Re: Washing machine motor

["davep" <davep-at-xxxxxxxx> (by way of Terry Fritz <twftesla-at-xxxxxxxxxx>)]

Tesla list wrote:
 
> Original poster: "Kelly & Phillipa Williams" <kellyw-at-ihug.co.nz>

> I recently went to our local landfill

	Good stuff.  Also known to yield disused Oil Burner
	transformers.

> and brought home a largish AC induction motor
> from the bottom of a large washing machine. The faceplate says,

> "Made in Romania
 
> Motore Asinchrono Monofase
>        TIPO MSI-461   220/240V   50Hz   CL.B
?	'CL, B' 'feels' like a temperature rating.  Maybe.
	
>	Poli           2              12
?	Poles		2              12

>        Potenza        0,21 HP        0,047 HP
?        power          0.21 hp        0.047 hp

> Velocita             2800 g/1        450 g/1
? speed/rpm            2800 gyration (revs)/min 
?  (overflow line)                     450 rpm...

> Condensatore         14uF
>                      450V            350V   "

> The motor has seven spade terminals in a
> plastic box mounted on the motor.
 
> >From this I deduce that the motor has two modes of operation.
>> The two pole mode of operation would be for high speed, probably
>> for the washing machine spin cycle.

	I'd expect so.  Such motors are like that in the USA.
	(Which does not mean they are elsewhere, but it seems
	likely....)

> The twelve pole mode of operation would be for slow speed for the
> washing cycle.
 
> I am confused about the horse power ratings, wouldn't the twelve
>pole mode of operation yield a higher horsepower?

	Not necessarily.  HP is speed times torque.  Cutting the
	speed drastically will reduce the HP.

> I cannot find any dead poles, or any start or run windings, despite
> reading syncmot.zip till my eyes are blurry. The whole
> circle of laminated metal "lines" around the armature seems to be wound
> with an equal amount of wire. All I can say for sure is that there
> are two different guages of wire in the windings. (big and small)

	Offhand, I'd expect capacitor start (the 'condensatore'
	item...)  The size listed looks like a 'start' cap.
	Is there a cap with it?  Is there one left at the landfill?

> I would like to sync this motor, and my current plan is work out which
> terminals are used to run the motor in its two pole mode,
> and then grind two very small flats and gradually enlarge them until a
> notch in the shaft stays in the same position relative to the case.

	Others 'here' are more skilled in this art than i.

> Could someone Please give me some advice on all of this?

	Sometimes scheamtics are on a label on the back of the
	washer?

	best
	dwp