Motor Power Pulsation Buffer for Single-to-Three-Phase Current-Source-Converter Drives

Single-phase-input variable-speed drives (VSDs) for three-phase motors typically employ bulky dc-link capacitors for buffering the inherent power pulsations at twice the mains frequency. Alternatively, the power pulsation can be accommodated in the drivetrain’s moment of inertia, a concept known as motor power pulsation buffer (MPPB). This paper briefly describes how a state-of-the-art control implementation for single-to-three-phase voltage-source converters (VSCs) with MPPB functionality can be adapted to monolithic-bidirectional-GaN-transistor-based current-source converters (CSCs) which provide motor-friendly sinusoidal output voltages and feature the same transistor count.