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Many published methods of rotor position estimation of permanent magnet synchronous machines (PMSM) for medium to high speed are based on the estimation of the back electromotive force (EMF) voltage. From a practical point of view and the demand of minimum complexity, a simple idealized motor model is used many times. Due to this simplification and to a change of coordinates, an observation error...
A universal current vector controller for vector-controlled induction motor (IM) drives, based on control of motional electromotive force (MEMF), is presented. It is demonstrated that the rotor field orientation decouples not only flux and torque but also transformer electromotive force (TEMF) and MEMF in rotor. The control of torque and speed in variable-frequency induction motor drives can be achieved...
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