Switch reluctance machine sensor redundancy system and automatic switching method

Abstract

The invention belongs to the technical field of motor speed regulation, and in particular to a switch reluctance machine sensor redundancy system and an automatic switching method. The switch reluctance machine sensor redundancy system is characterized by comprising a magnet ring supporting member connected with a motor shaft, a magnet ring fixed to the magnet ring supporting member, a plurality of sensor plates located on the periphery of the magnet ring, an interface circuit board connected to the plurality of sensor plates through signal lines, Ns Hall sensors disposed on the sensor plates,signal output interfaces I disposed on the edges of the sensor plates, two signal input interfaces I disposed on both edges of the interface circuit board, and a signal output interface II disposed on the interface circuit board, wherein the signal output interface II is connected with a motor control board. The switch reluctance machine sensor redundancy system provided by the invention has a simple connection with the outside world, high anti-interference ability and small error, is suitable for use in harsh environments, can realize an automatic switching function of faulty sensors, and prolongs the trouble-free running time of a speed regulating system.

Description

technical field [0001] The invention belongs to the technical field of motor speed regulation, and in particular relates to a switch reluctance motor sensor redundancy system and an automatic switching method. Background technique [0002] With the development of power electronics technology and control technology, the speed control technology of switched reluctance motor can develop rapidly. The control of a switched reluctance motor requires knowledge of the rotor position. The reluctance of the magnetic circuit of each phase of the switched reluctance motor changes with the angular position of the rotor. In order to make it work normally, the current of the corresponding phase winding must be turned on or off when the rotor turns to an appropriate position to ensure the current of each phase Synchronized with the corresponding rotor position and always correctly switches the windings of each phase during the rotation of the rotor. Therefore, the angular position detecti...

AI Technical Summary

Problems solved by technology

However, this sensor still has its own shortcomings: 1. The protection level of the sensor is relatively low, and it is easily affected by dust and rain, and the sensor is easy to age and damage;

[0003] 2. The detection of the position of the motor depends on the machining accuracy of the code disc of the photoelectric sensor. When the machining accuracy of the code disc is not high, it will affect the accuracy of speed calculation and motor angle control, which will easily lead to unbalanced current of each phase during motor control, motor vibration, Loud noise, and the power device of the controller is easily damaged

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