A method and apparatus of variable structure for controlling asynchronous motors. More particularly, methods and apparatus for control of flux, torque, angular acceleration, angular velocity, and/or angular position of the rotor of an asynchronous motor, supplied through a converter having switched ...http://www.google.com/patents/US4499413?utm_source=gb-gplus-sharePatent US4499413 - Method and apparatus for the control of synchronous motors
