Research On Suppressed Torque Of Switched Reluctance Motor

Switched reluctance motor is a new type of speed-regulating motor.Compared with Asynchronous motors have no short circuit in the control system and higher reliability;but due to their working principle,the pulsating torque is more serious,making it difficult to promote in places with high requirements on vibration and noise.Although scholars at home and abroad have done a lot of research on the suppression of pulsating torque of switched reluctance motors,the suppression effects are mostly limited.Therefore,in order to further improve the market competitiveness of switched reluctance motors,research on the effective suppression of pulsating torque of switched reluctance motors has important theoretical significance and practical value.Thesis presents the research on the suppression of pulsating torque of dual-stator dual-rotor switched reluctance motor based on the principle of peak-valley complementarity.The main contents are as follows:First,the existing characteristics of the switched reluctance motor are analyzed and studied.The main reason of the pulsating torque is analyzed through the body structure,working principle and mathematical model of the switched reluctance motor,and the pulsating torque is measured experimentally.It is verified that the commutation of the motor is the main reason for the pulsating torque.Second,after carefully analyzing the waveform of the measured pulsating torque of the switched reluctance motor,thesis proposes a low-pulsation torque switched reluctance of a dual-stator dualrotor system based on the principle of peak-valley complementation to suppress the cancellation of pulsating torque.Motor.Specifically: First,in thesis,two sets of fixed-rotor systems with the same parameters are used to build a low-pulsation torque dual-stator dual-rotor switched reluctance motor,and the two sets of fixed-rotor systems are reasonably misaligned to produce two phase differences of 180 ° Pulsing torque of electrical angle,based on the principle of peak-valley complementation,suppresses the pulsating torque.Secondly,thesis proposes a circuit structure that separates commutation and voltage and speed regulation.On the one hand,it improves the fault of the power inverter circuit of the traditional controller.The high rate defect,on the other hand,avoids part of the high-frequency pulsating torque generated by the motor due to voltage chopper control;again,thesis adds two sets of fixed-rotor current coordinated control to the voltage chopper control algorithm,To achieve the same power operation of two fixed rotor systems to improve the operating efficiency of the dual-stator dual-rotor switched reluctance motor and the symmetry of the two pulsating torques;finally,the Hall position detection signal at the motor shaft end is replaced by high-speed photoelectric Detect the signal and improve the commutation accuracy by optimizing the accuracy of the position signal to improve the symmetry of the two pulsating torque waveforms,thereby increasing the pulsation Moments offset suppression effect.Third,for the dual-stator dual-rotor low-pulsation torque switched reluctance motor speed regulation system proposed in thesis,a dual-stator dual-rotor switched reluctance motor is developed in thesis,and a driver and high-speed optoelectronics for commutation and voltage separation The hardware circuit of the position sensor is designed by adding a current coordination control system software program.An experimental platform for the speed regulation system of a switched reluctance motor with dual stators and two rotors was set up.The left and right systems of the new prototype were tested independently.There was no offset suppression experiment(the left and right stators were staggered by 0 ° electrical angle)and offset suppression experiment(the left and right stators are staggered by 180 ° electrical angle).The low-pulsation torque characteristics of a dual-stator dualrotor low-pulsation torque switched reluctance motor based on the principle of peak-valley complementation to suppress the suppression of pulsating torque are experimentally verified.The effectiveness and feasibility of the method are illustrated.