Permanent magnet assisted motor coil designs

[captainpecan]

I have been thinking that the severe Lenz drag I got in my other experiment with magnets on the rotor while collecting the flyback, wasn't so much from the flyback. It was from the circuit effectively being a halfwave rectifier with that diode in there. This means it is collecting the energy in generator style as the magnet approaches the coil, then nothing as it passes TDC, gets the pulse, then collects again as the spike occurs of the flyback. This is fine for a device such as the SSG where speed of rotor is not important at all. But I do not want to capture the energy on the incoming movement. I am thinking of using a reed switch to have an open circuit during the approach to stop this drag. It seems to me as long as the reed switch is closed when the high voltage spike occurs, it should not cause any further wear on the switch from the high voltage like if it were to try and jump the gap. How have others done this and have they been doing something completely different? I am not wanting to slow down the motor function other than what is required to recover that flyback. I plan to pull energy from the system with a special designed generator function as the speed is high. Any ideas would be appreciated.

[captainpecan]

More mental thpughts on my project and understanding my short comings. I finally wrapped my mind around why my coils seemed to have a more severe effect of Lenz law than a usual motor when i was using magnets on the rotor. I expected drag when trying to collect energy from it but it really seemed more than usual. Well it now makes perfect sense. I was trying to just collect the flyback with a single diode. This does work, but as I stated earlier, it was also collecting the energy as the magnet approached the coil like a half wave rectifier. I was using opposing magnets which for motor function is great because the magnet in the core is effectively off until pulsed then adds to the push away. But it is horrible for the generator function. Lenz law is of course generating a field opposing the approaching magnet, it just happens to be the correct polarity to also begin releasing the core magnets flux as well that opposes it. So i basically have doubled the amount of drag from lenz law. So these coils really are terrible generator coils. This is not a problem and still can easily take full advantage of the motor function being greatly increased. I just finally understand why it really bogged down the motor when i took energy out. Lesson learned. And now I have a plan to exploit this knowledge and benefit from it.

[seychelles]

THE QUICK AND EASY WAY TO AVOID ALL THE LENZ NEGATIVE EFFECT.
IS TO MAKE THE STATOR AND THE ROTOR THE SAME. AS THE TWO REACH TOP
DEAD CENTER BOTH ARE TRIGGERED. AND VOILA.

[citfta]

Captainpecan,  here is the circuit I used to drive my motor and capture the inductive kickback.  I never saw any reduction in speed when collecting the kickback with this circuit.


You can drive it with almost any type of trigger circuit.  The 555 circuit acts to clean up the input signal.

[captainpecan]

Captainpecan,  here is the circuit I used to drive my motor and capture the inductive kickback.  I never saw any reduction in speed when collecting the kickback with this circuit.


You can drive it with almost any type of trigger circuit.  The 555 circuit acts to clean up the input signal.

Thanks, that's a pretty simple circuit!