Title:
MOTOR DRIVE DEVICE AND AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2020/066028
Kind Code:
A1
Abstract:
A motor drive device (100) is equipped with: a booster circuit (3) for boosting AC voltage that is output from an AC power supply (1); a capacitor (4) for smoothing DC voltage that is output from the booster circuit (3); an inverter circuit (18) for converting power accumulated in the capacitor (4) to AC power and supplying the AC power to a motor; and a connection switching unit (60) for switching, by means of a switching signal, the connection state of the motor (500) windings between a star connection and a delta connection. At a first rotational speed that is the rotational speed at a switching point where switching of the connection state of the windings between the star connection and the delta connection is performed, it is possible to boost the output voltage of the booster circuit (3) to a first voltage that is higher than the output voltage of the booster circuit (3) when the booster circuit (3) is not caused to perform boost operation.
Inventors:
SHIMOMUGI TAKUYA (JP)
ARISAWA KOICHI (JP)
ICHIKI SATORU (JP)
UEMURA KEISUKE (JP)
IWAZAKI KENJI (JP)
ARISAWA KOICHI (JP)
ICHIKI SATORU (JP)
UEMURA KEISUKE (JP)
IWAZAKI KENJI (JP)
Application Number:
PCT/JP2018/036605
Publication Date:
April 02, 2020
Filing Date:
September 28, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P25/18; H02P27/06
Domestic Patent References:
| WO2018078845A1 | 2018-05-03 | |||
| WO2015045169A1 | 2015-04-02 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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