Research of optimal control of 3-phase integrating magnetic VRM based on state variable feedback linearization control method

The application of planar integrated magnetic in the traditional multi-phase interleaving parallel voltage regulator module (VRM) make it towards the direction of low voltage and large current and “short, small, light, thin”, however, the magnetic coupling between each phase of the magnetic circuit complicates the work of the planar integrating VRM, and complicates the control methods considerably. This paper obtains the nonlinear decoupled control law of 3-phase integrating magnetic non-isolated VRM by differential geometry and passivity control treory. Firstly, the work state of 3-phase integrating magnetic VRM is analyzed to set up the three input and three output nonlinear model, and then the state variable feedback linearization control model of 3-phase integrating magnetic VRM is given based on the differential geometry and passivity control treory and considering the impact of system dynamic response on the weight coefficient. At last, the simulation results show the performance on dynamic and steady state of integrating magnetic VRM is good based on the state variable feedback linearization and passivity control.