I have a new project which is a Tyre Balancer Machine

[Gregory]

If you connect 0 to a 9 you will only get 9 volts a and connect 0 to b9 you will only get 9 volts.
I do not under stand could you give me a Circuit

 

[Diver300]

You need to disconnect the two blue wires from each other.

Put white rings on the blue wire that is connected next to the red wire with white rings.

Connect the red wire with white rings to the blue wire that does not have white rings. That will be your centre tap

Check the voltage between the red wire with no white rings and the blue wire with white rings. That should be 18 V.

 

[Gregory]

There is no blue wires with white rings

 

[Diver300]

There is no blue wires with white rings

You need to separate the two blue wires, and distinguish between them. I said

"Put white rings on the blue wire that is connected next to the red wire with white rings"

I meant connected on the same side of the transformer as the red wire with white rings.

 

[Gregory]

I have marked. The blue wirer with yellow rings. Same side as the red, white wirer with rings.
i joined the blue , yellow ring wires to red ,white wirer.
Then joined the blue wirer together with the red and there was a spark so I disconnected red and blue.What do you suggest. Sorry about being a pain. Could you give me a circuit Digram. Of what you want.
thank you Greg.

 

[Diver300]

That's what you need.

It's much easier to explain with the wires all different colour.

The spark won't have damaged the transformer. It will get hot if you leave it shorted but a few seconds won't hurt.

You just need to check that there is 18 V between the Blue wire and the Red/White one when it's wired like that.

 

[Gregory]

I have achieved 18 Volta as you can see by the photos.
Where do I go from here Can I wirer it onto the board.
Blue connected to the red white
red, Blue yellow connected to multi meter

 

[Diver300]

This is how you can connect it.
Check the DC voltages on the capacitors when you've done that.

 

[Gregory]

I have connected every thing up .The capacitor. Reading is 12.7 volts DC.
On the opposite side where I have solder the wires is the any thing to be don there As this is where the primary winding for the old transformer was
on the photo of the board you have L and N marked is this where Live 240 v and neutral is connected from Mains Supply

 

[Diver300]

What is the reading on the other capacitor? That should be about -12 V.

You don't have to do anything where the old transformer live and neutral were connected. I don't know how you are supplying the new mains transformer, and you could take wires from where it says L and N on the picture, but you could just have a separate supply.

 

[Gregory]

The other capacitor had a reading 12.2Volts DC.
I have supplied the transformer with 240v Ac from a separate supply.
what supplies the motor.

 

[Diver300]

The motor supply isn't changed by changing the transformer. The motor will still be supplied through the circuit board and relays.

You still have to have a mains supply to the circuit board for that.

 

[Gregory]

How does the relay get the 240v supply.
Thank you very much

 

[Diver300]

How do the relay get the 240v supply.
Thank you very much

I just edited my earlier reply, and I hadn't seen your new question.

The relays get 240 V from the screw terminals on the circuit board. You still need that supply to get the motor to work. The transformer runs the electronics, which controls the relays, so that is needed as well.

 

[Gregory]

Thank you very much. I will check that out tomorrow.

 

[Gregory]

i removed the relays as they are faulty
I will supply a photo of the board can you explain to me how I get the relays to switch to enable the motor to run.
It was a 3 phase but I am changing it to 240 v thank you

 

[Diver300]

You can probably run the three phase motor from a single phase if you add a start capacitor.

I think that you will need to replace the relays.

 

[shortbus=]

You can probably run the three phase motor from a single phase if you add a start capacitor.

How? Can you elaborate on that please?

 

[Diver300]

You can probably run the three phase motor from a single phase if you add a start capacitor.

How? Can you elaborate on that please?

In the case of a motor that can be connected star for 380 - 420 V and delta for 200 - 240 V, the first thing to do is to connect for the correct voltage.

Then connect the power between two of the phases of the motor, and then the capacitor connects to the other phase. The other end of the capacitor is connected to one of the power wires.

The start torque will be very low compared to running the motor from three phase. The efficiency and maximum power will be somewhat less than compared with running from three phase.

Using a capacitor with a three phase motor to run from single phase has been used on commercial products.

 

[Gregory]

Good Morning from AU
I have the 3 phase motor connected with 240 v Ac and running in the correct direction .There are 2 capacitors connected to the motor . The caps are 7;uf and 8 uf . The start torque and running torque are good .
what I need to know is how do I get the motor to start up when connecting to the board.and pushing start
I have ordered 3 new relays for the board.