Development of ac motor speed controller using micro controller – Based cycloconverter

Johari, Nur Tasnim (2022) Development of ac motor speed controller using micro controller – Based cycloconverter. Project Report. Melaka, Malaysia, Universiti Teknikal Malaysia Melaka. (Submitted)

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Abstract

In both the industrial and home sectors, the induction motor is the most extensively utilised machine. It is known as a constant-speed machine, and one of its key shortcomings is the difficulty of adjusting its speed with a cost-effective device. By synthesising the output waveform from parts of the AC supply without an intermediate DC link, a cycloconverter or cycloinverter converts a constant amplitude, constant frequency AC waveform to another AC waveform of a lower frequency. A cycloconverter-based speed controller is suitable to be used to control the speed of AC motor since it is low cost and low losses as compare to other type of speed controller. In this project, an AC motor speed controller developed using a microcontroller-based Cycloconverter circuit. The circuit consists of Arduino UNO microcontroller and SCRs that can change the frequency of AC voltage to the load. The circuit will be connected to a single phase AC motor to test the efficacy of the proposed gadget. It is found that the developed device can reduce the frequency of input AC voltage, subsequently can control the speed of AC motor.

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