Title:
CONTROL METHOD AND CONTROLLER
Document Type and Number:
WIPO Patent Application WO/2021/036794
Kind Code:
A1
Abstract:
Provided in the present invention are a control method and a controller. The method comprises: collecting the rotor position of a permanent magnet synchronous motor, the rotational speed of the motor, a quadrature-axis current, a direct-axis current, and a pulse-width modulation duty cycle of a three-way bridge arm, compensating for the rotor position on the basis of the rotational speed of the motor, calculating a three-phase current on the basis of compensated rotor position information, finally, using the three-phase current and a PWM value as inputs for the calculation of a bus current, determining a bus current estimate, and obtaining a target bus current value when the bus current estimate is low-pass filtered, thus controlling the permanent magnet synchronous motor on the basis of the target bus current value. The control method of the present invention allows the compensation of a three-phase current at any position, and in all working conditions, regardless of whether the rotational speed of the motor is a high speed or a low speed, increased estimation precision is provided; this allows engineering staff to know the bus current at all times, thus implementing the precise control of the permanent magnet synchronous motor.
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Inventors:
WANG QIANNAN (CN)
JANA ARUP (CN)
JANA ARUP (CN)
Application Number:
PCT/CN2020/108812
Publication Date:
March 04, 2021
Filing Date:
August 13, 2020
Export Citation:
Assignee:
GREAT WALL MOTOR CO LTD (CN)
International Classes:
H02P6/28; H02P21/18; H02P21/22; H02P27/12
Foreign References:
| CN107919828A | 2018-04-17 | |||
| CN102593841A | 2012-07-18 | |||
| CN106788072A | 2017-05-31 | |||
| US20060022628A1 | 2006-02-02 | |||
| CN201910818960A | 2019-08-30 |
Other References:
See also references of EP 4007158A4
Attorney, Agent or Firm:
BEIJING RUN ZEHENG INTELLECTUAL PROPERTY LAW FIRM (CN)
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