Opposed Piston Motor

tropes · February 05, 2010, 11:57:03 AM

Quote from: solinear on February 05, 2010, 11:43:16 AM
In the meantime, using your '10 cylinder' design, you can just lower the voltage on the coils to the point where they aren't pushing. The end result is that all the real work is being done by the attraction phase of the other pairs. I'm not sure what the difference would be and it might not even be a positive impact.

Because the two opposing pistons (magnets) are at their closest proximity to each other at one point while the others are attracted, it is necessary to fire that one coil. Otherwise all the magnets are in a state of balance and there is no motion. I will give this further thought. Thanks for the input.
Tropes

solinear · February 05, 2010, 12:43:53 PM

Quote from: tropes on February 05, 2010, 11:57:03 AM
Because the two opposing pistons (magnets) are at their closest proximity to each other at one point while the others are attracted, it is necessary to fire that one coil. Otherwise all the magnets are in a state of balance and there is no motion. I will give this further thought. Thanks for the input.
Tropes

What I'm saying is to have them fire on the same timer, just lower the voltage while they are charged, so that you're expending less energy.

solinear · February 08, 2010, 12:41:18 PM

Quote from: solinear on February 05, 2010, 12:43:53 PM
What I'm saying is to have them fire on the same timer, just lower the voltage while they are charged, so that you're expending less energy.

To clarify what I'm saying, don't change the 'repel' phase timer in any way, just adjust the voltage to a lower amount (1.5v from 3.5v or whatever you're currently using) and that will reduce the wattage consumed significantly, then attach a generator to the crankshaft, if you don't currently have one. I understand that your back-EMF makes the motor a generator, but it doesn't utilize as much of the torque as it could or as efficiently as it could.

tropes · February 08, 2010, 02:43:59 PM

Quote from: solinear on February 08, 2010, 12:41:18 PM
To clarify what I'm saying, don't change the 'repel' phase timer in any way, just adjust the voltage to a lower amount (1.5v from 3.5v or whatever you're currently using) and that will reduce the wattage consumed significantly, then attach a generator to the crankshaft, if you don't currently have one. I understand that your back-EMF makes the motor a generator, but it doesn't utilize as much of the torque as it could or as efficiently as it could.

I will experiment with different source voltage. The main source of generated power is not BEMF but current induced in the coil when the two magnets are drawn towards it.
Tropes

solinear · February 08, 2010, 02:59:01 PM

Quote from: tropes on February 08, 2010, 02:43:59 PM
I will experiment with different source voltage. The main source of generated power is not BEMF but current induced in the coil when the two magnets are drawn towards it.
Tropes

There is going to be a maximum amount of energy you can get from a single coil. If you attached a small generator (hand crank dynamo, maybe), you would get more energy out than you'll get from that single coil. Not to mention that you're inducing kinetic energy from the repel phase of your cycle, which ends up being basically 80% loss (small amount of energy goes into the flywheel, but not much). If you had a small generator attached, I think it would probably be closer to 20-40% loss, which is a pretty big difference.