| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that a conventional brushless motor rotor position detection method cannot be used when the rotor positions fluctuate during measurement due to much time taken for measurements, an actual application of the conventional method to an electric bicycle is not possible because it involves a risk due to an error of the rotor which fluctuates on a hill or the like even when the electric bicycle is stopping, and it is necessary to find out a means that can correctly detect the position even if the rotor fluctuates a little. <P>SOLUTION: Normally, rotor position measurement is carried out to a three-phase coil by measuring current in six types of energization modes. The new method can detect the position in substantiality two or three times of measurements by developing a flow that selectively eliminates insignificant, unnecessary measurements from the six types of energization modes. <P>COPYRIGHT: (C)2010,JPO&INPIT |
