A model reference adaptive PWM technique

A model reference adaptive pulse-width-modulation (PWM) technique is presented and analyzed. With this technique, the near optimal inverter gating signals are determined through a closed-loop process which compares a reference signal to a feedback signal derived from a built-in reference model of the load. In addition to its simplicity of implementation, the technique has the advantages of inherent controlled constant volts per hertz (V/f) radio operation and filter-free operation with free-running carrier. Such features are of importance in variable-speed AC drive applications where V/f control increases the control circuit complexity and carrier frequency jumps cause harmful torque/speed transients