Lister-Petter Generator Wiring Diagram!!!

[Philbo1983]

Hi guys! Hopefully someone can help me. I have what I think is a lister-petter tr1 which has no I’d badge. The engine is running, however I am not getting power from the generator side. I am aware that the control board is not the original and not suitable. Before I throw more money at it, I wanted check everything over. However finding a wiring diagram for this particular manufacturer (Thrup Stroud) is proving very difficult.

I have been in touch with Lister-Petter, Mead plant uk, Sleeman & Hawken, Bob (off here) and some other guys up my neck of the woods.

I would really appreciate if someone can get me a wiring diagram. 🙏

Please see pictures below…

[ajaffa1]

Hi Phil, Lister owned a company called Brush which made generator heads. Hawker Siddeley took it over. I do not know if they redesigned the generator heads they made. It could be that you have a brush style generator head which incorporates a starter motor. Photos of the slip rings/commutator and all surviving wiring would certainly help. We may be able to create our own wiring diagram.

Bob

[Philbo1983]

Hi Bob,

Thank you for your response once again. There is no slip rings, commutator or brushes on this model. The best way I can describe with out stripping at down again for pictures, is that the rotor has many windings along with diodes. And the stator also has many windings with diodes connected. There is no physical electrical connection between the stator and the rotor. This would appear to work through induction??

[ThomasEriksen]

Hi,
That sound like a brushless generator, two parts rotor with diodes in between.That also means two part startor, one part sends field current to rotor and other part power out.If this sounds right, I would check resistance of the field part of the stator first, if ok, I would flash it like a normal generator

[ajaffa1]

I`m with ThomasEriksen, it does sound like a brushless generator. Check the condition of the windings with a multimeter, also check the condition of the diodes. The worst thing for a generator is to shut it down under load, this causes the amps to rise as the voltage drops, high currents can burn out windings and diodes, it can also destroy the residual magnetism needed for it to start to generate when next started. If everything checks out OK flash the field windings to restore residual magnetism.

Bob

[Philbo1983]

Good morning Bob. Good morning ThomasEriksen.

This sounds exactly what the generator is. Could I please ask, what resistance would we expect on this type of winding? And also, what voltage should be used when flashing? We are assuming that we would flash onto the power output windings?

Many thanks

Phil & David

[ajaffa1]

Hi Guys, I would be expecting to find resistances of between 2 and 20 ohms. The diodes should have zero ohms in one direction and megaohms in the other, most diodes have a white or silver band around them at the negative end.
You need to flash the field winding/windings to recreate an electromagnet field/fields. I generally use a 12 volt car battery for this. I would recommend having a look on YouTube before attempting this, try to find a generator that has the same configuration as yours and then follow their instructions. It is also possible to re-energise a generator by using an electric drill or angle grinder, start the generator, plug in the power tool, pull the trigger and manually rotate the chuck in the correct direction. If you are lucky this will produce enough of a back EMF to allow generation to ramp up.
Let us know how you go.

Bob

[ThomasEriksen]

Do you have picture(s) of the wires coming out of the generator and external diodes?

[Philbo1983]

Good afternoon gentleman,

Thanks Bob for your information. I will let you know how it goes.

Hi ThomasEriksen there are no diodes on the outside of the generator casing. However there are diodes integrated into the winding of both stator and field coils. I will try upload a picture of the wires that can be seen outside. However I struggled to upload the last images to my original post.

Our thoughts are to strip it back down and have a better look. Hopefully get some decent photos.

It will not be straight away due to other commitments.

To be continued gentleman…

Have a lovely weekend

Phil 👍