Alternative Methods of Synchronous Space-Vector PWM for Transport-Oriented Converters and Drives

This manuscript presents short survey of novel methods, schemes, techniques, and algorithms of feedforward synchronous space-vector modulation elaborated for scalar control of power converters and induction motor drives for transport systems. It includes both description of features and peculiarities of these new modulation strategies, and examples of its development, modification, dissemination, and adaptation for basic topologies of three-phase, five-phase, and six-phase systems (dual-inverter, triple-inverter, quad-inverter systems) for surface, waterborne, and aerospace transport. These methods and algorithms of synchronous pulsewidth modulation (PWM) allow providing continuous synchronization and waveform symmetries of the phase and line voltages of ac drives, with minimization of undesirable sub-harmonics in spectra of voltage and current, and also with minimization of undesirable common-mode voltage in traction drive systems.