New energy vehicle synchronous reluctance motor control method based on AC stepping control

Abstract

The invention provides a new energy vehicle synchronous reluctance motor control method based on AC stepping control. The synchronous reluctance motor control method for new energy vehicle based on ACstepping control discretely subdivides the stator current vector of three-phase current synthesis for a synchronous reluctance motor, and obtains the discrete positioning position of the space according to a certain cycle number, thereby realizing the position control of the motor by controlling the spatial position of the stator magnetic field so as to realize speed control. Synchronous reluctance motor stepping transmission control with positional characteristics provided by the synchronous reluctance motor control method is to convert the control difficulty in accurate modeling, caused bynonlinearity of the salient pole of the rotor by using the AC stepping control method, so as to realize high-accuracy positional control, and solves the problem of low speed torque ripple, complicatedstructure, and the like in the traditional control mode.

Description

technical field [0001] The invention relates to the technical field of AC motor transmission, in particular to a control method for synchronous reluctance motors for new energy vehicles based on AC step control. Background technique [0002] The synchronous reluctance motor has a simple structure, the stator is the same as the three-phase AC motor, and the rotor is similar to the switched reluctance motor. The synchronous motor with reluctance properties has high efficiency, high power density, easy to weaken magnetic field speed expansion, easy maintenance, and low cost. Significant advantages, high utilization value in new energy vehicle drive system. [0003] AC stepping drive control was proposed by Professor Liu Zongfu of Northeastern University in 1981. In 1996, Dr. Sun Hexu published the academic monograph "AC Stepping Drive System", which expounded it more comprehensively and systematically. Subsequently, in terms of theoretical research and engineering application...

AI Technical Summary

Problems solved by technology

The direct torque control system is easily affected by the two-position control and the calculation accuracy of the flux linkage, resulting in large torque ripples and poor low-speed performance of the motor at low speeds

However, the traditional vector control requires complex coordinate transformation, which makes the system structure complex, the amount of calculation is large, and there are certain difficulties in practical application. Therefore, there is currently no AC step control for synchronous reluctance motor control.

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