High Voltage DC Measurement Through Low-pass Filter Ripples Detection in Parallel Resonant Converters With no-Inductor at Output

The parallel resonant converter with an uncontrolled end rectifier, with no inductor at the output, has a low-pass filter for ripple reduction. The ripples in this case has been a serious challenge and various researches were conducted to minimize it. However much the ripples are reduced, they have not been fully removed. Being a drawback, however this paper will use it in another sense, like an advantage of measuring the High Voltage DC (HVDC). In this paper, the Parallel Resonant Converter (PRC) will be discussed, with the HVDC output having different levels based on variation in switching frequencies and duties. The measurement of HVDC has been a challenge in different researches. The proposal of measuring the output DC voltage through ripples detection will be developed and the comparative method as an approving method will be proposed.