On-vehicle motor-driven compressor

Patent metadata

Field	Value
Publication number	US-10544805-B2
Application number	US-201916365982-A
Country	US
Kind code	B2
Filing date	Mar 27, 2019
Priority date	Mar 30, 2018
Publication date	Jan 28, 2020
Grant date	Jan 28, 2020

Abstract

An on-vehicle motor-driven compressor includes a compression unit, an electric motor, and an inverter device. The inverter device includes an inverter circuit and a noise reducer. The noise reducer includes a common-mode choke coil and a smoothing capacitor. The common-mode choke coil includes a case, a loop-shaped core accommodated in the case, a first winding and a second winding that are wound around the case, and a loop-shaped conductor that covers the core and the case. Parts of the conductor that are opposed to each other between the first winding and the second winding are spaced apart from each other. The case includes two projections that project from an outer surface of the case. The conductor is held by the two projections such that the conductor is spaced apart from the first winding and the second winding.

First claim

The invention claimed is:

1. An on-vehicle motor-driven compressor comprising:
a compression unit configured to compress fluid;
an electric motor configured to drive the compression unit; and
an inverter device configured to drive the electric motor, wherein
the inverter device includes
an inverter circuit configured to convert direct-current power into alternating-current power, and
a noise reducer arranged on an input side of the inverter circuit, wherein the noise reducer is configured to reduce common-mode noise and normal-mode noise contained in the direct-current power before being input to the inverter circuit,

the noise reducer includes
a common-mode choke coil, and
a smoothing capacitor, wherein the common-mode choke coil and the smoothing capacitor configure a low-pass filter circuit,

the common-mode choke coil includes
a loop-shaped case made of a plastic,
a loop-shaped core accommodated in the loop-shaped case,
a first winding wound around an outer surface of the loop-shaped case,
a second winding wound around the outer surface of the loop-shaped case, wherein the second winding is spaced apart from and opposed to the first winding, and
a loop-shaped conductor that covers the loop-shaped core and the loop-shaped case while extending over the first winding and the second winding,

parts of the loop-shaped conductor that are opposed to each other between the first winding and the second winding are spaced apart from each other,
the loop-shaped case includes two projections that project from the outer surface of the loop-shaped case, and
the loop-shaped conductor is held by the two projections such that the loop-shaped conductor is spaced apart from the first winding and the second winding.

2. The on-vehicle motor-driven compressor according to claim 1 , wherein
the loop-shaped case includes a first straight portion around which at least part of the first winding is wound and a second straight portion around which at least part of the second winding is wound, and
the first straight portion and the second straight portion extend straight in parallel to each other.

3. The on-vehicle motor-driven compressor according to claim 1 , wherein
the two projections configure a channel extending along a portion of the loop-shaped conductor, and
the portion of the loop-shaped conductor is inserted into the channel.

Assignees

• Toyota Jidoshokki Kk

Inventors

• Ambo Shunsuke
• Kagawa Fumihiro
• Nagata Yoshiki

Classifications

• H02M1/126

  using passive filters · CPC title

• B60H1/3223 Primary

  characterised by the arrangement or type of the compressor (B60H1/3222 takes precedence) · CPC title

• F04D29/601 Primary

  specially adapted for elastic fluid pumps · CPC title

• F04B39/121

  Casings · CPC title

• F04B35/04

  the means being electric · CPC title