What kind of motor is this?

[Lucien Nunes]

Interesting old machine still in use. I've talked about similar motors before but not this type AFAIK. To the trained eye, the shape of this one is a giveaway, from which you can identify its maker and the technology it uses, and probably say something about the available electrical supply. In any case the shape should tell you something. Note that the bare aluminium covers are non standard, these would normally be steel mesh vent grilles.

 

[telectrix]

looks like the starter motor on my van.

 

[Lucien Nunes]

It's got a handle as well though hasn't it?

 

[James]

looks like and old DC motor to me.

 

[westward10]

Electric?

 

[Lucien Nunes]

old DC motor

Not an unreasonable deduction, but this one won't work on DC at all, not even badly.

 

[James]

I am suspecting it is a brushed motor of sorts.

 

[westward10]

I was going to say universal but that would run on dc.

 

[westward10]

Slip ring induction.

 

[Lucien Nunes]

Slip ring induction.

Another good inference, but no sliprings to be found here. And your logic is correct, it can't be universal as that would run on DC.

a brushed motor of sorts

Yes, it does have brushes.

 

[westward10]

Synchronous.

 

[Lucien Nunes]

Nope, not synchronous

 

[Mark42]

Split-phase (180 degree) on a farm?

Reasons for my guess:
1. Shape of the casing.
2. Only a farmer would get away with such an antique installation!

 

[AJshep]

Is it Stepper motor, I'm guessing because of the handle.

 

[westward10]

Is it rotor resistance controlled.

 

[Lucien Nunes]

Is it Stepper motor, I'm guessing because of the handle.

I meant I thought Tel's van had a starting handle!!

Is it rotor resistance controlled.

No, and all the rotor-resistance controlled motors I've ever seen have had sliprings so would have been a positive result for your previous question about that.

Split-phase (180 degree) on a farm?

As far as motors are concerned, a split-phase supply is generally used as a single-phase supply of the higher voltage. So a 230-0-230 installation would have 460V single-phase motors of otherwise ordinary construction. As it happens, this motor could optionally be used on 460V so there is a slight clue here, although not in any way to do with farming.

Historically there were special 2-phase motors for 2-phase supplies (note this is different to using two phases from a 3-phase supply as they were usually 90° apart) but again not relevant here.

Yes it's old, but we have plenty of older plant in use so not exceptional at least in my sphere.

Keep on with suggestions but I've got a meeting soon so might not reply for a while.

 

[marconi]

As a teenager I once worked on the repair of an ac repulsion motor which had a wound rotor with commutator and brushes whose axis was displaced by a few degrees from the field axis, the field coil being supplied directly by mains ac supply. The brushes were shorted I seem to remember. And I vaguely remember the displacement of the brushes could be changed by a handle for speed control.
It powered a butcher's screw meat mincer. Is the image of a similar motor? And made by BTH?

 

[telectrix]

end of the day, it's skip fodder.

 

[PEG]

.....philistine....

 

[PEG]

....is it converting anything?