| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit for simultaneously driving a plurality of brushless motors connected in parallel. SOLUTION: Each phase of brushless motors 1 and 2 is connected in parallel with a drive driver 3. Rotor position sensors 4 and 5 are used to detect the position for flowing a current with a regular continuity angle in each of u, v, and w phase coils. Each position detecting signal of magnetic pole detecting elements 4u, 4v, 4w, 5u, 5v and 5w of the rotor position sensors 4 and 5 is input in a sensor switching circuit 6. In the sensor signal switching circuit 6, each position detecting signal on the same phase is switched for each half cycle of an oscillation signal (P) of an oscillator 7, and a corresponding motor is controlled. In addition, each motor is driven by the drive driver in synchronized state for each cycle of a frequency divider, and a circuit for driving a plurality of brushless motors can be manufactured at low cost. |
