Active current converter mathematical model and control

Abstract

The paper represents totally controlled switches based active current rectifier working in a PWM mode vector mathematical model. Active current rectifier has certain advantages output current management, energy recuperation, supply line power factor management and forming near sinusoidal line currents. Developed model can be used for electrical drives vector control system synthesis. Represented approach also can be applied to current source inverter operating mode analysis. The simulation results are presented. It is well-known that frequency converter based 011 current source inverter (CSI) is advisable for alternative current electric drive (ACED) operating in heavy dynamic conditions. But conventional rectifier circuit design does not afford electromagnetic compatibility with supply line. The problem can be solved by replacing normally used thyristor rectifier by active current rectifier (ACR) based on totally controlled power semiconductor switches. Such switches implementation allows to realise PWM commutation algorithms that gain recuperation, near sinusoidal line consumption currents and power factor management. Nowadays there are a lot of papers dedicated to active voltage converters' (AVR) controller synthesis [1-5], but active current converter operating mode examination and description is insufficient. The paper represents the three-phase bridge ACR working in PWM-mode mathematical model development results. © 2000 IEEE.