| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for determining alignment errors of the Hall sensor of a brushless direct current motor, preferably, by measuring back EMF waveforms during the inertial drive period of the motor. <P>SOLUTION: Angle offsets are calculated betwwen a selected BEMF waveform and a selected Hall signal. It is preferable that the offsets be calculated independently for each phase. The offsets are accumulated on a motor control unit, and used for adjusting the output motor control signals, in order to obtain a maximum torque. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
