Title:
ELECTRIC MOTOR CONTROL DEVICE, COMPRESSOR, AND ELECTRIC MOTOR CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2018/179410
Kind Code:
A1
Abstract:
An electric motor control device (1) has: a speed ripple component extraction unit for extracting a speed ripple component from the difference between a command angular frequency and a speed feedback angular frequency; a phase synchronization circuit (171) for generating the phase of the speed ripple component from the speed ripple component; a torque compensation value generation unit (179) for generating a torque compensation value by multiplying a value of a periodic function corresponding to said phase by a given amplitude; a speed control unit (11) for calculating a torque command value from the difference between the command angular frequency and the speed feedback angular frequency; and a current control unit (12) for controlling current to be output to an electric motor, on the basis of a compensated torque command obtained by adding the torque compensation value to the torque command value.
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Inventors:
KINOMURA HIROFUMI (JP)
Application Number:
PCT/JP2017/013801
Publication Date:
October 04, 2018
Filing Date:
March 31, 2017
Export Citation:
Assignee:
YASKAWA ELECTRIC CORP (JP)
International Classes:
H02P6/10; H02P6/28
Foreign References:
| JP2010288440A | 2010-12-24 | |||
| JP2014150604A | 2014-08-21 | |||
| JP2012100510A | 2012-05-24 | |||
| JP2012110111A | 2012-06-07 | |||
| US20140265962A1 | 2014-09-18 | |||
| US4622500A | 1986-11-11 | |||
| CN101686020A | 2010-03-31 | |||
| CN102821505A | 2012-12-12 | |||
| JP2002247878A | 2002-08-30 | |||
| JPS5914777B2 | 1984-04-06 |
Other References:
See also references of EP 3605829A4
Attorney, Agent or Firm:
HARUKA PATENT & TRADEMARK ATTORNEYS (JP)
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