Novel nonlinear L2 gain control method for doubly-fed induction motor based on port controlled Hamiltonian model

Applying a novel nonlinear L2 gain control method for a doubly-fed induction motor (DFIM) based on port-controlled Hamiltonian (PCH) systems, A PCH model of DFIM was established. The desired closed-loop Hamiltonian function was given. Against the load torque disturbance, L2 gain control law was designed in terms of PCH system and the L2 gain disturbances attenuation. The equilibrium stability of the system was also verified. Using SVPWM signal transformation method, speed regulation of non-salient pole SVPWM was implemented by controlling the switch point of every converter switch. The control of speed and electromagnetic-torque are tracking asymptotically when interferences exist in the surrounding environment. The simulation results show that the proposed scheme has a good performance.