Electric Motor Secrets

[Jetijs]

Mark, the circuit I posted above was used in motor V2.0 and it had IRFP450 MOSFET's, now I will use IRFP360 MOSFET's, because thay can handle higher currents.

[uusedman]

This question will certainly be out of place however, i am curios to know why you using 2 motors? Is it part of the project to recycle the energy from one and give to the other and vice versa?

PS your work is awesome and motivational.

[Jetijs]

Hello uusedman
I have already explained the reason of two motors working as one in my previous posts. The big idea is that V2.0 showed efficiency go up as the motor was loaded, but loading the motor also did slow it way down and this is mostly because the motor is not ON 100% on the time, it is only ON about 240-260 degree per revolution, all the remaining time it just rotates forward by its own inertia. And it is in this inertial movement, when the motor can be slowed down considerably. So I though that if the motor is ON all 360 degree of a rotation, I should be able to load it and not loose much in speed. Since this type of motor needs a "time to breathe" between pulses for recovery, it can not be made to operate at 100% ON time. That is why I need two motors with out of phase rotors. This way when one motor is doing work, other is resting and vice versa. That way we can get 100% ON times or even more, because the stator/rotor geometry allows ON time overlaping.
Hope this helps

[uusedman]

Jetis,

Thank you for your humble and informative answer. 2 motors can feed each other, when one is working and recycling the induced charged it can be applied to the 2nd motor when it is ready to fire.

[Aaron]

Free Energy

Peter put up some new resources on his website...just got vamped quite a bit.
Free Energy

Anyway, just an update.

[mlurye]

Jetijs,
Are you planning to utilize BEMF in your system? For now (based on your schema) it will affect performence of your motor.
Just as an idea. I'm not sure if this schema will work.

[Jetijs]

Sorry Mike,
I missed your post. Yes, the inductive spikes will be collected and sent into the primary capacitor so that much less energy will be needed from the power supply. In my previous schematics you see just the driving circuit with no recovery part. This is the exact reason why I am using bifilar coils, because one coil will be used as primary power coil and other coil will be the recovery coil. You have to use bifilar coils in order to get the output right beck to the input. You can also use just single strand coils, but then you will have to send all the inductive spikes in a second battery or somewhere else. Here is the circuit with the recovery part (this is for the V2.0 motor):

[Jetijs]

Started testing the circuit. Found two problems. One set of two MOSFETS has the UCC37322 MOSFET driver and not UCC37321. This is an inverted output driver, so two sets of MOSFETs are working in inverted mode I don't know how I could make such a mistake. Also one of the rest six MOSFETs has and transil diode across the drain and source that is rated at 100V and not 400V as the rest. This makes the MOSFET oscillate in low frequency rather than turn it steady ON when the optoswitch triggers. I can easily chanfe the transil diode, but resoldering the inverted MOSFET driver will be hard if possible with the equipment I have. I guess that I will rather just disconnect the inverted driver from the rest of the circuit and solder another non-inverted driver somewhere else on the circuit board.


Edit:
No, the transil diode on that one MOSFET was not the cause of the oscillations. I guess that the MOSFET is just dead.
Edit: Yes, te MOSFET was dead.

[StevanC]

Jetijs,
I can only advice allways use socket for 4+pin packs.
I intend to make my next 555 swither on a socket only (with two optos inluded) - socket rules in case like Yours.

Don't have vacuum solder sucker?

[Jetijs]

Thanks StevanC
That is a great idea! I wonder if there is something like that also for the MOSFETs? That would make changing fried MOSFET's very easy
Anyway, I already disconnected the inverted driver chip from the rest of the circuit and soldered in a new driver on the free space of the board.
Thanks,
Jetijs

[StevanC]

Thanks StevanC
That is a great idea! I wonder if there is something like that also for the MOSFETs? That would make changing fried MOSFET's very easy
Anyway, I already disconnected the inverted driver chip from the rest of the circuit and soldered in a new driver on the free space of the board.
Thanks,
Jetijs

Actually it is (!)

it's called 'clamp' and has two holes and a screw for each:

|oooooo|
|oooooo|

^-- looks like this...
;-) cut a three rows or sixer out and just use.... (did You see my Youtubed SSG?)


I can fit an MJL to it and have my SSG run, then i just swap various BJTs and see how they compare:
I ran my from the MPSA06 and he is the winner among the small (to93 sized) ones in front of the venerable but fast 2N2222...
the draw was 320mA to 270mA

[Jetijs]

Do you perhaps have a picture? I could not find anything on google

[StevanC]

Do you perhaps have a picture? I could not find anything on google

phew!

RadioShack.com - Cables, Parts & Connectors: Connectors & connectivity: Terminal strips & barrier blocks

:-)
helps?

[Jetijs]

Oh, you mean those. I use them where I can, but this time I need something I can solder in a bread board. Just like those chip sockets. Also it is very hard to use those clamps if you have many transistors/MOSFETs close to each other, because you just can't reach the screws with the screwdriver.

[hh1341]

Oh, you mean those. I use them where I can, but this time I need something I can solder in a bread board. Just like those chip sockets. Also it is very hard to use those clamps if you have many transistors/MOSFETs close to each other, because you just can't reach the screws with the screwdriver.

Jetijs,

How about sticking a small breadboard onto your circuit board?

You can also hack up those sockets with a sharp knife, to hold any number of leads(3 in your case)The sockets I am referring to are the DIN chip sockets.
Carl