Synthesis of a boost converter for a load simulator of autonomous objects power supply systems

The paper deals with the synthesis of a boost converter for a simulator designed to form loads of power supply systems of autonomous objects based on the converter mathematical description in the form of a differential equations system. Equations that allow building a model of a boost converter that combines the power part and the control system are derived. This model describes the electromagnetic and information processes within the device and is implemented as a digital module within the control system of the converter. A block diagram of the model in MATLAB Simulink can be implemented as both continuous averaged and discrete. This depends on the control signal applied to the model input, i.e. continuous or pulse periodic with duty ratio D. The continuous averaged model is used for the digital synthesis of the converter, whereas discrete is employed to test the boost converter of the load simulator. A current transfer function of the converter with variable parameters depending on the duty ratio is derived. The developed boost converter provides the load current of up to 360 A. The ripple coefficient of the input current is under 0,6 %. The research results may be of interest to specialists in the field of power electronics, power supply systems of autonomous objects and control systems.