Suspending Control Scheme Of 8/10 BLSRM Using Adaptive Fuzzy PID Controller

Due the advantages such as simple structure, high efficiency, strong tolerance property and flexible control strategy, the switched reluctance motor(SRM) has drawn lots of attention of the industry. BLSRM is a new type of motor which developed on the basis of traditional switched reluctance motor. It combines the magnetic bearing into a conventional SRM. The rotor is supported by magnetic force from the motor itself, so that the rotor shaft may suspend and rotate at the time. BLSRM no long as the advantages of simple structure, high speed like SRM, but also has the advantages of no abrasion, no friction like active magnetic bearing. It will be widely used in high speed motors, space flight and so on.Fore conventional suspending control strategies are introduced. Based on the disadvantage of these control method, which the control parameters are fixed, this paper propose a new control strategy: adaptive fuzzy PID controller. And a fuzzy logic controller is designed, which can be combined with the conventional PID controller to realize the control parameters self-tuning online. Based on the control strategy, a block diagram of 8/10 BLSRM driving system is designed.In order to verify the validity of the control strategy, a new prototype was designed and manufactured. According to the new motor control strategy, a Matlab simulation model and experimental platform of the 8/10 BLSRM drive system are build, and the dynamic performance are simulated and experimented. Simulation and experimental results show that the motor can be suspended stably with this new control method. In teal-time control, the eccentric error can be controlled in ?30?m,and the speed of the motor can be achieved 6000 rpm. Using the adaptive fuzzy PID controller, when the speed increased from 2000 rpm to 6000 rpm, the maximum eccentric rotor displacement is 70?m, and when the eccentric load changes, the biggest eccentric rotor displacement 50?m. Compare with the traditional PID controller, the dynamic performance of the new type controller is better. Verify the effectiveness of the new control strategy.