PMSM ROTOR POSITION ESTIMATION ERROR COMPENSATION METHOD BASED ON LESO
In the operation of high speed permanent magnet synchronous motor,whether the rotor position is accurate or not determines the performance of the system.For the method that only compensates the Angle error caused by one-beat lag and zero-order holder,and compensates the error Angle obtained by decoupling with feedforward,the performance is not good in terms of accuracy and dynamics.Therefore,this paper analyzes the causes of rotor position estimation errors,deduces a general mathematical model of error Angle,and proposes a compensation method for rotor position estimation errors based on linear extended state observer(LESO).Based on the derived model,a LESO was designed to extract the rotor position error Angle,and the obtained rotor position error Angle was used for compensation.The rotor position error Angle estimation takes into account the influence of different types of non-ideal factors and the influence of inductance voltage on the error Angle in the dynamic process.It has high accuracy and good dynamics.Finally,a systematic experimental platform is built,and the experimental results show that the proposed method has advantages in accuracy and dynamics.
permanent magnet synchronous motorerror of rotor position estimationangle compensationlinear extended state observer
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