Event-triggered Speed Synchronization Techniques for Multi Permanent Magnet Synchronous Motors

In this paper, event-triggered control of various multi-motor synchronization techniques is proposed for efficient usage of network resources. The event-triggering strategy is employed on four motor synchronization techniques, viz., Master-reference control and Master-slave control. These synchronization techniques are developed for permanent magnet synchronous motor. The three-phase model of the motor is converted into two-phase model for simpler control. The PI-controllers are used to employ field-oriented speed control of the motor. Event-triggering condition is formulated, and the control law is implemented in an aperiodic manner, i.e., only when the event-triggering condition is reached. The proposed work shows that event-triggering strategy can be employed for multi-motor speed synchronization and the system stays stable. This leads to better utilization of communication, computational and energy resources. Lesser number of triggering pulses lead to efficient control. Also, a single event-triggering controller is sufficient for one motor synchronization technique.