Title:
CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/153050
Kind Code:
A1
Abstract:
A control device 60 comprising a PWM generation unit 63 that outputs a PWM drive signal to an inverter 40, and a torque limiting unit that outputs a limited torque command to the PWM generation unit 63 on the basis of a motor temperature and a torque command from a higher-level control unit, the control device 60 being such that: the torque limiting unit has a torque limit coefficient calculation unit 61 that calculates a torque limit control coefficient on the basis of the motor temperature, and a limited torque calculation unit 62 that outputs the limited torque command to the PWM generation unit 63 on the basis of the torque command and the torque limiting coefficient; and the torque limit coefficient calculation unit 61 limits the output torque on the basis of the motor temperature when the motor temperature is higher than a prescribed temperature, and, when the rate of change over time of the motor temperature is greater than a prescribed value, limits the torque so that the torque varies more gradually than when the rate of change over time is less than or equal to the prescribed value.
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Inventors:
SAMBONSUGE HIROKAZU (JP)
Application Number:
PCT/JP2020/046664
Publication Date:
August 05, 2021
Filing Date:
December 15, 2020
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
H02P29/62; B60L15/20; H02P27/08
Domestic Patent References:
| WO2018142952A1 | 2018-08-09 | |||
| WO2017163609A1 | 2017-09-28 |
Foreign References:
| JP2018102102A | 2018-06-28 | |||
| JP2003304604A | 2003-10-24 |
Attorney, Agent or Firm:
TODA Yuji (JP)
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