| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a drive control device for a brushless motor, capable of stably driving the brushless motor by properly correcting a duty ratio for controlling a PWM, in line with the fluctuations of a DC power supply voltage. <P>SOLUTION: The fluctuation of the voltage of a battery 2 is monitored based on a sampling result. The duty ratio of the pseudo AC voltage is corrected, such that when the rising amount of a DC voltage V1 is larger than a determination reference value Vc1, an effective voltage fed to the brushless motor 1a is made smaller than the effective voltage fed thereto before the voltage rises, and when the dropping amount of a DC voltage V2 is larger than a determination reference value Vc2, the effective voltage fed to the brushless motor 1a is made larger than the effective voltage fed thereto, before the voltage drops. <P>COPYRIGHT: (C)2003,JPO |
