| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a brushless motor controller that suppresses vibrations and noise arising from the positional displacement of a rotational position detection means with respect to a stator. <P>SOLUTION: The brushless motor controller 10 is provided with a Hall element 11, that outputs a rotational position detection signal corresponding to the rotational position of a magnet rotor 3 to the stator 2 and a conduction control portion 15 that outputs a PWM signal that instructs conduction timing to coils U, V, W, based on the rotational position detection signal. Furthermore, the controller 10 is provided with a microphone 16, that outputs a noise signal corresponding to the amount of the positional displacement in the circumferential direction of the Hall element 11 to the stator 2, an output correction portion 17 that corrects and outputs the PWM signal based on the noise signal, and a three-phase inverter 18 that energizes the coils U, V, W, based on the PWM signal input from the output correction portion 17. <P>COPYRIGHT: (C)2007,JPO&INPIT |
