Design and development of variable power supply based on buck-boost converter using sliding mode technique

Zali, Muhammad Idham (2021) Design and development of variable power supply based on buck-boost converter using sliding mode technique. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Most of electronic equipment operates in range 1.5V to 24V and it always be powered from batteries. However, batteries have specific voltage value to deliver power for equipment, thus making it less flexible. For some cases, an adjustable power supply is needed for various reason, for example, a repair technician uses an adjustable power supply to troubleshoot a faulty component. Most universal power supplies that are available at market are designed by using step-down transformer, rectifier, and filter circuit. Thus, a desired voltage output at a constant value cannot be produced under different load due to open loop control configuration. To overcome this limitation, a variable power supply device is designed based on buck-boost converter circuit. The device will be equipped with closed loop control of sliding mode control (SMC) algorithm to enable constant output voltage under different load. SMC is used in this project since it can control the output voltage under various load conditions by using the same controller gain. The device will be developed by combination of Arduino microcontroller, buck-boost converter circuit, seven segment display and potentiometer, where the input of this device will be taken from 12VDC source.

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