| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor driven device by which low vibration and low noise during the driving of a motor can be attained by using a simple constitution. <P>SOLUTION: The motor driven device is provided with a power feed device 150 which feeds power to three-phase drive coils 111-115, Hall elements 121-125 for three phases which are arranged so that detected waveforms have angular differences of about 120 degrees at electrical angle, respectively, in order to detect the rotational position of a rotor provided with a magnet magnetized to the N pole and the S pole; addition and subtraction circuits 131-135 for three phases which add and subtract two of the output signals from the Hall elements 121-125 and output a logic signal; and a logic compositing circuit 140 which generates a power feeding pattern signal from the logic signal to the drive coils 111-115. Signals which are generated by inputting the signal of the Hall element for two phases to each one phase of the addition and subtraction circuits 131-135 are set as rotational position detecting signals of the rotor for one phase. The driving of the motor is executed by generating the power feed pattern signal. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
