Adaptive Fuzzy Neural-Network Control for Induction Spindle Motor Drive

An induction spindle motor drive using synchronous pulse width modulation (PWM) and dead-time compensatory techniques with an adaptive fuzzy neural-network controller (AFNNC) is proposed in this study for advanced spindle motor applications. First, the operating principles of a new synchronous PWM technique and the circuit of dead-time compensator are described in detail. Then, since the control characteristics and motor parameters for high speed operated induction spindle motor drive are time-varying, an AFNNC is proposed to control the rotor speed of the induction spindle motor. In the proposed controller, the induction spindle motor drive system is identified by a fuzzy neural-network identifier (FNNI) to provide the sensitivity information of the drive system to an adaptive controller. The back-propagation algorithm is used to train the FNNI online. Moreover, the effectiveness of the proposed induction spindle motor drive system is demonstrated using some simulated and experimental results.