Development of a single –phase h-bridge inverter based on microcontroller sinusoidal pulse-width modulation scheme for residential load applications

Authors

  • G. C. Diyoke Department of Electrical and Electronic Engineering, Michael Okpara University of Agriculture, Umudike, Abia State.
  • I. K. Onwuka Department of Electrical and Electronic Engineering, Michael Okpara University of Agriculture, Umudike, Abia State.
  • O. Oputa Department of Electrical and Electronic Engineering, Michael Okpara University of Agriculture, Umudike, Abia State.

Keywords:

H-bridge inverter, Microcontroller, Single-phase, Sinusoidal Pulse Width Modulation (SPWM).

Abstract

This paper presents the development of a single-phase H-Bridge inverter based on microcontroller sinusoidal pulse width modulation scheme for residential load applications. The quests to reduce the harmonic contents of the conventional inverter necessitated this research paper. The power switches firing signals are generated using a microcontroller (AT-MEGA 328). Furthermore, the microcontroller is able to store the required commands to generate the necessary waveforms to control the amplitude and frequency of the H-bridge inverter through appropriate design. A pure sine wave of output voltage and current are obtained with reduced total harmonic distortion. This inverter is designed to be for stand-alone from a direct current supply (battery). In this paper, a block diagram is developed, which contains the battery, H-bridge inverter, step-up transformer, L-C filter and the control system. All these blocks are discussed. Finally, MATLAB/Simulink simulations and experimental results are generated and discussed. The 1.2 kVA designed prototype was tested with a 48.5 ohm resistive load and found equal value of voltage THD to be less than 4.00 % with 220 Vrms.

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Published

2023-03-18

Issue

Vol. 1 No. 1 (2023): MAIDEN EDITION|UNIZIK Journal of Engineering and Applied Sciences

Section

Articles