So I am experimenting with a few ideas we (myself and 2 others) have to build an efficient generator.
The coil we have designed is very hard to wind and i was wondering if I cut the wire (or lets say i ran out) an I just sand off the enamel solder the new wire and put some enamel or shrink wrap on the joint?
Hi,
It sounds ok that you want to solder and then shrink wrap the joint but maybe you wish to consider having some more flexibility for your generator: bringing out those joints to the outside as if you deliberately have made taps on the windings, the advantage being able to use more or less number of turns, for adjusting output voltage etc. Doing either way, the joints or taps will not influence badly the operation at all.
Gyula
Quote from: Enigma516 on January 09, 2013, 10:13:33 PM
So I am experimenting with a few ideas we (myself and 2 others) have to build an efficient generator.
The coil we have designed is very hard to wind and i was wondering if I cut the wire (or lets say i ran out) an I just sand off the enamel solder the new wire and put some enamel or shrink wrap on the joint?
As Gyula said, it should be just fine to solder a new length into the existing one.
If the windings are likely to get hot in operation you could also consider a small amount of Polyimide tape around the solder joint. Polyimide is nice and flexible, but very heat resistant and a good insulator.
It's sold under the name 'Kapton' and its handy to have around the lab!
I love that idea, thank you very much
Quote from: gyulasun on January 12, 2013, 03:16:41 PM
Hi,
It sounds ok that you want to solder and then shrink wrap the joint but maybe you wish to consider having some more flexibility for your generator: bringing out those joints to the outside as if you deliberately have made taps on the windings, the advantage being able to use more or less number of turns, for adjusting output voltage etc. Doing either way, the joints or taps will not influence badly the operation at all.
Gyula
Do you have a good source for Polyimide tape ?
Quote from: Madebymonkeys on January 12, 2013, 06:16:16 PM
As Gyula said, it should be just fine to solder a new length into the existing one.
If the windings are likely to get hot in operation you could also consider a small amount of Polyimide tape around the solder joint. Polyimide is nice and flexible, but very heat resistant and a good insulator.
It's sold under the name 'Kapton' and its handy to have around the lab!
Quote from: Enigma516 on January 14, 2013, 04:07:33 PM
Do you have a good source for Polyimide tape ?
Yeah, Farnell, RS, Newark, Digi-Key - they all sell it. If you don't have an account with any of these guys then eBay is also good - search for Kaptop Tape. TBH eBay is probably the cheapest source but delivery times are (as you probably know) variable - Farnell etc can normally deliver next day if ordered before 9pm (in the UK at least).
Incidentally, if you do buy components and materials regularly an account with one of the above is very useful!
Are you sending your coil to Mars?
If you are operating on Earth, then I would imagine that ordinary heatshrink tubing will be good enough. After all.... what is the wire itself insulated with, before and after your join?
Due to a bit of miscalculation on my part, one of my TinselKoils needed a couple of joints in the secondary. I used Kaptan-insulated wire-wrap wire for the coil itself, but for the joins I just used ordinary heat-shrink and a wrap of electrical tape for appearance sake. It works fine. But if I were going to Mars with it, I'd rewind the whole thing with a single length of wire.
In the photo below, the yellow wire on the lower half of the secondary is joined to the black wire on the upper half, underneath the band of red vinyl electrical tape. The actual shrink-wrapped joint can be seen as a little bump under the tape.
Seein as this threads about coils' Does anyone know why my coils hummig??
Anyone know away of dampening the pitch is too high it hurts please play
nice Mrs coil Mr rotor wants to raise your pulse! Stop whining! Could i put a znr capacitor across the
coil or something? I know its something to do with occilating?!
Quote from: colzilla on February 10, 2013, 11:24:34 PM
Seein as this threads about coils' Does anyone know why my coils hummig??
Anyone know away of dampening the pitch is too high it hurts please play
nice Mrs coil Mr rotor wants to raise your pulse! Stop whining! Could i put a znr capacitor across the
coil or something? I know its something to do with occilating?!
Hi colzilla,
I think your coils are loosely wound, applying electrical varnish will help...
Thanks. Got my first rotor spinning :) weird thing is I got a 1.1 bifilia wound coil about
500 turns not sure awg driving with a reed switch.
Got it
positioned right took awile lol
anyway start of wind1 is connected to reed switch then the other end goes to ground. The end of wind 1 goes to positive. Nice and simple. Heres where I'm scratching my head.
Wind two goes straight to a bridge rectifier and the + - are connected to each other..
It doesn't stall or slow down it speeds up? Same thing with if I put a cap there.
Its weird..
I'm gonna hot glue my coil. Thanks. I guess its because its oscillating or something.
Cheers
col