Questions tagged [high-voltage]

Questions related to the design of circuits that supply or use a high voltage. There are a few definitions but the IEC definition of a high-voltage supply system is above 1000 Vrms AC or 1500 V DC.

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1answer
45 views

Plasma damage to body cells

Can exposure to plasma or energy from Tesla home windings damage the body's cells? More generally, will the plasma or energy from the Tesla coil ionize?
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1answer
42 views

High voltage Dickson charge pump switching

I am working on a circuit based on the LT1930 (DC634A) to boost input voltage between 30 and 90V. I would like to take this boosted voltage and double it via a Dickson charge pump to the required ~...
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3answers
58 views

How to increase a transformer's primary voltage rating?

I want to know if there's a way to operate a normal (250 VAC primary rating) transformer at higher primary voltage levels, as I have an AC voltmeter project using a microcontroller (currently using ...
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4answers
130 views

what role does transmission line termination take in long distance power lines?

Does transmission line theory and transmission line termination take any significance when dealing with long high-voltage power lines? Do power companies terminate their power lines to avoid ...
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3answers
109 views

how to step down both voltage and current for high power

I have looked at Buck converters, voltage dividers, and current dividers, but I have not found a way to divide, BOTH, voltage AND current + being able to do it over high voltages and currents. With ...
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2answers
37 views

Calculating resistance value for voltage range

I have been working on a DIY Nixie tube clock. Looking at the schematic for my specific Nixie tubes, the ignition voltage is 170V. This led me to buy a 12V - 170V boost converter. Using this I can ...
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1answer
68 views

Cockcroft-Walton generator producing unexpectedly low voltages

I'm trying to build a high voltage DC power supply from AC 220V mains. At the moment I'm just trying with one stage of the depicted CW generator. The components I'm using are: 1N4007 diodes Panasonic ...
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2answers
65 views

I need help for design high voltage buck converter

I have a 500 Vdc from rectified 3 phase power and then I will make output to 220 V phase to phase 60Hz power. But 500 Vdc doesn't stabilized and Its need to step down to 220 Vdc stabilized. So, I use ...
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2answers
54 views

Dangerous step potential with low (line) voltage possible?

I've always read about step potential in terms of substations and high voltage powerlines, where we are talking in the kilovolt+ range. What if there is a manhole cover and a mains(240V/400V) wire ...
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2answers
38 views

Delta-Wye transformer differential protection during external line to line faults [closed]

During these kind of line to line faults current flows in the faulted phases of the secondary and all phases of the primary as it is shown in the image. So now the currents in phase A are not equal to ...
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1answer
60 views

Required voltage rating of PCB terminal blocks with high voltage power supply

I have designed a power supply with a 3kV output. I need connect it to external heat-sinked load. I have purchased some 15kV twisted pair cable to do this. I am unsure the best way to bring this ...
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0answers
50 views

Tektronix P6015 Replacement Potentiometer Considerations

I’ve acquired (saved from the landfill) an old Tektronix high voltage probe, model P6015. The probe body and cable are in decent condition, but I discovered two damaged potentiometers in the ...
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41 views

Negative high voltage

I want to make power supply which will have output 0 V and -HV. I have HV transformer and voltage multiplier. Scheme in picture bellow. My question is: is possible to connect this multiplier with ...
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55 views

What is the most effective way to prevent electrical arcs across resistors?

When building any kind of ultra high voltage boost circuit or transformer, the high voltage will often arc between components if the voltage is high enough and the distance between them is short ...
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33 views

I need help to adjusting factors in the high voltage charger circuit for ignite spark plug

A few days ago, A lots of peoples help me to get direction of high voltage circuit for ignite spark plug. I appreciate for your help. Finally, I found enough circuit. It flow 6A averaged and 18A peak ...
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1answer
74 views

Solid State Relay/High Voltage Switch unacceptable transient behavior

I am using a whole array of IXYS CPC7524 high-voltage switches in one of my designs. Although the design of this specific switch is not made explicit, its characteristics and other products in the ...
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2answers
70 views

Determining voltage by arc length

Ludic science light dimmer driver I was watching this video made by ludic science and at 3:14 he said that at the maximum output of the high voltage ignition coil, the distance was 10mm/1cm which he ...
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3answers
98 views

Current transformer energy harvesting from a mid-voltage line

I'm planning on harvesting energy from a 33kV line which has an average 10rms A current. The main conductor (N1) has a overall diameter of about 13mm.In the beginning I tried to harvest around 3-4 W ...
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0answers
28 views

How to protect power supplies and pulser in DC bias + high voltage pulser combined circuit?

I am building an electric circuit in which a DC bias power supply and a high voltage pulser are mixed. I need to save each one from the other with proper safety measures. I have researched several ...
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1answer
37 views

Power consumption in voltage multipliers

Cockcroft–Walton generators and Marx generators are voltage multipliers. These circuits contain various diodes, capacitors and resistors that charge the capacitors in parallel and then put them in ...
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0answers
80 views

Diy arc lighter

I am trying to make an arc lighter, tried rewinding primary of ccfl transformer/inductor with only few turns and made my own with inductor I got from cfl circuit, they all worked fine for some time ...
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1answer
51 views

Killswitch: switchable high voltage path/shunt to ground without any additional power supply

I have a circuit with a high voltage source (rectifet 400VAC) (part of a capacitor discharge ignition.) High voltage should only be available if normal power (low voltage DC power supply for the rest ...
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0answers
24 views

How to calculate the intrinsic drain voltage (Vk)?

How to calculate the intrinsic drain voltage (Vk) using TCAD results. I didn't find a good explanation online, only compact models that doesn't help in TCAD simulation. I want to plot Vk, which ...
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44 views

Spark Gap Circuit Creating Unpredictable Current Spikes, What is Causing This?

I have recently been messing around with bug zapper / spark ignitor circuits as a way to learn more about high voltage electronics (This is my first foray into high voltage territory other than a few ...
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1answer
43 views

Ideas for driving an electromagnet with high voltage AC current from a PCB

I have an aquarium pump that is no longer being used and I want to integrate it into a design of mine. I am inexperienced designing for stuff with high voltage AC or AC current in general. i've done ...
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33 views

Parallel Resonance in Ultrasonic Transducers (Langevin)

I am working on a power-supply for ultrasonic welding machines and want to drive the transducer at its parallel resonance. The Butterworth-Van Dyke model paramters are : L = 24.73e-3; C = 1.14e-9; Cos ...
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3answers
82 views

Components for adjusting the current and voltage of a very high energy power supply

I have two microwave transformers in series connected to a Cockroft Walton voltage multiplier. This allows me to generate well over 1 million volts (measured by spark gap) at high current (it looks ...
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2answers
74 views

How would you apply high voltage on a piece of dielectric making sure breakdown does not occur?

Say you have a piece of dielectric with a breakdown electric field, BDE. For some experimental requirement you have to apply an electric field, E > BDE, across the piece of dielectric without ...
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2answers
84 views

Why are microwave oven transformer laminations not insulated?

I know that it is a peculiarly designed transformer, but I never found any explanation (and nor even questions) about that before. I know that soldering the lamination in the edges for instance won't ...
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1answer
34 views

Voltage value after generators in the power grid

What is the value of the voltage before the step-up transformers and right after the generators in the power grid? I mean the generators connected to the high voltage grid through step-up transformers....
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1answer
55 views

Square wave from high voltage power supply (5kV)

I working on a project involving dielectric elastomer actuators and need to generate a square wave from a 5kV power supply (SRS PS350). The operating frequency will be 0-50Hz. What's one circuit I ...
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22 views

How much self induction would each coil of a transformer of one to one ratio be if the kVA rating for that transformer is 160?

Assuming a current load of 80 A, and a voltage load of 1600 V, the straightforward kVA rating would be 128. But adjustments are made for power factor correction and other considerations raising the ...
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2answers
110 views

Wiring a panel kilovoltmeter

I am planning a design for a high voltage (2.5kV) DC power supply to drive a HeNe laser. I would like to add a panel voltmeter at the power supply output to ensure it's operating correctly. I found a ...
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1answer
79 views

LM338 is getting hot and stop working when we try to flow current more then 1A

I try to make a 30 V, 5 A power supply using LM338 (without heatsink) voltage regulator IC. In my case the value of R1 is 100 Ω and R2 is 2.2 kΩ. then it gives 29.6 V as output. when we connect a 10 ...
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37 views

Will this Flyback Circuit work ok?

This is a follow on question to a previous post about enhancing inductive spikes as I couldn't add images to a comment. So I have revised my approach somewhat in that instead of using back EMF pulses ...
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3answers
89 views

Turns ratio of transformer not on datasheet

I'm currently looking for transformers to generate high voltage spikes (several kV) on the secondary by suddenly changing the voltage (and therefore the current) on the primary. Ideally, I'd have a ...
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0answers
80 views

Risks of riding E-bike under high voltage power lines

I've recently experienced a small electric shock each time while I was passing under international power lines for 3 times. They transport at around 330K volts. While it didn't hit me really hard, a ...
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2answers
129 views

How can I use the voltage generated from inductive kickback?

I'm designing a circuit that requires a high voltage pulse in order to fire a spark plug. I'm thinking of using an inductor to provide this pulse (via inductive kickback), but I'm struggling to figure ...
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2answers
133 views

Why don't microwave oven transformers state their output voltage?

This is a simple question that I haven't found in anywhere before: Why don't MOTs state their output voltage? I mean, I've been in a junkyard looking for MOTs and I've found about 30 MOTs of 5 ...
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2answers
79 views

What is the pinout of this transformer?

I have a large transformer and I just can't figure out its pinout. I simply want to make a high voltage circuit but can't find the proper coils. One side has 2 wires whose resistance is 0.8 ohms and ...
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3answers
85 views

Best-practices for potting a high-voltage circuit

Can someone recommend best-practices for potting a passive DC high voltage (<20 kV) circuit? I'd like to eliminate a micro-discharge problem we are seeing. Details of our use-case follow: I have a ...
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0answers
53 views

Induction heater mosfet arc

I am building an induction heater and connected everything up. Once I connected the circuit the first time I tripped the breaker. The main breaker was only a 20Amp coming from the wall. I realized I ...
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1answer
48 views

Switchable bleeder resistor for very high voltages

I've got a very large capacitor which is likely to be storing up to 5 kV. When it is turned off, I want to be able to discharge it using a bleeder resistor (or similar) so I don't risk injuring myself....
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2answers
105 views

Cockroft-Walton circuit use in bug zapper

The basic Cockroft Walton circuit consists of 3 stages of diodes and capacitors creating a voltage of around 1860 from standard AC 220V/50Hz supply. I tried creating a bug zapper with the same circuit ...
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1answer
56 views

Automation panel: what would cause a 135v input voltage?

I am building a home automation panel which is fed by 120v AC input mains power. The first connection in the panel is a GFCI breaker followed by 5v and 12v switched PSUs which power a relay board and ...
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0answers
47 views

Fast rise time reed relay

I am currently working on a project related that I asked before here. The purpose is to have 2ns rise time 30ns pulse width at 250V (with 50ohm load). Repetition is 30hz. I tried avalanche transistor ...
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0answers
51 views

High voltage booster with continuous output?

I need a module that can take a DC voltage of 2V - 12V continuously as its input and produce atleast 2KV DC continuously as its output. I've come across high voltage generator boost modules but they ...
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1answer
252 views

MOSFETs in high voltage low current applications

I am constructing a circuit designed to release a very brief pulse of current at a voltage of 1000V. A low power DC converter is used to charge a 0.1uf pulse capacitor to 1000V, and then I intend to ...
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0answers
32 views

Flyback transformer driven using a H-bridge damages flyback?

I tried driving a flyback transformer salvaged from an old tv, a couple of days ago using a H-bridge driver which I made in past. The pwm signal used to drive is between 62KHz to around 8MHz, this ...
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2answers
77 views

Regulating high voltage high current ac supply

I am trying regulate ~250 ac to have regulated 400v 5A dc. I have a variac and also a step up transformer (1:5). I know for this type of high voltages full bridge SMPS are used. But actually I don't ...

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