| 摘要 |
PROBLEM TO BE SOLVED: To provide a brushless motor driver which does not use many interruptions even when the number of motors is increased. SOLUTION: When the position detection time interval of brushless motors 1a, 1b, 1c are calculated, a control circuit 2 calculates using this detection time interval the power supply switching timing and start timing, repeats the commutation by sequentially switching MOSFET 16u, 16w, 10w, 10v, and thereafter issues interruption for position detection of a rotor of the brushless motor 1a. Since interruption is conducted sequentially, only 1-channel interruption is required as a timer in the control circuit 2 to drive the brushless motor 1a. Consequently, drive control of the three brushless motors 1a, 1b, 1c can be realized using a 3-channel timer. |
