Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

0
votes
1answer
108 views

TVS bidirectional diode not working

10x bidirectional diodes 1.5KE400CA in series, balanced, then the chain in parallel for DC line protection. Breakdown voltage 400V per diode. Still got 10kV+ voltage spikes (picture below, x100000 ...
0
votes
1answer
27 views

Specifying parts for Induction Heater; how to determine current requirements at transformer? [on hold]

I'm working on specifying parts for the following circuit: I intend to have a very large work coil, (like 12" diameter) so I'm expecting to need a lot of power. I'm on a tight budget, though, so ...
1
vote
1answer
42 views

boost converter to high voltages (20kv+)

I am interested in making a mini, potentially portable ion thruster. The Question: Is it possible to create a boost converter that takes low voltage batteries ranging from 3.7V to 24V and boost that ...
0
votes
1answer
54 views

What should be switching voltage rating of relay in a 380VAC 3 phase system?

I am hooking up a system where there is 2 sources of power available. One source is the grid power, and the other is a generator. The grid provides me with 3-phase 380VAC with a neutral wire; and on ...
2
votes
2answers
97 views

Please help with safety of this circuit. Safe to plug in?

I have been working on this circuit as a project for school for a few months. Here is the schematic It is a pulse generator that produces 100ns pulses at 220VDC. These are used to drive an ...
-2
votes
0answers
49 views

Why Don't Birds Get Fried While Approaching a High-tension Line [duplicate]

So, I was watching a video in which a high-tension line worker approaches a live line with a conductor. This is because the chopper is at zero potential, and if a conductor is not used, the arc may ...
0
votes
3answers
80 views

Xenon Flash thyristor trigger

I'm building a xenon flash unit with a power of 50Ws (300V 1000uF capacitor). I need to trigger it from a microcontroller. For that I use a MOC3041 to opto isolate my µC from the HV circuit and ...
0
votes
3answers
52 views

Are creepage and clearance value in common standard relative to ground?

So I have been researching creepage and clearance for a few weeks now and I think I have a pretty good understanding of the concepts. However what I do not understand is some of the interpretations of ...
1
vote
2answers
104 views

PCB Design- 4.5KV

Guys I am new to the PCB design. The PCB I am designing has a connection to 4.5KV. I have a question related to the ground pour, should I avoid the ground pour on the entire top layer or should I just ...
0
votes
0answers
54 views

Using High voltage DC supply to bias an operational amplifier

I am using FS05CT-12 high voltage power source to bias PA91 op amp. Please see below for the schematic I am using. I want the op amp to be biased between ~±100. At input voltage 0.8V, the power source ...
0
votes
2answers
78 views

Charging a high voltage capacitor with power supply. How exactly?

I have a semi-serious hobby project with a couple of friends where we need to charge a pulse operated capacitor rated to around 4kV with 1500nF capacitance. For this I need a high voltage supply and ...
0
votes
0answers
58 views

Ground Test with MID400 (Optoisolator)

I design my controller, one of the tasks of which is to check the operability of grounding in an AC line. The controller will be built on the basis of ATMEGA328P (Arduino UNO), in the high-voltage ...
1
vote
3answers
95 views

High voltage to low voltage in ps/nanosecond time (Zener/opamp?)

So I have a signal that goes from 0 to ~800volts in 30ns. I would like to use this signal to trigger a camera (input impedance of 50ohm) which takes a max of 10 volts and requires the rise time to be ...
0
votes
2answers
109 views

Amplify my 3.3V DAC signal to 220V

In one of my projects I need to generate different kind of 220V amplitude waveform signals in order to send commands to a heater using the pilot wire protocol. Here are the needed waveforms: Is there ...
0
votes
1answer
43 views

Question about a high voltage setup/scenario

I was wondering what would occur in the following setup. Say you have an circuit basically like this: V1 is a source of high voltage (high enough for corona discharge to occur), and no current can ...
0
votes
0answers
102 views

What are these devices on the 11KV power lines

What are these devices being installed on the 11KV overhead power lines around Sydney Australia. See Picture at https://imgur.com/dRELdVK
1
vote
1answer
59 views

How to convert high voltage DC at low amps to low voltage DC or AC at high amps?

How to convert high voltage 500 volts DC at very low amps to lower voltage 12 volt DC or AC at high amps? Must I use an electrostatic motor or can I use an op amp? The reason I am posing this is a ...
2
votes
2answers
54 views

Will this SOI circuit be grounded?

Upfront, I apologize if this may be a terribly obvious question. I don't have all of the background to understand it confidently. I'm trying to apply a voltage for an electrophoresis experiment ...
1
vote
0answers
371 views

Pulsed DC, kA range inductive transient protection method

I would like to design a transient protection solution for HVDC_pulse_unit. HVDC voltage = 3500V , current > 40kA. Events: D1 flyback diode survives(50kA surge forward current). MOVs section did ...
0
votes
0answers
34 views

IGBT died probably due to Inductive Load, What to do?

one of my IGBT died during its first test yesterday. I want to be able to switch an Inductive Oven (same like many modern hotplates) on and off in a specified Interval (every 3 or 4 seconds for ...
0
votes
2answers
71 views

Can power transformers be used with higher voltages?

I purchased a Japanese transformer for a project I’m doing. It runs on 100VAC, not 120V, something I overlooked. Doing a quick search, Japan seems to use both 50/60Hz, based on the region. It’s 30 ...
2
votes
2answers
54 views

Will a 300A HV connector fail before a 600A fuse does?

I know this is a silly question but I cannot find ant data indicated it will not. The HV connector rated at 300A @ 85C and it is a 600A fuse, I cannot find a connector with a higher current rating. ...
2
votes
0answers
41 views

High Voltage Cascode with MOSFET LT Spice Simulation

I'm an electronics engineering student and want to develop a high voltage switch with normal Si N-MOSFETs. After some research, I discovered cascode switches for this application. Most of these ...
2
votes
2answers
44 views

Wouldn't Charge Flow On Power Lines Due to Capacitance

If I touch one line of an exposed power line (say 300 kV AC) and the rest of my body is freely suspended (only in contact with air), am I not forming a capacitor (to ground)? If I am, are electrons ...
1
vote
0answers
78 views

What is this component and how can I drive it?

A long time ago as a kid I disassembled a plasma globe. Inside was a small board with a box-like plastic-enclosed component. This component has a long wire which leads up to the center of the plasma ...
0
votes
1answer
65 views

Can a coil gun be made with a boost converter instead of caps?

So I’ve been starting to build a coilgun, and I find most designs either have capacitors or are just really bad. But could a high-voltage boost converter (40000v) and a momentary switch not be used to ...
5
votes
1answer
145 views

Home made High voltage Capacitors

I'm building my own high voltage capacitors, for science, and I'm running into an issue. I'm 90% sure what I'm looking at is coronal discharge but I wanted to be certain. The caps are two aluminum ...
1
vote
3answers
116 views

Current sensing on negative 1.1kV DC rail

I searching for a way to do high side current sensing on a -1100V DC rail. My HV is generated from the hamamatsu C9619 High voltage power supply module and it powers the hamamatsu R647P ...
3
votes
0answers
70 views

Safety Capacitor Selection

When selecting an X2 safety capacitor what must be taken into consideration. There are only a few types of capacitance ranges and seem to be chosen based on voltage rather than capacitance. Take ...
1
vote
0answers
73 views

Capacitive discharge excess being used for battery recharging

I am currently designing a circuit similar to a cattle prod that is intended to be attached to a drone. The cattle prod is powered by a lithium-ion battery, charging up a capacitor and then quickly ...
3
votes
2answers
99 views

High side current sensing for negative high voltage

I need to monitor the current for a negative high voltage supply. I implemented the following circuit in a simulation program: https://www.maximintegrated.com/en/app-notes/index.mvp/id/1867 But ...
1
vote
2answers
82 views

What is the purpose of galvanic isolation?

Is it correct to say that the primary reason to have galvanic isolation (ensuring minimum clearance and creepage distance for required voltage of power circuit between HV and LV) between the HV power ...
0
votes
1answer
79 views

Looking for resources for determining cable requirements for high wattage (MW) applications

I'm doing some personal research on the specifications for cables that can handle megawatt power draws. As an example, the wires needed to supply 450VAC @ 2000A (0.9MW). I'm looking for wire diameters ...
0
votes
0answers
77 views

Flyback Transformer Output Voltage Testing

Recently, I purchased an electrostatic precipitator power supply as a means of providing a high voltage DC output (-5 - -40 kV DC). The power supply is rated to supply 60 kV DC at 600 W and can be ...
-2
votes
2answers
90 views

Please Critique my HV Measuring Setup

At the moment, I am working on a device that will be able to measure the out put of a high voltage DC power source with an adjustable output of 0 - -60 kVDC and 0-15 mA (the typical power being 600 ...
5
votes
3answers
565 views

High Voltage Measuring System

I am looking to set up a voltage-measuring system for the output of a recently purchased HV power source. The source supplies around 0 - -60 kV DC and 10 mA to my load. Unfortunately, the source does ...
2
votes
0answers
107 views

High voltage 1100 V current sense on the high side

I have the circuit that you see below. My load is a photomultiplier tube equivalent to a 3.63Mohm resistor. My power supply can deliver max 4W (2kV and 2mA). I use it on 1100V and the load draws ~...
3
votes
3answers
197 views

Tool for Measuring Low Current

I currently have a power supply that will be able to supply around -60 kV DC and 10 mA under the load that I will be hooking up to it. However, the internal resistance of the load will fluctuate and ...
10
votes
4answers
3k views

What is the maximum voltage that silicon can handle?

Today, in a race for efficiency, we have moved from transformers to switching power supplies. Almost all PSUs were designed for single-phase low-voltage operation (220Vac/310Vdc in my country). I've ...
2
votes
2answers
98 views

Problem with setting initial voltages in LT Spice

I was trying to set an initial voltage for a capacitor I was modeling in LT Spice, and I tried using the command .ic V(Vc)=20000 (Vc is the node directly after the capacitor, with ground on the other ...
3
votes
2answers
125 views

Type of wire for high voltage applications

What kind of wire is most suitable for HV low-current applications, where the allowed maximum is 25 kV and 5 W? By type of wire I mean core and type of insulation. As far as I can guess, even if the ...
1
vote
1answer
189 views

Current limiting ballast for a transformer

So, guys, I hope you can explain to me how to calculate the necessary parameters for a ballast to limit the current on the primary side of a high voltage transformer.It is for a tesla coil project. To ...
2
votes
1answer
95 views

How do failure modes of high voltage cables play out?

I fix x-ray equipment, and here is the connector that fits into the x-ray tube. It carries up to 150kV, and maybe 500mA during exposure. My boss tells me if I see some black carbon deposit on the ...
4
votes
2answers
127 views

Alternatives to High Wattage Resistors? (Do multiple low-wattage resistors equal a single higher wattage resistor?)

I am a beginner, so I may have made a horrible mistake in my diagram, but I am trying to learn. According as I have figured it, I am having an issue wherein I need a resistor rated for a minimum of ...
0
votes
0answers
53 views

Test Equipment for generating large voltage spikes

I am trying to test a tachometer circuit which takes large voltage spikes from an inductive pick up and conditions them for TTL logic. I need input voltages in the order of 200V peak-to-peak but most ...
6
votes
1answer
111 views

Switch high voltage with triggered spark gap

I want to switch a high current/voltage pulse (up to few 10kV, <1kA) from a capacitor as supply. It needs to be cheap and I don't care about efficiency too much yet. I took a look at using ...
0
votes
0answers
21 views

3 switches, one lamp with existing wiring [duplicate]

I have an existing wiring with two switches for 1 lamp. How to add third independent switch without changing to much wiring inside walls (usual wiring [with the triple switch in the middle of ...
0
votes
3answers
302 views

Process for Making a Flyback Transformer

I am looking to make my own flyback transformer that can put out a DC voltage from 0 to -40 kV DC and a power of 400 watts, as most commercial flybacks do not go up to the specified power and ...
0
votes
2answers
65 views

High current/high voltage/high frequency measurement

I have a circuit that I'm having trouble understanding. It measures the current flowing through a conductor. The measured load is 20-100 Amps, 9kHz-34kHz, and approx. 340 volts. The main conductor ...
0
votes
1answer
61 views

Damaging BCD-to-decimal decoders?

(ACTUAL QUESTION IS AT THE BOTTOM) I am a beginner in electronics and am learning more day-by-day to my best. I first got interested in Nixie tubes a few years back, so those are what I play around ...