Multi-motor synchronization control strategies are studied in this paper. To reduce the complexity of control
structure and the difficulty in determining the compensation law of commonly used cross coupling control strategy when the
number of motors is large, a ring coupling strategy based on the thought of the parallel control with error compensation is
presented. The control method with the ring coupling strategy is proved.The proposed strategy is applied to the control of a
four-motor system, and simulation results show that the proposed control strategy has higher synchronization accuracy and
better dynamic performance compared with that of master-slave control strategy.