14-02-2013, 04:25 PM
INDIRECT VECTOR CONTROL OF INDUCTION MOTOR USING FUZZY LOGIC CONTROLLER
INDIRECT VECTOR CONTROL.doc (Size: 90.5 KB / Downloads: 23)
ABSTRACT:
The paper presents a fuzzy logic speed control system based on fuzzy logic approach for an indirect vector controlled induction motor drive for high performance. The analysis, design and simulation of the fuzzy logic controller for indirect vector control induction motor are carried out based on fuzzy set theory. The proposed fuzzy controller is compared with PI controller with no load and various load condition.
Indirect field oriented current control
Indirect vector control is similar to direct vector control except the unit vector signals (cosqe and sinqe) are generated in a feedforward manner
The ds-qs axes are fixed on the stator and the dr-qr axes are fixed on the rotor. The de-qe axes are rotating at synchronous speed and so there is a slip difference between the rotor speed and the synchronous speed given by:
ADVANTAGES:
• The designed fuzzy logic controller realizes a good dynamic behavior of the motor with a rapid settling time,
• No overshoot and has better performance than PI controller.
• Fuzzy logic control has more robust during change in load condition.