Title:
MOTOR DRIVING DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/110315
Kind Code:
A1
Abstract:
This motor driving device (100) is provided with an inverter (1), a controller (3), and a detector (4). The controller (3) is provided with a voltage control unit (50), a coordinate transformation unit (20), a pulsation extraction unit (30), and a phase synchronization calculation unit (40). The controller (3) controls the voltage which is output to a motor (2) by the inverter (1), and performs calculation for estimating a rotational position and a rotational frequency of the motor (2). The coordinate transformation unit (20) converts the motor currents obtained from the detector (4) to two-phase currents (20a, 20b) in a coordinate system at rest. The pulsation extraction unit (30) extracts pulsating currents (30a, 30b) from the two-phase currents (20a, 20b). The phase synchronization calculation unit (40) calculates an estimated pulsation phase (40a) and an estimated pulsation frequency (40b). When this calculation is performed, the voltage control unit (50) calculates and outputs a voltage command value with which any of the motor currents do not become zero.
Inventors:
KADOI SHINSUKE (JP)
Application Number:
PCT/JP2018/044296
Publication Date:
June 04, 2020
Filing Date:
November 30, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P21/32
Foreign References:
| JP2004336866A | 2004-11-25 | |||
| JP2016019359A | 2016-02-01 | |||
| JP2007097275A | 2007-04-12 | |||
| JP2012120297A | 2012-06-21 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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