PROJECT TITLE :

Dead-Time Effect Compensation Based on Additional Phase Current Measurements

ABSTRACT:

This paper proposes a new methodology of dead-time effect compensation. The proposed resolution is predicated on additional phase current measurements realized by analog-to-digital converters. These measurements are distributed at the time instants specified by a pulsewidth-modulation (PWM) strategy. This makes it attainable to estimate inverter currents at the commutation instants and, finally, to estimate the voltage error caused by dead time. This voltage error is compensated during the subsequent switching amount by modification of a reference voltage. The proposed solution can be used to compensate the voltage error in multilevel multiphase voltage supply inverters. The experimental analysis studies were allotted on three-section 2-level and three-level neutral-purpose-clamped inverters supplying fifty five- and a hundred and sixty-kW motors, respectively. The results of the experimental investigations are presented in this paper.


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