Fod3180
To Anoop,
I have had good switching time and full on and off control using the FOD3180 driver chip.
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Hi again UFO,
I've tried what you have suggested: Varying both the gate to source resistance (100K pot) and also the trigger to gate resistance (500 ohm pot, 100 ohm pot). Does not seem to make an improvement.
I am driving a single FET with the coil disconnected and a simple load resistor in place of the coil, for this test. Am not using the heatsink as a bus bar for the Drain connection, but using the drain leg for this test.
Maybe my FET's are not upto specs (?) will try obtaining from different sources and test again.
Meanwhile can anybody suggest any common easily obtainable driver IC's to try? UFO, what do you feel the minimum switching times should be?
In the past I've tried using mechanical relays instead of transistors for faster switching - however the high currents would cause the contacts to stick(!)
Thanks and regards,
Anoop
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Originally posted by Ufopolitics View PostHello Dear and thank you,
Now, do you have an "all time" connected resistor to do that?...In my circuit I have One 47 K from Gate to Source...on each N-Channel FET...
In your case since it is a different circuit... I would connect there a 100K Potentiometer...and regulate it, till getting "even times" of On-Off...then replace by a fix value resistor...
The lower the value of that resistor the higher the switching OFF times...
But you also have a small issue in the Turning On time...needs to go faster...that also gets affected by the resistor that runs from the IC Trigger-Gate...
Hope this help you
Regards
Ufopolitics
Hi Ufo,
Thanks for your quick reply. Will try what you suggest and get back
rgds
Anoop
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Resistor?
Originally posted by Anoop View PostHi Ufo and Everyone!
It's taken me around a month to finish reading and catch up to date with this thread, but then I've been building along the way. UFO thanks very much for sharing, and it's great to see so many people on the thread. After a couple of years of experimenting, I've finally had some success on this thread, Thanks again UFO.
@JohnStone
John, thanks for all the great circuits, and the explanations on driving FETs. I wonder if you could assist just a little more.
I am using two of your driver circuits - the two transistor E1 circuit and the 555 based E3 circuit. I have a function generator for providing my square wave input signal via an optocoupler. I am amplifying and cleaning the signal from the optocoupler before sending it into the driver circuit. Using a scope, I am observing that the switch-on time I am getting on my Mosfet seems good - around 200 Nanoseconds. However the switch-off speed is terrible - around 50 Microseconds. (the spec sheet states the mosfet rise and fall times as aprox 100Ns each way, inclusive of delay time).
I wonder if you could advise on the factors that affect the switch off speed and what I could try to improve this. (just as you explained how the capacitors were important for switch-on speed).
I've looked at the output signal from the driver and the waveform seems good, showing a very sharp on and off. I've also experimented with shorting the FET gate to ground (source), just to see how fast the fet switches off, and even then it still takes around 50 Microseconds. Have tried a couple of different FET's, but same result - (Fast switch on, slow switch off). Searching the net, but nothing yet! Hope you can help, thanks!
Best wishes
Anoop
Hello Dear and thank you,
Now, do you have an "all time" connected resistor to do that?...In my circuit I have One 47 K from Gate to Source...on each N-Channel FET...
In your case since it is a different circuit... I would connect there a 100K Potentiometer...and regulate it, till getting "even times" of On-Off...then replace by a fix value resistor...
The lower the value of that resistor the higher the switching OFF times...
But you also have a small issue in the Turning On time...needs to go faster...that also gets affected by the resistor that runs from the IC Trigger-Gate...
Hope this help you
Regards
UfopoliticsLast edited by Ufopolitics; 08-25-2012, 02:23 PM.
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Mosfet switching
Hi Ufo and Everyone!
It's taken me around a month to finish reading and catch up to date with this thread, but then I've been building along the way. UFO thanks very much for sharing, and it's great to see so many people on the thread. After a couple of years of experimenting, I've finally had some success on this thread, Thanks again UFO.
@JohnStone
John, thanks for all the great circuits, and the explanations on driving FETs. I wonder if you could assist just a little more.
I am using two of your driver circuits - the two transistor E1 circuit and the 555 based E3 circuit. I have a function generator for providing my square wave input signal via an optocoupler. I am amplifying and cleaning the signal from the optocoupler before sending it into the driver circuit. Using a scope, I am observing that the switch-on time I am getting on my Mosfet seems good - around 200 Nanoseconds. However the switch-off speed is terrible - around 50 Microseconds. (the spec sheet states the mosfet rise and fall times as aprox 100Ns each way, inclusive of delay time).
I wonder if you could advise on the factors that affect the switch off speed and what I could try to improve this. (just as you explained how the capacitors were important for switch-on speed).
I've looked at the output signal from the driver and the waveform seems good, showing a very sharp on and off. I've also experimented with shorting the FET gate to ground (source), just to see how fast the fet switches off, and even then it still takes around 50 Microseconds. Have tried a couple of different FET's, but same result - (Fast switch on, slow switch off). Searching the net, but nothing yet! Hope you can help, thanks!
Best wishes
Anoop
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Wrong Post, at wrong Thread?
Hello dear,Originally posted by ambroseangle View PostSome of the problems will arise with the motors like these. I too faced the problem like this last year with my motor and after the testing of the service organizer, I came to know that the problem is in the connection. I would like to suggest you to verify the connections and if you have warranty you may take it back to the company so that free servicing can be obtained.
Who are you addressing? ...
What connections?, what motors...no motors here...I came to know that the problem is in the connection. I would like to suggest you to verify the connections
?
So, take it back to who?...LOL...to UFO?if you have warranty you may take it back to the company so that free servicing can be obtained.
Sorry but I believe you confused threads...is ok, but please delete message and I will delete mine...
Thanks
Ufopolitics
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Some of the problems will arise with the motors like these. I too faced the problem like this last year with my motor and after the testing of the service organizer, I came to know that the problem is in the connection. I would like to suggest you to verify the connections and if you have warranty you may take it back to the company so that free servicing can be obtained.
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thanks iankoglinOriginally posted by iankoglin View PostG'Day Seth
I am having problems with my computer at the moment but the Circuit is on page4 Post116
It is here
Kogs UFO Photos :: UFO's Circuit picture by Kogs1 - Photobucket
The Oscillator circuit part is here
Sho UFO :: 555 Oscillator Circuit picture by Kogs1 - Photobucket
Also how it all fits together the happy motor is here
Kogs Happy Motor picture by Kogs1 - Photobucket
It is important to read all the posts to understand what is going on and also there are a few mods
I hope this helps

i have a vreg and oscillator on a circuit board and i just need to put together the mosfet section and wind a coil.
its really the final configuration of the resistors you have used between the mosfet and oscilator sections that i'm trying to get.
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G'Day SethOriginally posted by s e t h View Post@ iankoglin
would you mind updating your circuit diagram to latest final operational configuration and posting it please?
edit: the overview one with annotations is what i'm after ideally but if you have the oscillator and pwm handy as well i'd be very greatful
thanks /edit
I am having problems with my computer at the moment but the Circuit is on page4 Post116
It is here
Kogs UFO Photos :: UFO's Circuit picture by Kogs1 - Photobucket
The Oscillator circuit part is here
Sho UFO :: 555 Oscillator Circuit picture by Kogs1 - Photobucket
Also how it all fits together the happy motor is here
Kogs Happy Motor picture by Kogs1 - Photobucket
It is important to read all the posts to understand what is going on and also there are a few mods
I hope this helps
Leave a comment:
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kogs happy circuit
@ iankoglin
would you mind updating your circuit diagram to latest final operational configuration and posting it please?
edit: the overview one with annotations is what i'm after ideally but if you have the oscillator and pwm handy as well i'd be very greatful
thanks /editLast edited by s e t h; 08-23-2012, 08:17 PM.
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kogs happy circuit
Dear kog,
could you be so kind and post the picture of your happy motor circuit,
which is shown on your video,
I searched the thread but could not find it.
I saw an interesting pattern on your oscilloscope and i would really like to replicate your exact setup.
Thank you all for your contributions.
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archive
Hi All,
Found the UFO threads late. I wish to read up but I can stay online while reading, cost.
Please has anyone archived this thread in pdf complete with text and images.
Please share
Regards
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Thanks Soundiceuk!
Originally posted by soundiceuk View PostHi Ufopolitics, I have followed your excellent work for a while now
It's kind of cool how many of the threads seem to be crossing over lately.
I may be off the mark here but here is a research link Bruce sent out tonight and I just couldn't help but wonder what your opinion is of the patent. I'm not sure how relevant it is to your work, but if you or anyone else hasn't seen it before, you may find it interesting.
Priest Has Motor Run By 'Ion Energy'
Antonio d'Angelo -- Inter-Atomic Ion Motor -- NY Times article & US Patent # 2021177
The attractive feature of the cosmic rays is their constancy. They shower down on us throughout the whole 24 hours, and if a power plant is developed to use their power it will not require devices for storing energy as would be necessary with devices using wind, tide or sunlight. All of my investigations seem to point to the conclusion that they are small particles, each carrying so small a charge that we are justified in calling them neutrons. They move with great velocity, exceeding that of light. More than 25 years ago I began my efforts to harness the cosmic rays and I can now state that I have succeeded in operating a motive device by means of them. I will tell you in the most general way, the cosmic ray ionizes the air, setting free many charged ions and electrons. These charges are captured in a condenser [capacitor] which is made to discharge through the circuit of the motor. I have hopes of building my motor on a large scale, but circumstances have not been favorable to carrying out my plan.
Hello Soundiceuk!
And thanks!
That Patent sure looks very interesting...D'Angelo shows very clear wiring and windings there, nice graphics for the "Age" of that Patent!...excellent Artist!...Italian of course...LOL
Machines have dual commutator assemblies at different configurations (similar to mines)...However, if you "follow" the wires they leave upper commutator and then "return"to Upper Commutators next element (Lap Symmetrical Wind)...as so it happens the same way at lower commutators...it is a very similar design to the very Old Dynamo-Motor Machines...
Unfortunately...they are still ruled by the Symmetry...
But can not deny the great Magnetic Patterns that would be created by those very different concepts in windings and overlapping between upper-lower crossed coils.
Thanks for sharing it here!
Regards
UfopoliticsLast edited by Ufopolitics; 08-23-2012, 12:18 AM.
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Priest Has Motor Run By 'Ion Energy'
Hi Ufopolitics, I have followed your excellent work for a while now
It's kind of cool how many of the threads seem to be crossing over lately.
I may be off the mark here but here is a research link Bruce sent out tonight and I just couldn't help but wonder what your opinion is of the patent. I'm not sure how relevant it is to your work, but if you or anyone else hasn't seen it before, you may find it interesting.
Priest Has Motor Run By 'Ion Energy'
Antonio d'Angelo -- Inter-Atomic Ion Motor -- NY Times article & US Patent # 2021177
The attractive feature of the cosmic rays is their constancy. They shower down on us throughout the whole 24 hours, and if a power plant is developed to use their power it will not require devices for storing energy as would be necessary with devices using wind, tide or sunlight. All of my investigations seem to point to the conclusion that they are small particles, each carrying so small a charge that we are justified in calling them neutrons. They move with great velocity, exceeding that of light. More than 25 years ago I began my efforts to harness the cosmic rays and I can now state that I have succeeded in operating a motive device by means of them. I will tell you in the most general way, the cosmic ray ionizes the air, setting free many charged ions and electrons. These charges are captured in a condenser [capacitor] which is made to discharge through the circuit of the motor. I have hopes of building my motor on a large scale, but circumstances have not been favorable to carrying out my plan.
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