Title:
MOTOR CONTROL DEVICE AND MOTOR CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2024/062936
Kind Code:
A1
Abstract:
The present invention rotates a rotor of an electric motor by sequentially switching between energization modes that designate, from among the three phases of the electric motor, two phases in which a pulse voltage is applied. The pulse voltage alternately generates first pulses for rotating the rotor in one direction and second pulses for rotating the rotor in the reverse direction, the second pulses having a polarity opposite to that of the first pulses. The energization modes are switched to one direction or the reverse direction on the basis of the comparison between a first threshold value and the value of a first open phase voltage resulting from the application of the first pulses and the comparison between a second threshold value and the value of a second open phase voltage resulting from the application of the second pulses. When switching to the reverse direction, the first threshold value is set on the basis of the value of the first open phase voltage and the first initial threshold value preset for each energization mode. When switching to the one direction, the second threshold value is set on the basis of the value of the second open phase voltage and the second initial threshold value preset for each energization mode.
Inventors:
SAOTOME HIROTO (JP)
HANO MASAKI (JP)
HANO MASAKI (JP)
Application Number:
PCT/JP2023/032664
Publication Date:
March 28, 2024
Filing Date:
September 07, 2023
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
H02P6/182; H02P6/30
Domestic Patent References:
| WO2012029451A1 | 2012-03-08 |
Foreign References:
| JP2009189176A | 2009-08-20 | |||
| JPH0670578A | 1994-03-11 |
Attorney, Agent or Firm:
OGAWA, Moriaki et al. (JP)
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