Title:
VELOCITY ESTIMATION DEVICE OF AC MOTOR, DRIVING DEVICE OF AC MOTOR, REFRIGERANT COMPRESSOR, AND REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/194401
Kind Code:
A1
Abstract:
The present invention comprises: a model deviation calculation unit (11) that calculates a model deviation ε on the basis of the voltage, the current, and the estimated angular velocity ω^
r of an AC motor (2); a first angular velocity estimation unit (21) that calculates a first estimated angular velocity ω^
r1 on the basis of the model deviation ε; a second angular velocity estimation unit (22) that calculates a second estimated angular velocity ω^
r2 having a frequency different from that of the first estimated angular velocity ω^
r1 on the basis of the model deviation ε; a compensation phase calculation unit (51) that calculates a compensation phase θpls on the basis of a disturbance frequency fd; and an estimated angular velocity calculation unit (23) that calculates the estimated angular velocity ω^
r of the AC motor (2) on the basis of the first estimated angular velocity ω^
r1 and the second estimated angular velocity ω^
r2. One among the first estimated angular velocity ω^
r1 and the second estimated angular velocity ω^
r2 is calculated on the basis of the compensation phase θpls.
Inventors:
TAKEDA YURIKO (JP)
TAKAHASHI KENJI (JP)
TOYODOME SHINYA (JP)
KASHIMA MITSUO (JP)
KUTSUKI TOMOHIRO (JP)
TAKAHASHI KENJI (JP)
TOYODOME SHINYA (JP)
KASHIMA MITSUO (JP)
KUTSUKI TOMOHIRO (JP)
Application Number:
PCT/JP2019/012213
Publication Date:
October 01, 2020
Filing Date:
March 22, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P21/05; H02P21/18; H02P21/24
Domestic Patent References:
| WO2017212794A1 | 2017-12-14 |
Foreign References:
| JPS6222417B2 | 1987-05-18 | |||
| JP2016032364A | 2016-03-07 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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