| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a DC brushless motor apparatus synchronously driven, even if there is phase difference between the magnetic pole position of a motor rotor and a sensor signal. <P>SOLUTION: Rotational position sensors 47a-47c are synchronized with the rotated rotor, and output gap signals G1-G1, corresponding to a gap between a sensor target 46 integrally rotating along with the motor rotor 62. A delay time calculating section 75 calculates a delay time Δt, based on a rotor rotational frequency f detected by a rotational speed detecting section 74 and a phase angle θ, previously stored in a phase difference storing section 76. A signal delay section 73 corrects the delays in the gap signals G1-G3 based on the calculated delay time Δt, and calculates the rotational position signals S1-S3. A motor driving waveform generating circuit 72 generates a waveform pattern of voltages applied to U, V, W phases in a motor stator 61, based on the rotational position signal S1-S3. <P>COPYRIGHT: (C)2007,JPO&INPIT |
