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Patent Searching and Data


Title:
MOTOR DRIVE DEVICE, AND HEAT PUMP APPARATUS AND REFRIGERATION/AIR-CONDITIONING APPARATUS USING MOTOR DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/016901
Kind Code:
A1
Abstract:
A motor drive device (30) is used for driving a motor (3) and is provided with an inverter (2) that applies AC voltage to the motor (3). At the time of starting operation, the inverter (2) operates switching elements of the inverter (2) with a first PWM signal obtained through PWM modulation performed at a carrier frequency that is a first integer multiple of the frequency of the AC voltage, and thereafter operates the switching elements with a second PWM signal obtained through PWM modulation performed at a carrier frequency that is a second integer multiple of the frequency of the AC voltage. Note that the second integer is less than the first integer.

Inventors:
HATAKEYAMA KAZUNORI (JP)
UEMURA KEISUKE (JP)
SHINOMOTO YOSUKE (JP)
ARISAWA KOICHI (JP)
Application Number:
JP2017/026148
Publication Date:
January 24, 2019
Filing Date:
July 19, 2017
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P27/08
Domestic Patent References:
WO2017037791A12017-03-09
WO2017077599A12017-05-11
Foreign References:
JPS60174088A1985-09-07
JP2014027764A2014-02-06
JP2004289985A2004-10-14
JP2009055693A2009-03-12
Other References:
See also references of EP 3657669A4
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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