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Disturbance suppression method of permanent magnet synchronous motor

A permanent magnet synchronous motor, disturbance suppression technology, applied in the direction of motor generator control, electronic commutation motor control, control generator and other directions, can solve the problems such as deviation of the predicted control output voltage from the accurate value, affecting the smooth operation of the motor, etc., to reduce the The effect of reducing the amount of calculation, shortening the calculation time, and simplifying the system design

Active Publication Date: 2019-05-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0004] In order to solve the deficiencies in the design of the existing disturbance observer, especially for the voltage disturbance caused by the change of inductance during the operation of the motor, which causes the output voltage of the predictive control to deviate from the accurate value and affects the smooth operation of the motor, the present invention combines the extended Kalman filter theory , provides a disturbance suppression method for permanent magnet synchronous motors, using a disturbance observer based on extended Kalman filter, which can accurately observe the system disturbance caused by parameter mismatch

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  • Disturbance suppression method of permanent magnet synchronous motor
  • Disturbance suppression method of permanent magnet synchronous motor

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Embodiment Construction

[0042] The method provided by the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0043] The method includes three aspects: model establishment, deadbeat current prediction control and EKF algorithm online disturbance observation. The above three aspects are described in detail below:

[0044] 1. Model establishment

[0045] When the motor is running, the motor controller can collect the running status information of the motor in real time, and the running status information includes current, speed, and rotor position. The controller can obtain the corresponding switching sequence of the inverter according to the collected motor running state information combined with the corresponding control strategy, so as to drive the motor to run.

[0046] The mathematical model of the permanent magnet synchronous motor in the α-β coordinate system:

[0047]

[0048] where u α , u β is the stator voltage in the α-β coord...

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Abstract

The invention aims to overcome the defects existing in the design of the existing disturbance observer, and particularly, aims at the problems that the stable operation of a motor is affected by the deviation of a predicted control output voltage from an accurate value due to the voltage disturbance caused by the inductance change in the operation process of the motor. A disturbance suppression method of a permanent magnet synchronous motor is provided by combining an extended Kalman filtering theory, and a disturbance observer based on extended Kalman filtering is adopted, so that system disturbance caused by parameter mismatch can be accurately observed. Compared with a traditional method, the method has the advantages of being simple in design, good in dynamic and static following performance and the like.

Description

technical field [0001] The invention relates to the field of disturbance suppression in the control of permanent magnet synchronous motors, in particular to observation and compensation of voltage disturbances of permanent magnet synchronous motors under the condition of inductance mismatch. Background technique [0002] In the digital control system applied to permanent magnet synchronous motor control, deadbeat current predictive control is a widely used method, which has the characteristics of small amount of calculation, good dynamic and static tracking performance, compared with the traditional PI Control, deadbeat current predictive control has better control effect. However, since the deadbeat current predictive control depends on the accurate motor model, when the motor parameters are mismatched, the calculated reference voltage will deviate from the accurate value, and then the current and torque of the motor will fluctuate significantly. By combining predictive co...

Claims

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Application Information

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IPC IPC(8): H02P21/13H02P21/14
Inventor 张承宁张春涛张硕周莹
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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