REGULAR-SAMPLED HARMONIC-ELIMINATION PWM CONTROL OF INVERTER DRIVES

Novel Harmonic Elimination PWM strategies for drives, uninterruptible power supplies and static power converters have recently been developed using modified Regular-Sampling techniques, These new PWM strategies can be generated on-line in real-time using a simple microprocessor software algorithm, without resorting to the usual time consuming off-line mainframe computer harmonic elimination numerical techniques. These new PWM techniques can be used over the complete voltage/frequency range of the drive up to and including the transition from PWM to Quasi-Square Wave operation, Results from an experimental microprocessor controlled PWM inverter drive are presented to demonstrate and confirm the special feature of the new Regular-Sampled Harmonic Elimination PWM control strategies.