Plastic coated wire is too thick to make a good electromagnet, all the insulator area is diluting the effect of your coil. Don't use bare wire as the current will flow across the coils (short) rather than around in a spiral. Get the spiral as tightly wound as you can and the entire coil should spiral in the same direction (clockwise).

May 31, 2020 · That's what we want, so, for low-loss, high-freq RF coils we must avoid the close-packed windings. Buy a fancy scramble-type coil winder, and perhaps also wind your coils "pie-wound," as a stack of pancakes. But for DC or 60Hz, a close-packed coil is much smaller, but with the same gauss/watt value as a big mushy scramble-wound coil.

Mar 23, 2017 · Therefore, I am considering either making a rotatable "end cap" that the end of a simple coil winder can be pressed against, or possibly winding each axis on a single-axis bobbin and then transplanting to the multi-axial bobbin. However, in the latter case I am skeptical that dimensions would match up well and that the coil would stay together.

Jun 10, 2018 · While winding a coil my wire snapped, I would like to complete winding of the coil and still have a functioning coil? Will it have any effect on the performance of that coil? It’s being wound around a ferromagnetic core (some alloy). I wound 200 turns and there are 400 more to go. What’s the best way to splice the wire?

Nov 8, 2018 · This assumes you have an oscilloscope or a sensitive-enough AC voltmeter. Grab any old wire and wind one turn around the core. Don't worry if it's a bit messy. Spin the generator at the design speed and measure the voltage at coil (not after the rectifier, if you're using one). That's how many volts per turn you'll generate at that speed.

Dec 20, 2016 · These winding instructions give you a single-layer inductor that minimizes parasitic effects of capacitance. The (B) version suffers from capacitance from one turn to its neighbou

Dec 31, 2015 · The primary winding of a transformer is the input. All other windings are secondaries (outputs), regardless of where they are drawn on the schematic symbol, or where they are physically placed on the transformer core or coil former. You can use what the maker considered as a secondary winding as the primary, if you wish.

Aug 23, 2017 · Put them in series for 2N turns of thin wire, put them in parallel for N turns of wire with twice the area. The same volts/amps on each individual coil adds up to the same total power handling for the same power dissipation within the coil, while the voltage and current at the terminals change by a factor of 2 depending on the connection.

Nov 6, 2018 · As I understand it, the field coils and armature windings in a DC motor are insulated and this insulation can 'burn off' if the motor overheats, causing a short circuit to develop. What is the mate...

Oct 24, 2013 · Typically an automotive coil will saturate magnetically in around 4 milliseconds. After that, it becomes a resistor measuring a fraction of an ohm. At low speed, the points are closed for much longer than 4 msec. Assuming 12V to the coil and .5 ohm for the coil resistance, you get E/R=I or 12/.5=24 amps.