JPH07115778A - Inverter device - Google Patents

Abstract

PURPOSE:To provide an inverter device in which the necessity of design change may be saved without necessity of an excess space in the case of employing an inverter and which can be mounted as it is and can be easily coped with an additional installation. CONSTITUTION:A shape, mounting size, etc., of a heat dissipating fin 4 of an inverter device 1A are formed the same as the cover of the terminal box 11 of an existing motor 10, and the device 1A can be inverter-controlled easily merely by replacing with the cover of the box 11. Accordingly, the additional installation of the device to existing apparatus and an improvement in built-in performance can be sufficiently advanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter device directly attached to a device to be controlled and used,
The present invention relates to an inverter device suitable for being used by being attached to an existing induction motor or electric pump, and an inverter device suitable for being incorporated in a device in advance and used.

[0002]

2. Description of the Related Art In recent years, semiconductor devices have made remarkable progress,
This has greatly reduced the size and weight of inverters and made them less expensive, and has greatly contributed to the expansion of their application range. Along with this, measures have been widely adopted for improving the function of existing electric devices such as induction motors by adding inverters. As an inverter having a relatively small capacity of less than kilowatt, for example, an inverter device integrated as shown in FIG. 7 has been conventionally used.

In the conventional inverter device shown in FIG. 7, 1 is an inverter body, 2 is an operation panel, 3 is a capacitor, 4 is a radiation fin, 5 is a main circuit board, 6 is a control circuit board, and 7 is a diode module. , 8 is a transistor module, and 9 is a terminal block.

The inverter body 1 is composed of a main circuit board 5, a control circuit board 6, a diode module 7, a transistor module 8 and a terminal block 9. Then, as shown in the figure, the diode module 7 forming the forward conversion unit and the transistor module 8 forming the reverse conversion unit are directly attached to the heat radiation fins 4 because they require heat radiation and are connected by the main circuit board 5. The capacitor 3 and the control circuit board 6 are provided on the heat radiation fin 4 so as to be sequentially stacked, and the operation panel 2 is provided on the operation panel 2 so that the operation surface appears to the outside. Further, a terminal block 9 is provided on the main circuit board 5 and the control circuit board 6 so that electric wires can be connected from the lower side of the figure. Then, the conventional integrated inverter device is entirely housed in the control panel, and the operation panel 2
Is to be used by being attached to the control panel so that it appears on the surface of the control panel.

On the other hand, as described above, instead of being mounted on the control panel for use, as shown in FIG. 8 or 9,
Conventionally, an inverter device that is directly attached to a device to be controlled and used is also proposed. In both of the examples of FIGS. 8 and 9, the inverter device is attached to the electric motor 10 for driving the pump, and 30 indicates the pump. In these examples, main elements such as a diode module and a transistor are housed in the inverter main body 1 attached to the heat dissipation fin 4 and separated from other portions, and then attached to the electric motor 10 as illustrated. It is a thing. The difference between the example of FIG. 8 and the example of FIG. 9 is only whether or not the operation panel 2 is separated.

[0006]

The above-mentioned prior art does not give sufficient consideration to the fact that it is used in addition to equipment such as existing electric motors and pumps. In such a case,
There were problems such as the need to separately install a control panel and some kind of ingenuity in installing the inverter device.

That is, among the conventional inverter devices, the example described in FIG. 7 is based on the premise that the conventional inverter device is housed in the control panel as described above, and therefore an inverter is newly adopted. In this case, a separate control panel needs to be installed.Therefore, if an existing electric device such as an electric motor is to be converted into an inverter drive later, a new control panel must be installed. There is a problem that modification is impossible if there is not enough space, and even if a new control panel can be installed, additional changes in wiring and software are necessary. On the other hand, the example explained in FIGS. 8 and 9 However, since no specific mounting means is mentioned, it cannot be mounted as it is, and some other means is required separately, and in the end, additional installation of the inverter device is difficult. Than that there is a problem that becomes.

An object of the present invention is that it does not require an extra space when adopting an inverter, requires less design changes, can be easily installed as it is, and can easily accommodate additional installation. It is to provide an inverter device that can perform.

[0009]

SUMMARY OF THE INVENTION The above-mentioned object is premised on a device to be controlled to which an inverter device is to be attached, and the entire device including the shape of the heat radiation fins of the inverter device according to a specific portion of the device. This is achieved by defining the shape and providing necessary mounting members according to specific parts of the device.

[0010]

The radiating fins whose shape is matched to the specific part of the device to be controlled and the mounting member provided to match the specific part of the device allow the inverter device to be mounted as it is. Therefore, since the inverter device can be directly and easily and easily attached to the device, it is possible to sufficiently improve the performance of the existing device by additionally installing the inverter device and incorporating it.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An inverter device according to the present invention will be described in detail below with reference to embodiments shown in the drawings. FIG. 1 shows a first embodiment of the present invention. In the figure, 1A represents the whole inverter device, 10 is a general-purpose electric motor, and a terminal box 11 is provided as a standard example. The inverter device 1A is composed of the inverter body 1, the operation panel 2, the capacitor 3, the radiation fins 4, and the terminal block 5 as in the prior art. In this embodiment, the radiation fins 4 are In order to function as a lid of the terminal box 11 of the electric motor 10, the shape and the position and dimensions of the mounting screw holes are made to match the terminal box 11.

Therefore, according to this embodiment, the electric motor 10
By simply removing the lid of the terminal box 11 and attaching the radiating fins 4 of the inverter device 1A instead of the lid, the inverter device 1A can be directly attached to the electric motor 10 and the electric motor 10 can be controlled by the inverter.

When the heat radiation fin is not required so much, the heat radiation fin may be omitted and the inverter body may be directly attached to the terminal box. Further, when the operation portion is separated, the heat radiation fin side may be arranged on the upper surface.

Also at this time, in changing the connection of the wiring, the wiring connected to the terminal of the electric motor 10 is removed and connected to the power input terminal in the terminal block 5 of the inverter device 1A,
It is only necessary to connect the output terminal to the terminal of the electric motor in the terminal box 11. As a result, the inverter device 1A is started by controlling the start / stop relay of the electric motor 10.
The stop can be controlled.

As a result, according to this embodiment,
It is easy to change the control of the electric motor 10 to the inverter control system easily and always including the variable speed control with a minimum of work, regardless of whether there is space, without requiring any other wiring changes or software changes. Smooth start and stop control can be performed.

Next, FIG. 2 shows a second embodiment of the present invention.
The inverter device 1B according to the embodiment of the present invention is applied to the electric motor 10 having a cooling fan.
2 is a fan cover.

The fan cover 12 has a cooling fan housed therein and guides cooling air along the outside of the electric motor 10 to enhance the cooling effect.
In this embodiment, the inverter device 1B is attached to the end surface of the fan cover 12 via the radiation fins 4.

Therefore, in this embodiment, as shown in the drawing,
Fins are provided radially from the center, and the outer shape is the fan cover 1
The heat dissipating fins 4 are made cylindrical according to 2, and the inverter body 1 is also made cylindrical.

The fan cover 12 has a ventilation hole on its end face.
(Ventilation holes) are provided so that air can be sucked in through the ventilation holes. Further, in this embodiment, since the radiation fin 4 is attached to the end surface of the fan cover 12,
It is possible to obtain a sufficient cooling effect by the air flow sucked into the ventilation holes.

As a result, in this embodiment,
If heat radiation is not required so much, the heat radiation fins 4 may be omitted and the inverter body 1 may be attached to the end surface of the fan cover 12 with an appropriate gap.

In the embodiment of FIG. 2 also, the wiring connection is changed in the same manner as in the embodiment of FIG. 1, and the wiring is removed from the power supply that was also connected to the lead wire of the electric motor 10, and the terminal block of the inverter device 1B is removed. Simply connect to the input terminal of 5 and connect the lead wire of the electric motor 10 to the output terminal,
Therefore, also in this embodiment, the start / stop of the inverter device 1B can be controlled only by controlling the start / stop relay of the electric motor 10.

Although the embodiment of FIG. 2 has been described for the case where the present invention is applied to the electric motor 10 having the fan cover 12, in the case of the electric motor having no fan cover, the inverter device 1B is attached to which end bracket. May be attached.

Next, FIG. 3 shows a third embodiment of the present invention.
This is an embodiment in which the present invention is applied to an electric motor 10 having no terminal box or fan cover, which is suitable for a relatively small capacity electric motor, and in the drawing, 1C indicates an inverter device in this embodiment. , 13 are bands for mounting.

The band 13 is formed in a circular shape having a predetermined diameter in accordance with the outer shape of the electric motor 10 to be applied, and the clamp portion 1
4 are provided. Further, in response to this, the outer surface portion 4a of the heat radiation fin 4 is recessed in a shallow V shape as shown in the drawing, which causes rattling when positioned on the cylindrical side surface of the electric motor 10. It is fixed so that it does not occur.

Therefore, according to this embodiment, the band 13
The inverter device 1C can be easily attached to the electric motor 10 simply by loosening the bolts of the clamp portion 14 or removing the bolts and hanging the bolts around the outside of the electric motor 10 and tightening the band 13 with the clamp portion 14. Therefore, even an existing small electric motor can be easily controlled by an inverter.

At this time, when the electric motor 10 has a small capacity, the inverter device 1C can also be small and lightweight, so that fixing the inverter device 1C directly to the electric motor 10 with the band 13 causes no problem, but in some cases Alternatively, they may be fixed via a vibration-proof rubber or a heat insulating sheet.

By the way, although all of the above embodiments are directed to an electric motor such as an induction motor, the present invention is not limited to the electric motor, and it goes without saying that any device driven by the electric motor may be used. Therefore, an embodiment in which the present invention is applied to an electric pump will be described below. First, FIG. 4 shows an embodiment in which the present invention is applied to an electric submersible pump. An inverter device, 10 is an electric motor for driving a pump, 20 is a submersible pump unit, 21 is an intake port, 22 is a lead wire for control, 23 is a power line for supplying power, 24 is an electric motor 10 and an inverter device 1D. It is a power line that connects between.

The inverter device 1D is provided below the water intake 21 between the electric motor 10 and the submersible pump unit 20,
The details are as shown in FIG. As is apparent from FIG. 5, in this embodiment, the heat radiation fin 4 is made hollow, and the inverter body 1 and the capacitor 3 are housed inside the hollow portion. And the outer shape is made into a substantially cylindrical shape in accordance with the submersible pump unit 20,
A hole 24 through which the rotary shaft of the electric motor 10 penetrates is provided in the center part, and a plurality of fins 25 extending along the penetrating direction of the hole 25 are formed on both sides of the portion accommodating the capacitor 3.

Then, in the hollow portion of the radiation fin 4,
After accommodating the inverter main body 1 and the capacitor 3, a water resistant structure is formed by resin molding or the like, and lead wires 22 and power lines 23 and 24 also having a water resistant structure are taken out from this.

The control panel 2 is connected to the inverter body 1 via a lead wire 22 and performs operation input and display output. As the lead wire 22, an optical cable may be used as a measure against noise and serial transmission may be performed, for example.

Power for operation is supplied from an external power source to the power line 2
3 is supplied to the inverter device 1D, converted to a predetermined frequency, and then supplied to the electric motor via the power line 24, whereby the submersible pump unit 20 is driven at a variable speed.

Therefore, according to this embodiment, the inverter device 1D is also exposed to the water flow taken from the water intake 21,
Since a large cooling effect can be obtained, the size can be easily reduced, and as a result, an inverter device can be incorporated with almost no change in the outer shape or size of the entire pump and an inverter-controlled submersible pump can be provided.

Next, FIG. 6 shows an embodiment in which the present invention is applied to a pipe for piping of a pump, 1E is an inverter device in this embodiment, 30 is a pump, which is driven by an electric motor 10, Reference numeral 31 is a pipe for piping, which is a pipe on the discharge side of the pump 30, and 32a and 32b are flanges, which are joints of the pipe 31.

The radiation fin 4 of the inverter device 1E according to this embodiment is integrally formed with the pipe 31 and the inverter body 1 is attached to the pipe 31, as shown in the figure. Therefore, the inverter device 1E according to this embodiment is
Remove the pipe used as the piping of the existing pump 30, and use the flanges 32a and 32b instead.
By installing the pipe 31, it is not necessary to modify the existing pump equipment at all, and the inverter device 1 can be easily used without requiring an extra space.
E can be attached, and the electric motor 10 can be easily driven by an inverter.

Further, according to this embodiment, since the radiation fin 4 is integrated with the pipe 31 for piping, the heat conduction between them is good, and therefore, the pipe 31.
When the temperature of the fluid such as water passing through the inside is low, a high cooling effect is obtained, so that the inverter device 1E can be downsized.

On the other hand, in consideration of maintenance and the like, the heat radiation fin 4 is formed separately from the pipe 31, and the heat radiation fin 4 can be divided into a plurality of parts. The pipe 31 may be attached so as to surround the pipe 31 afterwards. Further, at this time, similarly to the embodiment of FIG. 3, a band may be used to attach to the pipe 31. Further, when the temperature of the fluid passing through the pipe 31 is high and the cooling effect due to this is not expected, a heat insulating material may be interposed between the heat radiation fin 4 and the pipe 31.

Therefore, according to this embodiment as well, the inverter device can be easily attached to the existing pump equipment, and the inverter can be easily driven.

Here, as for the embodiments of the present invention, other than the inventions described in the claims, it will be as follows.

<Embodiment 1> An electric submersible pump having at least an inverter main body and heat radiation fins, which is an inverter device directly attached to a device to be controlled for use, in which the device to be controlled has a substantially cylindrical shape. The radiation fin is formed in a substantially cylindrical shape having a hollow portion, at least the inverter main body portion is provided inside the hollow portion, and is mounted between the electric motor and the pump main body of the submersible pump. Characteristic inverter device.

<Embodiment 2> In an inverter device including at least an inverter main body and heat radiation fins, which is directly attached to a device to be controlled for use, the device to be controlled is an electric pump, and the heat radiation is An inverter device in which a fin is integrally formed so as to surround a part of a pipe of the pump.

<Embodiment 3> In an inverter device including at least an inverter main body and heat dissipation fins, which is directly attached to a device to be controlled for use, the device to be controlled is an electric pump, and the heat radiation is Fins are formed surrounding a part of the piping of the pump, and
An inverter device characterized in that the radiation fin is formed separately in a plurality of portions.

<Embodiment 4> In an inverter device which is provided with at least an inverter main body and heat radiation fins and is directly attached to a device to be controlled for use, the device to be controlled is an electric pump, and the heat radiation described above is used. An inverter device characterized in that a fin is configured to be attached to a part of a pipe of the pump with a band.

[0043]

According to the present invention, a predetermined attachment member is provided in advance in consideration of attachment to an existing device,
Alternatively, considering the addition and installation of an inverter to existing equipment, the overall shape has been rationalized in advance with the shape of the heat radiation fins in advance, so there is extra space, the type of target equipment, and the difference in installation status. It is always possible to add and install an inverter device to an existing device without considering the above, and it is possible to sufficiently improve the performance.

Further, according to the present invention, since it is possible to add or incorporate an inverter with almost no need to process existing equipment or change the installation state, the design period can be shortened and the number of man-hours can be reduced. It has the effect of finishing.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of an inverter device according to the present invention.

FIG. 2 is a partially transparent perspective view showing a second embodiment of the inverter device according to the present invention.

FIG. 3 is a partially transparent perspective view showing an inverter device according to a third embodiment of the present invention.

FIG. 4 is a partially perspective perspective view showing an inverter device according to a fourth embodiment of the present invention.

FIG. 5 is a perspective perspective view showing a part of an inverter portion in a fourth embodiment of an inverter device according to the present invention.

FIG. 6 is a partially transparent perspective view showing a fifth embodiment of the inverter device according to the present invention.

FIG. 7 is a partially transparent perspective view showing an example of a conventional inverter device.

FIG. 8 is a partially transparent perspective view showing another example of the inverter device according to the related art.

FIG. 9 is a partially transparent perspective view showing still another example of the inverter device according to the prior art.

[Explanation of symbols]

 1 Inverter body 1A, 1B, 1C, 1D, 1E Inverter device 2 Operation panel 3 Capacitor 4 Radiating fin 5 Terminal block 10 Electric motor 11 Terminal box 12 Fan cover 13 Band 14 Clamping part 20 Submersible pump part 30 Pump 31 Piping pipe

Claims (3)

[Claims] 1. An inverter device directly attached to a device to be controlled and used, wherein the device to be controlled is an electric motor having a terminal box, and the inverter device covers the terminal box lid of the electric motor. An inverter device characterized by being configured. 2. In an inverter device in which an inverter main body is directly attached to a device to be controlled and used, the device to be controlled is an electric motor having a fan cover, and the inverter main body is a motor of the electric motor. An inverter device, which is formed in a cylindrical shape having substantially the same size as a fan cover and is attached to the fan cover. 3. An inverter device directly attached to a device to be controlled for use, wherein the device to be controlled is a motor having a substantially cylindrical housing, and the inverter device is substantially cylindrical for tightening. An inverter device characterized in that the inverter device is attached to the side surface of the housing of the electric motor by the band.