BRUSHLESS MOTOR DRIVING EQUIPMENT

摘要

PURPOSE:To provide a low-cost and highly reliable driving equipment of a brushless motor which is to be used in various kinds of OA equipments. CONSTITUTION:At the time of cutoff of driving power, the operation of a driving power supplying means 15 is stopped and driving current is reduced to a sufficiently small value and then driving transistor 26, 27 of a motor driving means 2 are turned to a non-conduction state and thereby the supply of power to a brushless motor 1 is completely cut off. By this method, the voltage of output terminals 17-19 (OUT1-OUT3) of the motor driving means 2 is kept sufficiently small at the time of cutoff of driving power.