Developing a system of instantaneous stator current values control in an ac electric drive

Abstract

The given research paper sees into AC energy saving electric drive control system, based on current inverter with a relay regulator of stator current. Application field of this system is lifting and handling machines and also special purpose industrial vehicles. Using recent hardware components, which provides new control algorithms application, extends electric drive control system functionality and advances energy loss enhancement. Frequency converter with self-commutated current inverter (SCSI) based on IGBT-transistors contains additional cutting diodes and buffer condenser blocks is developed and researched. Frequency converter ensures a near-sinusoidal output voltage curve form. Researches of designed AC electric drive control systems were performed, comprising analytic survey and mathematic simulation. Analytic surveys and simulation results confirm and show that control system meets specified requirements and is high-performance power system.