| 摘要 |
PURPOSE:To obtain the rotary signals of the motor without using other parts of a motor proper by mounting a rotor rotary signal synthetic circuit onto the same substrate as a magnetic sensor detecting the position of the magnetic pole of a rotor. CONSTITUTION:Magnetic sensor blocks 1a, 1b, 1c detect the positions of the magnetic poles of the rotor 11. The output of the magnetic sensor blocks 1a, 1b, 1c is inputted to a pulse synthetic block 2, and pulses required for driving coils 4a, 4b, 4c are synthesized. Drive circuit blocks 3a, 3b, 3c control the quantity of currents supplied to the stator coils 4a, 4b, 4c and timing in response to the output of the control blocks and the pulse synthetic block 2. The magnetic sensor blocks 1a, 1b, 1c and the pulse synthetic block are formed onto the same substrate. |
