No position detection method for sr motor to travel to the area where the phase inductance does not change with the angle

Abstract

The invention discloses a location-free detection method used when an SR motor travels to a region with phase electrical inductance changeless with angle variation, which comprises the following steps of: 1, determining the comprehensive performance parameter of an SR motor to be detected and selecting a conventional location-free detection method suitable for the SR motor to be detected; 2, establishing an actual mathematical model of the SR motor to be detected; and 3, carrying out zoning angular location detection on the SR motor to be detected by utilizing a processor: firstly demarcating the region with the phase electrical inductance changeless with the angle variation, and applying the original location-free detection method for location estimation before a conduction phase of the motor enters the region; and when the conduction phase of the motor enters the region with the phase electrical inductance changeless with rotor variation, resetting a constant speed detection region range for realizing the detection of the angle calculated by speed. The invention has simple steps, convenient implementation, strong practicality, high detection precision and small error, and can effectively solve the defects and insufficiency of low detection precision, huge error and the like existing in traditional method used when the SR motor travels to the region with the phase electrical inductance changeless with angle variation.

Description

technical field [0001] The invention belongs to the technical field of SR motor rotor position detection, and in particular relates to a non-position detection method for an SR motor traveling to a region where phase inductance does not vary with angle. Background technique [0002] Switched Reluctance Motor (Switched Reluctance Motor referred to as SRD) is a new type of motor developed rapidly in the 1980s. It integrates SR motor with modern power electronics technology control technology and microcomputer technology. It has a simple structure, strong, It has the characteristics of easy speed regulation, flexible control, high reliability and strong fault tolerance, and has the advantages of asynchronous motor frequency conversion speed regulation system and DC motor speed regulation system. Position closed-loop control is one of the basic characteristics of switched reluctance motors, but the existence of position sensors makes the advantages of simple structure inferior, ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a position-free detection method for the SR motor to the area where the phase inductance does not change with the angle, which has simple steps, convenient implementation, strong practicability and high detection accuracy. , The error is small, which can effectively solve the defects and deficiencies such as low detection accuracy and large error when the existing SR motor runs into the area where the phase inductance does not change with the angle

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