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Robust nonlinear prediction torque control method suitable for permanent magnet synchronous motor

A permanent magnet synchronous motor, nonlinear prediction technology, applied in the direction of motor generator control, AC motor control, electronic commutation motor control, etc., to reduce torque fluctuation, improve robustness, and reduce the amount of calculation.

Active Publication Date: 2018-07-24
TIANJIN UNIV
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Problems solved by technology

However, since there are infinitely many candidate vectors in the control set of the continuous control set model prediction algorithm, it is difficult to realize the online screening of the optimal vector directly according to the principle of minimum value function

Method used

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  • Robust nonlinear prediction torque control method suitable for permanent magnet synchronous motor
  • Robust nonlinear prediction torque control method suitable for permanent magnet synchronous motor
  • Robust nonlinear prediction torque control method suitable for permanent magnet synchronous motor

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Embodiment Construction

[0052] The design idea of ​​the present invention is to propose a robust nonlinear predictive torque control strategy for the permanent magnet synchronous motor system, which considers the torque fluctuation and robustness of the permanent magnet synchronous motor control system; the nonlinear The predictive control strategy is applied to the predictive torque control, and the torque fluctuation is reduced by obtaining the optimal control rate of the nonlinear predictive torque, thereby improving the control performance of the system, and constructing a nonlinear disturbance observer and a robust load disturbance observer , which is used to observe disturbances caused by other uncertainties such as motor parameter changes and load mutations, thus effectively improving the robustness of the algorithm. It shows that the torque fluctuation of the system is small in the steady state, and the system runs more stably; it has good anti-load disturbance ability in the dynamic state and...

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Abstract

The invention relates to the permanent magnet synchronous motor control field and provides a robust nonlinear prediction torque control method suitable for a permanent magnet synchronous motor. The robustness of an algorithm and the control precision of a system to a torque and flux linkage are effectively increased. The robust nonlinear prediction torque control method suitable for the permanentmagnet synchronous motor comprises the following steps of step1, constructing a permanent magnet synchronous motor nonlinear system state equation; step2, calculating the optimal control rate of nonlinear prediction torque control; step3, constructing a nonlinear disturbance observer; step4, constructing a robust load disturbance observer; and step5, realizing a robust nonlinear prediction torquecontrol algorithm. The method is mainly applied for a synchronous motor control occasion.

Description

technical field [0001] The invention relates to the field of permanent magnet synchronous motor control, in particular to the field of motor control that takes into account the running performance of the motor under the condition of predictive torque control. Specifically, it relates to a robust nonlinear predictive torque control method for permanent magnet synchronous motors. Background technique [0002] Permanent magnet synchronous motors have the advantages of wide speed range, high torque output capability, and high controllability, and are widely used in many industrial fields such as robots, locomotive traction, and aerospace. In recent years, with the rapid development of power electronics technology and microprocessors, model predictive control algorithms have been gradually applied to the fields of power electronics control and motor control. [0003] At present, for the permanent magnet synchronous motor drive system fed by the voltage source inverter, the commo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/30H02P21/20H02P21/13H02P25/024H02P27/08
CPCH02P21/13H02P21/20H02P21/30H02P25/024H02P27/08
Inventor 史婷娜肖萌周湛清阎彦夏长亮
Owner TIANJIN UNIV
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