Electric device and electric supercharger

Patent metadata

Field	Value
Publication number	US-10634043-B2
Application number	US-201816031358-A
Country	US
Kind code	B2
Filing date	Jul 10, 2018
Priority date	Feb 19, 2016
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

An electric device includes a partition wall configured to partition between a motor chamber having a relatively high pressure and an inverter chamber having a relatively low pressure; an inverter, which is provided in the inverter chamber, and is configured to supply power; a motor, which is provided in the motor chamber, and is configured to operate with supply of power from the inverter; and a bus-bar device, which is mounted to the partition wall by being inserted into a partition wall through hole formed in the partition wall, and is configured to connect the inverter and the motor to each other. The bus-bar device includes a bus bar configured to connect the inverter and the motor to each other; a plate portion into which the bus bar is inserted; and a resin portion.

First claim

What is claimed is:

1. An electric device, comprising:
a partition wall configured to partition between a high-pressure space having a relatively high pressure and a low-pressure space having a relatively low pressure;
a power supply device, which is provided in one of the high-pressure space and the low-pressure space, and is configured to supply power;
an operation device, which is provided in another one of the high-pressure space and the low-pressure space, and is configured to operate with supply of power from the power supply device; and
a bus-bar device, which is mounted to the partition wall by being inserted into a partition wall through hole formed in the partition wall, and is configured to connect the power supply device and the operation device to each other,
the bus-bar device including:
a bus bar configured to connect the power supply device and the operation device to each other;
a plate portion into which the bus bar is inserted;
a resin portion, which is non-conductive, is filled between the plate portion and the bus bar, and is configured to allow the bus bar to be mounted to the plate portion; and
a thread groove, which is opened on the low-pressure space side, and is prevented from penetrating into the high-pressure space side,

the plate portion of the bus-bar device is arranged on the high-pressure space side, and
a bolt corresponding to the thread groove is arranged on the low-pressure space side over the partition wall.

2. The electric device according to claim 1 , further comprising:
a seal portion arranged between the plate portion and the partition wall.

3. The electric device according to claim 1 ,
wherein the bus bar comprises a plurality of bus bars each being inserted into the plate portion with a gap, and
wherein the resin portion is filled between the plate portion and each of the plurality of bus bars and between the plurality of bus bars, and is configured to allow the plurality of bus bars to be mounted to the plate portion.

4. The electric device according to claim 1 ,
wherein the bus-bar device further comprises an insert nut having the thread groove.

5. The electric device according to claim 4 ,
wherein the bus-bar device further comprises a cap nut arranged on the high-pressure space side with respect to the insert nut.

6. The electric device according to claim 1 ,
wherein the plate portion, the resin portion, and the thread groove are integrally formed of a non-conductive member.

7. The electric device according to claim 1 ,
wherein the power supply device comprises an inverter,
wherein the operation device comprises a motor, and
wherein the electric device comprises an electric supercharger further including a compressor impeller mounted to one end of a shaft being a rotor of the motor.

8. The electric device according to claim 7 , further comprising:
a partition portion configured to separate between the high-pressure space and a space in which the compressor impeller is provided,
wherein the partition portion has a partition through hole for allowing communication between the high-pressure space and the space in which the compressor impeller is provided.

9. An electric supercharger, comprising:
a compressor impeller;
a shaft having one end to which the compressor impeller is mounted;
a motor configured to drive the shaft to rotate;
an inverter configured to supply power to the motor;
a first space, which receives the motor, and communicates with the compressor impeller;
a second space which receives the inverter;
a partition wall, which is configured to partition between the first space and the second space, and has a partition wall through hole;
a plate portion, which is mounted to the first space side of the partition wall through hole, and has a bus-bar through hole;
a bus bar inserted into the bus-bar through hole; and
a resin portion, which is non-conductive, and is provided between the bus bar and the bus-bar through hole,
the plate portion has a thread groove which is prevented from penetrating through the plate portion, and
a bolt, which is inserted from the second space side, and the thread groove are threadedly engaged with each other.

10. The electric device according to claim 2 ,
wherein the bus bar comprises a plurality of bus bars each being inserted into the plate portion with a gap, and
wherein the resin portion is filled between the plate portion and each of the plurality of bus bars and between the plurality of bus bars, and is configured to allow the plurality of bus bars to be mounted to the plate portion.

11. The electric device according to claim 10 ,
wherein the power supply device comprises an inverter,
wherein the operation device comprises a motor, and
wherein the electric device comprises an electric supercharger further including a compressor impeller mounted to one end of a shaft being a rotor of the motor.

12. The electric device according to claim 11 , further comprising:
a partition portion configured to separate between the high-pressure space and a space in which the compressor impeller is provided,
wherein the partition portion has a partition through hole for allowing communication between the high-pressure space and the space in which the compressor impeller is provided.

13. The electric device according to claim 2 ,
wherein the power supply device comprises an inverter,
wherein the operation device comprises a motor, and
wherein the electric device comprises an electric supercharger further including a compressor impeller mounted to one end of a shaft being a rotor of the motor.

14. The electric device according to claim 13 , further comprising:
a partition portion configured to separate between the high-pressure space and a space in which the compressor impeller is provided,
wherein the partition portion has a partition through hole for allowing communication between the high-pressure space and the space in which the compressor impeller is provided.

Assignees

• Ihi Corp

Inventors

• Sasaki Yuji
• Yoshida Takashi
• Inomata Tatsumi
• Iizuka Kuniaki

Classifications

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• H02K11/30

  Structural association with control circuits or drive circuits · CPC title

• F02B39/10 Primary

  electric · CPC title

• H02B1/20

  Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards (installations of bus-bars H02G5/00) · CPC title

• H02K5/225

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