Switched reluctance motor sensorless initial positioning control method

Abstract

The invention discloses a switched reluctance motor sensorless initial positioning control method, and belongs to the technical field of switched reluctance motor control. According to the invention,high-frequency pulses are injected into the three-phase windings of the switched reluctance motor at the same time; based on the method, pulse current information of the whole period can be obtained,according to the relation between the pulse current and the winding inductance, the inductance is equally partitioned by utilizing the pulse current, the initial starting phase is determined accordingto the pulse current of each partition, and the method is suitable for estimating the initial position of the static switched reluctance motor or the switched reluctance motor with a certain initialspeed. The method does not need a complex control strategy, is simple and convenient in algorithm, is reliable in position estimation, and is higher in universality.

Description

technical field [0001] The invention discloses a position sensorless initial positioning control method of a switched reluctance motor, belonging to the technical field of switched reluctance motor control. Background technique [0002] The structure of the switched reluctance motor is fundamentally different from that of the traditional AC and DC motors. The rotor formed by lamination of silicon steel sheets has neither windings nor permanent magnets made of rare earth materials; the stator is wound with simple and concentrated coils. The entire machine The structure is relatively simple. The switched reluctance motor has a large starting torque and a high torque / current ratio, so it is often used in frequent starting occasions. However, the position sensor is easily damaged in harsh environments, causing the motor to fail to operate normally; at the same time, the existence of the position sensor will increase the cost and complexity of the system, thereby reducing the re...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the above-mentioned background technology and provide a versatile and highly portable switched reluctance motor sensorless initial positioning control method without the need to predict the electromagnetic characteristic data of the switched reluctance motor and The precise mathematical model can estimate the rotor's location, which solves the traditional non-conducting phase detection method, additional component detection method, intelligent control and other switched reluctance motor position sensorless initial positioning methods rely on the parameters of the motor body, and the technical problems of complex calculations

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