Real-time estimation control of inductance parameters using dust core materials for PWM inverter

In recent years, the switching frequency is increased in power converters due to improvement of the switching devices, which result in the reduction of the size of the passive components. The dust core material is used for the inductance core of the PWM inverter to downsize the filter component. In that case, the flux density is saturated for the large inductance current and the inductance parameter is varied widely due to the inductance current variations. The output characteristics is deteriorated with the conventional control. The deadbeat control method combined with the disturbance compensation and the inductance estimation methods were proposed. Also 1 MHz multisampling method was applied to adjust the control gains for the inductance parameter variations. The advantage of the proposed method was verified through simulations and experiments.