Title:
MAGNETIC FIELD ORIENTATION CORRECTION METHOD AND APPARATUS FOR PERMANENT MAGNET SYNCHRONOUS MOTOR, DEVICE AND MEDIUM
Document Type and Number:
WIPO Patent Application WO/2022/120772
Kind Code:
A1
Abstract:
A magnetic field orientation correction method and apparatus for a permanent magnet synchronous motor, an electronic device, and a computer-readable storage medium. Said method comprises: calculating a first value of a power factor angle on the basis of a current model of a permanent magnet synchronous motor; calculating a second value of the power factor angle on the basis of an instantaneous power model of the permanent magnet synchronous motor; performing generalized PID calculation on the difference value of the first value minus the second value, so as to acquire a deviation angle; and subtracting the deviation angle from a detection value of a rotor magnetic field position angle, so as to acquire a correction value of the rotor magnetic field position angle. In the present application, the magnetic field orientation deviation is accurately calculated on the basis of the power factor angle calculated in different ways, so that the rotor magnetic field position angle of the permanent magnet synchronous motor is accurately corrected, thereby improving the magnetic field orientation accuracy. Vector control is performed on the motor on the basis of the calibrated result, so that the current loss of the motor can be effectively reduced, and the output torque and operation efficiency of the motor under the unit current can be increased.
Inventors:
SHEN WEN (CN)
WANG ERFENG (CN)
WANG YU (CN)
WU XUANQIN (CN)
WANG GUOJIAN (CN)
DONG RUIYONG (CN)
WANG ERFENG (CN)
WANG YU (CN)
WU XUANQIN (CN)
WANG GUOJIAN (CN)
DONG RUIYONG (CN)
Application Number:
PCT/CN2020/135534
Publication Date:
June 16, 2022
Filing Date:
December 11, 2020
Export Citation:
Assignee:
SHENZHEN INVT ELECTRIC CO LTD (CN)
International Classes:
H02P21/18; H02P25/026; H02P27/08
Foreign References:
| CN104410336A | 2015-03-11 | |||
| CN111092578A | 2020-05-01 | |||
| CN110943661A | 2020-03-31 | |||
| CN1604457A | 2005-04-06 | |||
| JP2001286198A | 2001-10-12 |
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)
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