A Novel Braking Scheme for Induction Machines

This paper deals with a novel method of braking induction machines. Diodes are connected in series with the primary or secondary machine circuits as the phase sequence of the supply to the primary is reversed and rapid braking to standstill or a low crawl speed is produced. Effective braking also results when diodes are connected in circuit, without reversal of supply phase sequence, if the load torque or the secondary resistance is above a critical, minimum level.