Electric rotating machine

Patent metadata

Field	Value
Publication number	US-9812929-B2
Application number	US-201214372493-A
Country	US
Kind code	B2
Filing date	Apr 16, 2012
Priority date	Apr 16, 2012
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

Two or more switching devices ( 36 ) and two or more lead frames ( 41, 42, 43 , and 44 ) are integrally molded by use of a molding resin ( 37 ) so that a power module ( 30 ) is formed; the power module ( 30 ) is made to adhere to a heat sink ( 32 ) via an insulating material ( 31 ); the power module ( 30 ) and the heat sink ( 32 ) are fixed to a housing ( 33 ) of the power module composite ( 23 ); the power module composite ( 23 ) is fixed to a case ( 6 ) of an electric rotating machine ( 1 ) via the housing ( 33 ).

First claim

The invention claimed is:

1. An electric rotating machine comprising:
a rotor fixed on a rotor shaft;
a stator that is disposed in such a way as to face the rotor and is provided with a stator winding;
a case that pivotably supports the rotor shaft and holds the stator; and
a control apparatus that is fixed to the case and has a power module composite provided with an electric-power conversion circuit that performs electric-power conversion between the stator winding and an external DC power source and the control apparatus having a control circuit unit that controls the electric-power conversion circuit,
wherein the electric-power conversion circuit provided in the power module composite is controlled by the control circuit unit so as to convert DC power from an external DC power source into AC power and supply the AC power to the stator winding or so as to convert AC power generated across the stator winding into DC power and supply the DC power to the DC power source,
wherein the power module composite includes a power module provided with switching devices included in the electric-power conversion circuit, a housing containing the power module, and a heat sink that is fixed to the housing and refrigerates the power module,
wherein the power module includes a first lead frame connected with a first electrode of at least one of the switching devices, a second lead frame connected with a second electrode of at least one of the switching devices, a third lead frame connected with a third electrode of at least one of the switching devices, and a molding resin for integrally molding the first lead frame, the second lead frame, and the third lead frame and for insulating the first lead frame, the second lead frame, and the third lead frame from one another,
wherein the heat sink adheres to the power module via an insulating material,
wherein the first lead frame and the second lead frame both protrude from one side face of the molding resin to the outside of the molding resin,
wherein the third lead frame protrudes from an other side face of the molding resin to the outside of the molding resin, and
wherein the one side face is provided along a first plane and the other side face is provide along a second plane different from the first plane.

2. The electric rotating machine according to claim 1 , wherein the power module composite is mounted in the electric rotating machine when the housing is fixed to the case.

3. The electric rotating machine according to claim 1 , wherein the first lead frame, the second lead frame, and the third lead frame integrally molded by use of the molding resin are arranged on the same plane in such a way as to be spaced apart from one another.

4. The electric rotating machine according to claim 1 ,
wherein the housing of the power module composite is provided with an inner space having an opening portion,
wherein the power module made to adhere to the heat sink is inserted into the inner space of the housing,
wherein the heat sink is made to adhere to the housing in such a way as to close the opening portion of the housing, and
wherein the inner space of the housing, into which the power module is inserted, is filled with a resin.

5. The electric rotating machine according to claim 1 ,
wherein the stator winding is formed of a three-phase armature winding,
wherein the electric-power conversion circuit is formed of a three-phase bridge circuit,
wherein the respective switching devices are connected with upper and lower arms for each corresponding phase of the three-phase bridge circuit, and
wherein all the switching devices of the three-phase bridge circuit are integrated in the power module.

6. The electric rotating machine according to claim 1 , wherein the insulating material is a silicon-based material.

7. The electric rotating machine according to claim 1 , further including a magnetic-field winding fixed on the rotor and a magnetic-field circuit unit including switching devices, wherein the control circuit unit performs switching control of the switching devices so that the magnetic-field circuit unit controls a magnetic-field current flowing in the magnetic-field winding.

8. The electric rotating machine according to claim 1 , wherein the switching devices of the magnetic-field circuit unit are molded by use of a molding resin.

9. The electric rotating machine according to claim 1 , wherein the first plane and the second plane are oriented parallel to one another.

10. The electric rotating machine according to claim 1 , wherein the first lead frame and the second lead frame both protrude from the one side face in a first direction, and
wherein the third lead frame protrudes from the other side face in a second direction different the first direction.

11. The electric rotating machine according to claim 10 , wherein the first direction and the second direction are opposite to one another.

Assignees

• Shirakata Yuji
• Nakajima Dai
• Fujita Masahiko
• Kato Masaki
• Mitsubishi Electric Corp

Inventors

• Shirakata Yuji
• Nakajima Dai
• Fujita Masahiko
• Kato Masaki

Classifications

• H02K11/05 Primary

  Rectifiers associated with casings, enclosures or brackets · CPC title

• H10W90/766

  between a chip and a stacked lead frame, conducting package substrate or heat sink · CPC title

• H10W90/756

  between a chip and a stacked lead frame, conducting package substrate or heat sink · CPC title

• H10W72/5363

  the connected ends being wedge-shaped · CPC title

• H10W74/00

  Encapsulations, e.g. protective coatings · CPC title