OutdoorKing Repair Forum Forums General Discussion Forum Off Topics electric motor

Picked up this electric motor because it is different it is a
'Single Phase Repulsion Induction Motor'
What does all of that mean and where would it be used
Ian

The motor is an induction motor, once commonly known as a squirrel cage motor because of the construction of its rotor. Nowadays nearly all industrial-type, long life AC motors are induction motors. However if they are single phase, they will not self-start since they lack the rotating electrical field of a three phase induction motor. Single phase induction motors require some kind of special arrangement to start them rotating, then the starting apparatus is no longer required. For reasons of cost and durability, the starting apparatus is nearly always a starting-winding fed by a capacitor, turned on and off by a centrifugal switch so the extra winding was only powered up during starting.

The repulsion induction single phase motors used a different arrangement for starting, instead of the capacitor and extra winding. Frankly I've never even seen one, I think they become somewhat rare quite a long time ago.

This size motor was very common in washing machines. Many had capacitor start as grumpy said. Some then switched out that extra field but some had cap start, cap run, effectively making them work like two phase motors. Given the high current rating of 4 amps at 230 volts I'd guess this one is a cap run unit, especially as it seems to have an ability to reverse the rotation by repositioning the brushes, which wouldn't be something I'd expect to see on a cap start motor.

Capacitor start AC induction motors don't have brushes, but repulsion induction motors always do. Essentially, AC repulsion motors are a type of commutator motor, generally similar to a DC motor. Here is a short summary of the principle:

http://www.vias.org/kimberlyee/ee_23_06.html

Hello Ian and GM Grumpy

I know the other question was what one would be used on.
A quick search seems to suggest this:-

First seen on our shores as fan manufacturers - stand, ceiling, industrial
Originally imported by General Electric (Aust). Fans were a main line product for
decades. Note the ad. with William Adams. Adams was the manufacturer of the Presto mower!




In the thirties they seem to be a popular make on some washing machines:-



They also sold motors of all types for varied uses:-




The company is part of a global conglomerate now.
A bit of history here:- http://vintagemachinery.org/mfgindex/detail.aspx?id=1360

Hope this helps.
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JACK.