Starting Methods of Induction Motor
A three Phase induction motor is self starting.When the supply is connected to the stator of a three-phase induction motor, rotating magnetic field is produced.and the rotor starts rotating and the induction motor starts.At the time of starting the starting current is very high.Due to this high current, we need some soft start for motor. Soft Starter A motor soft starter is a device used with Ac electrical motors to temporarily reduce the load and torque in the power train and electric current surge of the motor during start up. Motor often require large amounts of energy when quickly accelerating to full speed. Soft starters and variable frequency drives can both be used to reduce inrush current and limit torque protecting equipment and extending the life of a motor by reducing motor heating caused by frequent starts and stops.But there are a number of differences between a soft starter and a varia...