Space vector based PWM of dual full-bridge VSI fed two-phase induction motor drive

Two-phase induction motor (TPIM) can be controlled using a 4-leg voltage source inverter (VSI) topology. A space vector based space vector pulse width modulation (SVM) is proposed in this paper for the 4-leg VSI by decomposing it into a dual single phase full-bridge VSIs. The switching algorithm is envisaged by exploiting the principles of SVM of three-phase VSIs. The implementation of the proposed SVM exploits the use of effective-time period concept and is entirely based on instantaneous magnitudes of the four phase reference voltages corresponding to the actual reference space vector. The use of effective time concept obviates the need for sector identification and reduces the execution time thus making the whole task of modulation fairly simple. The proposed SVM is simulated first using MATLAB/Simulink and are experimentally verified on a 1/4 hp TPIM controlled with V/f control in the linear modulation range.