Title:
ELECTRIC MOTOR CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/243087
Kind Code:
A1
Abstract:
Provided is an electric motor control device capable of simultaneously estimating the gain error of a current detector and the parameter error of a three-phase electric motor and improving the estimation accuracies of these errors. The electric motor control device comprises: a gain error estimator that estimates the gain error of a current detector on the basis of the current detection values of a d-axis and a q-axis; and a parameter error estimator that estimates, on the basis of the estimated value of the gain error, a parameter error due to the three-phase unbalance of the electric parameters of an electric motor. The gain error estimator outputs, as gain errors, a first gain error estimated value that is estimated so as to minimize d-axis current ripple and a second gain error estimated value that is estimated so as to minimize q-axis current ripple. The parameter error estimator estimates a parameter error using the first gain error estimated value and the second gain error estimated value. The control device corrects the gain error of the current detector on the basis of the second gain error estimated value.
Inventors:
OKAMOTO TAKESHI (JP)
ENOKIJIMA HIROYUKI (JP)
MINOBE MORISHIGE (JP)
ENOKIJIMA HIROYUKI (JP)
MINOBE MORISHIGE (JP)
Application Number:
PCT/JP2022/024355
Publication Date:
December 21, 2023
Filing Date:
June 17, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P21/22
Foreign References:
| JP2011050118A | 2011-03-10 | |||
| JP2011067023A | 2011-03-31 | |||
| JP2013219988A | 2013-10-24 | |||
| JP2005110470A | 2005-04-21 |
Attorney, Agent or Firm:
TAKADA, TAKAHASHI & PARTNERS (JP)
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