Title:
MOTOR CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/192450
Kind Code:
A1
Abstract:
The objective of the present invention is to provide a motor control device in which processing speed is improved by reducing the amount of calculation of a current command value. Combinations of points of intersection that are effective as current commands, among the points of intersection of two curves selected from among a maximum efficiency curve, a minimum current curve, a minimum voltage curve, a current limit circle, a voltage limit circle, and a constant torque curve, drawn on a dq-axis orthogonal coordinate plane, are obtained. Furthermore, a state transition table in which the combinations of points of intersection are arranged as a current state and a transition destination state, and in which a transition condition is set, is created, and a current command value for an electric motor 15 is generated on the basis of a positional relationship on the curves at the point of intersection corresponding to the transition destination state, when a transition from an arbitrarily defined point of intersection corresponding to the current state has occurred in accordance with the transition condition.
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Inventors:
TAKANO YUICHI (JP)
FUKUMURA TOMOHIRO (JP)
OTSU YUMA (JP)
FUKUMURA TOMOHIRO (JP)
OTSU YUMA (JP)
Application Number:
PCT/JP2020/046786
Publication Date:
September 30, 2021
Filing Date:
December 15, 2020
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
H02P21/22; H02P21/14
Foreign References:
| JP2003153600A | 2003-05-23 | |||
| JP2012055032A | 2012-03-15 | |||
| JP2014195353A | 2014-10-09 | |||
| JP2015128355A | 2015-07-09 | |||
| JP2016226270A | 2016-12-28 |
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