| 摘要 |
<p>Provided is an apparatus for detecting input phase missing and a method thereof, wherein the apparatus includes: a power input unit applying a 3-phase AC voltage; a rectifying unit rectifying the AC voltage applied from the power input unit; a filter unit bandpass-filtering the rectified voltage and calculating magnitude of ripple voltage from the filtered voltage; and a missing input phase detecting unit determining whether an input phase missing has occurred according to the magnitude of the ripple voltage, whereby the input phase missing can be detected without an error, and a method thereof, and fast response and simplicity of embodiment can be realized without calculation process of ripple frequency.</p> |
