Window Motor Replication

[ren]

Ive run 48v with the mps and mjl's. Theres a couple of vids on youtube of the old rotor on 36v. Testing on the 48v terminated early due to rotor instability. The Mps is rated @ 80v I believe, it should handle 50v easily. Be careful at higher voltages. You need larger resistors and such too.

[tjnlsn255]

Thanks Ren,

Any thoughts on my other questions?

Have a most excellent weekend....

Tj

[ren]

Your trigger resistance is probably to high. Thats what it sounds like to me.

[tjnlsn255]

Hi Ren,

With my SG circuit I can adjust the trigger with the 1k pot and I have gone from 0 ohms on the pot so that is 100 ohms fixed to 1k = 100 ohms fixed and it just changes the pitch of the hum as the magnets pass the coil.....

For my SG with my SG bifilar coil I run the 1k pot around 200 ohms .....

Thanks for any and all thoughts.....

Tj

[Mark]

Hi TJ

I agree with Ren. Get out an ohm meter and actual check the resistance again from the end of the resistor to the end of the pot and make sure it is only 100 ohms. The only time I've had a coil oscillate is when the trigger resistance was too high. Is there output when the coil hums and the rotors not turning? If there is, its oscillating, too much trigger resistance.

[ren]

and you can burn out your pot too...

[tjnlsn255]

Excellent.... got it working.... it was not the trigger resistance at all....

I had left my Bedini SG coil in position and even though I had disconnected it ... it was dragging the rotor as the magnets passed by..... I was going to use it as a generator coil so maybe when I get the 1/2 circuit built and use 24 volts it will not slow down the rotor.....

The window coil really does spin my heavy 12" rotor very nicely.....

Finally I am windowing......

Thanks for all the help and ideas!


Tj

[Mark]

Glad you figured it out TJ. If you lower the value of your base resistor to somewhere between 10 to 50 ohms it should give you more power when first starting. That way you may be able to leave your power coil near the wheel. Just a thought.

[tjnlsn255]

Hi Mark,

Because of the fixed 100 ohm resistor and the 16 ohms of the trigger coil the lowest I can go with my Bedini SG circuit is 116 ohms with the 1k pot turned all the way down.....

Its ok because I am going to build the 1/2 circuit now....

Do you know if I can use a larger transistor than 2n3904 for the trigger transistor in the 1/2 circuit?

I have a bunch of TIP120s and 2n3055s but no small signal transistors....

My Bedini SG circuit uses a 2n3055 on the trigger....

Can I trigger a 2n3055 with another 2n3055.... just a thought....

Be happy...

Tj

[Mark]

TJ

Not sure on the other transistors.

As far as your trigger just remove the 100ohm resistor and replace it with a 10-50 ohm resistor.

You can use the 3055's in your circuit but you'll need a 2n2955 I believe. Look at Ricks sight again he has 2 different schematics one using the 3055's and one with MJL21944's (?).

[tjnlsn255]

Thanks Mark!

I have the matching PNP 2n2955s... thanks....

I will look on Rick's site for the schematic ....thanks....

Tj

[ren]

You need a matching pair of transistors for the Power coil. PNP and NPN.

You can use 2n3055 and a Mj2955 or Mjl21193 and 94. Or any other pair you can find, they are commonly referred to as "complimentary".

For the trigger transistor you need something small. The MPSa06 works great, Id imagine there are plenty of others that can be used for this darlinton. Perhaps the 2n2222 or 2n3440 or something similar.

Regards

[tjnlsn255]

Thank you for the suggestions Ren!

Hopefully I will have pictures soon.....

Is free energy green....;-)

Tj

[tjnlsn255]

My crazy Bedini replication platform.....

This is a couple of pictures of my Bedini platform in window motor configuration..... I am testing out different windings with the SSG circuit...

Is free energy green?

Tj

[ren]

Nice TJ.

Im not sure if you have enough bolts holding it however

No seriously, that aint coming apart there anytime soon. What is the plastic you used?

Good to see someone else having a go.