Digital simulation of current source inverter-fed induction motor drive

Describes a digital simulator for the analysis of any thyristor converter. The analysis is based upon a topological method of formulation of state equations. Power thyristors and diodes are modelled as inductances. The value of each thyristor inductance changes from a finite value equal to the di/dt limiting series inductance, while conducting, to an infinite value when blocked. The simulator takes into consideration the presence of the snubber circuits associated with each thyristor element. The simulator library which has been named ATOSEC I has been developed with computer aided design power electronic converters in mind. It has been implemented on a CDC CYBER and will be available from the authors.