Algorithms for Minimizing the Effect of Network Delay of Sensor Data in Network-Based AC Motor Drive

The network-based control for ac motor drive system is becoming increasingly important. There will inevitably be network time delay from the sensors to the control system, which often degrades and even destabilizes the motor drive system. In this paper, the ac motor control system is implemented by a motor control module and three sensor modules such as a voltage sensor module, a current sensor module, and an encoder module. The algorithms to minimize the effect for network time delay of sensor data are proposed, using both the synchronization signal and the method for estimating sensor data. The performance of proposed algorithm is verified with experiments