STEORN DEMO LIVE & STREAM in Dublin, December 15th, 10 AM

[PaulLowrance]

Hi all I was hoping you could help me. I'm trying to get my circuit working with a UGN3503 sensor. It's based on PL circuit and Ossie with recc on how to power the 6V Hall sensor. The I am measuring a low of 1V across the sensor when activated. I thought it should go to 0. Across the coils I am measuring around 1 - 2 volts With drops of around 0.25  of a volt when using the sensor. Or my reed switch I was getting much higher voltages and drops at the coil. Any help appreciated.

Hi Jimboot,

That's an extremely sensitive hall effect sensor. I'm using a hall effect switch. Anyhow, here's the datasheet,

http://www.ozitronics.com/data/ugn3503.pdf

And here's a circuit that someone made for that the UGN3503,

http://img03.blogcu.com/images/s/p/w/spwm/ugn3503__1255031285.jpg


The UGN3503 seems very nice in that's extremely sensitive, meaning you can place it farther away from the magnets, but definitely requires a different circuit.

[k4zep]

Hi JB,

Please finish your schematic with pin #'s on UGN, show source and drain on FET,  and this afternoon, I'll try and correct it for you if no one else will help....DC resistance of coil?????  Without a square up amp like Paul showed above, it won't switch fast enough.  While an excellent linear sensor, you need a switching action Hall effect that is either high or low for a start.  A mono-polar device that turns on with a N field and turns off with no field if used in a monopole motor.  But anything can be made to work....Do you have a scope????

Ben

[woopy]

Hi all I was hoping you could help me. I'm trying to get my circuit working with a UGN3503 sensor. It's based on PL circuit and Ossie with recc on how to power the 6V Hall sensor. The I am measuring a low of 1V across the sensor when activated. I thought it should go to 0. Across the coils I am measuring around 1 - 2 volts With drops of around 0.25  of a volt when using the sensor. Or my reed switch I was getting much higher voltages and drops at the coil. Any help appreciated.

Hi jb

here under the hall switching i use . It is a modified config of PL schema. It works very well on both my ossie-monocoil  and my orbo testing . It works with a BUZ 11A also.  The Hall sensor is a TLE 4905 L, perhaps easyer to use . The led is not necessary but it shows the impuls. The Diode IN 4007 is not necessary but prevent the kickback impuls and the motor spins smoother why Any idea ??

On the picture you see the scope shot without the diode installed. The kickback is at about 100 volts. If i put a 1 microfarad 2000volts cap between the drain and the diode i can light a neon bulb almost continuesly.

Is there any body trying to replicate the  Ossie- Monocoil motor or the one -wirecoil  -motor. ??

Good luck

Laurent

[gravityblock]

At TDC, send a pulse with a fast rise time in current (this is according to Steorn).  When the current is steady and no longer increasing, start to decay the pulse with a decreasing current until the magnets are no longer attracted to the core.  When the magnets are at the edge of no longer being attractive to the core, the current from the pulse should be 0.  This determines the decay time in our pulse and also determines our pulse width.  The current in the pulse should be decreasing towards 0 until it reaches the end of the pulse width. 

At the end of the pulse, there should be an energy gain in inductance that possibly could be captured as BEMF if the timing is right.  We won't be able to capture the BEMF from the pulse because it will be lost during the decay time.

What we're trying to do is to perturb the curled B inside the core with a decreasing decay time in the pulse, while the departing magnets are perturbing the uncurled A potential outside the core to pull energy into the core while our input pulse is decaying in time.

This keeps the core at 0% attractive force while using less input energy because the perturbed uncurled A potential is providing additional energy.  This would lead to a mechanical gain that is much more than the electrical losses.

Just another wild idea.  Thanks to all for not bashing me because I get a little frustrated from time to time.


GB

[Omnibus]

@woopy,

Is it possible to dump the current and voltage data seen on the screen of your DSO (corresponding, say, to one full turn of the rotor) into an Excel spreadsheet and upload it here? Can you also tell us what the Ohmic resistance is of the coils where you've measured the said current and voltage?