| 摘要 |
PURPOSE:To accurately control to position by providing a D/A converter, and a driving circuit made of a pulse width modulator independently of the phase coils of a motor, and individually controlling them. CONSTITUTION:In a brushless motor controller, an encoder 2 is added to a motor 1 to output a pulse signal responsive to its rotating position, the pulse signal is counted by a counter 3, and the counted value is applied to one input terminal of a comparator 4. On the other hand, a CPU 5 applies a theoretical value (target value) to be of a target to the other input terminal of the comparator 4, and its difference is input to a CPU 5. In this case, the motor 1 is of a brushless motor, having motor coils 1a-1c, which respectively have independent driving circuits 8a-8c. The circuit 8a is composed of a D/A converter 6a and a pulse width modulator 7a, and the others are similarly composed. Thus, the phase coils 1a-1c of the motor 1 are individually and independently controlled finely. |
