Had an idea for materials this past week. Found a source of large starter motors for diesel engines. They starters are 5kw 4 pole big 25 or 30 lbs units being scrapped so I arranged to remove the stator blocks and windings which are held on with bolts.It's already good quality magnet metal all of the leads are big fat strap copper.Stacking them like pancakes and running bolts through the existing threaded holes should save a lot of work.Also snagged three big monster size alternators 200 amp 28 volt beasts with external regulators that convert the out put to 12 24 48 volt.
Im hopeful the starter motor core blocks work out well since they are a replaceable part that comes already wound. It would be really nice if off the shelf parts could be modified a little bit or configured differently to reach the same goal. I dont expect them to handle any more the 1200 watts for any lengthy amount of time since they are made for momentary use to start a engine.

Broke a few tools trying to separate these core blocks from the housing. They are glued with locktite of some form.With flush torx screws that will not allow a penetrating fluid to break down the glue so off to the oven to warm them up and hopefully that will allow the glue to soften enough to get them apart. Placed a neo magnet on the core blocks and it is harder to get the magnet off then on some of the other types of cores I had laying around. In re examining some generators/alternators I noticed the rotors are solid and stators are layered. the reasoning for the layered stators is to reduce eddy currents and wasted heating on the output side so why is it not used on the input side or the inducer magnet of a gen? Motors use layered rotors and layered stators while generators use solid rotors and layered stators. At least that is the case with smaller machines, not sure about magawatt generators since I don't have one of those. Ever since 9/11 you cant even get close to one of the power plants.

Doug,


The generator rotor does not have to be laminated because its magnetic field is constant and does not move within the rotor iron part. The polarity and magnitude of the magnetic field within the rotor does not change. However, it does move (changing alternating magnetic field) in the stator iron core at the speed of the rotor RPM. Notice that for a complete rotation, each coil of the stator sees the north and south poles of the rotor magnetic field. This effect induces Eddy current and generates hysteresis losses in the stator iron core.


Bajac

So would it not stand to reason the inducer magnets would be solid and the induced would possibly be laminated?The rise and fall of current in the inducer creating a changing intensity of the mutual induced output coil. The eddy currents will happen where the induced happens,in the Y coil. Using laminated cores for the magnets may not nessesarily provide the strongest magnetic field on the pole face compared to it's ability to store the field . The only thing being removed is the motion of the rotor.It seems reasonable for it/them to still to have a very strong field projecting toward the Y coil and it's core.
Consider the field is normally thought of as lines which may be just a two demensional view point and they may actually be cylindrical in reality.Then several layers of cyndrical field would cross the laminates twice each. Being of thinner mass each layer in the induced it may be each layer can reach saturation easier.Like working with batteries you can have voltages add together or amperage depending on how connect them.
I know my communication skills suck and picture is worth a thousand words but I think you can draw a bulls eye and then draw straight lines up down or sideways over the bulls eye and then view what Im talking about.

Hi all,

This is my new assembly. I hope to start doing tests soon. As soon as time let me do it. I have used 3 MOT (microwave oven transformers) to get the coils and steel. I have not took out the secondary coils from the MOTs because I am not very handy and I could spoil the primary coils. The secondary coil are wrapped with white paper but they are disconnected, so I hope those coils won´t do any bad there. My assembly is composed of two inducers coils and one intermediate induced coil. All three coils are in line in order to swing back and forth the magnetic fields along the intermediate coil.

One question: What capacity do I need in a condenser to unphase by around 90º a signal of 12 volt and 2 or 3 amperes?  I do not know how to calculate it. Will I get an unphased signal in the intensity or in the voltage?

Regards