Hi, I need to replace a fan-motor with the following specs:
Model ZYD-2J
Shaded-pole induction motor
AC 115V 60 Hz 30W .6 A
1850 rpm

However, I have not found one with these specifications. The closest with respect to rpm is 1550. Can I use this one?

 

Is this a situation where the blades of the fan slip onto the motor's shaft? If so I'd be reluctant to use that motor since the air moving capacity would obviously be less.

I wouldn't resist a small upgrade to the motor, for instance 2,000rpm, as long as it doesn't draw much more current. You also want quiet. And make sure you get the right shaft diameter.

Looking a bit more it seems like all the replacements for that model are rated at 1,550 rpm. Where does the 1,850 number come from? Maybe it's a smudge on the label?

https://www.ebay.com/itm/146873199571

 

Model ZYD-2J
Shaded-pole induction motor
AC 115V 60 Hz 30W .6 A
1850 rpm

That appears to be in error.
At 60Hz, the maximum (synchronous) rpm for a 4-pole induction motor is 1800 RPM, but runs slightly below that due to slip under load.
I would expect the 1550 RPM motor to work satisfactorily.

If you can fit in a higher powered motor, it would run a little faster, since there would be less slip for a given load.

 

TAt 60Hz, the maximum (synchronous) rpm for a 4-pole induction motor is 1800 RPM, but runs slightly below that due to slip under load.
I would expect the 1550 RPM motor to work satisfactorily.

BTW, an induction motor can never be synchronous. It runs asyncronously.to retain induction.

 

Hi, I need to replace a fan-motor with the following specs:
Model ZYD-2J
Shaded-pole induction motor
AC 115V 60 Hz 30W .6 A
1850 rpm

However, I have not found one with these specifications. The closest with respect to rpm is 1550. Can I use this one?

If lower Rpm, will be lower Cooling,I think, what other electric specifications?

 

BTW, an induction motor can never be synchronous. It runs asyncronously.to retain induction.

Of course.
Didn't mean to imply it did.
Just meant that synchronous is the maximum theoretical speed it could run, so it would seem to be an error that the rating for his fan is 1850RPM with a 60Hz input.

 

I was so focused on the air moving capacity that I didn't even look at the type of motor and the implications.

The various replacement motors for that model number are probably fine and run exactly how the original did, despite the rpm label difference.

This likely wouldn't fit mechanically but note the bump up to 3,000rpm. They're a bit loose with their specs (cite 1.35A draw when the photo clearly shows 0.135A), so who knows.
https://www.amazon.com/dp/B07926FG1Q/

 

Amazon a little loose with the specifications? Naaa, that’s simply impossible!
Hope people realize that I am being sarcastic.

 

This likely wouldn't fit mechanically but note the bump up to 3,000rpm.

That appears to be a 2-pole motor and would likely would have a difficult time driving a fan designed for <1800RPM.

They're a bit loose with their specs (cite 1.35A draw when the photo clearly shows 0.135A), so who knows.

Given that it's rated at 60W power output, 1.35A sounds about right for a 120V fan, given the low efficiency of shaded-pole motors (i.e. typically about 26%).

 

Refrigeration Fan Input 22W Output 4W 1550RPM 115V Freezer Fan Shaded-Pole Induction Motor For Refrigerator ZYD2J-22

I would just order a replacement from Amazon or any number of suppliers. That's a very common motor, I see them for about $30.00 USD.

Ron