Rotating electrical machine including a refrigerant passage

Patent metadata

Field	Value
Publication number	US-11552525-B2
Application number	US-202016896321-A
Country	US
Kind code	B2
Filing date	Jun 9, 2020
Priority date	Jan 20, 2020
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

A rotating electrical machine such that a power supply unit can be efficiently cooled, with no increase in size in an axial direction of the rotating electrical machine, is provided. A rotating electrical machine main body and a power supply unit are integrally fixed, and a refrigerant passage is provided on the rotating electrical machine main body side of a metal frame configuring the power supply unit. The refrigerant passage and a control part that controls power supplied to the rotating electrical machine main body are disposed in the same plane in an axial direction of the rotating electrical machine main body, and the refrigerant passage is disposed farther to a radial direction outer side of the rotating electrical machine main body than the control part.

First claim

What is claimed is:

1. A rotating electrical machine comprising:
a rotating electrical machine main body; and
a power supply unit, wherein
the rotating electrical machine main body and the power supply unit are integrally fixed by being disposed in parallel in an axial direction of the rotating electrical machine main body,
the rotating electrical machine main body includes
a stator fixed to a housing,
a rotor fixed to a rotor shaft supported so as to rotate freely by the housing, and
a cooling fan that rotates together with the rotor, causes a cooling air to be suctioned into an interior of the housing from an intake port provided in the housing and opening in the axial direction, and causes the cooling air to be discharged to an exterior of the housing from an exhaust port provided in the housing,
the power supply unit includes
a power circuit unit including a power semiconductor module that controls power supplied to the rotating electrical machine main body and a control part that controls power supplied to the rotating electrical machine main body,
a control substrate including a control circuit unit that controls the power circuit unit, and
a metal frame on which the power circuit unit and the control substrate are mounted, and in which a refrigerant passage along which a refrigerant is caused to flow is provided, and
the refrigerant passage is provided on the rotating electrical machine main body side of the metal frame, and is disposed on the outer side of the control part in a radial direction of the rotating electrical machine main body, and the refrigerant passage is disposed in the same plane as the control part in the axial direction,
wherein a projecting portion is formed in the refrigerant passage and protrudes from the rotating electrical machine main body side to the power supply unit side in the axial direction.

2. The rotating electrical machine according to claim 1 , wherein a constituent member of the rotating electrical machine main body is disposed in an outer side depressed portion coinciding with the projecting portion.

3. The rotating electrical machine according to claim 2 , wherein the projecting portion is tapered or of an arc form.

4. The rotating electrical machine according to claim 1 , wherein the refrigerant passage, the power semiconductor module, and the control substrate are disposed sequentially in the axial direction from the rotating electrical machine main body.

5. The rotating electrical machine according to claim 1 , wherein an inlet/outlet portion of the refrigerant passage is disposed in the radial direction of the rotating electrical machine main body.

6. The rotating electrical machine according to claim 1 , wherein an inlet side and an outlet side of the refrigerant passage are disposed in opposite radial directions of the rotating electrical machine main body.

7. The rotating electrical machine according to claim 1 , including a multiple of the power semiconductor module, wherein the multiple of the power semiconductor module is disposed in a U-shape, and the refrigerant passage is disposed so as to coincide with the multiple of the power semiconductor module.

8. The rotating electrical machine according to claim 1 , including a field circuit module that configures a field circuit unit of the rotating electrical machine, wherein the field circuit module is disposed farther to a downstream side of the refrigerant passage than the power semiconductor module.

9. The rotating electrical machine according to claim 1 , wherein the control substrate or a heat generating part mounted on the control substrate is disposed in a U-shape, and the refrigerant passage is disposed so as to coincide with the control substrate or the heat generating part.

10. The rotating electrical machine according to claim 1 , wherein a terminal provided in the power semiconductor module is connected to the metal frame.

11. The rotating electrical machine according to claim 1 , configured so that the cooling air suctioned into the intake port passes only in the axial direction.

12. The rotating electrical machine according to claim 1 , including a positive electrode side conductor that connects a positive electrode side terminal of the power supply unit and a positive electrode side terminal of the power semiconductor module, wherein the positive electrode side conductor and the metal frame are disposed in parallel.

13. The rotating electrical machine according to claim 1 , wherein the control part is at least one of a rotation sensor that detects a rotation of the rotating electrical machine, a brush that supplies power to the rotor, and an input filter that restricts noise.

14. The rotating electrical machine according to claim 13 , including a member that fills a gap between the refrigerant passage and the rotating electrical machine main body, wherein either or both of the input filter and a wiring member mounted on a rear bracket configuring the housing are disposed between the member filling the gap and the metal frame or the rotating electrical machine main body.

15. The rotating electrical machine according to claim 1 , including a member that fills a gap between the refrigerant passage and the rotating electrical machine main body.

16. The rotating electrical machine according to claim 1 , wherein the control part is mounted on the metal frame.

17. The rotating electrical machine according to claim 16 , wherein the control part includes a smoothing capacitor that smooths a current flowing into a stator winding included in the stator and an input filter that restricts noise, and the smoothing capacitor and the input filter are disposed so as to sandwich the metal frame.

18. The rotating electrical machine according to claim 1 , wherein the metal frame is configured of a porous metal.

Assignees

• Mitsubishi Electric Corp

Inventors

• Tahara Jun
• Hashiba Takashi
• Mitsunaga Satoshi
• Higashino Hiroyuki
• Ishizaki Mitsunori
• Kashihara Toshiaki
• Murakami Tadashi
• Utsumi Yoshinobu

Classifications

• H02K5/225 Primary

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title

• H02K2211/03

  Machines characterised by circuit boards, e.g. pcb · CPC title

• H02M7/5387

  in a bridge configuration · CPC title

• H02K9/06 Primary

  with fans or impellers driven by the machine shaft · CPC title

• H02K11/33

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title