Drive unit integrated rotating electrical machine

Patent metadata

Field	Value
Publication number	US-9577488-B2
Application number	US-201114001922-A
Country	US
Kind code	B2
Filing date	May 20, 2011
Priority date	May 20, 2011
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

Problem
To obtain a drive unit integrated rotating electrical machine that makes it easier to connect power circuits and achieves not only excellent vibration resistance but also excellent heat releasing properties.
Means for Solution
A drive unit integrated rotating electrical machine has a motor, a drive unit driving the motor under control and provided with power switching elements and conductors passing a current to the power switching elements, and a heat sink cooling the drive unit, which are combined into one unit. The drive unit integrated rotating electrical machine is characterized in that: the power switching elements are molded and formed into mold modules in a state in which terminals thereof are exposed; the conductors are insert-molded in a frame in a state in which terminals thereof are exposed; and the exposed terminals of the mold modules are connected to the exposed terminals of the insert-molded conductors and the mold modules are firmly fixed to the heat sink.

First claim

The invention claimed is:

1. A drive unit integrated rotating electrical machine including a motor, a drive unit driving the motor under control and provided with power switching elements, and a heat sink cooling the drive unit, which are combined into one unit, the drive unit integrated rotating electrical machine being characterized in that:
the power switching elements are molded and formed into mold modules in a state in which terminals thereof are exposed;
the mold modules are firmly fixed to the heat sink;
conductors passing a current to the power switching elements are insert-molded in a frame in a state in which terminals thereof are exposed;
the exposed terminals of the power switching elements are connected to the exposed terminals of the conductors; and
the mold modules themselves with the power switching elements molded therein are pressed against the heat sink by pressing due to the frame.

2. The drive unit integrated rotating electrical machine according to claim 1 , characterized in that:
the mold modules are firmly fixed to the heat sink with resin.

3. The drive unit integrated rotating electrical machine according to claim 2 , characterized in that:
a clearance is formed between the mold modules and the heat sink and the resin is present in the clearance.

4. The drive unit integrated rotating electrical machine according to claim 3 , characterized in that:
protruding portions that form the clearance are provided to heat sink attachment surfaces of the mold modules.

5. The drive unit integrated rotating electrical machine according to claim 3 , characterized in that:
elastic members elastically pressing the mold modules against the heat sink are provided between the mold modules and the frame.

6. The drive unit integrated rotating electrical machine according to claim 3 , characterized in that:
protruding portions pressing the mold modules on the frame against the heat sink are provided.

7. The drive unit integrated rotating electrical machine according to claim 3 , characterized in that:
electrodes of the mold modules are exposed on a side of a heat sink attachment surface.

8. The drive unit integrated rotating electrical machine according to claim 3 , characterized in that:
the resin is hardening resin.

9. The drive unit integrated rotating electrical machine according to claim 3 , characterized in that:
an insulating layer is provided to a mold module attachment surface of the heat sink.

10. The drive unit integrated rotating electrical machine according to claim 2 , characterized in that:
the resin includes fillers therein.

11. The drive unit integrated rotating electrical machine according to claim 2 , characterized in that:
the resin includes fillers therein.

12. The drive unit integrated rotating electrical machine according to claim 11 , characterized in that:
elastic members elastically pressing the mold modules against the heat sink are provided between the mold modules and the frame.

13. The drive unit integrated rotating electrical machine according to claim 11 , characterized in that:
protruding portions pressing the mold modules on the frame against the heat sink are provided.

14. The drive unit integrated rotating electrical machine according to claim 13 , characterized in that:
electrodes of the mold modules are exposed on a side of a heat sink attachment surface.

15. The drive unit integrated rotating electrical machine according to claim 14 , characterized in that:
the resin is hardening resin.

16. The drive unit integrated rotating electrical machine according to claim 15 , characterized in that:
the resin overflows from outer peripheries of the mold modules.

17. The drive unit integrated rotating electrical machine according to claim 16 , characterized in that:
a motor part and a drive unit part are combined sequentially from a speed reducer attachment side so as to form a coaxial integral structure.

18. The drive unit integrated rotating electrical machine according to claim 16 , characterized in that:
a drive unit part and a motor part are combined sequentially from a speed reducer attachment side so as to form a coaxial integral structure.

19. The drive unit integrated rotating electrical machine according to claim 13 , characterized in that:
an insulating layer is provided to a mold module attachment surface of the heat sink.

20. The drive unit integrated rotating electrical machine according to claim 2 , characterized in that:
the resin overflows from outer peripheries of the mold modules.

21. The drive unit integrated rotating electrical machine according to claim 1 , characterized in that:
an insulating plate is provided between the mold modules and the heat sink.

22. The drive unit integrated rotating electrical machine according to claim 1 , characterized in that:
a motor part and a drive unit part are combined sequentially from a speed reducer attachment side so as to form a coaxial integral structure.

23. The drive unit integrated rotating electrical machine according to claim 1 , characterized in that:
a drive unit part and a motor part are combined sequentially from a speed reducer attachment side so as to form a coaxial integral structure.

Assignees

• Sonoda Isao
• Asao Yoshihito
• Watanabe Mamoru
• Omae Katsuhiko
• Watanabe Tetsushi
• Mitsubishi Electric Corp

Inventors

• Sonoda Isao
• Asao Yoshihito
• Watanabe Mamoru
• Omae Katsuhiko
• Watanabe Tetsushi

Classifications

• H02K5/225 Primary

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

• H02K11/33

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

• H02K7/1166

  comprising worm and worm-wheel (structural association with bearings specially adapted for worm gear drives H02K7/081) · CPC title

• H02K11/30

  Structural association with control circuits or drive circuits · CPC title

• H02K7/116

  with gears · CPC title