| Abstract |
Recent research results [1-3] have shown that using conventional PWM technique for inverter control
instead of switching table in a Direct Torque Control (DTC) induction motor drive can effectively
reduce the torque ripple without invoking the increase of sampling frequency. However, three
controllers, including torque, flux and speed controllers, are required for DTC-based induction motor
drives with PWM inverter control. Moreover, the parameters of controllers are usually decided by
trial and error approach.
The objective of this paper is to present the applications of fuzzy logic control to DTC-based
induction motor drives with inverter controlled using space vector modulation technique. It will be
shown that the controllers are implemented using PI-type fuzzy logic control and the presented DTCbased
induction motor drive has the features of fast response, disturbance rejection, and low speed
ripple. Experimental results derived from a test system will be presented confirming the theoretical
development. |
