Five-phase Motor And Its Drive Control System Design

Because of its strong fault tolerance,more flexible control methods,and lower power supply for single-phase,multi-phase asynchronous motors are widely used in ships,aerospace,and other fields that require high reliability of the motor system and have limited supply voltage.Based on the design requirements of a five-phase motor and its drive control system for the towing system of an underwater submarine communication sonar,this paper conducts a theoretical analysis of the design of multi-phase motors,the harmonic effects of inverter power supply,and motor control.Completed the following work:First of all,according to the electromagnetic design method of the traditional asynchronous motor,a method of size design of the five-phase squirrel cage motor is obtained.The main size,slot width,and air gap are optimized by the scanning method,and the parameters of the motor are completed.After the design,Ansys simulation software was used to verify the designed motor.On the basis of the above motor design,combined with the traditional modeling method to derive the compound space model of the five-phase motor in order to verify the vector control algorithm.The harmonic influence of the five-phase inverter SVPWM is analyzed,and the unified expression of the harmonics of the modulation wave is deduced.Based on the low harmonic SVPWM and single space vector control algorithm,the feasibility of single space vector control and the effect of harmonic suppression are verified through simulation.Finally,in view of the fault situation caused by the lack of phase of the motor winding or the damage of the inverter,the fault-tolerant control strategy based on vector control is carried out on the fault-tolerant motor using the symmetrical component method.Using the designed and manufactured five-phase motor and vector control platform,the effectiveness of faulttolerant control is verified.