| 摘要 |
PURPOSE:To operate a motor at a fixed speed of rated number of revolution by operating the motor by repeating conduction or non-conduction and setting the conduction or non-conduction time within a range of several cycles of supply frequency. CONSTITUTION:When strong air flow operation is selected and a switch SW3 is pressed, a microcomputer IC3 decides input signals with the ON of the switch SW3 with the inputting of signals through a No.5 terminal, continuously generates output signals corresponding to the decision to a No.19 terminal, and inputs the signals to a No.2 terminal of a transistor array IC2. Accordingly, a Triac Q1 is at ON, 100V of an AC power supply AC is applied to the fan motor FM through a terminal for high speed, and the motor can be operated at high speed. |
