A Robust Predictive Sensorless Controller for Permanent Magnet Synchronous In-wheel Motor

Abstract

The invention discloses a sensorless controller for a robust prediction permanent magnet synchronous hub motor, in which a sliding mode observation module, a 3s / 2r coordinate transformation module and a disturbance observation module are connected in series, the sliding mode observation module is connected in series with a reference flux linkage calculation module, and the disturbance observation module is connected in series Together with the reference flux calculation module, the in-wheel motor deadbeat model predictive control module is connected in parallel, the in-wheel motor dead-beat model predictive control module and the reference voltage compensation module, the inverter nonlinear compensation module, the 2r / 2s coordinate transformation module, and the in-wheel motor The control system is connected in series; the hub motor deadbeat model predictive control module avoids the defect of excessive calculation of model predictive control, the reference voltage compensation module compensates the disturbance caused by parameter mismatch to the reference voltage, and the inverter nonlinear compensation module avoids the defect caused by The mismatch between the reference voltage and the actual voltage caused by the nonlinearity of the inverter brings large errors to the rotor position and speed estimation. The sliding mode observation module realizes the sensorless observation of the position angle and rotor speed.

Description

technical field [0001] The invention belongs to the technical field of motor drive control, in particular to a surface-mounted permanent magnet synchronous hub motor controller for an electric vehicle. Background technique [0002] Electric vehicles are showing a rapid development trend due to their obvious advantages such as no pollution, diversified energy utilization, and high efficiency. Permanent magnet synchronous motors are widely used in various types of electric vehicles due to their high efficiency, high power density, and high reliability. The surface-mounted permanent magnet synchronous hub motor is different from the traditional inner rotor motor to drive the entire electric vehicle through the transmission system. It can completely omit a series of mechanical parts such as clutches and transmissions on the traditional internal combustion engine, and integrate the drive, transmission and braking devices. Integrating into the wheel hub simplifies the chassis stru...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems existing in the existing permanent magnet synchronous wheel hub motors that the motor parameters are mismatched or the accuracy of the sensors is reduced or even invalidated due to temperature, humidity or other external factors, thereby affecting the performance of the motor. In addition, considering the reverse The nonlinear problem of the transformer brings large errors to the estimation of the position and speed of the rotor. A robust predictive sensorless controller for permanent magnet synchronous in-wheel motors that can effectively improve the control accuracy of the system is proposed.

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