This paper aims to present an adapted DC power supply for a high-current regulation system based on an iron-core inductance with local saturations. The present work highlights a magnetic coupling between the power circuit and its command which creates a 100 Hz current component because of the non-linearity of the iron-core. With the simple structure well adapted to high current applications, it is not possible to remove this AC component superimposed on the DC current. A dedicated DC supply is proposed to maintain a stable average current in the command coils despite the 100 Hz current component.
The magnetic coupling between the power circuit and command coils is investigated and highlighted using finite element simulations and measurements. Based on these results, a dedicated DC power supply is designed and experimentally validated on the high-current regulation system.
Experimental observations confirm the good performance of the proposed control strategy. The DC supply provides a stable average command current despite the 100 Hz component impossible to remove.
Because of the 100 Hz current component superimposed on the DC command current, a standard DC power supply cannot be used. The main contribution of this work is designing of a power supply able to tune the average current in the command coils despite the 100 Hz current component inherent in the non-linearity which is the principle of local saturation inductance.
