DESIGN AND IMPLEMENTATION OF A MODIFIABLE CLOSED-LOOP CONTROL SYSTEM FOR DC TO DC VOLTAGE REGULATION

Abstract

Purpose. The aim of the work is the design and creation of a modifiable closed-loop control system for DC to DC voltage regulation. Originality. The regulation parameters of modifiable close-loop control system can be easily change by proposed windows application. With such a system the regulation parameters can be easily determined without a calculation. Methodology. The paper as an example provides a description of a one DC to DC converter which belongs to buck-boost family. Presented converter is composed of two switching devices. For implemented a control strategy the galvanic isolated control signals technique was made to achieve desired control methodology. Control signals as well as the regulation itself was made by an ARM microcontroller type of STM32F103C8T6. Based on used MCU the control algorithm for voltage regulation was made. With such MCU the user interface where the whole system can be monitored and controlled was made also. The user interface is a windows application which was created with the help of a Visual Studio. Results. The paper provides the results achieved by the proposed control system. The results illustrated by windows application were compared with the oscillograms. From the results the incorrect regulation parameters can be easily spotted. Practical value. The advantage of such a control system is in the possibility of using it for various DC to DC converters where the regulation parameters can be easily determined without calculation. The user only connects the control signals to switching devices and connect the output voltage through voltage divider into the analogue input of the MCU. Disadvantage of the proposed system is, it can not be used without a PC where the windows application is running. Figures 15, references 8.