Title:
POWER CONVERSION DEVICE, POWER CONVERSION METHOD, AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/090524
Kind Code:
A1
Abstract:
The power conversion device 1 is provided with: a power conversion circuit 10 for generating the drive power for an electric motor 3; a command generation unit 111 for calculating a voltage command on the basis of a frequency command, an output current from the power conversion circuit 10 to the electric motor 3, and an estimated value of the inductance of the electric motor 3; an error calculation unit 115 for calculating a phase error on the basis of the voltage command, the output current from the power conversion circuit 10 to the electric motor 3, and the estimated value of the inductance; a command correction unit 116 for correcting the phase of the voltage command on the basis of the phase error; and a PWM control unit 117 for controlling the power conversion circuit 10 so as to cause the drive power to follow the voltage command, the phase of which is corrected by the command correction unit 116.
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Inventors:
SATO SADAYUKI (JP)
IURA HIDEAKI (JP)
YAMAZAKI AKIRA (JP)
IURA HIDEAKI (JP)
YAMAZAKI AKIRA (JP)
Application Number:
PCT/JP2020/018339
Publication Date:
May 14, 2021
Filing Date:
April 30, 2020
Export Citation:
Assignee:
YASKAWA ELECTRIC CORP (JP)
International Classes:
H02P21/16; H02M7/48; H02P21/26
Domestic Patent References:
| WO2019092777A1 | 2019-05-16 |
Foreign References:
| JP2009291072A | 2009-12-10 | |||
| JP2010088238A | 2010-04-15 | |||
| US20190190414A1 | 2019-06-20 | |||
| JP2012228100A | 2012-11-15 | |||
| JP4228651B2 | 2009-02-25 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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