| 摘要 |
<P>PROBLEM TO BE SOLVED: To detect a vector phase with high accuracy in real time while using a simple configuration. <P>SOLUTION: The detecting method includes a step of determining that the great and small relation of signal amplitude of each phase of inputted three-phase signal is any one of consecutive six different durations, a step of executing predetermined subtracting processing among each of phases in the duration in accordance with the determined duration, a step of using a result of subtraction processing to obtain a normalized amplitude value normalized in the duration, and a step of converting the obtained normalized amplitude value into a vector phase of one cycle using the predetermined phase corresponding to the determined duration and outputting it. <P>COPYRIGHT: (C)2008,JPO&INPIT |
