Direct Torque Control for Brushless Doubly-Fed Machine Based on Fuzzy-PI Regulator

Abstract:

The inverter switch state is based on the torque error and the stator flux amplitude error in the hysteretic controller which is adopted on the traditional direct torque control for the brushless doubly-fed machine, in this way, current and flux are distorted that results torque ripple in low speed range, even more influents control effect of the whole system. According to this problem, a new direct torque control method with fuzzy-PI regulator for the brushless doubly-fed machine is presented in this paper, applying the fuzzy theory to design controller parameters. The simulation results show that the method is effective to improve the dynamic characteristics of the motor, reduce the torque ripple, improve the speed and the torque control precision, and expand the direct torque control system of speed range.

• Periodical: Advanced Materials Research (Volumes 614-615)
• Pages: 1185-1189
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.614-615.1185
• Online since: December 2012
• Authors: Xiao Peng, Mo Fa Li, Yong Jian Li
• Keywords: Brushless Doubly-Fed Machine, Fuzzy Pi Control, Simulation Analysis

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