Title:
MOTOR CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/053177
Kind Code:
A1
Abstract:
The purpose of the present invention is to improve magnet temperature estimation accuracy by correcting the current dependency of magnetic flux variation due to a temperature change when estimating magnet temperature. A motor control unit 10 of the present invention comprises a magnet temperature estimation unit 40 that receives a q-axis voltage command value calculated on the basis of either a motor rotational speed command value or a motor torque command value, an electrical angular speed, and d-axis current detection value and q-axis current detection value which are calculated on the basis of a current detection value and estimates the temperature of a permanent magnet. The magnet temperature estimation unit 40 comprises: a d-axis magnetic flux variation calculation unit 41 that receives the q-axis voltage command value, the electrical angular speed, the d-axis current detection value, and the q-axis current detection value and calculates a d-axis magnetic flux variation; a d-axis magnetic flux variation correction unit 42 that calculates a corrected d-axis magnetic flux variation obtained by correcting the d-axis magnetic flux variation; a magnet magnetic flux reference-value calculation unit 43 that calculates a magnet magnetic flux reference value; and a magnet temperature calculation unit 44 that calculates a magnet temperature estimation value of the permanent magnet on the basis of the corrected d-axis magnetic flux variation and the magnet magnetic flux reference value.
Inventors:
OHARA SHUNSUKE (JP)
SUZUKI TAKAHIRO (JP)
TANIGUCHI SHUN (JP)
MITSUI TOSHISADA (JP)
MATSUI HIROKAZU (JP)
SUZUKI TAKAHIRO (JP)
TANIGUCHI SHUN (JP)
MITSUI TOSHISADA (JP)
MATSUI HIROKAZU (JP)
Application Number:
PCT/JP2023/019851
Publication Date:
March 14, 2024
Filing Date:
May 29, 2023
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
H02P29/62; H02P21/06
Domestic Patent References:
| WO2019239657A1 | 2019-12-19 | |||
| WO2016125567A1 | 2016-08-11 | |||
| WO2019087454A1 | 2019-05-09 |
Foreign References:
| JP2019122188A | 2019-07-22 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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