28-06-2012, 12:27 PM
Field-Oriented Control of Induction Machine
Field-Oriented Control .ppt (Size: 479 KB / Downloads: 180)
Why FOC ?
IM is superior to DC machine with respect to size, weight, inertia, cost, speed
DC motor is superior to IM with respect to ease of control
High performance with simple control due de-coupling component of torque and flux
FOC transforms the dynamics of IM to become similar to the DC motor’s – decoupling the torque and flux components
Basic Principles of IM
Stator flux induces rotor current produces rotor flux
Interaction between stator and rotor fluxes produces torque
Space angle between stator and rotor fluxes varies with load, and speed