An Existing Resource Inverter (CSI) is a kind of variable regularity drive (VFD) which converts incoming AC voltage and also varies the frequency and also voltage provided to the AC Induction Electric Motor. The general setup of this sort of VFD resembles that of other VFDs because it includes a Converter, DC Link, and Inverter. In order to keep the right voltage to regularity (Volt/Hertz), the voltage has to be managed by the correct sequencing of the SCRs. The DC Link for this kind of variable frequency drive utilizes an inductor to control the current ripple as well as to store the power made use of by the motor. The inverter, which is accountable for transforming the DC Voltage back to an AC sine-like waveform, consists of SCRS, gateway turn-off thyristors (GTOs) or symmetrical gate-commutated thyristors (SGCTs).