Quote:
Originally Posted by twoody
HI
I would just like to thank Peter for sharing this idea that has got us all thinking about doing something. I am like many out there that are following this forum and working on a motor but have not shared my progress.
I am using a 1/3 hp AC induction phase 1 motor that is readily available at yard sales. I happen to have one from a broken drill press.
It had a stator core with 24 poles. I removed every other one to 12 (hacksaw). Very low tech. this was to make the winding easier and allow time between pulses. The idea is to pules 6 at a time. and to use Steven's suggestion to change polarity on each pulse. The core is an aluminum and steal mix. it had a smooth surface so I marked it for 6 points that are slightly larger then the stator and removed the rest with a grinder.  Sorry I have no fancy machining equipment. If it doesn't work I will have to have one made. The affect of this type of core will be interesting to say the lest. 
I am in the process of winding the stator with 22 gage wire and 20, 2 wire winds. Peter's Idea of doing this in 12 separate windings came just in time. I will try running with 12 volts first, then increase to 24.
I plan on following Jetijs excellent work with the circuit design. using the photo switch and a CD with slots attached to the end of the pulley.
I am having a great time learning about electric motors and circuit designed.
Thanks again for all your inspiration.  |
Twoody,
Welcome to the group. Excellent work so far. The model you are building will teach you the truth about many things. Each design, and every design feature, functions as a specific "question" you are asking of Nature. The behavior of the design is Nature's "answer" to your question. And Nature NEVER LIES!
In this process, there are no "mistakes", there is only "learning". As the process moves forward, if the machine behaves in ways that are different than what you intended, it means that Nature is telling you something important about the design. It's like, if you get the wrong answer(result), its only because you asked the wrong question (design).
With this in mind, I am going to suggest that the original rotor for the induction motor may not be suitable as a starting point for a rotor for this new kind of motor. In the original configuration, the presence of aluminum mixed with the iron causes cross-inductions which are used by the rotating magnetic field to cause DRAG in the rotor, forcing it to follow along. The iron conducts the magnetic field coming from the stator. As the conducted magnetic field interacts with the aluminum, it induces a current that is at right angles to the magnetic field in the iron. This induced current in the aluminum produces a second magnetic field that now drags against the primary field. The complex interaction of these TWO magnetic fields cause the rotor to turn and deliver torque.
In this new style of motor, however, this is not the principle we want operating in the rotor. All we are looking for is a piece of iron to be attracted to the magnetic field of the stator, with no interferences.
But keep working on winding the coils and putting the circuit together. Then try the rotor you have made, but don't be too surprised if it turns slowly or weakly.
One last thought. People like to believe they are building a "free energy machine". This is NOT TRUE. What you are doing is building a "science experiment". If you learn, step by step, and don't quit, you will EVENTUALLY build a model of an electric motor with a COP>1.
Keep up the great work.
Peter