A Deadbeat Direct Torque Control Method for Switched Reluctance Motor

Abstract

The invention provides a deadbeat direct torque control method of a switched reluctance motor, comprising the following steps: calculating the position angle of the rotor through a photoelectric encoder, and calculating the flux linkage and current of the motor in a rotating coordinate system; The error with the feedback torque and the given flux linkage and the three-phase voltage and current in the stator coordinate system; calculate the space voltage vector in the rotating coordinate system for controlling the operation of the motor in the next beat; obtain six pulse signals to control the motor. The present invention directly controls the torque and flux linkage by controlling the two-phase reference voltage in the rotating reference coordinate system, and controls the flux linkage and torque within one control cycle, so that the torque ripple is smaller and the flux linkage is also significantly reduced .

Description

technical field

[0001] The invention relates to a torque control method of a switched reluctance motor, in particular to a stepless direct torque control method of a switched reluctance motor. Background technique

[0002] Switched reluctance motor (SRM) was first proposed in the 1940s, but due to technical limitations at that time, it was not well developed. With the development of power electronic devices and the advantages of simple structure, low cost, good fault tolerance and wide speed range of the switched reluctance motor itself, it has attracted widespread attention from academia and industry, and a large number of researches have also been carried out. . Various specifications of switched reluctance motor speed control systems have been put into the market one after another, and the products cover electric vehicles, household appliances and other fields, which shows the broad application prospects of switched reluctance motors. However, the doubly salient pole st...

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