Predictive Current Control of Switched Reluctance Motor Based on Extended Observer

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Abstract
In order to solve the problem of current jitter caused by current not following the given value in the traditional deadbeat current predictive control system, a current predictive control method based on extended state observer was proposed. Based on the traditional deadbeat current predictive control algorithm, an extended state observer mathematical model including current and internal and external disturbances is established, and a weight factor is introduced. The reference current in the predictive control is modified by the current observation value, and then the reference voltage is compensated by the disturbance of the control system obtained from the observation, which effectively reduces the current loop disturbance of the system. In order to verify the feasibility of the proposed scheme, a three-phase 12/8 pole switched reluctance motor was used to build the simulation models of the traditional deadbeat current control and the current predictive control based on the extended state observer. The simulation results show that the proposed scheme can effectively reduce the current jitter and restrain the torque ripple.
Funding Information
  • National Natural Science Foundation of China (51609033)