Nonlinear H/sub 2/ and H/sub /spl infin// optimal controllers for current-fed induction motors

This paper presents a nonlinear control design for both the H/sub 2/ and H/sub /spl infin// optimal control for current-fed induction motor drives. These controllers are derived using analytical stationary solutions that minimize a generalized convex energy cost function including the stored magnetic energy and the coil losses, while satisfying torque regulation control objectives. Explicit control expressions for both the H/sub 2/ and H/sub /spl infin// optimal design are given. Furthermore, the optimal attenuation factor, i.e., the optimal H/sub /spl infin// norm and the corresponding worst case disturbance, are both computed explicitly.