| Abstract |
The main theme of this paper is to investigate the performance of various types control methods,
including proportional-integral (PI) control, PI-type fuzzy logic control (FLC), proportional-derivative
(PD) type FLC, hybrid control, and combination of PD-type FLC and I control, for direct torque
control (DTC) induction motor drives. The so-called hybrid control approach is a new method
presented in this paper, which consists of PI control at steady state, PI-type fuzzy logic control at
transient state, and a simple switching mechanism between steady and transient states.
The pros and cons of these controllers will be demonstrated by intensive experimental results. It will
be shown that the proposed hybrid control approach is with fast tracking capability, less steady state
error, and robust to load disturbance while not resorting to complicated or observer-based control
method. |
