Speed Control of Three Phase Slipring Motor By Static Rotor Resistance Control

Description

Experimental setup complete with Slipring Induction Motor.

 Power Circuit : This part consists of a 3-phase bridge rectifier to convert 3-phase rotor supply to DC supply. An indicator is connected in series with the DC supply for smoothning of a DC. A Glass fuse is connected in series with the DC supply.
An IGBT is provided for chopper control MOSFET is mounted on a proper heat sink. Snubber circuit is connected across MOSFET for dv/dt. A fuse is also provided for protection. All the points are brought out on the front panel for interconnection.
 Control Circuit : The control circuit generates driver output for driving the MOSFET in chopper mode. The duty cycle can be varied from 0% to 90%. The frequency can be varied.

Soft start and soft stop is provided for driver output