Power converter

Patent metadata

Field	Value
Publication number	US-10404156-B2
Application number	US-201816211346-A
Country	US
Kind code	B2
Filing date	Dec 6, 2018
Priority date	Jun 6, 2014
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

The power converter includes an inverter circuit 140, a capacitor 514 for smoothing DC power, a capacitor 515 for removing noise, and conductors 564p and 564n. The conductors 564p and 564n are connected to the capacitors 514 and 515 when power side terminals 562p and 562n are connected to an inverter circuit 140, and power source side terminals 561p and 561n are connected to a battery 136. In the conductors 564p and 564n, a parasitic inductance L1 between capacitor terminals 563p and 563n and capacitor terminals 560p and 560n is larger than a parasitic inductance L2 between capacitor terminals 563p and 563n and the power side terminals 562p and 562n.

First claim

The invention claimed is:

1. A power converter comprising:
a power conversion circuit including a plurality of semiconductor switching elements;
a first capacitor configured to smooth DC power input to the power conversion circuit;
a second capacitor configured to release common mode noise to a ground; and
a conductor that electrically connects the power conversion circuit, the first capacitor, and the second capacitor,
wherein the conductor includes a first connecting portion connected to the first capacitor, a second connecting portion connected to the second capacitor, and a third connecting portion connected to the power conversion circuit, and
the conductor is formed such that a wiring distance between the first connecting portion and the second connecting portion is longer than a wiring distance between the first connecting portion and the third connecting portion.

2. The power converter according to claim 1 ,
wherein the conductor has a laminated structure, in which a positive electrode conductor member and a negative electrode conductor member are laminated via an insulating member between the third connecting portion and the first connecting portion, and
the conductor has a non-laminated structure in which the positive electrode conductor member and the negative electrode conductor member are not laminated at least at a part of between the first connecting portion and the second connecting portion.

3. The power converter according to claim 1 ,
wherein the first capacitor has a substantially rectangular parallelepiped shape having six side surfaces,
the conductor is extended along a plurality of the side surfaces, and
a length of the laminated structure portion is shorter than a length of the non-laminated structure portion in a length along the plurality of side surfaces of the conductor.

4. The power converter according to claim 1 ,
wherein, in the conductor, a conductor cross-sectional area between the first connecting portion and the second connecting portion is smaller than a conductor cross-sectional area between the third connecting portion and the first connecting portion.

5. A power converter comprising:
a power conversion circuit including a plurality of semiconductor switching elements;
a first capacitor configured to smooth DC power input to the power conversion circuit;
a second capacitor configured to release common mode noise to a ground; and
a conductor that electrically connects the power conversion circuit, the first capacitor, and the second capacitor,
wherein the conductor includes a first connecting portion connected to the first capacitor, a second connecting portion connected to the second capacitor, and a third connecting portion connected to the power conversion circuit, and
a first length of the conductor from the first connecting portion to the second connecting portion is longer than a second length of the conductor from the first connecting portion to the third connecting portion.

6. The power converter according to claim 5 ,
wherein the conductor has a laminated structure, in which a positive electrode conductor member and a negative electrode conductor member are laminated via an insulating member between the third connecting portion and the first connecting portion, and
the conductor has a non-laminated structure in which the positive electrode conductor member and the negative electrode conductor member are not laminated at least at a part of between the first connecting portion and the second connecting portion.

7. The power converter according to claim 5 ,
wherein the first capacitor has a substantially rectangular parallelepiped shape having six side surfaces,
the conductor is extended along a plurality of the side surfaces, and
a length of the laminated structure portion is shorter than a length of the non-laminated structure portion in a length along the plurality of side surfaces of the conductor.

8. The power converter according to claim 5 ,
wherein, in the conductor, a conductor cross-sectional area between the first connecting portion and the second connecting portion is smaller than a conductor cross-sectional area between the third connecting portion and the first connecting portion.

Assignees

• Hitachi Automotive Systems Ltd

Inventors

• NISHIZAWA Youhei
• Sasaki Kaname
• Okubo Yutaka
• Fujita Yuki

Classifications

• Y10S903/907

  Electricity storage, e.g. battery, capacitor · CPC title

• H02M7/53871

  with automatic control of output voltage or current · CPC title

• H02M1/44

  Circuits or arrangements for compensating for electromagnetic interference in converters or inverters · CPC title

• B60L53/20

  characterised by converters located in the vehicle · CPC title

• H02M1/14 Primary

  Arrangements for reducing ripples from DC input or output · CPC title