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Author Topic: Schematics - Diagrams  (Read 48783 times)

Offline keykhin

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Re: Schematics - Diagrams
« Reply #30 on: July 09, 2011, 09:19:26 PM »
@ Romero, Darkwanderer has right when he says the gate of the upper transistor is not well controlled and can lead to losses by heat. And keep in mind, the gate needs a voltage between 12 and 18 volts to turn on the mosfet and has four stages. But it's more important to know how to turn it off which is a back tracking of turn on stages. There are a lot of dedicated integrated circuits for this job, but I rather use discrete components. Once you understand that, you can make "wonders". Here is a link to a lot of tricks "Design And Application Guide For High Speed MOSFET Gate Drive Circuits": http://focus.ti.com/lit/ml/slup169/slup169.pdf

Offline Romero

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Re: Schematics - Diagrams
« Reply #31 on: July 09, 2011, 11:25:18 PM »
@ Romero, Darkwanderer has right when he says the gate of the upper transistor is not well controlled and can lead to losses by heat. And keep in mind, the gate needs a voltage between 12 and 18 volts to turn on the mosfet and has four stages. But it's more important to know how to turn it off which is a back tracking of turn on stages. There are a lot of dedicated integrated circuits for this job, but I rather use discrete components. Once you understand that, you can make "wonders". Here is a link to a lot of tricks "Design And Application Guide For High Speed MOSFET Gate Drive Circuits": http://focus.ti.com/lit/ml/slup169/slup169.pdf
I agree, after looking a bit more to the schematic I realized he is right. So far I was lucky and no heat and I have 4 identical circuits built like that but I am using 4422 as driver.
Your schematic is very good but I have never test it and that's why I presented the one I have been using in some projects and tested by me.
I'll try to modify one of the circuits to see if any diference.
At the moment my priority is not the electronics, I am working to put together all parts for another style generator.

Romero


Offline Romero

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Re: Schematics - Diagrams
« Reply #32 on: July 15, 2011, 09:07:24 PM »
Adams motor/generator
Important info.


Offline keykhin

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Re: Schematics - Diagrams
« Reply #33 on: July 16, 2011, 06:04:36 PM »
HOW TO BUILD SOLID-STATE ELECTRICAL OVER-UNITY DEVICES

Offline David

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Re: Schematics - Diagrams
« Reply #34 on: July 19, 2011, 02:01:55 PM »
Romero, what do you think about this picture below?
David

Offline DeepCut

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Re: Schematics - Diagrams
« Reply #35 on: September 26, 2011, 06:55:33 PM »
Adams motor/generator
Important info.


Hey that's my Zip file :)

I'm glad you spotted it a lot of people missed it when i posted it !
Experience is a hard teacher, it gives the test first and the lesson afterward.

Offline Romero

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Re: Schematics - Diagrams
« Reply #36 on: December 10, 2011, 12:55:13 PM »
This simple circuit is really working good. To drive a flyback replace the capacitors with smaller ones to increase frequency.

Offline sinergicus

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Re: Schematics - Diagrams
« Reply #37 on: January 05, 2012, 03:14:17 PM »
Very efficient and simple motor coil driver with recovery. Leave SW1 open until the system has maximum speed.

Regarding this schematic  I have  some unclarities: the PNP 2N2955 transistor , from my understanding powering  the coil .From datasheet   I see , is a power transistor
100V and 15 Amps.   The replacement option mentioned by you  in schematic is BC 559  30 V  at 100 ma...this is not  a mistake ? that little transistor  with low amps and volts parameters  will support to powering a motor  coil  ?
« Last Edit: January 05, 2012, 03:16:12 PM by sinergicus »

Offline Romero

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Re: Schematics - Diagrams
« Reply #38 on: January 05, 2012, 05:49:45 PM »
Very efficient and simple motor coil driver with recovery. Leave SW1 open until the system has maximum speed.

Regarding this schematic  I have  some unclarities: the PNP 2N2955 transistor , from my understanding powering  the coil .From datasheet   I see , is a power transistor
100V and 15 Amps.   The replacement option mentioned by you  in schematic is BC 559  30 V  at 100 ma...this is not  a mistake ? that little transistor  with low amps and volts parameters  will support to powering a motor  coil  ?
there is no mistake, I used bc559 with 3 volt input for a small coil/rotor and worked just fine.
Romero

Offline gnino

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voltage regulator oscillator
« Reply #39 on: January 20, 2012, 04:45:04 PM »
[/youtube]

jonnydavro post this video schematic are inside

i think could be usefull in varius project

p.s. off topic

thanks for your work Romero i replicate first trumpet waveform video at first try

Offline Romero

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Re: voltage regulator oscillator
« Reply #40 on: January 20, 2012, 05:24:56 PM »

jonnydavro post this video schematic are inside

i think could be usefull in varius project

p.s. off topic

thanks for your work Romero i replicate first trumpet waveform video at first try
thank you, it is really nice circuit. I wonder if it works with other types of voltage regulators.

Romero


 

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