| 摘要 |
<p>A brushless motor is provided to reduce vibration and noise by using a near-sinusoidal sensorless driving circuit. A brushless motor(10) is driven by a sensorless driving circuit. The brushless motor includes a rotation body(20), a rotor magnet(23), a stator(33), and a coil(332). The rotation body is rotated around a central axis(J1). The rotor magnet is coaxially arranged with the rotation body. A magnetic flux density of a side of the rotor magnet is distributed into a near-sinusoidal waveform about a rotation angle. The near-sinusoidal waveform has a concave part in a center of a magnetic pole. The stator is faced with the rotor magnet. The coil is wound in the stator.</p> |
