Torque Ripple Suppression of Switched Reluctance Motor Based on Fuzzy Indirect Instant Torque Control

Abstract

High torque ripple limits the industrial application of switched reluctance motor (SRM) due to the deep magnetic saturation. This paper proposes a fuzzy indirect instant torque control (IITC) to suppress torque ripple. First, a fuzzy controller is developed to generate a compensation current according to the torque error. The input factor is then proposed and combined with artificial experience. Moreover, considering the relationship between current and electromagnetic torque, the output factor is appropriately designed according to the linearized inductance derivative. Finally, based on a three-phase 12/8 SRM, simulation and experimental results are provided to demonstrate the effectiveness of the proposed fuzzy IITC at torque ripple suppression. Compared with traditional proportion differentiation (PD) IITC, the fuzzy IITC proves its superiority in reducing torque ripple.

Keywords

• Fuzzy compensation
• indirect instant torque control
• switched reluctance motor
• current sharing function