Title:
MOTOR DRIVE DEVICE AND AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2019/146037
Kind Code:
A1
Abstract:
This motor drive device (200) is provided with: a power supply generation unit (2) for converting power supplied from a commercial power supply (1) to a DC power; a motor drive control unit (7) capable of switching a modulation method for driving a motor (13) to a two-phase modulation or a three-phase modulation; an inverter output unit (6) controlled by the motor drive control unit (7) and supplying an AC power to the motor (13), said AC power being obtained by converting the DC power according to the modulation method; a temperature detection unit (10) for detecting the temperature of the inverter output unit (6) or the temperature of the motor drive control unit (7); a current detection unit (11) for detecting current supplied from the inverter output unit (6) to the motor (13); and a control unit (4) for, when the current is smaller than a current threshold value and the temperature is a first temperature threshold value or more, instructing the motor drive control unit (7) to change the modulation method from the three-phase modulation to the two-phase modulation.
Inventors:
ONO YOSHIHITO (JP)
Application Number:
PCT/JP2018/002283
Publication Date:
August 01, 2019
Filing Date:
January 25, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P27/06; H02P29/68
Foreign References:
| JP2007288858A | 2007-11-01 | |||
| JP2008109768A | 2008-05-08 | |||
| JP2015006101A | 2015-01-08 | |||
| JP2007174888A | 2007-07-05 | |||
| JP2015070672A | 2015-04-13 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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