| 摘要 |
PROBLEM TO BE SOLVED: To prevent a large current from flowing into the winding of a brushless motor, even if a start command is given in the condition in which the brushless motor is rotating. SOLUTION: A drive control circuit 28 outputs a specified pattern of current application signal which turns on all of transistors T4-T6, so as to charge the capacitor 13 of the charge pump of a base drive circuit 10 and execute the initial processing to detect the short circuit fault of the transistors T1 to T3, after determining that the condition of rotation stoppage has materialized, by three seconds passing from the time when a start command is given by a microcomputer 10 during the rotation of a brushless motor 4. |
