A noval speed control strategy based on multi model framework for continuous wave mud pulser

Speed control of permanent magnet synchronous motor (PMSM) is the key part of continuous wave mud pulse generator to transmit data. In this paper, a multi model framework speed control of PMSM is proposed for the continuous wave mud pulser control system. With the knowing of the relationship between the PMSM mathematical model parameters and the temperature of the external environment, the decomposition of the PMSM model is carried out by the multiple model thinking. Then, different PID controllers are designed for the PMSM speed control based on the mathematical model corresponding to different external environment temperatures. Simulation results show that this control strategy solves the shortcoming of using a single PID controller and improves the speed tracking performance with the periodic step given signals.