JPH0574168U - Variable speed device built-in rotating electric machine - Google Patents

Abstract

(57) [Summary] [Purpose] A variable speed device was incorporated into the rotating electric machine for collective cooling. [Structure] By incorporating a variable speed device outside or on the outer circumference of a rotating electric machine and cooling it with a fan, or
The cooling pipe 7 is provided on the inner circumference, the inner circumference, and the outer circumference of a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a built-in structure of a variable speed device to which a semiconductor is applied and a rotating electric machine such as a motor which is a load thereof.

[0002]

[Prior art and its problems]

 Conventionally, a motor and a variable speed device of this motor, such as an element such as a transistor module or an electrolytic capacitor, are structurally independent.Since both the variable speed device and the motor are heating elements, separate cooling systems are required. I have it. In other words, having independent cooling systems is a factor that increases the overall volume of the variable speed system as a whole.

In addition, since the variable speed device often performs PWM control, it is necessary to make the output cable thicker than that handling a normal sine wave, and the iron plate around the output cable is heated by induction. Is happening.

An object of the present invention is to provide a rotary electric machine incorporating a variable speed device, which is compact in size, short in cable length, and free from heating.

[0005]

[Means for Solving the Problems]

 The structure of the present invention for achieving the above object is (1) provided with a variable speed device on the outer or outer periphery of a rotating electric machine along a concentric circle or along an axial direction, and (2) rotation. A variable speed gear is provided on the outer or outer periphery of the case of the electric machine along a concentric circle or along the axial direction, and a cooling pipe for passing the refrigerant in the axial direction is provided on the inner, inner, or outer periphery of the case. Characterize.

[0006]

[Action]

 For example, by installing the variable speed device on the outer circumference of the motor or outside the outer circumference of the motor, the cooling air of the motor itself can be used for cooling the variable speed device. By providing the cooling pipes on the outer circumference, it is possible to contribute to the cooling of the variable speed device at the same time as the cooling of the motor itself, thereby achieving downsizing and collective cooling.

[0007]

【Example】

 An embodiment of the present invention will now be described with reference to FIGS. 1 to 3 show a first embodiment, in which a motor cooling fin 2 is provided around the motor body 1 in FIG. 1, and a transistor module 3, for example, is provided in a part of the motor cooling fin 2. It is equipped. Three transistor modules 3 are provided along the circumferential direction of the motor and three along the axial direction. Therefore, the transistor module 3 can be incorporated in the motor body 1 to be downsized, and the number of cables can be reduced, so that the fan 4 of the motor body 1 can cool it all together.

FIG. 2 is a modification of the first embodiment, in which a transistor cooling heat sink 5 is provided outside the motor body 1, and this transistor cooling heat sink 5 is arranged along the circumferential direction as in FIG. Moreover, the transistor module 3 is provided along the axial direction. Cooling fins are also formed inside the transistor cooling heat sink 5, and screw fixing portions 6 are formed at several places (four places) between the heat sink 5 and the motor body 1. The transistor cooling heat sink 5 and the motor cooling fin 2 may be integrated and formed. The fan 4 of the motor body 1 passes cooling air between the transistor cooling heat sink 5 and the motor cooling fin 2.

FIG. 3 is a modification of FIG. 2, in which the transistor cooling fins in the vicinity of the transistor module 3 are long, and the motor cooling fins 2 are elongated in the other portions, so that the respective cooling effects can be obtained. I am raising.

As described above, according to the first embodiment shown in FIGS. 1 to 3, the cooling system becomes one and the system is downsized, and the length of the cable is short and the heating due to induction is reduced as much as possible. However, the cooling effect is increased.

FIGS. 4 and 5 show a second embodiment of the present invention, in which a case 1a of the motor body 1 is provided with a cooling pipe 7 for passing a refrigerant. That is, in the case where the transistor module 3 is provided on the outer circumference of the motor body 1 in the circumferential direction as shown in FIG. 4A, a spiral groove is formed on the inner or outer circumference of the case 1a of the motor body 1 shown in FIG. 4B. Is formed, and a cooling pipe 7 for passing water, for example, is arranged in the groove. In this case, the final product may have a structure in which a spiral through hole is formed inside the case 1a.

Further, a linear through hole 7 extending along the axial direction is provided inside the case 1a of the motor body 1, or a linear groove is formed on the inner circumference or the outer circumference of the case 1a, as shown in FIG. The cooling pipe 7 shown in can be formed. In the spiral or linear cooling pipe 7 shown in FIGS. 4B and 4C, the transistor module 3 is arranged in the circumferential direction on the motor end side as shown in FIG. 4A. It is preferable to flow the coolant from the side on which the transistor module 3 is attached. This is because the allowable case temperature of the transistor is lower than the allowable temperature of the transistor mounting location related to the allowable temperature of the insulating material of the motor, and it is necessary to cool the transistor most.

FIG. 5 shows an example in which the transistor modules 3 are arranged in the axial direction. In this case, as the cooling pipe 7 is provided so as to meander on the outer peripheral surface of the case 1a as shown in FIG. 5B, the transistor module 3 can also be directly cooled.

In FIGS. 4 and 5, an example in which the cooling pipe 7 is provided in the case 1a inside (FIG. 4B), inside (FIG. 4C), or outside (FIG. 5B) However, it can be applied to any of the inner, inner and outer circumferences of the case considering the structural simplicity and cooling efficiency.

Further, the cooling pipe 7 described above can be applied to FIGS. 1 to 3, and for example, a straight cooling pipe is provided inside a case having fins 2 on the outer periphery of FIG. A spiral cooling pipe can be provided, or a cooling pipe can be provided in which the fin 2 is partially cut out and meanders on the outer periphery. The case in FIGS. 2 and 3, at least one of the transistor cooling heat sinks 5, or cooling pipes may be provided between them.

[0016]

[Effect of the device]

 As described above, according to the present invention, the cooling system becomes one, the system can be downsized, the cost can be reduced, and the cable can be shortened and troubles can be reduced.

[Brief description of drawings]

FIG. 1A is a side view and FIG. 1B is a front view of an example of a first embodiment.

FIG. 2A is a side view and FIG. 2B is a front view of a modified example of the first embodiment.

FIG. 3 is a partial view of a modified example of FIG.

FIG. 4A is an external view of an example of the second embodiment and FIG.
(C) It is a structural diagram of a cooling pipe.

5 (a) is an external view of a modified example of the second embodiment, and FIG. 5 (b) is a structural diagram of a cooling pipe.

[Explanation of symbols]

 1 Motor Main Body 1a Case 2 Motor Cooling Fin 3 Transistor Module 4 Fan 5 Transistor Cooling Heat Sink 6 Screw Stop 7 Cooling Pipe

Claims (2)

[Scope of utility model registration request] 1. A rotary electric machine incorporating a variable speed device, comprising a variable speed device on the outer or outer circumference of a case of the rotary electric machine along a concentric circle or along the axial direction. 2. A variable speed device is provided outside or on the outer periphery of a case of a rotating electric machine along a concentric circumference or along an axial direction,
A rotary electric machine with a built-in variable speed device, comprising a cooling pipe for passing a refrigerant in an axial direction inside or inside or outside the case.