Title:
POWER CONVERSION DEVICE, MOTOR DRIVE DEVICE, AND REFRIGERATION CYCLE APPLICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/069705
Kind Code:
A1
Abstract:
A power conversion device (200) comprises: a rectifier unit (3) for rectifying a first AC power supplied from a commercial power supply (1); a smoothing capacitor (5) connected to an output end of the rectifier unit (3); an inverter (30) connected to both ends of the smoothing capacitor (5) and generating a second AC power to output the second AC power to a motor (7) for driving a load; and a control device (100) for controlling the operation of the inverter (30) to control the rotational speed of the motor (7). When the rotational speed of the motor (7) decreases, the control device (100) reduces a speed command value so that the difference between the rotational speed and the speed command value for controlling the rotational speed becomes within a specified range.
Inventors:
TOYODOME SHINYA (JP)
HATAKEYAMA KAZUNORI (JP)
SASAKI RYOICHI (JP)
ARISAWA KOICHI (JP)
HATAKEYAMA KAZUNORI (JP)
SASAKI RYOICHI (JP)
ARISAWA KOICHI (JP)
Application Number:
PCT/JP2022/035728
Publication Date:
April 04, 2024
Filing Date:
September 26, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P21/20; H02P6/08
Domestic Patent References:
| WO2007114243A1 | 2007-10-11 |
Foreign References:
| JP2010142031A | 2010-06-24 | |||
| JP2014187802A | 2014-10-02 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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