Quote:
Originally Posted by kokerich
Thanx for the reply, Peter almighty.  I thought on using the two transistor's for each coil and I'll do that in my next experiment for sure. I just wanted to try all this in very little time I had.
The dots on the coils, I used them to indicate that the poles are oposite on the electromagnets because it works better like that. I also tried to put these in series and it worked also ok and it draw about 45mA but the RPM is lower in that case and the torque as well. And it was also stalled by connecting the battery. 
Whatever the case is, parallel or series configuration, the motor definitly works better when I have one N pole and one S pole towards the iron like on the picture.
The most important thing for me is that the motor works, and I am always seeing the SPIKES on the scope!
Also I need to make some of the FE machines so that I can persuade my father to begin research with me, he is great physics professor but he's been a bit sceptical about all that, but I think he is on his way! 
I'll post the news as my experiments continue in a few days I hope.
Thanx again and forgive me for my bad English. Respect! |
Dear Kokerich,
Your motor should not stall when the charge battery is connected. So, if it works the same way with the coils in parallel or series, then that only leaves two other possibilities. The first is that the diode is bad and is not blocking in the reverse direction properly, OR you have connected the second battery backwards by mistake. Please check these things. Make sure that the negative terminal of the charge battery has a direct connection to the positive terminal of the run battery. If everything checks out, replace the diode anyway, and check it again! The cathode of the diode should face the positive terminal of the charge battery. Your schematic shows the circuit the way it should be. Just make sure that your actual circuit conforms to it.
Connecting the charge battery to this circuit properly
CAN NOT stall the motor.
Peter