viewed from a direction orthogonal to the substrate on which the coil components are arranged. FIG. 5 is a plan view of a coil component included in the filter circuit of the vehicle-mounted charger according to the second embodiment as viewed from a direction orthogonal to the substrate on which the coil component is arranged. FIG. 5 is a plan view of two coil components included in the filter circuit of the vehicle-mounted charger according to the second embodiment as viewed from a direction orthogonal to the substrate on which the coil components are arranged. FIG. 5 is a plan view of two coil components included in the filter circuit of the vehicle-mounted charger according to the comparative example as viewed from a direction orthogonal to the substrate on which the coil components are arranged. FIG. 5 is a plan view of two coil components included in the filter circuit of the vehicle-mounted charger according to the second embodiment as viewed from a direction orthogonal to the substrate on which the coil components are arranged. FIG. 5 is a plan view of two coil components included in the filter circuit of the vehicle-mounted charger according to the comparative example as viewed from a direction orthogonal to the substrate on which the coil components are arranged. FIG. 5 is a plan view showing a state in which three coil parts included in the filter circuit of the vehicle-mounted charger according to the second embodiment are arranged side by side. FIG. 5 is a plan view of a coil component included in a filter circuit of an in-vehicle charger according to another embodiment as viewed from a direction orthogonal to a substrate on which the coil component is arranged. FIG. 5 is a plan view showing a state in which three coil parts included in the filter circuit of the vehicle-mounted charger according to another embodiment are arranged side by side.

Hereinafter, the in-vehicle charger, which is one embodiment, will be described with reference to the attached drawings. The same reference numerals are given to the same configurations in each embodiment.

Embodiment 1.
FIG. 1 is a block diagram showing a vehicle-mounted charger and parts connected to the vehicle-mounted charger according to the first embodiment. FIG. 2 is a block diagram showing a circuit configuration of the vehicle-mounted charger according to the first embodiment.

The vehicle-mounted charger 3 according to the first embodiment is a charger for charging a battery that supplies power to a motor for an electric vehicle such as an EV (electric vehicle) or a PHEV (plug-in hybrid electric vehicle). Yes, it is mounted on the electric vehicle 1.

As shown in FIG. 1, the in-vehicle charger 3 is connected to an external power source 2 such as a commercial AC power source or a private power generator, and an AC current is input from the external power source 2. The vehicle-mounted charger 3 boosts the alternating current input from the external power source 2 and converts it into a direct current, and charges the main battery 4 connected to the output side of the vehicle-mounted charger 3. The electric power stored in the main battery 4 by the in-vehicle charger 3 is supplied to the motor 6 that drives the electric vehicle 1 via the inverter 5, and the PTC heater (Positive Temperature Cooperative heater) mounted on the electric vehicle 1 and the like. It is also supplied to the loads 7 and 8. Further, the vehicle-mounted charger 3 is connected to the controller 9. The controller 9 is connected to the inverter 5 and the motor 6 in addition to the in-vehicle charger 3, and is charged in the vehicle based on the measurement results of the voltage, current, temperature, and the like in the circuit of the in-vehicle charger 3, the inverter 5, and the motor 6. It controls the charger 3, the inverter 5, and the motor 6.

As shown in FIG. 2, the vehicle-mounted charger 3 includes a filter circuit 31, a PFC circuit 32, a DC / AC conversion circuit 33, a transformer 34, an AC / DC conversion circuit 35, and a filter circuit 36. The filter circuit 31 removes a noise component from the alternating current input to the vehicle-mounted charger 3. Then, the alternating current from which noise has been removed by the filter circuit 31 is output to the PFC circuit 32. The PFC circuit 32 is a circuit for the purpose of improving the power factor of the input power. The alternating current input to the PFC circuit 32 is rectified into a unidirectional pulsating current by the rectifier circuit of the PFC circuit 32, and is output to the DC / AC conversion circuit 33. The DC / AC conversion circuit 33 is a full-bridge circuit having four switching elements, converts the pulsating current input from the PFC circuit 32 into a square wave current having a desired frequency, and outputs the current to the transformer 34. The current flowing into the transformer 34 is boosted to a voltage sufficient for charging the main battery 4 while maintaining the state of a square wave, and is output to the AC / DC conversion circuit 35. The current flowing into the AC / DC conversion circuit 35 is converted into a direct current by the AC / DC conversion circuit 35, noise is removed by the filter circuit 36, and the current is output to the main battery 4. The controller 9 connected to the in-vehicle charger 3 controls the switching element inside the PFC circuit 32, the switching element inside the DC / AC conversion circuit 33, and the switching element inside the AC / DC conversion circuit 35.

FIG. 3 is a plan view of two coil components included in the filter circuit of the vehicle-mounted charger according to the first embodiment as viewed from a direction orthogonal to the substrate on which the coil components are arranged.

As shown in FIG. 3, the filter circuit 31 of the vehicle-mounted charger according to the first embodiment has a first coil component 311 and a second coil component 312, and the first coil component 311 and the second coil. The component 312 is arranged adjacent to each other on the substrate 51 provided in the vehicle-mounted charger. In the following, in each component, the surface facing the substrate 51 is referred to as a lower surface, and the surface opposite to the lower surface is referred to as an upper surface.

The first coil component 311 has a first common mode choke coil 3110 and a first fixing member 3115.

The first common mode choke coil 3110 has a core 3111, a conductor 3112, and a conductor 3113. The core 3111 is a magnetic material such as ferrite forming an annular shape. The

conductors

3112 and 3113 are wound around the core 3111. Here, the lead wire 3112 and the lead wire 3113 start at an end located on the opposite side of the core 3111 from the second coil component 312 in the direction from the first coil component 311 to the second coil component 312. It begins to be wound around the core 3111 and crosses the upper surface of the core 3111. After that, the

conductors

3112 and 3113 pass through the inside of the ring formed by the core 3111 and head toward the lower surface of the core 3111. Then, the

conductors

3112 and 3113 cross the lower surface of the core 3111, pass outside the ring formed by the core 3111, and head toward the upper surface of the core 3111. The

conductors

3112 and 3113 that have reached the upper surface of the core 3111 again cross the upper surface of the core 3111, pass through the inside of the ring formed by the core 3111, head toward the lower surface of the core 3111, and then cross the lower surface of the core 3111. It passes through the outside of the ring formed by the core 3111 and faces the upper surface of the core 3111. Following such a path, the conductor wound around the core 3111 a plurality of times finally crosses the lower surface of the core 3111 and separates from the core 3111. In this way, in the direction from the first coil component 311 to the second coil component 312, the

conductors

3112 and 3113 cross the upper surface of the core 3111 and then begin to be wound around the core 3111 and cross the lower surface of the core 3111. The direction in which the conductor 3112 and the conductor 3113 are wound around the core 3111 when the winding is completed is called the first winding direction.

The first fixing member 3115 is a case that surrounds the circumference of the first common mode choke coil 3110, and the first common mode choke coil 3110 is fixed. However, the first fixing member 3115 does not cover the upper surface side of the first common mode choke coil 3110. Further, the first fixing member 3115 is provided with the first identification mark 3150. Specifically, the first identification mark 3150 is the closest to the portion where the

conductors

3112 and 3113 of the first common mode choke coil 3110 start to be wound around the core 3111 after crossing the upper surface of the core 3111. It is provided on the wall surface of the fixing member 3115 of 1. As a result, the first identification mark 3150 serves as a mark indicating the first winding direction in the first common mode choke coil 3110. The first identification mark 3150 is a convex portion of the first fixing member that projects in the opposite direction to the second coil component 312. In the following, the convex portion that is the first identification mark 3150 will be referred to as the first convex portion.

The second coil component 312 has a second common mode choke coil 3120 and a second fixing member 3125.

The second common mode choke coil 3120 has a core 3121, a conducting wire 3122, and a conducting wire 3123. The core 3121 is a magnetic material such as ferrite forming an annular shape. The

conductors

3122 and 3123 are wound around the core 3121. Here, the

conductors

3122 and 3123 begin to be wound around the core 3121 in the direction from the first coil component 311 to the second coil component 312, starting from the end located on the first coil component 311 side. , Crosses the underside of the core 3121. After that, the

conductors

3122 and 3123 pass through the inside of the ring formed by the cores 3121 and head toward the upper surface of the cores 3121. Then, the

conductors

3122 and 3123 cross the upper surface of the core 3121, pass outside the ring formed by the core 3121, and head toward the lower surface of the core 3121. The

conductors

3122 and 3123 that have reached the lower surface of the core 3121 again cross the lower surface of the core 3121, pass through the inside of the ring formed by the core 3121, head toward the upper surface of the core 3121, and then cross the upper surface of the core 3121. It passes through the outside of the ring formed by the core 3121 and faces the lower surface of the core 3121. Following such a path, the conductor wound around the core 3121 a plurality of times finally crosses the upper surface of the core 3121 and separates from the core 3121. In this way, in the direction from the first coil component 311 to the second coil component 312, the

conductors

3122 and 3123 cross the lower surface of the core 3121 and then begin to be wound around the core 3121 and cross the upper surface of the core 3121. The direction in which the conducting wire 3122 and the conducting wire 3123 are wound around the core 3121 when the winding is completed is referred to as a second winding direction. The second winding direction is opposite to the first winding direction in the direction in which the first coil component 311 and the second coil component 312 are lined up.

The second fixing member 3125 is a case that surrounds the circumference of the second common mode choke coil 3120, and the second common mode choke coil 3120 is fixed. However, the second fixing member 3125 does not cover the upper surface side of the second common mode choke coil 3120. Further, the second fixing member 3125 is provided with a second identification mark 3250. Specifically, the second identification mark 3250 is closest to the winding end portion where the

conductors

3122 and 3123 of the second common mode choke coil 3120 cross the upper surface of the core 3121 and then separate from the core 3121. It is provided on the wall surface of the second fixing member 3125. As a result, the second identification mark serves as a mark indicating the second winding direction in the second common mode choke coil 3120. The second identification mark 3250 is a convex portion of the second fixing member 3125 that projects in the opposite direction to the first coil component 311. In the following, the convex portion which is the second identification mark 3250 will be referred to as a second convex portion.

As described above, the first coil component 311 and the second coil component 312 as described above are arranged so as to be adjacent to each other on the substrate 51 included in the vehicle-mounted charger 3. At this time, in the direction in which the first coil component 311 and the second coil component 312 are lined up, the first winding direction of the first common mode choke coil 3110 and the second winding of the second common mode choke coil 3120 are performed. The first coil component 311 and the second coil component 312 are arranged on the substrate 51 so that the directions are opposite to each other. Further, in the direction in which the first coil component 311 and the second coil component 312 are lined up, the first winding direction of the first common mode choke coil 3110 and the second winding direction of the second common mode choke coil 3120. The width G of the gap between the first coil component 311 and the second coil component 312 in which the first coil component 311 and the second coil component 312 are arranged on the substrate 51 so as to be opposite to each other is shown in FIG. As shown in 3, the height H1 of the first identification mark 3150, which is the first convex portion, more specifically, the first in the direction from the first coil component 311 to the second coil component 312. It is narrower than the height H1 of the identification mark 3150. Further, the width G of the gap is the height H2 of the second identification mark 3250, which is the second convex portion, and more specifically, the width G in the direction from the first coil component 311 to the second coil component 312. The height of the identification mark 3250 of 2 is narrower than H2. Further, the first coil component 311 and the second coil component 312 have the same shape.

FIG. 4 is a circuit diagram of the filter circuit of the vehicle-mounted charger according to the first embodiment. The filter circuit 31 of the vehicle-mounted charger 3 according to the first embodiment has a first common mode choke coil 3110 and a second common mode choke coil 3120 as an electric circuit.

The first common mode choke coil 3110 included in the first coil component 311 is connected to the second common mode choke coil 3120 included in the second coil component 312 in the order of electrical connection on the external power supply 2 side. Is located in. Further, as shown in FIG. 4, the first common mode choke coil 3110 has two input terminals. Further, the first common mode choke coil 3110 has two output terminals. Then, the voltage signals of L (Live) and N (NEUTRAL) are input to the first common mode choke coil 3110 from the external power supply 2 via the two input terminals. After that, the input voltage signal passes through the first common mode choke coil 3110 and is output from the two output terminals of the first common mode choke coil 3110.

The second common mode choke coil 3120 is located on the PFC circuit 32 side in the order of electrical connection with respect to the first common mode choke coil 3110. Further, the second common mode choke coil 3120 has two input terminals as shown in FIG. Further, the second common mode choke coil 3120 has two output terminals. Then, the voltage signal output from the first common mode choke coil 3110 is input to the second common mode choke coil 3120 via these two input terminals. After that, the input voltage signal passes through the second common mode choke coil 3120, is output from the two output terminals of the second common mode choke coil 3120, and goes to the PFC circuit 32. The voltage signal that passed through the first common mode choke coil 3110 and the second common mode choke coil 3120, that is, the voltage signal that passed through the filter circuit 31, was reduced to some extent in the differential mode as well as the common mode noise. In the state, it goes to the PFC circuit 32.

FIG. 5 is a diagram showing a path of common mode noise generated in the circuit of the vehicle-mounted charger according to the first embodiment. The mechanism of generating common mode noise will be described with reference to FIG.

A transformer 34 is mentioned as one of the sources of common mode noise generated in the circuit of the vehicle-mounted charger 3 according to the first embodiment. The noise generated from the transformer 34 propagates to the housing 37 via the first parasitic capacitance 38 generated between the transformer 34 and the housing 37 surrounding the transformer 34 and the like. Further, the noise propagated to the housing 37 propagates to the filter circuit 31 and the like via the second parasitic capacitance 39 generated between the filter circuit 31 and the housing 37. In this way, in the filter circuit 31 and the like, noise having the same phase flows through the power supply lines on the L (Live) side and the N (NEUTRAL) side, and this becomes common mode noise generated in the circuit of the vehicle-mounted charger 3.

FIG. 6 is a diagram showing a path of differential mode noise generated in the circuit of the vehicle-mounted charger according to the first embodiment. The mechanism of generating differential mode noise will be described with reference to FIG.

One of the sources of differential mode noise generated in the circuit of the vehicle-mounted charger 3 according to the first embodiment is a transistor included in the DC / AC conversion circuit 33 and the like. For example, noise is generated by switching the current with a transistor included in the DC / AC conversion circuit 33. The noise generated by this switching flows as it is to the power supply line in the circuit of the vehicle-mounted charger 3 without passing through the housing 37. As a result, noise of opposite phase flows between the power supply line on the L (Live) side and the power supply line on the N (NEUTRAL) side of the filter circuit 31 and the like included in the vehicle-mounted charger 3, and becomes differential mode noise.

FIG. 7 is a diagram showing the magnetic flux generated when a differential mode current flows through the common mode choke coil. FIG. 8 is a diagram showing a magnetic flux generated when a common mode current flows through the common mode choke coil. FIG. 9 is an equivalent circuit diagram of a common mode choke coil. In FIGS. 7, 8 and 9, taking the first common mode choke coil 3110 of the first coil component 311 as an example, the effects on the magnetic flux and each noise when the noise (current) of each mode flows. explain.

As shown in FIG. 7, when a differential mode current flows through the first common mode choke coil 3110, the magnetic flux 3143L and the conducting wire 3113 due to the electromagnetic induction phenomenon in the conducting wire 3112 are contained in the core 3111 of the first common mode choke coil 3110. A magnetic flux of 3143N is generated due to the electromagnetic induction phenomenon in. At this time, since the direction of the magnetic flux 3143L and the direction of the magnetic flux 3143N are opposite to each other, the magnetic flux 3143L and the magnetic flux 3143N cancel each other out. As a result, the first common mode choke coil 3110 basically does not function as an inductor with respect to the current in the differential mode. However, when a differential mode current flows through the first common mode choke coil 3110, not only magnetic flux 3143L and magnetic flux 3143N are generated in the core 3111, but also leakage flux 3144L from the lead wire 3112 and leakage flux from the lead wire 3113. 3144N is also generated. Due to these leakage fluxes, the first common mode choke coil 3110 functions to some extent as an inductor with respect to the current in the differential mode.

As shown in FIG. 8, when a common mode current flows through the first common mode choke coil 3110, the magnetic flux 3143L and the conducting wire 3113 due to the electromagnetic induction phenomenon in the conducting wire 3112 are contained in the core 3111 of the first common mode choke coil 3110. A magnetic flux of 3143N is generated due to the electromagnetic induction phenomenon in. At this time, since the direction of the magnetic flux 3143L and the direction of the magnetic flux 3143N are the same, the magnetic fluxes of each other are strengthened. As a result, the first common mode choke coil 3110 exerts a function as an inductor in principle with respect to the current in the common mode. However, when a common mode current flows through the first common mode choke coil 3110, not only magnetic flux 3143L and magnetic flux 3143N are generated in the core 3111, but also leakage flux 3144L from the lead wire 3112 and leakage flux from the lead wire 3113. 3144N is also generated. Due to these leakage fluxes, the first common mode choke coil 3110 functions as an inductor to some extent with respect to the differential mode current even when the common mode current flows.

As described above, the first common mode choke coil 3110 functions as an inductor with respect to the differential mode current in both cases when the differential mode current flows and when the common mode current flows. .. Considering this, the equivalent circuit diagram of the first common mode choke coil 3110 is an inductor 3147 on an ideal common mode choke coil 3146 that functions as a filter only for common mode currents, as shown in FIG. Is a circuit diagram connected in series.

FIG. 10 shows the differential mode in which the two common mode choke coils are connected so that the winding directions of the conductors of the two common mode choke coils are opposite in the direction in which the two common mode choke coils are lined up. It is a figure which shows the magnetic flux generated when a current flows. FIG. 11 shows a common mode with two common mode choke coils connected so that the winding directions of the conductors of the two common mode choke coils are opposite in the direction in which the two common mode choke coils are lined up. It is a figure which shows the magnetic flux generated when a current flows. FIG. 12 is an equivalent circuit diagram when two common mode choke coils are connected so that the winding directions of the conductors of the two common mode choke coils are opposite in the direction in which the two common mode choke coils are lined up. be. FIG. 13 is generated when a differential mode current flows in a state where the winding directions of the conductors of the two common mode choke coils are connected so as to be the same in the direction in which the two common mode choke coils are lined up. It is a figure which shows the magnetic flux. FIG. 14 shows a common mode with two common mode choke coils connected so that the winding directions of the conductors of the two common mode choke coils are the same in the direction in which the two common mode choke coils are lined up. It is a figure which shows the magnetic flux generated when a current flows. FIG. 15 is an equivalent circuit diagram when two common mode choke coils are connected so that the winding directions of the conductors of the two common mode choke coils are the same in the direction in which the two common mode choke coils are lined up. ..

As shown in FIG. 10, the first winding direction in which the lead wire 3112 and the lead wire 3113 of the first common mode choke coil 3110 are wound around the core 3111, and the lead wire 3122 of the second common mode choke coil 3120. In the differential mode, the two common mode choke coils are connected so that the second winding direction, which is the direction in which the lead wire 3123 is wound around the core 3121, is opposite in the direction in which the two common mode choke coils are lined up. When the current of (1) flows, the leakage magnetic flux 3144L, the leakage magnetic flux 3144N, the leakage magnetic flux 3244L and the leakage magnetic flux 3244N generated from the two common mode choke coils are hardly coupled. As a result, the two connected common-mode choke coils not only function as common-mode choke coils, as if the current of each mode flows through a single common-mode choke coil, but to some extent, the differential mode current. Acts as an inductor. Further, as shown in FIG. 11, the lead wire 3112 and the lead wire 3113 included in the first common mode choke coil 3110 have a first winding direction in which the lead wire 3113 is wound around the core 3111, and the second common mode choke coil 3120 has. With the two common mode choke coils connected so that the second winding direction, which is the direction in which the lead wire 3122 and the lead wire 3123 are wound around the core 3121, is opposite in the direction in which the two common mode choke coils are lined up. Even when a common mode current flows, the leakage flux 3144L, the leakage flux 3144N, the leakage flux 3244L, and the leakage flux 3244N generated from the two common mode choke coils are hardly coupled. Therefore, the first winding direction in which the lead wire 3112 and the lead wire 3113 of the first common mode choke coil 3110 are wound around the core 3111, and the lead wire 3122 and the lead wire 3123 of the second common mode choke coil 3120 are the cores. FIG. 12 shows an equivalent circuit diagram when two common mode choke coils are connected so that the second winding direction, which is the winding direction of 3121, is opposite in the direction in which the two common mode choke coils are lined up. As shown, an inductor 3147 and an inductor 3148 are connected in series between an ideal common mode choke coil 3146 and a common mode choke coil 3246 that function as a filter only for a common mode current.

Here, tentatively, as shown in FIG. 13, the first winding direction in which the conducting wire 3112 and the conducting wire 3113 included in the first common mode choke coil 3110 are wound around the core 3111, and the second common mode choke coil The two common mode choke coils are connected so that the second winding direction, which is the direction in which the conductor 3122 and the conductor 3123 of the 3120 are wound around the core 3121, is the same in the direction in which the two common mode choke coils are lined up. Suppose. When a current in the differential mode flows in this state, the leakage magnetic flux 3144L and the leakage magnetic flux 3244L generated from the two common mode choke coils are coupled, and further, the leakage magnetic flux 3144N and the leakage magnetic flux 3244N are coupled. In this case, the two connected common mode choke coils function as common mode choke coils, unlike the case where the current of each mode flows through a single common mode choke coil. Almost no function as an inductor. Further, as shown in FIG. 14, the lead wire 3112 and the lead wire 3113 included in the first common mode choke coil 3110 have a first winding direction in which the lead wire 3113 is wound around the core 3111, and the second common mode choke coil 3120 has. With the two common mode choke coils connected so that the second winding direction, which is the direction in which the lead wire 3122 and the lead wire 3123 are wound around the core 3121, is the same in the direction in which the two common mode choke coils are lined up. Even when a common mode current flows, the leakage magnetic flux 3144L and the leakage magnetic flux 3244L generated from the two common mode choke coils are coupled, and the leakage magnetic flux 3144N and the leakage magnetic flux 3244N are coupled. Therefore, the first winding direction in which the lead wire 3112 and the lead wire 3113 of the first common mode choke coil 3110 are wound around the core 3111, and the lead wire 3122 and the lead wire 3123 of the second common mode choke coil 3120 are the cores. FIG. 15 shows an equivalent circuit diagram when two common mode choke coils are connected so that the second winding direction, which is the winding direction of 3121, is the same in the direction in which the two common mode choke coils are lined up. As shown, an inductor 3147 and an inductor 3148 that generate a minute impedance are connected in series between an ideal common mode choke coil 3146 and a common mode choke coil 3246 that function as a filter only for a common mode current. It becomes a circuit. The filter circuit 31 of the vehicle-mounted charger 3 according to the first embodiment has a first winding direction in which the lead wire 3112 and the lead wire 3113 of the first common mode choke coil 3110 are wound around the core 3111, and a first winding direction. Two common modes so that the second winding direction, which is the direction in which the lead wire 3122 and the lead wire 3123 of the two common mode choke coils 3120 are wound around the core 3121, are opposite in the direction in which the two common mode choke coils are lined up. The choke coil is connected. Therefore, the equivalent circuit diagram of the filter circuit 31 of the vehicle-mounted charger 3 according to the first embodiment is shown in FIG. 12 instead of FIG.

FIG. 16 is a plan view of two coil components included in the filter circuit of the vehicle-mounted charger according to the comparative example as viewed from a direction orthogonal to the substrate on which the coil components are arranged.

In the vehicle-mounted charger 3 according to the first embodiment configured as described above, the number of parts for reducing the differential mode noise can be reduced. Specifically, the first coil component 311 and the second coil component 312 included in the filter circuit 31 of the vehicle-mounted charger 3 are arranged on the substrate 51 so as to be adjacent to each other. Further, in the filter circuit 31, the first winding direction in which the lead wire of the first common mode choke coil 3110 is wound around the core and the direction in which the lead wire of the second common mode choke coil 3120 is wound around the core. The first coil component 311 and the second coil component 312 are placed on the substrate 51 so that the second winding direction is opposite in the direction in which the first coil component 311 and the second coil component 312 are arranged. They are lined up. As a result, as described above, the filter circuit 31 not only functions as a common mode choke coil, but also functions as an inductor with respect to the current in the differential mode. Therefore, in the vehicle-mounted charger 3, it is not necessary to add new parts in order to reduce the differential mode noise. That is, in the in-vehicle charger 3, the number of parts for reducing the differential mode noise can be reduced.

Here, when assembling the filter circuit, it is difficult to determine the winding direction of the lead wire of the common mode choke coil. However, in the filter circuit 31 of the vehicle-mounted charger 3, the first coil component 311 has a first winding direction indicating a first winding direction in which the lead wire of the first common mode choke coil 3110 is wound around the core. An identification mark 3150 is provided, and the second coil component 312 is provided with a second identification mark 3250 indicating a second winding direction in which the lead wire of the second common mode choke coil 3120 is wound around the core. Has been done. This makes it possible to determine the winding direction of the conductor of each common mode choke coil, and the first winding direction and the second winding direction are in the direction in which the first coil component 311 and the second coil component 312 are lined up. The first coil component 311 and the second coil component 312 can be arranged on the substrate 51 so as to be opposite. As a result, the in-vehicle charger 3 can achieve the effect of reducing the number of parts for reducing the differential mode noise.

By the way, the first identification mark 3150 indicating the first winding direction, which is the direction in which the lead wire of the first common mode choke coil 3110 is wound around the core, is attached to the second coil component 312 in the first fixing member 3115. It is a first convex portion that protrudes in the opposite direction. Further, the height H1 of the first convex portion is the height H1 of the first coil component 311 and the second coil component 312 when the first coil component 311 and the second coil component 312 are arranged on the substrate 51. It is narrower than the width G of the gap. Therefore, let's place the first coil component 311 on the substrate 51 so that the first winding direction of the first common mode choke coil 3110 and the second winding direction of the second common mode choke coil 3120 are the same. Then, as shown in FIG. 16, the first identification mark 3150 of the first coil component 311 comes into contact with the second coil component 312. Therefore, in the vehicle-mounted charger 3, the effect of suppressing the erroneous assembly of parts is high as compared with the case where the first identification mark 3150 is a mark applied to, for example, the first fixing member 3115.

Also, regarding the second coil component 312, the second identification mark 3250 indicating the second winding direction, which is the direction in which the conducting wire of the second common mode choke coil 3120 is wound around the core, is a second fixing member. It is a second convex portion that protrudes in the direction opposite to the first coil component 311 in the 3125. The height H2 of the second convex portion, which is the second identification mark 3250, is narrower than the width G of the gap between the first coil component 311 and the second coil component 312. Therefore, let's place the second coil component 312 on the substrate 51 so that the first winding direction of the first common mode choke coil 3110 and the second winding direction of the second common mode choke coil 3120 are the same. Then, the second identification mark 3250 of the second coil component 312 comes into contact with the first coil component 311. From the above, when assembling the filter circuit 31, the second winding direction of the first common mode choke coil 3110 and the second winding direction of the second common mode choke coil 3120 are the same. The coil component 312 of the above cannot be placed on the substrate 51. Therefore, in the vehicle-mounted charger 3, the effect of suppressing the erroneous assembly of parts is higher than in the case where the second identification mark 3250 is a mark applied to the second fixing member 3125.

Further, the first coil component 311 and the second coil component 312 have the same shape. Therefore, in the vehicle-mounted charger 3, the types of parts can be reduced as compared with the case where the first coil component 311 and the second coil component 312 have different shapes.

Embodiment 2.
FIG. 17 is a plan view of the coil component included in the filter circuit of the vehicle-mounted charger according to the second embodiment as viewed from a direction orthogonal to the substrate on which the coil component is arranged. FIG. 18 is a plan view of two coil components included in the filter circuit of the vehicle-mounted charger according to the second embodiment as viewed from a direction orthogonal to the substrate on which the coil components are arranged. FIG. 19 is a plan view of two coil components included in the filter circuit of the vehicle-mounted charger according to the comparative example as viewed from a direction orthogonal to the substrate on which the coil components are arranged. FIG. 20 is a plan view of two coil components included in the filter circuit of the vehicle-mounted charger according to the second embodiment as viewed from a direction orthogonal to the substrate on which the coil components are arranged. FIG. 21 is a plan view of two coil components included in the filter circuit of the vehicle-mounted charger according to the comparative example as viewed from a direction orthogonal to the substrate on which the coil components are arranged. FIG. 22 is a plan view showing a state in which three coil parts included in the filter circuit of the vehicle-mounted charger according to the second embodiment are arranged side by side.

The difference between the vehicle-mounted charger according to the second embodiment and the vehicle-mounted charger according to the first embodiment is the first identification mark and the second identification mark provided on the first coil component according to the second embodiment. This is the second identification mark provided on the coil component. Therefore, the code of the first identification mark according to the second embodiment is set to 3150A, and the code of the second coil component is set to 3250A.

As shown in FIG. 17, the first identification mark 3150A according to the second embodiment is a portion where the

conductors

3112 and 3113 of the first common mode choke coil 3110 cross the lower surface of the core 3111 and separate from the core 3111. It is provided on the wall surface of the first fixing member 3115, which is closest to a certain winding end portion. Further, the first identification mark 3150A is a first convex portion which is a convex portion protruding in the direction in which the first coil component 311 and the second coil component 312 are aligned, and the first coil component 311 and the second. It is composed of a first recess that is recessed in the direction in which the coil component 312 of the above is aligned.

Further, as shown in FIG. 18, the second identification mark 3250A is a portion where the

conductors

3122 and 3123 of the second common mode choke coil 3120 start to be wound around the core 3121 after crossing the lower surface of the core 3121. It is provided on the wall surface of the second fixing member 3125, which is closest to the winding start portion. Further, the second identification mark 3250A is a second convex portion which is a convex portion protruding in the direction in which the first coil component 311 and the second coil component 312 are aligned, and the first coil component 311 and the second. It is composed of a second recess that is recessed in the direction in which the coil component 312 of the above is aligned. Then, in the vehicle-mounted charger according to the second embodiment, the first winding direction and the second winding direction are opposite in the direction in which the first coil component 311 and the second coil component 312 are lined up. When the first coil component 311 and the second coil component 312 are arranged on the substrate 51, the first convex portion is located in the second concave portion and the second convex portion is in the first concave portion. Located in. Further, the first coil component 311 and the second coil component 312 have the same shape.

In the vehicle-mounted charger according to the second embodiment as described above, the filter circuit can be easily assembled as compared with the vehicle-mounted charger according to the first embodiment. Specifically, in the vehicle-mounted charger according to the first embodiment, the first winding direction and the second winding direction are opposite in the direction in which the first coil component 311 and the second coil component 312 are lined up. In addition, even when the first coil component 311 and the second coil component 312 are arranged on the substrate 51, as shown in FIG. 19, the first identification mark 3150 of the first coil component 311 is placed on the first identification mark 3150. When the second identification mark 3250 of the second coil component 312 is directed toward the first coil component 311 side toward the second coil component 312 side, the first identification mark 3150 and the second identification mark 3250 come into contact with each other. do. Therefore, in the vehicle-mounted charger according to the first embodiment, the first winding direction and the second winding direction are opposite to each other in the direction in which the first coil component 311 and the second coil component 312 are arranged. When the first coil component 311 and the second coil component 312 are to be arranged on the substrate 51, the first identification mark 3150 and the second identification mark 3250 come into contact with each other, and the first coil component 311 and the first coil component 311 and the second coil component 312 come into contact with each other. The second coil component 312 may not be attached to the substrate 51. However, in the vehicle-mounted charger according to the second embodiment, the first identification mark 3150A of the first coil component 311 shown in FIG. 18 is directed to the second coil component 312 side, and the second coil component 312 When the second identification mark 3250A is directed to the first coil component 311 side, the first identification mark 3150A of the first coil component 311 shown in FIG. 20 is on the opposite side to the second coil component 312. In any case where the second identification mark 3250A of the second coil component 312 is directed to the opposite side of the first coil component 311 toward the first coil component 311 and the second coil component. The 312 can be attached to the substrate 51. Therefore, in the vehicle-mounted charger according to the second embodiment, the filter circuit can be easily assembled as compared with the vehicle-mounted charger according to the first embodiment. As shown in FIG. 21, in the vehicle-mounted charger according to the second embodiment, the first coil component 311 and the second coil component are provided so that the first winding direction and the second winding direction are the same. When the 312 is to be placed on the substrate 51, the first identification mark 3150 comes into contact with the second coil component 312, or the second identification mark 3250 comes into contact with the first coil component 311. Therefore, the vehicle-mounted charger according to the second embodiment also has the first winding direction and the first winding direction of the first common mode choke coil 3110 when the filter circuit 31 is assembled, similarly to the vehicle-mounted charger according to the first embodiment. The first coil component 311 and the second coil component 312 cannot be placed on the substrate 51 so that the second winding direction of the common mode choke coil 3120 of 2 is the same.

Further, in the in-vehicle charger according to the second embodiment, the degree of freedom in arranging the coil parts can be improved as compared with the in-vehicle charger according to the first embodiment. As described above, in the vehicle-mounted charger according to the second embodiment, as shown in FIG. 18, the first identification mark 3150A of the first coil component 311 is directed toward the second coil component 312, and the second coil When the second identification mark 3250A of the component 312 is directed toward the first coil component 311, the first identification mark 3150A of the first coil component 311 is attached to the second coil component 312 as shown in FIG. On the other hand, in any case where the second identification mark 3250A of the second coil component 312 is directed to the opposite side with respect to the first coil component 311, the first coil component 311 and the first coil component 311 and the first coil component 311 are directed to the opposite side. The coil component 312 of 2 can be attached to the substrate 51. Applying this, in the vehicle-mounted charger according to the second embodiment, for example, as shown in FIG. 22, a third coil component 313 having the same shape as the first coil component 311 is added, and three or more are added. The coil components can be arranged on the substrate 51 so as to be adjacent to each other. Therefore, the in-vehicle charger according to the second embodiment can improve the degree of freedom in arranging the coil parts as compared with the in-vehicle charger according to the first embodiment.

Other configurations of the vehicle-mounted charger according to the second embodiment are the same as those of the vehicle-mounted charger according to the first embodiment. Therefore, other configurations and effects in the vehicle-mounted charger according to the second embodiment are as described in the vehicle-mounted charger according to the first embodiment.

Other embodiments.
The in-vehicle charger according to the present disclosure is not limited to the above-described embodiment and can be changed within the scope of the gist thereof. For example, from the viewpoint of reducing the number of parts for reducing differential mode noise, the first identification mark 3150 of the first coil part 311 needs to be a convex portion provided on the first fixing member 3115. However, for example, it may be a mark applied to the first fixing member 3115. The second identification mark 3250 of the second coil component 312 does not have to be a convex portion provided on the second fixing member 3125, and is, for example, a mark applied to the second fixing member 3125. May be good. Furthermore, the shape of the first coil component 311 and the shape of the second coil component 312 do not have to be the same. Therefore, from the viewpoint of reducing the number of parts for reducing the differential mode noise, the first identification mark 3150 of the first coil part 311 is a mark applied to the first fixing member 3115. When the second identification mark 3250 of the second coil component 312 is a convex portion provided on the second fixing member 3125, or when the first identification mark 3150 of the first coil component 311 is the first fixing member 3115. It is also possible that the second identification mark 3250 of the second coil component 312 is a mark applied to the second fixing member 3125. Further, both the first identification mark 3150 of the first coil component 311 and the second identification mark 3250 of the second coil component 312 may be marks applied to each fixing member.

Further, the first identification mark 3150 of the first coil component 311 does not have to be provided only on one wall surface of the first fixing member 3115, and the first fixing member of the first coil component 311 has. It may be provided on both surfaces of the 3115, which are located in the direction in which the first coil component 311 and the second coil component 312 are arranged side by side. The second identification mark 3250 of the second coil component 312 also does not need to be provided on only one wall surface of the second fixing member 3125, and the second fixing member 3125 included in the second coil component 312. The first coil component 311 and the second coil component 312 may be provided on both surfaces of the above. At this time, as shown in FIG. 23, the shape of the first identification mark is symmetrical in the direction in which the first coil component 311 and the second coil component 312 are lined up, and further, the first coil component 311 and the second coil component 311 and the second coil component 312 are arranged. By forming a concave portion on one side and a convex portion on the other side in a direction orthogonal to the direction in which the coil parts 312 of the above are arranged, not only two but, for example, the same as the first coil part 311 as shown in FIG. 24. A third coil component 313 of the shape can be added, and three or more coil components can be arranged adjacent to each other on the substrate 51. In addition to this, each embodiment may be combined.

3 In-vehicle charger, 51 board, 311 first coil part, 312 second coil part, 3110 first common mode choke coil, 3111 core, 3112 conductor wire, 3113 conductor wire, 3115 first fixing member, 3150 first Identification mark, 3120, 2nd common mode choke coil, 3121 core, 3122 lead wire, 3123 lead wire, 3125, 2nd fixing member, 3250, 2nd identification mark

Claims

A member to which the first common mode choke coil and the first common mode choke coil are fixed, and the conductor of the first common mode choke coil is wound around the core of the first common mode choke coil. A first coil component having a first fixing member provided with a first identification mark indicating a first winding direction, which is a direction, and a first coil component.
A member to which a second common mode choke coil electrically connected to the first common mode choke coil and the second common mode choke coil are fixed, the second common mode choke coil. A second coil component having a second fixing member provided with a second identification mark indicating a second winding direction in which the lead wire is wound around the core of the second common mode choke coil.
The first coil component and the substrate on which the second coil component is arranged so as to be adjacent to each other are provided.
The first coil component and the second coil component have opposite the first winding direction and the second winding direction in the direction in which the first coil component and the second coil component are lined up. In-vehicle chargers arranged on the board so as to be.
The first identification mark is a first convex portion of the first fixing member that projects in the opposite direction to the second coil component.
The vehicle-mounted charger according to claim 1, wherein the width of the gap between the first coil component and the second coil component arranged on the substrate is narrower than the height of the first convex portion.
The second identification mark is a second convex portion of the second fixing member that projects in the opposite direction to the first coil component.
The vehicle according to claim 1 or 2, wherein the width of the gap between the first coil component and the second coil component arranged on the substrate is narrower than the height of the second convex portion. Charger.
The first identification mark is provided with a first convex portion protruding in a direction in which the first coil component and the second coil component are aligned, and the first convex portion of the first fixing member. It is a first recess that is located on the surface and is recessed in the direction in which the first coil component and the second coil component are aligned.
The second identification mark is provided with a second convex portion protruding in the direction in which the first coil component and the second coil component are aligned, and the second convex portion of the second fixing member. The vehicle-mounted charger according to claim 1, which is a second recess that is located on the surface and is recessed in the direction in which the first coil component and the second coil component are aligned.
The vehicle-mounted charger according to any one of claims 1 to 4, wherein the first coil component and the second coil component have the same shape.