| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a detection device of a power voltage phase, which can successively and highly precisely detect a power voltage phase with a simple structure, and to provide a detection method of the power voltage phase. <P>SOLUTION: The detection device of a power voltage phase for detecting the phase of a multi-phase power voltage includes: coordinate system conversion means converting a phase voltage or line voltage of the multi-phase power voltage into an orthogonal fixed coordinate system, and converting the orthogonal fixed coordinate system into an orthogonal rotary coordinate system having a voltage axis showing a peak voltage of an arbitrary phase in multiple phases and a voltage axis orthogonal to the voltage axis; and phase adjusting means adjusting the phase for conversion into the orthogonal rotary coordinate system so that a voltage value on the orthogonal voltage axis becomes zero. The phase for conversion into the orthogonal rotary coordinate system is estimated as the phase of the voltage of the arbitrary phase. <P>COPYRIGHT: (C)2013,JPO&INPIT |
