Synchronous Control Strategy of Dual Motor Speed Based on Model Predictive Current Control
In the conventional dual motor speed synchronous control system,two permanent magnet synchronous motors and their drives are proportional integration controller(PI).The system needs many parameters to debug.Even if it uses complex speed synchronous control strategy,the dual-motor drive system responds slowly.The speed synchroniza-tion error is big and can be easily disturbed.A novel cross-coupled speed synchronous control method is proposed with opposite speed compensation in speed loop.And an extended state observer is used to obtain the load and un-measurable disturbance torque,which can be compensated to the current control loop.A model predictive current control algorithm is used in the current control to improve the response of current loop.A simulation model of dual motor speed synchronous control is established.Compared with conventional synchronous control methods,the results show that the speed response time of the proposed dual-motor drive system is shortened by 50％,and the transient speed synchronization accuracy is improved by 65％,the immunity of the system is improved.
model predictive current control(MPCC)extended state observer(ESO)cross-coupled synchronous control
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