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Title:
MOTOR DRIVE DEVICE FOR COMPRESSOR
Document Type and Number:
Japanese Patent JP2011109797
Kind Code:
A
Abstract:

To provide a motor drive device for a compressor that suppresses a regeneration phenomenon when a compressor motor in an air conditioner stops, and eliminates an increase of cost resulting from the high-pressure resistance of a smoothing capacitor.

The motor drive device for the compressor includes a phase shifting means 6 which can freely be inserted and extracted between an inverter circuit 5 and the smoothing capacitor 3. When stopping the compressor motor 20, an inverter control means 10 detects phases of a current and a voltage of a winding of the compressor motor 20, and when the phases of the current and the voltage differ from each other, the phase shifting means 6 is inserted between the inverter circuit and the smoothing capacitor. When the phases of the current and the voltage coincide with each other, a signal is generated which turns on/off an element of the inverter circuit 5 according to the direction of the current which is detected by a current detection means 4, and flows in the winding of the compressor motor 20.


Inventors:
OGURA HIROHISA
HIZUME TATSUYA
Application Number:
JP2009261662A
Publication Date:
June 02, 2011
Filing Date:
November 17, 2009
Export Citation:
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Assignee:
HITACHI APPLIANCES INC
International Classes:
H02P3/18; H02P6/24
Attorney, Agent or Firm:
ポレール特許業務法人