JPH11234954A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the temperature of electrical components from rising abnormally by mounting a plurality of second cooling fins at an outer edge part parallel to a rotor at the bottom surface of a control box so as to be diagonal to a plurality of first cooling fins. SOLUTION: A plurality of first cooling fins 16 are mounted so as to be parallel to the rotating shaft of a rotor. A plurality of second cooling fins 17 are shorter than the first cooling fins 16, and mounted at the rim of a control box 11 so as to be diagonal at an angle to the first cooling fins 16. Cooling wind from the cooling fins mounted on the side of a spacer 10 flows in a direction indicated by arrowheads 18, 19. The cooling wind 18 which flows to the outer periphery side of a motor, having rotational elements, can easily-flow between the diagonal second cooling fins 17 at the outer periphery side because the second cooling fins 17 are mounted at the outer edge part parallel to the rotating shaft at the bottom surface of the frame 1 of the control box 11 so as to be diagonal at an angle to the rotating shaft. It is thus possible to guide more cooling wind between the cooling box 11 and the frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor integrally having electric parts such as a control circuit.

[0002]

2. Description of the Related Art The structure of a conventional electric motor integrally having electric parts such as a control circuit will be described with reference to FIGS. First, in FIG. 13, the frame 1 has a cylindrical shape with both ends opened, and bearing brackets 2 and 3 are attached to both ends of the frame 1.
Are mounted with bearings 4, respectively.

[0003] A rotor 5 is housed in a frame 1. The rotor 5 is obtained by attaching a rotating shaft 5b to a rotor core 5a.
Each is supported. A stator 6 is mounted on the inner peripheral surface of the frame 1. The stator 6 is formed by winding a plurality of coils 6b around a stator core 6a, and faces the outer peripheral surface of the rotor 5 via an air gap.

A fan cover 8 is mounted on one end of the frame 1 via a plurality of spacers 7, and a cooling air passage 7 a is formed between adjacent spacers 7. A fan cover 8 is provided at one end of the rotating shaft 5b.
And a fan 9 is mounted on the rotating shaft 5b.
When the fan 9 rotates integrally, cooling air is sent to the outer peripheral surface of the frame 1 through each cooling air passage 7a.

[0005] A spacer 10 made of a heat insulating material is fixed to the outer peripheral surface of the frame 1, and a control box (box) 11 is fixed to the spacer 10. This control box 11
Is composed of a metal main body case 12 having an open upper surface and a metal lid 13 for closing the upper surface of the main body case 12. The lid 13 fastens a plurality of screws to the main body case 12. Accordingly, it is detachably attached to the main body case 12.

In the control box 11, as shown in FIG.
An inverter device 14 corresponding to an electric component is housed. The inverter device 14 has a control circuit mainly composed of a microcomputer, a stabilized DC power supply circuit, a power module (all not shown), and the like mounted on a drive circuit board 15, and has lead wires (not shown). ) Is connected to the plurality of coils 6b.

As shown in FIG. 14, a plurality of radiating fins 16 are projected from the outer surface of the main body case 12 on the side of the frame 1. Each of these radiating fins 16 is
It is parallel and linear to b.

[0008]

In the above-mentioned electric motor, the stator 6 and the rotor 5 are housed inside the frame 1 and a control box 11 is mounted on the outer surface of the frame 1 so that an electric device such as an inverter device is installed in the control box. It is considered to store parts. In the case of this configuration, if the temperature inside the control box abnormally rises, there is a possibility that the electric components may be adversely affected. Conventionally, a radiation fin 16 is provided on the outer surface of the control box 11 in order to prevent an abnormal rise in the temperature of the electric parts, so that the outer surface area of the control box 11 is increased. Cooling the electric parts in the control box 11 by cooling the outer side surface of the control box 11 by guiding it between the control box 11 and the control box 11.

However, the fan 9 controls the control box 11
Is only a part of the cooling air generated by the fan 9, and cannot be cooled by effectively utilizing the cooling air generated by the fan 9. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electric motor capable of preventing abnormal temperature rise of an electric component.

[0010]

The present invention focuses on the fact that the cooling air generated by a fan is a combination of a component parallel to the rotation axis of the electric motor and a component parallel to the rotation direction of the fan. Although the cooling air of only the component parallel to the rotation axis of the motor was taken in, the component parallel to the rotation direction of the fan in addition to the component parallel to the rotation axis of the motor was positively applied to the lower part of the control box. It is intended to lead to.

According to the first aspect of the present invention, there is provided a motor in which a stator and a rotor are accommodated, a control box which is mounted on an outer surface of the frame with a predetermined space and accommodates electric components, and a bottom surface of the control box. A plurality of linear first cooling fins provided in a direction parallel to the rotor, and an outer edge of the bottom of the control box in a direction parallel to the rotor obliquely with respect to the first cooling fin. It is characterized by having a plurality of second cooling fins provided.

According to a second aspect of the present invention, in the electric motor of the first aspect, the first cooling fin is divided in the axial direction of the rotor. According to a third aspect of the present invention, in the electric motor of the first aspect, one end of the second cooling fin projects outward from an outer edge in a direction parallel to a rotor on a bottom surface of the control box. is there.

According to a fourth aspect of the present invention, in the electric motor of the first aspect, a plurality of second cooling fins are arranged at irregular intervals in the axial direction of the rotor. It is.

According to a fifth aspect of the present invention, there is provided an electric motor including a frame in which a stator and a rotor are stored, a control box mounted in an outer surface of the frame with a predetermined space, and storing electric components; A plurality of linear first cooling fins provided on the bottom surface in a direction parallel to the rotor; and a plurality of second cooling fins provided on the bottom surface of the control box radially from the center of the bottom surface. It is characterized by having

According to a sixth aspect of the present invention, in the electric motor of the fifth aspect, the second cooling fin has a discontinuous portion. According to a seventh aspect of the present invention, in the electric motor of the fifth aspect, a third cooling fin provided between the second cooling fins is provided.

According to another aspect of the present invention, there is provided an electric motor including a frame accommodating a stator and a rotor, a control box accommodating an electric component mounted on an outer surface of the frame with a predetermined space, and a rotor for the rotor. It has a fan provided at one end for sending cooling air to a space, and a fan cover which covers the fan and has a notch on a part of a side surface, and at least a part of the bottom surface of the control box is arranged at a position facing the notch. It is characterized by having done.

A motor according to a ninth aspect of the present invention is the electric motor according to the eighth aspect, wherein a plurality of cooling fins are provided on a bottom surface of the control box in a direction perpendicular to an axis of the rotor. The electric motor according to claim 10, wherein a plurality of pin-shaped cooling fins are provided on a bottom surface of the control box in the electric motor according to claim 8.
An electric motor according to an eleventh aspect of the present invention is the electric motor according to the eighth aspect, wherein a heat pipe is provided on a bottom surface of the control box, and a plurality of cooling fins are provided on the heat pipe in a direction perpendicular to an axis of a rotor. It is characterized by the following. According to a twelfth aspect of the present invention, in the electric motor of the eighth aspect, a heat pipe for covering the fan is provided on a bottom surface of the control box.

[0018]

FIG. 1 shows a first embodiment of the present invention.
It will be described based on. In this embodiment, only the structure of the cooling fins on the bottom surface of the control box for accommodating the inverter circuit and the like will be described.
4, the description is omitted.

FIG. 1 is a view of the control box 11 as viewed from the bottom. The first cooling fins 16 are provided in parallel with the rotating shaft 5b of the rotor 5. Second cooling fin 17
As shown in the figure, the first cooling fin 16 is shorter than the first cooling fin 16, and is provided on the outer edge of the control box 11 at an angle to the first cooling fin 16. The cooling air from the cooling fan 9 provided on the spacer 10 side is indicated by an arrow 1
It flows in the directions shown in FIGS.

Since the second cooling fins 17 are provided obliquely at an angle to the rotating shaft 5b on the outer edge of the bottom surface of the control box 11 on the side of the frame 1 parallel to the rotating shaft 5b. As compared with the conventional cooling fins arranged in parallel to the rotating shaft 5b, the cooling air 18 having a swirl component toward the outer peripheral side of the motor and flowing out flows between the second cooling fins 17 slanted at the outer edge. It will be easier. Thereby, more cooling air can be led between the control box 11 and the frame 1, and the electric components in the control box 11 can be cooled more efficiently.

Next, a second embodiment of the present invention will be described with reference to FIG. In the embodiment, only the structure of the cooling fins on the bottom surface of the control box that houses the inverter circuit and the like will be described. Is omitted.

FIG. 2 is a view of the control box 11 as viewed from the bottom. The first cooling fins 20 are provided in parallel with the rotation shaft 5b of the rotor 5, but as shown in the drawing,
It is divided on the way in the direction of the rotating shaft 5b and provided in a dotted line.

As shown in the drawing, the second cooling fin 17 is provided on the outer edge of the bottom surface of the control box 11.
It is provided obliquely at an angle to 0. Space
The cooling air generated by the fan 9 on the side of the
It flows in the direction shown in FIG.

A rotating shaft 5b is provided on the bottom surface of the control box 11 on the motor side.
The first cooling fins 20 are provided in parallel with the first cooling fins 20 and cut out in the direction of the rotating shaft 5b.
The cooling air 22 flowing from between the first cooling fins 20
Since the cooling air flows into the vicinity of the center from the gap between the spaces, a smoother flow of the cooling air can be realized, and the electric components in the control box 11 can be cooled more efficiently.

Next, a third embodiment of the present invention will be described with reference to FIG. In the embodiment, only the configuration of the cooling fins on the bottom surface of the control box accommodating the inverter circuit and the like will be described, and the configurations of the electric motor and the control box are as described in FIG. 13 and FIG. Is omitted.

FIG. 3 is a view of the control box 11 as viewed from the bottom. The first cooling fins 16 are provided in parallel with the rotating shaft 5b of the electric motor 1. Second cooling fin 23
As shown in the figure, the first cooling fin 16 is shorter than the first cooling fin 16, is provided at an outer edge of the control box 11 at an angle to the first cooling fin 16, and has one end at the outer edge. It protrudes more outward. Cooling air from the fan 9 on the spacer 10 flows in the directions indicated by arrows 24 and 25.

The rotating shaft 5b on the bottom surface of the control box 11 on the motor side.
A second cooling fin 23 is provided obliquely at an angle with respect to the first cooling fin 16 at an outer edge parallel to the first cooling fin 16, and one end of the second cooling fin 23 protrudes outward from the outer edge. As a result, compared with the conventional cooling fin in which all the cooling fins are arranged in parallel to the rotating shaft 5b, the cooling air 25 having a swirl component and flowing out toward the outer peripheral side of the electric motor is discharged from the second cooling fin at an oblique outer edge. 23 easily flows. Further, since one end of the second cooling fin 23 projects outside the outer edge portion, compared to the first embodiment in which the second cooling fin does not project.
More cooling air 25 can be introduced to the bottom surface of the control box 11. This allows more cooling air to flow through the control box 1
1 and the frame motor 1 so that the electric components in the control box 11 can be cooled more efficiently.

Next, a fourth embodiment of the present invention will be described with reference to FIG. In the embodiment, only the configuration of the cooling fins on the bottom surface of the control box accommodating the inverter circuit and the like will be described, and the configurations of the electric motor and the control box are as described in FIG. 13 and FIG. Is omitted.

FIG. 4 is a view of the control box 11 as viewed from the bottom. The first cooling fins 16 are provided in parallel with the rotating shaft 5b of the electric motor 1. Second cooling fin 26
As shown in the figure, the first cooling fin 16 is shorter than the first cooling fin 16, and is provided on the outer edge of the control box 11 at an angle to the first cooling fin 16. Further, the plurality of second cooling fins 26 are not provided at equal pitches, but are provided so as to have unequal intervals as shown in the drawing. Cooling air from the fan 9 on the spacer 10 side flows in the directions indicated by arrows 27 and 28.

Since the second cooling fins 26 are provided at the outer edge of the bottom surface of the control box 11 parallel to the rotation axis 5b at an angle to the first cooling fins 16, all the cooling fins are provided. As compared with the conventional one arranged in parallel with the rotating shaft 5b, the cooling air 28 having a swirl component and flowing out toward the outer peripheral side of the electric motor is more likely to flow into the space between the second cooling fins 26 at the outer edge. As a result, more cooling air can be guided between the control box 11 and the frame 1, and the control box 11
The electric components inside can be cooled more efficiently.

Next, a fifth embodiment of the present invention will be described with reference to FIG. In the embodiment, only the configuration of the cooling fins on the bottom surface of the control box accommodating the inverter circuit and the like will be described, and the configurations of the electric motor and the control box are as described in FIG. 13 and FIG. Is omitted.

FIG. 5 is a view of the control box 11 as viewed from the bottom. The first cooling fin 30 is provided on the rotating shaft 5 b of the frame 1.
Are provided in parallel to Second cooling fin 29
Are provided radially around the center of the bottom surface as shown in the figure. Cooling air from the cooling fan 9 flows to the spacer 10 in the directions indicated by arrows 31 and 32.

Since the second cooling fins 29 are provided radially, the flow of the cooling air flows depending on the number of rotations and the size of the fan 9 as compared with the case where cooling fins parallel to the rotating shaft 5b are provided. Even if the turning angle is different, control box 1
1 can guide cooling air to the bottom. Thereby, the electric components in the control box 11 can be cooled more efficiently.

Next, a sixth embodiment of the present invention will be described with reference to FIG. In the embodiment, only the configuration of the cooling fins on the bottom surface of the control box accommodating the inverter circuit and the like will be described, and the configurations of the electric motor and the control box are as described in FIG. 13 and FIG. Is omitted.

FIG. 6 is a view of the control box 11 as viewed from the bottom. The first cooling fin 30 is provided on the rotating shaft 5 b of the frame 1.
Are provided in parallel to Second cooling fin 33
Are provided discontinuously and radially as shown in the figure. The cooling air from the fan 9 on the spacer 10 side is
It flows in the directions indicated by arrows 34 and 35.

By providing the second cooling fins 33 radially with discontinuous portions, the same effects as in the fifth embodiment can be obtained, and a smoother flow of cooling air can be realized through the discontinuous portions. Thus, the electric components in the control box 11 can be cooled more efficiently.

Next, a seventh embodiment of the present invention will be described with reference to FIG. In the embodiment, only the configuration of the cooling fins on the bottom surface of the control box accommodating the inverter circuit and the like will be described, and the configurations of the electric motor and the control box are as described in FIG. 13 and FIG. Is omitted.

FIG. 7 is a view of the control box 11 as viewed from the bottom. The first cooling fin 30 is provided on the rotating shaft 5 b of the frame 1.
Are provided in parallel to Second cooling fin 33
Are provided discontinuously and radially as shown in the figure. Further, third cooling fins 36 are provided between the second cooling fins 33 and at positions corresponding to discontinuous portions of the second cooling fins 33. Cooling air from the fan 9 on the spacer 10 flows in the directions indicated by arrows 37 and 38.

Since the second cooling fins 33 are provided radially with discontinuous portions and the third cooling fins 36 are provided between the second cooling fins, the same effect as in the fifth embodiment can be obtained. And a smoother flow of cooling air can be realized through the discontinuous portion, and the electric components in the control box 11 can be cooled more efficiently.

Next, an eighth embodiment of the present invention will be described with reference to FIG. In FIG. 8, the same components as those shown in FIG. 13 are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, the control box 11 for storing the electric parts 14 and the like
However, as shown in the figure, they are arranged so as to protrude from the bearing bracket 3 toward the fan 9. Further, a notch 40 is provided in a portion of the fan cover 39 corresponding to the control box 11, so that the cooling air from the fan 9 directly hits the bottom surface of the control box 11. Therefore, the cooling air from the fan 9 flows between the control box 11 and the frame 1 and also flows on the bottom surface of the control box 11. Therefore, according to the configuration of this embodiment, the cooling air is directly supplied to the bottom surface of the control box 11 as compared with the case where the control box 11 is cooled by simply flowing the cooling air between the control box 11 and the frame 1. , The cooling efficiency can be further improved.

Next, a ninth embodiment of the present invention will be described with reference to FIG. In FIG. 9, the same components as those shown in FIG. 8 are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, the control box 11 for storing the electric parts 14 and the like
However, as shown in the figure, they are arranged so as to protrude from the bearing bracket 3 toward the fan 9. Further, a notch 40 is provided in a portion of the fan cover 39 corresponding to the control box 11, so that the cooling air from the fan 9 directly hits the bottom surface of the control box 11. Further, the control box 11
Are provided with a plurality of cooling fins 41 in a direction perpendicular to the rotating shaft 5b. Therefore, the cooling air from the fan 9 flows between the control box 11 and the frame 1 and also flows on the bottom surface of the control box 11. Therefore, the cooling air is simply flowed between the control box 11 and the frame 1 so that the control box 11
According to the configuration of the present embodiment, the cooling air is directly applied to the bottom surface of the control box 11, so that the cooling efficiency can be further improved as compared with the configuration of cooling the control box 11. Further, since the cooling fins 41 are provided on the bottom surface of the control box 11, the surface area of the bottom surface can be increased, and more efficient cooling can be realized as compared with the eighth embodiment.

Next, a tenth embodiment of the present invention will be described with reference to FIG. In FIG. 10, the same components as those shown in FIG. 8 are denoted by the same reference numerals, and description thereof will be omitted.
In the present embodiment, the control box 11 for housing the electric components 14 and the like is arranged so as to protrude from the bearing bracket 3 toward the fan 9 as shown in the drawing. Further, a notch 4 is formed in a portion of the fan cover 39 corresponding to the control box 11.
0 is provided, and the cooling air from the fan 9 is directly supplied to the control box 1.
1 so as to hit the bottom surface. Further, a pin-shaped cooling fin 42 is provided on the bottom surface of the control box 11. Therefore, the cooling air from the fan 9 flows between the control box 11 and the frame 1 and also flows on the bottom surface of the control box 11. Therefore, according to the configuration of this embodiment, the cooling air is directly supplied to the bottom of the control , The cooling efficiency can be further improved. Further, the cooling fins 4 are provided on the bottom of the control box 11.
2, the surface area of the bottom surface can be increased, and more efficient cooling can be realized as compared with the eighth embodiment.

Next, an eleventh embodiment of the present invention will be described with reference to FIG. In FIG. 11, the same components as those shown in FIG. 9 are denoted by the same reference numerals, and description thereof will be omitted.
In the present embodiment, the control box 11 for housing the electric components 14 and the like is arranged so as to protrude from the bearing bracket 3 toward the fan 9 as shown in the drawing. Further, a notch 4 is formed in a portion of the fan cover 39 corresponding to the control box 11.
0 is provided, and the cooling air from the fan 9 is directly supplied to the control box 1.
1 so as to hit the bottom surface. Further, a plate-shaped heat pipe 43 is provided on the bottom surface of the control box 11 in parallel with the rotating shaft 5b, and a plurality of cooling fins 44 are perpendicular to the rotating shaft 5b on the heat pipe 43. Direction. Therefore, the cooling air generated by the fan 9 flows between the control box 11 and the frame 1 while the control box 1
It flows on the bottom surface of 1. Heat generation in the control box 11
The top pipe 43 can transport the cooling fins 44 with almost no temperature gradient. Therefore, according to the configuration of the present embodiment, the cooling air is directly supplied to the control box 1 in comparison with the case where the control box 11 is cooled by simply flowing the cooling air between the control box 11 and the frame 1.
The cooling efficiency can be further improved because of contact with the bottom surface of the first.

Next, a twelfth embodiment of the present invention will be described with reference to FIG. In FIG. 12, the same components as those shown in FIG. 9 are denoted by the same reference numerals, and description thereof will be omitted.
In the present embodiment, the control box 11 for housing the electric components 14 and the like is arranged so as to protrude toward the fan 9 from the bearing bracket 3. Further, a notch 40 is provided in a portion of the fan cover 39 corresponding to the control box 11, so that the fan 9
Of the control box 11 directly hits the bottom surface of the control box 11. Further, a plate-shaped heat pipe 45 is provided on the bottom surface of the control box 11 so as to surround the fan 9. Therefore, the cooling air from the fan 9 is supplied to the control box 1
1 and the frame 1 and at the same time, it strikes the bottom surface of the control box 11 and flows. Therefore, according to the configuration of this embodiment, the cooling air is directly supplied to the bottom surface of the control box 11 as compared with the case where the control box 11 is cooled by simply flowing the cooling air between the control box 11 and the frame 1. , The cooling efficiency can be further improved.

[0045]

As is apparent from the above description, the electric motor of the present invention has the following effects. According to the first aspect of the present invention, the second cooling fins are provided obliquely at an angle to the rotation axis on the outer edge parallel to the rotation axis on the bottom surface of the control box on the motor side. As compared with the conventional cooling fins in which all the cooling fins are arranged in parallel to the rotation axis, the cooling air having a swirl component toward the outer peripheral side of the motor and flowing out tends to flow between the second cooling fins on the outer edge. Become. Thereby, more cooling air can be guided between the control box and the electric motor, and electric components in the control box can be cooled more efficiently.

According to the second aspect of the present invention, the first cooling fin, which is parallel to the rotating shaft and is cut off in the direction of the rotating shaft, is provided on the bottom surface of the control box on the side of the electric motor. Since the cooling air flowing from between the cooling fins flows from the gap between the first cooling fins to the vicinity of the central portion, a smoother flow of the cooling air can be realized, and the electric components in the control box are more efficiently cooled. be able to.

According to the third aspect of the present invention, the second cooling fins are provided obliquely at an angle with respect to the first cooling fins on the outer edge of the bottom surface of the control box on the motor side parallel to the rotation axis. In addition, since one end of the second cooling fin projects outward from the outer edge, the second cooling fin is turned toward the outer peripheral side of the motor as compared with the conventional cooling fin in which all the cooling fins are arranged parallel to the rotation axis. The cooling air having the components and flowing out easily flows between the second cooling fins on the outer edge. Furthermore, since one end of the second cooling fin projects outside the outer edge, more cooling air can be introduced into the bottom surface of the control box than in the first aspect of the invention, which does not project. . Thereby, more cooling air can be guided between the control box and the electric motor, and electric components in the control box can be cooled more efficiently.

According to the fourth aspect of the present invention, the second cooling fins are formed obliquely at an angle to the first cooling fins on the outer edge of the bottom surface of the control box on the motor side parallel to the rotation axis. As compared with the conventional cooling fins in which all the cooling fins are arranged in parallel to the rotation axis, the cooling air having a swirl component toward the outer peripheral side of the electric motor and flowing out between the second cooling fins on the outer edge is inclined. Easier to flow into Thereby, more cooling air can be guided between the control box and the electric motor, and electric components in the control box can be cooled more efficiently.

According to the fifth aspect of the present invention, since the second cooling fins are provided radially, the number of rotations of the fan and the number of rotations of the fan are increased as compared with the case where cooling fins parallel to the rotation axis are provided. Even if the turning angle of the flow of the cooling air differs depending on the cooling air, the cooling air can be reliably guided to the bottom of the control box. Thereby, the electric components in the control box can be cooled more efficiently.

According to the sixth aspect of the present invention, the second cooling fin is provided radially with a discontinuous portion, so that the same effect as that of the fifth aspect of the present invention can be obtained. Through this, a smoother flow of cooling air can be realized, and electric components in the control box can be cooled more efficiently.

According to the means of claim 7, the second cooling fins are provided radially with discontinuous portions, and the third cooling fins are provided between the second cooling fins. In addition to providing the same effect as the fifth aspect of the invention, a smoother flow of the cooling air can be realized through the discontinuous portion, and the electric components in the control box can be cooled more efficiently.

According to the means of the eighth to twelfth aspects, the configuration according to the present invention is more advantageous than that in which the control box is cooled simply by flowing cooling air between the control box and the electric motor. In this case, since the cooling air is directly applied to the bottom surface of the control box, the cooling efficiency can be further improved.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of the present invention (a view from the bottom of a control box).

FIG. 2 is a view showing a second embodiment of the present invention (a view from the bottom of the control box).

FIG. 3 is a view showing a third embodiment of the present invention (a view from the bottom of the control box).

FIG. 4 is a view showing a fourth embodiment of the present invention (a view from the bottom of the control box).

FIG. 5 is a view showing a fifth embodiment of the present invention (a view from the bottom of the control box).

FIG. 6 is a view showing a sixth embodiment of the present invention (a view from the bottom of the control box).

FIG. 7 is a view showing a seventh embodiment of the present invention (a view from the bottom of the control box).

FIG. 8 is a view showing an eighth embodiment of the present invention (a cross-sectional view showing the entire configuration of the electric motor).

FIG. 9 is a view showing a ninth embodiment of the present invention (a cross-sectional view showing the entire configuration of the electric motor).

FIG. 10 is a view showing a tenth embodiment of the present invention (a cross-sectional view showing an entire configuration of an electric motor).

FIG. 11 is a view showing an eleventh embodiment of the present invention (a cross-sectional view showing an entire configuration of an electric motor).

FIG. 12 is a view showing a twelfth embodiment of the present invention (a view as seen in the direction of the rotation axis of the electric motor).

FIG. 13 is a sectional view showing the entire configuration of a conventional electric motor.

FIG. 14 is a view showing the control box shown in FIG. 13 from the bottom.

[Explanation of symbols]

1 is a frame, 5 is a rotor, 6 is a stator, 11 is a control box, 12 is a main body case, 13 is a lid, 14 is an inverter device (electric part), 16 is a first cooling fin,
3, 26, 29, 30, 33 are second cooling fins, 36
Denotes a third cooling fin, 39 denotes a fan cover, and 40 denotes a notch.

Claims (12)

[Claims] 1. A frame in which a stator and a rotor are housed, a control box which is mounted on an outer surface of the frame with a predetermined space and houses electric components, and is provided on a bottom surface of the control box. A plurality of linear first cooling fins provided in a direction parallel to the rotor; and an outer edge of a bottom surface of the control box in a direction parallel to the rotor, slanted with respect to the first cooling fins. An electric motor having a plurality of second cooling fins provided. 2. The cooling fan according to claim 1, wherein the first cooling fin is divided in the axial direction of the rotor.
An electric motor as described. 3. An electric motor according to claim 1, wherein one end of said second cooling fin projects outside an outer edge of a bottom surface of said control box in a direction parallel to said rotor. 4. The method according to claim 1, wherein the plurality of second cooling fins are provided in the row.
2. The electric motor according to claim 1, wherein the motors are arranged at irregular intervals in the axial direction of the motor. 5. A frame in which a stator and a rotor are housed, a control box which is mounted on an outer surface of the frame with a predetermined space and houses electric components, and a control box which is provided on a bottom surface of the control box. An electric motor comprising: a plurality of linear first cooling fins provided in a direction parallel to a rotor; and a plurality of second cooling fins provided on a bottom surface of the control box radially from a center of the bottom surface. 6. The electric motor according to claim 5, wherein the second cooling fin has a discontinuous portion. 7. The electric motor according to claim 6, further comprising a third cooling fin provided between said second cooling fins. 8. A frame in which a stator and a rotor are housed, a control box in which electric components are housed with a predetermined space mounted on an outer surface of the frame, and a control box provided at one end of the rotor. A fan that sends cooling air to the space; and a fan cover that covers the fan and has a notch on a part of a side surface, and at least a part of a bottom surface of the control box is disposed at a position facing the notch. Motor. 9. An electric motor according to claim 8, wherein a plurality of cooling fins are provided on a bottom surface of said control box in a direction perpendicular to an axis of said rotor. 10. The electric motor according to claim 8, wherein a plurality of pin-shaped cooling fins are provided on a bottom surface of the control box. 11. A heat pipe is provided on a bottom surface of the control box, and a plurality of cooling fins are provided on the heat pipe in a direction perpendicular to an axis of the rotor. Electric motor. 12. The electric motor according to claim 8, wherein a heat pipe that covers the fan is provided on a bottom surface of the control box.