Title:
ELECTRIC MOTOR DRIVE DEVICE, AND REFRIGERATING AND AIR CONDITIONING DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/026061
Kind Code:
A1
Abstract:
The present invention is an electric motor drive device 100 which drives an electric motor 4 by using AC power converted from a DC power source 1, said electric motor drive device 100 being provided with: an inverter 5 that receives a pulse width modulation signal and supplies AC power to the electric motor 4; and an inverter control unit 8 that generates a pulse width modulation signal and supplies said signal to the inverter 5. The inverter control unit 8 reduces the pulse number of the pulse width modulation signal generated in a first interval of one cycle of a mechanical angle of the electric motor 4 to a level lower than the pulse number of the pulse width modulation signal generated in a second interval of one cycle of the mechanical angle of the electric motor 4. The first interval is an interval which has a load torque that is lower than the load torque of the second interval.
Inventors:
ARISAWA KOICHI (JP)
HATAKEYAMA KAZUNORI (JP)
UEMURA KEISUKE (JP)
HATAKEYAMA KAZUNORI (JP)
UEMURA KEISUKE (JP)
Application Number:
PCT/JP2015/072834
Publication Date:
February 16, 2017
Filing Date:
August 12, 2015
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P27/08
Domestic Patent References:
| WO2009028053A1 | 2009-03-05 |
Foreign References:
| JP2009278827A | 2009-11-26 | |||
| JP2015122858A | 2015-07-02 | |||
| JP2013183636A | 2013-09-12 | |||
| JP2013094015A | 2013-05-16 | |||
| JP2012165582A | 2012-08-30 | |||
| EP2448114A1 | 2012-05-02 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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