A method for calculating and calibrating that zero angle of a rotor position sensor of a permanent magnet synchronous motor

A permanent magnet synchronous motor and rotor position technology, which is applied in the control of generators, motor generators, electromechanical brakes, etc., can solve problems such as large calibration errors, failure to meet product requirements, and errors in zero-angle calibration results of motor sensors.
CN109004875AActive Publication Date: 2018-12-14SAIC MOTOR +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SAIC MOTOR
Publication Date
2018-12-14

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Abstract

A method for calculating zero angle of rotor position sensor of permanent magnet synchronous motor disclosed in the invention includes defining P physical zero angles, forward rotation direction and reverse rotation direction of rotor of permanent magnet synchronous motor in one revolution; Calculating a given current vector of forward rotation and reverse rotation of a rotor at each physical zeroangle position of the motor; The zero angle of each physical zero angle position forward rotor position sensor and the zero angle of the reverse rotor position sensor are obtained by loading the forward and reverse current vectors of the motor. The zero angle of each physical zero angle position forward rotor position sensor and the zero angle of the reverse rotor position sensor are obtained. The forward and reverse loads of the motor are measured, and the zero angle errors of the forward rotor position sensor and the reverse rotor position sensor of each physical zero angle position are eliminated by weighted calculation, so that the zero angle of each physical zero angle rotor position sensor is obtained. The invention also discloses a zero angle calibration method of a rotor positionsensor of a permanent magnet synchronous motor. The invention can avoid the error caused by the load to obtain more accurate zero angle of the rotor position sensor and more accurately calibrate the zero angle of the rotor position sensor.
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Description

technical field

[0001] The invention relates to the field of automobiles, in particular to a method for calculating the zero angle of a rotor position sensor of a permanent magnet synchronous motor. The invention also relates to a method for calibrating the zero angle of the rotor position sensor of the permanent magnet synchronous motor using the calculation method for the zero angle of the rotor position sensor of the permanent magnet synchronous motor. Background technique

[0002] According to the field oriented control (FOC) algorithm, the control parameters (such as: voltage, current, inductance) of the permanent magnet synchronous motor (in the following description, all involved "motor" refers to "permanent magnet synchronous motor") from three-phase static After the UVW coordinate system is converted to the orthogonal dq coordinate system, it will introduce such as figure 1 The motor rotor electrical angle θ is shown. The angle θ is usually obtained by the feedbac...

Claims

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