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Excuse me, but i don't get it.
The length of the wire in my first setup (and in the last setup) is such that the battery looks like a point from the view of the plate.
Does it (what you say) mean that the distribution of charges in the plate is the same before and after you touch the battery minus terminal with wire (which is connected to the plate)?
To FvM: Why? Do you mean no field from plate? That means if we have a test charge close to the plate this charge feels no force. right?
Then, I think it contradicts this thought experiment (for simplicity in vacuum):
Imagine you have two plates connected by wire with plus and minus terminal...
Thanks for beginning.
Ok. The battery is not shielded and placed out of the vicinity of the plate.
Let's assume that there is a wire (thin) long enough (e.g >10 meters) that connects battery and a plate. Plate is small compared to the wire length (e.g 100x100 mm).
I have 3D solver and I know...
Imagine we have two items.
1)A "U" volts battery with two terminals "+" and "-" (e.g. 12V car battery).
2)Thin copper plate of size AxB. It is neutrally charged - number of electrons equal to protons.
I touch a "minus" terminal of a battery with this plate (plus terminal left floating).
The...
I have decided to start with CCM mode flyback. Infineon (ICE3BR0665J) has few APPnotes for CCM design.
Transformer interleaved winding means a lot in reducing Leakage inductance - that what I know for sure.
Power Integrations made a lot in popularizing Flybacks. But their ICs (TOP series) are...
Thank you guys for your answers.
I forgot to say that I am not very experienced in flybacks. Had few projects, mostly with good referance designs from IC producers.
The supply voltage is 85 V. That is for railroad. 4A charger for mobiiile devices.
Should be I afraid of CCM mode with...
Here are two calcs for both dc_min and cd_max:
For L=400uH and n14
For L=130uH and n6
In first case I am out of DCM. In second case the duty cycle at 160V seems too low (maybe or maybe not).
What do you think, where should I stay?
>>Did you also make a design for 160V supply?
No I didn't. Was straight inside 60V problem.
It is not obvious what you are saying to me, because I can not do calculations right now. I will do calculations for my fixed Lpri=219uH and Vmax=160v tomorrow.
>>Most likely you'll use some middle...
Need help.
Need to design a dc/dc isolated voltage regulator.
Vin 60-160 v
Vout 5V
Io=0A - 5A
Efficiency more than 83 %.
The design should fit in 110x58x26 mm volume (aluminum box)
I started (draft design on paper) with flyback DCM topology.
1) ICE3BR0665J controller, 65 kHz, 0.65Ohm RDSon...
Ok. I understand now.
My main initial fault was in misunderstanding of straight wire impedance.
I thought it was less than 1 ohm, and I need less than 1 kv of voltage amplitude to achieve a kiloampere pulse.
I will dig further in solving my task.
Will be back.
Thank you all.
MHz - megahertz
mHz - milliherts.
That was my mistake. Of course, I need a repetition rate of >1 mega hertz.
Ok. But I am not talking about 50 ohm impedance.
Of course there will be a back route for current, so the load is U type wire.
I think I need to calc an impedance of a free copper wire...
Hi.
I am stuck.
For magnetic force experiments I need to develop a circuit with parameters listed below:
pulse width: few nanoseconds (1-5 ns).
pulse rise time (very important here): < 1ns
pulse fall time: not important, can be more than 10ns
pulse current: >1 kiloamps.
repetitions rate...
Thank you guys.
I have read more in the internet and it looks like the only way to switch on/off the laser beam is only possible by means of deflecting or modulating it with different types of electro-optic effects.
So, I am digging at that area right now.
Thank you again.
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