Sharing ideas on how to make a more efficent motor using Flyback (MODERATED)

[verpies]

I have some MC14013b, LM3915, IR2103  on hand, any good?

If I turn on my McGyver mode, then I can put sth together with these parts.

[gotoluc]

The build is fine, except for the rotor design.

Agree, I knew that was the week part and why I could predict it could brake apart at any moment. It was a quick build so not to invest too much time and material. If successful I would take the time to embed the cores in a rotor just as you described below.

The electric current profile and its covariance with the supply voltage is nothing unusual and it is accordance with this analysis but it  has potential to be interesting because the operating principle is different than a common DC motor.

Also agree with you here. However, I thought it would of had more potential. Maybe because I changed the I cores entry by rotating the E core by 180 degrees to favor torque. could that of changed the results?

My changes to the mechanical design:
- I would embed the I-cores in a solid wheel by routing out sockets for them (stronger and less windage),

Yes, agree and exactly what I would of done for v.3

My changes to the electronic design:
- Fully electronic adjustment of the driving pulse position instead of the mechanic adjustment
- Fully electronic adjustment of the driving pulse width
- Deleting that inductive load resistor across the capacitor and substituting it with a reed relay in series with an automotive light bulb for emptying the capacitor (could be a different resistor but the bulb is more fun)
- Judging how much energy is recovered from the motor winding by measuring the peak voltage to which the capacitor gets charged, as this is very precise and dependable method if the capacitor is good, meaning: it does not leak or soak.
- not sharing the same power supply between the motor winding and the electronics...or at least a separate voltage regulator.
- Using a real MOSFET gate driver.
...and much more refinements later (such as closing flux paths).

I would like to try all the above but I'll need help on the circuit side which is not part of my skills.

If I turn on my McGyver mode, then I can put sth together with these parts.

Okay McGyver, do what you can  and I'll try the circuit out. I've got lots of IRF3710 as low R switches.

Thanks for your help

Luc

[verpies]

Do you have any small transistors?

The LM3915 has constant current outputs which makes it hard to make a sequencer out of it while using a timing capacitor being charged at different rates.

[gotoluc]

Do you have any small transistors?

The LM3915 has constant current outputs which makes it hard to make a sequencer out of it while using a timing capacitor being charged at different rates.

Yes, I have 4 of MPS8599, 4 of MPSA06, 4 of MPS222A,  4 of 2N4401 and 3 of 2N3904

I also found 1 of NTE4049 1 of CD4043BCN and 1 of SN74ACT08N

I have some opto 4 of 4N35 and 2 of CNY17-3

and found lots of mosfet drivers MIC4451

Hope it helps?

Luc

[gotoluc]

The below comment was posted youtube on my Bucking Field Reluctance Motor vs off the shelf DC Motor test.
I think he has a point. I was looking mostly at the current but it is true that The bucking field motor has a perfectly stable and flat voltage.

What do you guys think?

Luc


YouRogga   Hmm, but the voltage drops down about 20% during the pulse as the current increases with the standard DC motor. Your motor shows a constant voltage during the pulse, despite the increase of current. Isn't that significant? I don't understand why the voltage is constant in your motor, I think it should drop when the current increases but it doesn't. Why?