Integrated electric compressor

Patent metadata

Field	Value
Publication number	US-9909578-B2
Application number	US-43959307-A
Country	US
Kind code	B2
Filing date	Sep 28, 2007
Priority date	Mar 1, 2007
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

There is provided an integrated electric compressor that can be made small in size while reducing radio noise effectively. In an inverter of the electric compressor, a snubber circuit 21 comprising a resistor R and a capacitor C is provided between input/output terminals 20 of a power source and a switching element 18 . The snubber circuit 21 is formed by surface mounting a resistive element constituting the resistor R and a capacitor element constituting the capacitor C on a power board 16 . A leakage current from a motor 19 is thus restrained and radio noise is reduced. The resistive element and the capacitor element constituting the snubber circuit 21 are preferably surface mounted on the power board 16 on the side opposite to the side on which a control circuit board is arranged.

First claim

The invention claimed is:

1. An integrated electric compressor comprising:
a compressor constituting an air conditioner;
a motor driving the compressor;
a control board controlling the operation of the motor; and
a housing accommodating the compressor, the motor, and the control board, wherein
the control board comprises:
a switching element controlling the application of a voltage to the motor from a power source to rotationally drive the motor;
a control circuit controlling the operation of the switching element; and
a snubber circuit which is provided between the power source and the switching element to reduce radio noise and consists of a resistor and a capacitor, wherein
the resistor and the capacitor constituting the snubber circuit are surface mounted on a first board, and
the snubber circuit is connected to input/output terminals of the power source.

2. The integrated electric compressor according to claim 1 , wherein the control circuit is mounted on a second board arranged so as to face to the first board with a space being provided therebetween, and
the snubber circuit is mounted on the first board on the surface opposite to the side facing the second board.

3. The integrated electric compressor according to claim 1 , wherein power wiring for applying a voltage from the power source to the first board is formed by a bus bar.

4. The integrated electric compressor according to claim 1 , wherein the integrated electric compressor is mounted on a vehicle.

Assignees

• Kasai Shigeo
• Nakano Koji
• Toyama Koji
• Hattori Makoto
• Niwa Kazuki
• Mitsubishi Heavy Ind Ltd

Inventors

• Kasai Shigeo
• Nakano Koji
• Toyama Koji
• Hattori Makoto
• Niwa Kazuki

Classifications

• H02P27/06

  using DC to AC converters or inverters (H02P27/05 takes precedence) · CPC title

• F04B35/04 Primary

  the means being electric · CPC title

• H02M7/003

  Constructional details, e.g. physical layout, assembly, wiring or busbar connections · CPC title

• F04B39/121

  Casings · CPC title

• F04B2203/0204

  Frequency of the electric current · CPC title