| 摘要 |
A motor driver according to the invention comprises (i) an energizing unit supplying drive voltage and drive current to a motor including a moving body and coils, (ii) a speed-position detector detecting a drive speed of the motor and a position of the moving body to output a speed position signal including drive-speed information and position information. The motor driver also includes (iii) a reference signal generator outputting a reference signal, (iv) a phase signal generator using the speed-position signal, the reference signal, and a set signal to output a phase signal indicating a phase of the supplied drive voltage, and (v) a waveforms generator using the position information and the phase signal to output a control signal to the energizing unit. A phase of the supplied drive voltage is regulated to be proportional to the drive speed, wherein a degree of the proportion is set by the set signal. |
