Designing power supply (PS) using digital PID based on AVR microcontrollers

Abstract

This paper presents a method to design a kind of power supply (PS) using PID (Proportional, Integral, and Derivative) controller. AVR microcontroller, atmega16 has been used in designing PS. Nowadays most of industrials systems use microcontrollers. PS is the integral part in each of them. A good idea is using these processors in order to generate the needed power for other parts of the systems. Especially the appearance of microcontroller with too many facilities such as; timer, counter, interrupt, and so forth can help to use them more effectively. PID controllers are used widely in industry and they have proved their helpfulness. Designed PS uses digital PID that has been designed with too many facilities in AVR microcontroller. This kind of PS is in small size. Likewise, it can be compacted to be used in portable devices such as mobile or lap top chargers. Their efficiency is higher than usual linear power supplies. It will be more effective for systems with high demanded power rather than with low power, because in high level power there is no need to use transformer and the whole size of the system will be reduced.