MICROPROCESSOR CONTROLLED STATIC SLIP POWER RECOVERY SCHEME

Abstract

The dissertation concerns the design, fabrication and evaluation of steady state performance of a micro - processor controlled static slip power recovery drive by using rectifier-line commutated inverter combination in the recovery loop. An idealized mathematical model de s-cribirig the behaviour of the system has been developed based on the concept of coupled circuit approach. The system has been analyzed in synchronously rotating refe-re rice frame . The model involves the parameters which can be easily measured at the terminals of the slip ring induction motor. The equations describing steady state performance of the drive are derived from the general mathematical model. The firing pulses for thyristors of the LCI are generated by the microprocessor in proper sequence with the help of synchronizing si,7rials derived from supply voltage. The steady state perforriance has been obtained experimentally using the fabricated system and the expe-rimental results have shown a ; ood correlation with computed results.