| 摘要 |
<p>The present invention relates to a power supply apparatus based on magnetic field transformation. More specifically, in a voltage waveform of an input current generated through a magnetic field, an input current of an available region within an allowed voltage range is selectively permitted, while an input current exceeding the allowed voltage range is interrupted, thereby energy can be normally secured even in an overvoltage section to smoothly supply electric power to monitoring equipment or measurement equipment of a high voltage and super-high voltage transmission and distribution line. A generated input current is first interrupted through selective overvoltage prevention, and the entire input current is secondly interrupted depending on a charge voltage of a super capacitor, an output level of output power, and the like, thereby overvoltage prevention in consideration of an extensive current band of the transmission and distribution line is effectively performed to thus provide stable power in a broad band unlike an existing power supplier supplying limited power in a narrow band. A current value of the input current is measured to recognize a winding ratio and a current value of the transmission and distribution line through the measured current value, and complexly utilized for power supply or a primary current transformer (CT) by control modes, thereby being very practical in terms of weight, volume, and cost without the need of extra primary and secondary CTs for current measurement.</p> |
