Stator Ring Connection Question

Is the rotating magnetic field being generated by the relative motion of conductors and fluxes, or it is produced by the medial interaction of magneto-reluctance and capacitive directance?

Also, are you using hydrocoptic marzelvanes with your coils?

As I have researched, all I need to create a rotating magnetic field is a stator ring with 6 coils and powered by either 3-phase AC power or DC power like in a brushless motor. My two questions are is there a formula to tell me how many turns per coil of the steel stator ring do I need to make a certain magnetic field, about 1.3T or a program that will simulate the stator ring and tell me how many turns per coil? Also, since a 3-phase power supply is very expensive and the converters start at 200 dollars for 1hp, how would I connect the six coils to use DC to create the rotating magnetic field?

Thanks so much for the help.

Stephen

Or could I use a standard ac plug with one hot leg and one neutral to power my steel stator ring coils, 6 total, to create a rotating magnetic field? If so, how would I connect the coils to the one hot leg and one neutral leg? And how would this affect the number of turns needed for each coil? Which would be better, Using a DC power supply or AC power from a plug with one hot leg and one neutral leg?

Thanks.

Stephen

If you want a 3 phase rotating magnetic field inside your stator you have only two possibilities.

• - Using a 3 phase supply from your energy company or from a local 3 phase generator.
• - Using a frequency converter to change a DC voltage into a 3 phase AC power supply.

If you find a better solution, please tell us and you certainly receive the next Nobel Price for physics.

Regarding the number of turns in your stator. It depends on several conditions.

• - How many magnetic poles are you willing to create with your 6 coils (2 poles less windings, 4 poles more windings)
• - Are you going to connect the two coil per phase in series or in parallel? (serie les windings per coil, parallel more windings per coil
• - Which is the supplying voltage of your coils? (the more voltage the more windings you will need)
• - What are the mechanical dimensions of the stator ring? (a bigger ring needs less windings.)
• - At what frequency you are going to supply your coils? (a bigger supply frequency needs less windings)
• - How many slots you will have in your stator ring.
• - What is the length / diameter from you stator ring.

Second problem, what diameter of wire you are going to use?

• - How much current will flow in your ring?
• - How are you going to limit the heating up of your stator ring as a result of Foucault currents, magnetic losses, magnetorestrictive forces, RI2 losses etc.

As a conclusion I would say there are much more questions to solve than only the number of turns and the 3 phase supply.

Good luck with your experiment.

No need for heating problems, I am only going to run it for a few minutes at a time, the stator coil is a part of a proof of concept device. If my stator is run by DC then my power supply goes up to 20A.

Would I need a rectifier to change the wall AC to DC and create the rotating magnetic field if I already have a DC power supply that goes up to 20A? If so, how much are these rectifiers? Where can I find them?

For a DC supply would I still connect the coils together in a delta or star shape to get the rotating magnetic field?

Would my 20A DC power supply be good enough to run my stator ring? Do I need anything else to connect to the stator ring's interconnected coils to create a rotating magnetic field?

I am using magnet wire and have varying lengths, the red, green, and copper colored magnetic wire. The length of the 6-coils could range,uniformly, from about an inch to about 3 inches if needed.

With this further information can anyone tell me how to figure out how many turns per coil is needed for my steel stator ring with 6 coils to get a rotating magnetic field strength of about 1.3T? Does anyone have any ideas?

Thanks.

Stephen

Rotating Magnetic field: This is done by having a multiphase supply. HERE a 3 phase is minimum and each phase has a pair of poles. Each pair of poles is displaced by 120 degrees on the ring. Therefore, 6 coils are OK for a 3 phase supply.

Just make sure that every pair of poles is wound to create opposite magnetic fields: North & South and placed on a diameter opposite each other. Then the next pair is displaced by 120 degrees. also the 3rd will be displaced by 120 degrees again. (draw a circle and place 3 red dots at 120deg then put a green dot opposite every red dot)--> you will see the configuration required. Now, when the 3 phases supply each phase, the maximum field power generated at each coil will depend on the phase voltage. And since each phase changes in sync with the others and threfore sequencially, the maximum mag field will appear as rotating from each pole to the next.--> that is a rotating magnetic field concept. You will understand that YOU NEED AT LEAST 3 PHASES AC SUPPLY TO GET IT. A DC cannot do that. It must be converted to a 3 phase AC: Use a frequency inverter. If Only a single AC phase Neutral is available, then you can get a Frequency Inverter to transform it to a 3 phase supply with a bonus to be able to varie the frequency...?