Abstract:
Brushless dc (BLDC) drives have, high efficiency, electromagnetic interference, and high mechanical reliability due to the absence of brushes. They are very suitable for integrated starter alternators in hybrid electric vehicles. This paper discusses about comparison of both PI and fuzzy logic control for a BLDC drive. This control strategy is simple and effective. The advantage of FUZZY logic system is that they do not require any current sensors. This technique can be implemented on a low cost PIC microcontroller. This paper deals about the potential stability issues due to the simplicity of this control under various conditions of load disturbances and also owing to the reduction in processor capability. Lyapunov stability criteria have been used to analyze the closed-loop stability of the system.

Keywords: Adaptive Fuzzy Logic Controllers