Connect with us

Help with slowing down and reducing the noise on a shaded pole 230VAC fan motor

Discussion in 'Sensors and Actuators' started by DIYGuy, Apr 27, 2018.

Scroll to continue with content
  1. BobK

    BobK

    7,680
    1,685
    Jan 5, 2010
    Yes, I understand that. My warning is for when he puts that one back in the fan he borrowed it from and buys a capacitor for this fan.

    bob
     
    Minder and hevans1944 like this.
  2. DIYGuy

    DIYGuy

    7
    0
    Apr 27, 2018
    I was distracted with some urgent matters.

    Thanks Minder and BobK for further clarifying how this thing should be set up.

    After testing with a 2µF capacitor from an old PCM, I bought and installed a 1µF. It was sufficient enough to slow down the fan and make it quiet.

    However, instead of the usual Off-Hi-Med-Lo setting, it's now functioning as Off-Lo-Med-Hi. How is this happening?
     
  3. duke37

    duke37

    5,329
    750
    Jan 9, 2011
    I suggested a 1μF capacitor in #11. Nice to know my guess was reasonable.
    I also suggested that the switch could operate in the reverse direction. This is due to the supply to the motor being changed from constant voltage to constant current, defined by the capacitor.
    With the voltage supply, the higher the impedance of the motor, the less the power.
    With the current supply, the higher the impedance of the motor, the more the power.
    The impedance looks to be changed by changing the number of turns in the coil.
     
  4. DIYGuy

    DIYGuy

    7
    0
    Apr 27, 2018
    Thanks duke37 and to everyone else who helped walk me through this project. After more than eight hours of continuous operation, the fan assembly is still working without any adverse effects.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-