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Rapid Prototyping tips

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gary36

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I am trying to design a high voltage power supply with following specifications:
No Load output supply: -6kV to -7kV
Max o/p current: 400mA
Power: 200W
Input: 230V AC
Trip Current: Configurable from 10mA to 50mA
Supply type: SMPS

Please suggest a scheme to use already proven design techniques to rapidly prototype this power supply.
 
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If you are delivering 400 mA @ 6KV =~ 2400W thats a challenge. Thats not including efficiency
factor. And you say you only want 200W.

And you say max Iout = 400 mA but you want it to trip at 10 - 50 mA ?

Not sure I understand what you want to do......
 
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gary36 said:
I am trying to design a high voltage power supply with following specifications:
No Load output supply: -6kV to -7kV
Max o/p current: 400mA
Power: 200W
Input: 230V AC
Trip Current: Configurable from 10mA to 50mA
Supply type: SMPS

Please suggest a scheme to use already proven design techniques to rapidly prototype this power supply.
Click to expand...
You can start with TV CRT Flyback power supply, very close output voltage and Power Rating. Simple PWM to adjust output voltage and current.
 
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Half bridge resonant to make life easy on the o/p diodes - this is a real thing - the diodes are quite affected by switching edges

transformer designed by someone skilled in the art of resonant step up power electronics design
 
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This supply is for ion pump. I have to design a supply for max load current of 400mA. It is not nominal current. yeah, I messed up with the power ratings. For ion pump trip current settings are variable from 10mA to 50 mA, depending on the model. For the time being, trip settings can be ignored.

Here is the summary: -6kV to -7kV +/- 5% @ 400mA (max), ripple: <100mV.
I am looking for COTS solution for rapid prototyping.
 
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Hi,

the list you show specifies sub-milliamperes output current (for voltages higher than 1kV).
Resulting in much lower overall power. Nothing in th kW range.

Your specification is by a factor of about 2500 higher.

Especially because the high voltage combined with high current there is a high risk to kill somebody. Thus this surely is no COTS product.


Klaus
 
Last edited:
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gary36 said:
Here is the summary: -6kV to -7kV +/- 5% @ 400mA (max), ripple: <100mV.
Click to expand...
100mV @ 6kV = 0.000017 or 0.001% ...

Lets say you have a single stage power supply ...then you need to care for 2x mains frequency. So about 10ms at 50Hz ... OK, let´s go down to 5ms.

C = I * t / V = 0.4A * 5ms / 0.1V = 20,000uF
I doubt you find a 6kV capacitor that big,

the energy stored is 0.5 x 6000V x 6000V x 20000uF = 360,000 Ws = 360kJ
A heavy hunting gun´s energy is 5..10kJ.
Do you understand how lethal the capacitor is?

Klaus
--- Updated ---

gary36 said:
Sorry to all. Missed it all..
Click to expand...
What does this mean?
* close the thread?
* you need 0.166mA?
* you still need 166mA?

Please give clear informations.

Klaus
 
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gary36 said:
I need specifications similar
Screenshot_20241221_164940_Firefox.jpg
Click to expand...
125W/125 mA means output voltage drops to 1 kV at full load. Apparently that's expected for the respective application (ion pump supply). As an engineer designing a similar power supply, I'd however need a complete V/I characteristic specification.
 
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Controller shall be designed for the following ion Pump specifications:
HV: -6kV to-7kV,Current: 2uA to 2mA ( 4 decades), nominal operation, corresponding to pressure of 10e-06 to 10e-09 torr. Short circuit current is 20mA

The controller specifications provided in previous post is generic in nature catering to various pump interface specifications and hence can be ignored
 
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