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<p>In this study, a proposed inverter system capable of maintaining a stable output amplitude even under variable grid conditions has been designed and implemented to meet the variable voltage and frequency requirements of loads such as industrial vibration coils. The proposed system consists of a rectifier, a PID-controlled (proportional–integral–derivative) non-inverting buck–boost converter, and a full-bridge inverter stage driven using sinusoidal pulse width modulation (SPWM). Unlike conventional two-stage inverter topologies, the non-inverting buck–boost converter employed in the proposed configuration ensures a stable DC (direct current) link voltage over a wide input voltage range. This feature renders the inverter output amplitude completely independent of grid fluctuations, thereby enhancing the system’s power quality. Furthermore, the inclusion of a clamped circuit prevents excessive voltages across the load and limits the voltage stress on the switching devices, improving both efficiency and reliability. The DC–DC converter maintains a constant DC-link voltage against grid voltage variations, making the inverter output amplitude independent of input conditions. Consequently, the inverter provides a sinusoidal AC (alternating current) output with an adjustable amplitude in the range of 90–220&#xa0;Vrms and a frequency that can be varied between 30 and 80&#xa0;Hz. The implemented simulation and experimental results demonstrate that the system exhibits high stability, low harmonic distortion, and fast dynamic response under variable grid conditions. With these characteristics, the proposed configuration offers a flexible, efficient, and reliable energy conversion solution for industrial loads.</p>

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Design and implementation of an enhanced inverter system providing adjustable amplitude and frequency under variable grid conditions

  • 期刊论文

  • 发表日期：

    2026年4月9日

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  • Kübra Baltaci,
  • Hasan Meral,
  • Tolga Ateşci

摘要

In this study, a proposed inverter system capable of maintaining a stable output amplitude even under variable grid conditions has been designed and implemented to meet the variable voltage and frequency requirements of loads such as industrial vibration coils. The proposed system consists of a rectifier, a PID-controlled (proportional–integral–derivative) non-inverting buck–boost converter, and a full-bridge inverter stage driven using sinusoidal pulse width modulation (SPWM). Unlike conventional two-stage inverter topologies, the non-inverting buck–boost converter employed in the proposed configuration ensures a stable DC (direct current) link voltage over a wide input voltage range. This feature renders the inverter output amplitude completely independent of grid fluctuations, thereby enhancing the system’s power quality. Furthermore, the inclusion of a clamped circuit prevents excessive voltages across the load and limits the voltage stress on the switching devices, improving both efficiency and reliability. The DC–DC converter maintains a constant DC-link voltage against grid voltage variations, making the inverter output amplitude independent of input conditions. Consequently, the inverter provides a sinusoidal AC (alternating current) output with an adjustable amplitude in the range of 90–220 Vrms and a frequency that can be varied between 30 and 80 Hz. The implemented simulation and experimental results demonstrate that the system exhibits high stability, low harmonic distortion, and fast dynamic response under variable grid conditions. With these characteristics, the proposed configuration offers a flexible, efficient, and reliable energy conversion solution for industrial loads.