Schematic overview
AC motor 1,5 A | variable speed control | softstart
Solution description
Variable speed control for AC fans with single-phase motor. The maximum motor current is 1,5 A. The fan speed can be set via the rotary knob from low to high speed. In utmost counter clockwise position, the motor is disabled. When turning the knob clockwise, the motor will accelerate from low to high speed. The low speed limit can be adjusted via an internal trimmer. The supply voltage is 230 VAC. The AC fan speed is controlled by reducing the motor voltage via phase angle control - Triac technology.
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