| 摘要 |
<P>PROBLEM TO BE SOLVED: To stabilize a rotation relative to a fluctuation in a power supply voltage, regardless of the rotational state of a motor. <P>SOLUTION: A correction pattern is selected among a plurality of the correction patterns, by considering the duty of a drive pulse signal, calculated by a predetermined arithmetic expression as an index (S202-S210), and the duty of the drive pulse signal is corrected, based on the selected correction pattern, in response to the battery voltage applied to the brushless motor 51 (S212-S216). The rotation can be stabilized, by carrying a current to stator windings 52a-52c based on the corrected duty, regardless of the fluctuations in the power supply voltage. <P>COPYRIGHT: (C)2007,JPO&INPIT |
