US 12,292,217 B2
Motor-driven compressor
Shun Ito, Kariya (JP); Yoshiki Nagata, Kariya (JP); Takashi Kawashima, Kariya (JP); Hiroshi Fukasaku, Kariya (JP); Shunsuke Ambo, Kariya (JP); and Kazuhiro Shiraishi, Kariya (JP)
Assigned to KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya (JP)
Filed by KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya (JP)
Filed on Mar. 8, 2024, as Appl. No. 18/599,842.
Claims priority of application No. 2023-039643 (JP), filed on Mar. 14, 2023; and application No. 2023-110987 (JP), filed on Jul. 5, 2023.
Prior Publication US 2024/0310088 A1, Sep. 19, 2024
Int. Cl. H02K 11/33 (2016.01); F04C 18/02 (2006.01); F04C 29/06 (2006.01); F25B 31/02 (2006.01); H02K 7/14 (2006.01)
CPC F25B 31/026 (2013.01) [F04C 18/0215 (2013.01); F04C 29/06 (2013.01); H02K 7/14 (2013.01); H02K 11/33 (2016.01); F04C 2240/40 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A motor-driven compressor, comprising:
a compression unit that is configured to compress a fluid;
a motor that is configured to drive the compression unit;
an inverter device configured to drive the motor; and
a housing that accommodates the compression unit, the motor, and the inverter device, wherein
the inverter device includes:
an inverter circuit unit configured to convert DC power to AC power; and
a noise reducing unit that is provided on an input side of the inverter circuit unit and is configured to reduce common-mode noise and normal-mode noise,
the noise reducing unit includes:
a common mode choke coil that is configured to reduce the common-mode noise;
a smoothing capacitor that forms a low-pass filter together with the common mode choke coil; and
a first damping portion that is made of a nonmagnetic material and is configured to reduce the normal-mode noise,
the common mode choke coil includes:
an annular core;
a first winding that is wound around the core; and
a second winding that is wound around the core and spaced apart from the first winding,
the first damping portion is configured to surround the first winding and the second winding,
the first damping portion is configured such that an induced current flows in the first damping portion to generate magnetic flux that resists changes in leakage flux leaking from the core,
the noise reducing unit further includes a second damping portion that is made of a magnetic material and is configured to reduce the normal-mode noise, and
the second damping portion is disposed on an opposite side of the first damping portion from the common mode choke coil.