Slip-Energy Recovery (SER) scheme for three phase Induction Motor
•Slip-Energy
recovery scheme is use to increase the efficiency.
•The
slip-energy recovery scheme simply utilize the wasted power of induction
motor.
•Slip
power of induction motor can be recovered by adding a variable voltage source in rotor of induction motor.
•That
variable voltage source will absorb the slip power and send back to AC supply.
•Slip-energy
recovery scheme provide the speed control to a induction motor.
•By
varying the magnitude of the variable voltage source we can control the current, torque and slip of rotor.
•In
the rotor resistance control method there is I^2
R losses so efficiency is less.
•The Slip-Energy Recovery scheme basically consists of rectifier, reactor, converter, and transformer.
•Rectifier is connected to rotor which converts
AC to DC and forces the power to flow away from winding.
•Reactor is use to smoothen the current.
•Phase controlled converter is use in inversion mode as a inverter for converting DC
to AC.
• Transformer is use to improve power factor.
•So the power absorb by the rectifier is send
back to
supply.
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