The discrete time control of a three phase 4 wire PWM inverter with variable DC link voltage for simultaneously supply of three phase and single phase load in transformerless stand alone photovoltaic application with battery energy storage (BES) and LC output filter is described.
Motivated by the need of energy-efficiency improvements, process optimization, soft-start capability and numerous other environmental benefits, it may be desirable to operate induction motors for many applications at continuously adjustable speeds. The induction motor drives can provide high productivity with energy efficiency in different industrial applications and are the basis for modern automation. This book provides an account of this developing subject through such topics as modelling, noise, control techniques used for high-performance applications and diagnostics....
As both vector controlled induction machines and vector controlled SPMSM require current controlled
PWM inverter, then it is possible to discuss current control methods independently of the type of the
drive. In other words,
As both vector controlled induction machines and vector controlled SPMSM require current controlled PWM inverter, then it is possible to discuss current control methods independently of the type of the drive. In other words, all the current control techniques described further on are applicable in both induction motor and SPMSM vector controlled drives.
Variable voltage, variable frequency operation of induction machines is realised utilising autonomous
inverters, in conjunction with a rectifier and a DC link circuit. The voltage source inverter (VSI) is the
most frequently applied power supply source for speed control of induction motors. It can be operated in
six-step mode or in PWM mode. Six-step operation will be considered first.