Space Vector PWM Techniques for Parallel Connected Dual-Split-Phase IMs for Full Power Range Using Capacitive Filters

This paper describes a novel space vector pulse width modulation (SVPWM) scheme for the decoupled control of two parallel connected split phase induction machines operated from a single six-phase VSI which acts as a power source. To limit the flow of non-torque producing current, two switched capacitor filters are added. It is possible to operate both the motors at full rated power with low switching frequency, and decoupled control for full power range can be achieved. This is possible because the individual machines in the proposed configuration do not carry the load and harmonic currents of other machine (as in the case of conventional series/parallel connected machines). Two different schemes of SVPWM techniques are discussed and compared. Experimental results for both the schemes are provided in this paper.