| 摘要 |
PURPOSE:To steplessly control the revolution of AC motor blower by a method wherein a DC motor where the variable resistor on the speed control circuit may be driven to change the resistor is provided. CONSTITUTION:In order to change the speed of the AC motor blower 8, turn the remote switch 4 on the contact 4a side. By this operation, the DC motor 8 is supplied with power through the intermediary of the diode D1 to be driven in the specified direction. The DC motor 9 being mechanically interlocked with the variable resistor on the speed control circuit 7, the resistance values of the variable resistor are steplessly changed continuously changing the revolution of the AC motor blower 8 by means of the speed control circuit 7. Assuming this revolution to be in the accelerating direction, turn the remote switch 4 on the contact 4d side to reverse the DC motor 9 changing the resistance value of the variable resistor in the reverse direction, decelerating the revolution of the AC motor blower 8. |
