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Title:
METHOD FOR CONTROLLING SMOOTH START OF PERMANENT MAGNET SYNCHRONOUS MOTOR UNDER SENSOR-LESS VECTOR CONTROL
Document Type and Number:
WIPO Patent Application WO/2020/228201
Kind Code:
A1
Abstract:
A method for controlling a smooth start of a permanent magnet synchronous motor under sensor-less vector control. After a permanent magnet synchronous motor is started, a mode thereof is set as a constant-torque operating mode or a constant-speed operating mode. The method comprises: open-loop control: driving, with Iq_max as a target value of a q-axis current, a motor to operate, and under the open-loop control, when an actual steady-state operating speed V of the motor reaches a first target speed V_ref1, entering a constant-speed closed-loop control mode; and a constant-speed closed-loop control stage: using a current PI control loop of a q axis to slowly converge a real-time detected current value Iq1 of the q axis to Iq0; and in the constant-speed closed-loop control mode, increasing the first target speed V_ref1 to the highest target speed V_max to control the motor to operate, and then entering a constant-torque control mode. The method can ensure a smooth and stable start, reduce the vibration and noise during motor operation and improve start reliability.

Inventors:
LAN JINGHAO (CN)
BIAN WENQING (CN)
Application Number:
PCT/CN2019/105364
Publication Date:
November 19, 2020
Filing Date:
September 11, 2019
Export Citation:
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Assignee:
ZHONGSHAN BROAD OCEAN MOTOR CO (CN)
International Classes:
H02P21/34; H02P21/18; H02P21/24
Foreign References:
CN109995298A2019-07-09
CN103219933A2013-07-24
CN101984554A2011-03-09
Attorney, Agent or Firm:
ZHONGSHAN HANTONG INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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