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New Modified C-dump Drivers With PI Capacitor Bridge for Switched Reluctance Motor

2011-09-10
Najmi, V.
Siadatan, A.
Afjei, E.
Afjei, M. S.
Switched Reluctance Motors (SRM) are known as uncomplicated structure machines, have some characteristics which make them remarkable for high speed low voltage applications. Due to have full utilization of SRNI performance, attain to efficient drive circuit for this kind of motors is desirable. In this paper, a new class of modified C-dump drivers with PI Capacitor Bridge for switched reluctance motors is proposed. This new drive circuits take the advantage of having faster rate of energy discharge from each phase windings and an energy recovery circuit. Faster rate of fall for phase current permits the motor to operate at higher speed and also prevents the motor to work at saturation mode. This feature improves motors torque profile because of phase's demagnetization. To have better consideration about this new class of C-dump drive circuit, simulation analysis for proposed PI Capacitor Bridge C-Dump drive circuit is carried out.