The Tesla Coil (L1, L2) together with the spark gap, generates a high output of voltage when coupled together. When the primary is tapped out over nine turns or so, the field flux that is generated couples in the entire secondary winding all the way to the top turn on the coil. My primary coil, sadly enough, was a total of only 8 turns.

The Tesla coil is a very souped-up transformer.

How to make a spiral shaped primary coil for a Tesla coil, in this case my mini/small spark gap Tesla coil, along with tuning and demonstrations. JAVATC performs millions of iterations for accuracy during the total system computations (it takes time). The Tesla coil provides a high voltage demonstration of a resonant transformer. On this page are listed Tesla coil formulas for a reference to those who prefer to make calculations on paper.

My tesla coil’s performance was bottlenecked by, of all things, my primary coil!

The problem was with the primary coil.

Here, the primary coil emits huge amounts of current into the secondary coil to drive the secondary circuit with maximum energy. A cone shape, or conical primary is also very common.

That’s a lot! I recommend using a flat coil.

I had the primary coil tapped at coil number 8, with improving performance as the number of turns increase.

The primary is driven with 340 volts, so the secondary will have 340V x 300 = 102kV across it.

The primary consists of a small number of loops made from a large conductor. There are three important mathematical nuances or foundations upon which the operation of the Tesla Coil is built.

The primary coil is usually flat, called a "pancake" coil. But not quite a quarter million.

Fix the beginning of wire and wind, actually you don’t need to count every turns, simply multiply diameter of wire to number of turns you planning to make - it’s going to be your winding length. The secondary has a large number of turns of small wire.

Mathematical Nuances of the Tesla Coil. The number of turns on the secondary coil is not directly comparable to the primary:secondary ratio known from normal power transformers. This calculator will equate all linear geometry's (flat, helical, cones, and inverse cones), closewound or spacewound. Although primarily used for entertainment purposes, with its long electrical arcs and noise, it also provides a path to understanding basic RF resonant circuits; just part of the many considerations involved when designing RF circuits.

Calculate Turns.

When we change the number of primary turns tapped, to alter the frequency, we do not what to change the coupling as well (coupling is adjusted by changing the height of the secondary).

The Tesla coil works on a principle to achieve a condition called resonance. The large Tesla coil shown above is part of a demonstration show called "The Wonders of Physics" by physics professor Clint Sprott of the University of Wisconsin.

Below is a table of formulas on this page. We make this fixed connection to the inner turn because one of the parameters of a Tesla coil is the coupling, or distance, between the two coils.

It has 500-1500 turns turn to turn, my is about 1000 turns.

Once again, I use the … Generally, larger Tesla coil use flat primaries and smaller coil can use cone shape primaries.

Let’s briefly consider what would happen if it were a perfect transformer. A good primary coil will end up being about as wide as the secondary coil is tall. The spark gap plays the role of the switch in the primary circuit.

accurately for their primary or secondary coils.. This quick calculator is available for coilers who need to equate the number of turns, radius, height, etc.

This coil has the ability to produce output voltages up to several million volts based upon the size of the coil. It is not important with fewer or more turns, but more to create a secondary circuit between coil and topload that has a impedance that matches the load presented by the sparks that we want to create.

Let’s begin from the most complicated part – secondary coil. The primary winding has six turns and the secondary has about 1800 turns. Some smaller Tesla coils can use a vertical helix shaped primary. Tesla Coil Working Principle.