Control system design of a battery discharge unit for space applications

The problem of control system design is discussed for a high frequency DC-DC converter which is based on the push-pull circuit with autotransformer. The proposed converter may be used as a battery discharge unit in power supply system of satellites. The mathematical model of the converter is described. The proportional-integral (PI) current controller and PI voltage controller are designed based on singular perturbation technique. Procedure for selection of controller parameters is highlighted. Numerical simulations are included in order to show the applicability of the proposed design methodology in practice.