Fan speed controller

Thread Starter


Joined Oct 23, 2015
I have 2 Fasco fans (50D501-80T 240V 0.38 Amp) these will be used in an incubator and I would like to control their speeds.I have read that some fan motors need specific controllers or they burn out quicker.What type of controller would you suggest ? Below are some links for the motor and also some speed controllers. Many thanks .......


Joined Sep 17, 2013
The links don't give enough info to indicate the motor type, but seem to show a single-phase induction motor . The suitability of the controller would depend on motor type.


Joined Jul 18, 2013
The pictures show an AC induction motor.
One of the controllers in the OP links shows a DC motor controller, the other appears to be for a dedicated motor of some kind that has 5 leads.
It is not completely clear in the motor pic's you show how the initial phase shift is done, in theses smaller motors it is usually by a shorted copper turn (shading coil).
I would try one of the Triac power tool controllers, they tend to work OK on shaded pole motors.

Thread Starter


Joined Oct 23, 2015
I do have a couple of these I purchaced them to use in brooders they are supposed to be pulse proportional .Would they do the job ? ............. ........................................
10000W SCR Digital Voltage Regulator Speed Control Dimmer Thermostat AC 220V 80A The Thermostat use the new two-way high power thyristor, as the current can up to 80A, it can solve the problem of over-current electric wire in case of cooling is too small to cause the resistance; And also it can easily adjust the output voltage of electricity in between 0-100% (220 of 100 volt regulator, nonlinear)


  • Operating Voltage: AC 220V
  • Maximum Power: 10000W
  • Max Current: 80A

  • Electric furnace, water heater, lamps, small motor, electric iron etc.
How to use:

  • Connect this device with lamp or home appliance or electric circuit, then rotate the knob for dimming, speed, voltage, temperature control.