Small Squirrel cage/Furnace fan wiring Multiple speed

[Cue]

I picked up a few of these fans and plan on using them in my shop to cool off. I was wondering if there was any way to vary the speed on them, I am pretty sure there isnt on a AC Single phase Induction motor but thought I would check here. The Blue and Red wires make it run full speed. The Brown,Orange, and White wires seem to go to some sort of sensor behind the fan. The sticker pictures are from the motor and from the fan itself. Im not sure what they were originally used in?

 

[M1N1ON]

could you just use a rheostat?

 

[Bert_]

could you just use a rheostat?

Way to vague... A dimmer will not work but a fan speed control should.

That is a permanent split capacitor motor. They can be controlled with any fan speed control of the correct amp rating.

Most other kinds of induction motors cannot be controlled this way.

 

[Cue]

What kind of fan control do you mean, do you have a link to one specifically?

In watching this video they cant be controlled with any type of dimmer that varies the voltage, only by varying the frequency and not many single phase VFD's out there and im sure that would be too costly.

Way to vague... A dimmer will not work but a fan speed control should.

That is a permanent split capacitor motor. They can be controlled with any fan speed control of the correct amp rating.

Most other kinds of induction motors cannot be controlled this way.

 

[wyliesdiesels]

What kind of fan control do you mean, do you have a link to one specifically?

In watching this video they cant be controlled with any type of dimmer that varies the voltage, only by varying the frequency and not many single phase VFD's out there and im sure that would be too costly.

this one may work but need to verify the motor can work with solid state controls

https://www.globalindustrial.com/p/...7TrIlCWMCfcpRJvHqykMUtBcE43NVBUxoCLeMQAvD_BwE

 

[Cue]

Think this one would work?
https://www.amazon.com/dp/B0714FFG4F/?tag=atomicindus08-20

 

[Bert_]

The key is that this motor is a permanent split capacitor motor. At least that's what I'm guessing based on the run capacitor attached to the side. These are very common for HVAC motors. They are also very easy to control speed.

Your speed control does need to be rated for a minimum of 3 amps. From what I saw looks like 5 amps is a common size.

 

[Cue]

Where is that picture from, got a link?

The key is that this motor is a permanent split capacitor motor. At least that's what I'm guessing based on the run capacitor attached to the side. These are very common for HVAC motors. They are also very easy to control speed.

Your speed control does need to be rated for a minimum of 3 amps. From what I saw looks like 5 amps is a common size.

 

[Cue]

I picked up one of these controls and got it today, it works to vary the speed but on anything lower than 3/4 speed it make a loud buzzing type noise while running.

https://www.amazon.com/gp/product/B015X23BHS/?tag=atomicindus08-20

 

[Cue]

Any idea why the buzzing?

 

[Bert_]

Some motors buzz on a variable speed control. Hard to say if it's a problem. Does the speed control work slow to fast other than the buzzing? Does the motor get hot?

Could be a problem with the speed control or the motor. Of course all this is assuming that you have a PSC motor. It sure looks like one to me but that's no guarantee.

 

[Cue]

It seems to work fine, I only ran it for about a minute so not long enough to see if it gets hot or not, its just loud and annoying so I probably wont use it other than full speed.