[ Ref. 190503 MMDigest and image
 [ http://www.mmdigest.com/Attachments/19/05/03/190503_045132_IMG_20190415_114652_01.jpg
 

In response to Marissa Beauchamp -- when I read the nomenclature on
your motor it became clear why you were having these problems.  The
most common low speed for an induction motor is 850 rpm.  Someone
replaced the original (probably 850 rpm motor) with a 1100/950 rpm
motor thinking "good enough".  Well, now we know it's not good enough
don't we?

For a given horsepower, a higher speed motor will have less torque.
When an induction motor is overloaded it slips phases, and every time
it slips a phase it pulls a large amount of current and that energy
goes toward heating the motor.

There are two ways to fix this.  You can pay about $150 plus shipping
(another $50) for a non-capacitor motor.  These motors are less
efficient but are cheaper than the capacitor motors.  Your motor pulls
4.4 amperes with a normal load.  Currently your motor is overloaded.
It is trying to run too fast, it is slipping phases, pulling too much
power and heating up horribly.  A similar size of induction motor with
no capacitor can pull 8 to 9 amps.

If you are willing to pay twice as much for a capacitor compensated
induction motor, the motor will start faster and cost less to operate,
pulling say 4 to 5 amps.  Clearly for this application the more
expensive capacitor compensated induction motor is the right choice.

You need to find a 1/4 horsepower, 850 rpm, capacitor compensated
induction motor.  That is likely to run you about $400.  A 1/3
horsepower motor can be used as well but just be sure that whatever
you use, it fits inside of your cabinet.  I hope this has been helpful.

Steven Reed
Plano, Texas