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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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71 views

Crockcroft-Walton Voltage Multiplier Large Voltage Loss

I have a CW voltage multiplier that uses 30kV, 1nF capacitors and doubled 20kV, 5mA, 100ns diodes (for a total of 40kV). My ac source is a sine wave (viewed on the primary side of the transformer ...
0
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0answers
40 views

Regulate ~350V spikes (duration nanoseconds) to logical level 5Volts

Use standard 5.1Volt zenerdiode? Can I trust that with zener diode it wont leak over 5 volts, concerning fast raising high voltage spikes. How about resistor sizing, the input goes to Arduino ...
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0answers
27 views

Switching between high voltage power sources [duplicate]

I need to get an LED to switch on once the voltage across a capacitor goes above 40V. It must then remain on from 40V to the maximum voltage reached by the capacitor which is currently 1200V. The ...
1
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1answer
32 views

Interference from well pump pressure switch and microcontroller

I am using the Parallax Propeller to start and stop timers for an auto racing timing system. Out of 250 cars there were timing issues with about 10 or so. It was very random and hard to diagnose. I ...
1
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3answers
872 views

Can I connect a DC high voltage booster directly to my Raspberry Pi? [closed]

I have one of these modules: Is it safe to connect it to two pins to my Raspberry Pi, directly, and turn it on by emitting HIGH on one of the pins (the other ...
1
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0answers
34 views

High voltage pulse discharge ring dampening (how to save a pulse capacitor)

So I have a high voltage pulse circuit. I have planned it to be around 90kv with the capacitor being 1.3uF. It is to be discharged through a spark gap. Before I test it, I of course want to save the ...
5
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4answers
851 views

High voltage LED indicator 40-1000 VDC without additional power supply

I would like to make an indicator to show that DC bus (700VDC) capacitors are charged (be careful!). What is the best way to make a LED indicator, which will work for a long time from 40VDC to ...
2
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1answer
129 views

500v generation with 24V, request for current limitation

I am generating 500V from a 24V source. Attaching schematics. This circuit is generating stable 500V. I am attaching a load of 7 kohm. In the schematics the buck regulator is supplying 19V to the ...
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0answers
62 views

500v generation with 24V

I want to generate 500V @100mA from a source of 24V @2.4A. My question is that would it be possible to maintain this current? Any clues please.
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1answer
61 views

Switching 1875 Volts through a relay

I am trying to create an electroadhesive device that I can switch on and off easily, however, after using one relay that worked beautifully to do this function, I went out and bought a 4 channel relay ...
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0answers
35 views

Should I add a DC link capacitor between HV battery and buck DCDC converter?

My application does not require an Inverter. If i don't need the capacitor,is it still better to add a resistor to drain any other system capacitance voltage?
1
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1answer
77 views

High voltage and current

I have a DC motor that needs and works nearly 400v and 20A. I chose FDL100N50 for n-channel mosfet also IXTK40P50P for p-channel mosfet. I connect a 4n35 optocupler for output of every mosfet. Are ...
3
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1answer
91 views

Transformer Insulation - High Voltage can Jump Through Ferrite Core?

First of all, I really searched the topic on both EE.SE and Internet but could find nothing. If this is asked before, please forgive me. As I stated here earlier, I was working on an HV amplifier. ...
0
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1answer
97 views

Isolated High Voltage Amplifier Idea

Test laboratory of our factory asked me to design an isolated high voltage amplifier. Here are the requirements: The circuit will be built with transistors and passive components in the lab. (No IC ...
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0answers
18 views

Under what conditions does a VSC require a DC-link capacitor?

For basic, conventional converters, such as the three-phase two- and three-level converters, the use of a DC-link capacitor makes sense to me. Considering only reactive power applications, it makes ...
3
votes
3answers
58 views

High voltage dielectric breakdown & layering insulators

I’m going to use 230 kV as the reference voltage for the example below; I know if I put a piece of metal too close to a 230 kV source it will breakdown the air and jump to the piece of metal causing ...
2
votes
3answers
73 views

How to measure voltage of each bank in a Marx Generator?

If I have a 10 stage Marx generator with each stage at 2.5kV, when I erect all the stages the last stage's negative terminal will be at 22.5kV with respect to ground. If I want a voltage ...
2
votes
2answers
47 views

Creepage on SMT DIP package with an NC pin

I'm having trouble understanding how the CPC1972GSTR can have the specs it does. Here's the datasheet. In particular, it has a blocking voltage spec of 800V, but if you look at the recommended ...
2
votes
1answer
149 views

Why is parking not allowed under some overhead power lines? [closed]

At work, among others, we have overhead power lines for the main grid connection (400 kV, about 1600 MW). The power lines cross a parking lot, and the positions directly under the power lines are ...
0
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2answers
133 views

Controlling high voltage devices with Arduino Relay module

Goal: I want to build a circuit that converts 700V DC supply to 700V pulses of 15ms duration. From what I have learnt from online, is that Arduino controller can be used with Relay module to control ...
1
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1answer
43 views

TO-247 High Voltage pin clearance

I am using IXYH16N170CV1 IGBT's mounted at the edge of a PCB. The legs will be long and bent back to reach the heatsink shown in the image. This device is rated for 1700 V and 16 A. My nominal ...
0
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0answers
46 views

600V buck converter starting circuit

I'm trying to design a control circuit for the following problem. After pressing a mechanical switch, a 24V battery kickstarts my circuit that triggers the high voltage system by toggling the HV ...
0
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1answer
118 views

Is this DIY high voltage AC generator safe to use?

Making a DIY type high voltage AC power supply from 40 W soldering iron, 220 V AC to 12 or 6 V AC step down transformer and 5 A fuse. These things are ALL connected in series to the 220 V AC mains. ...
5
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3answers
5k views

How do I measure a voltage greater than 5 V with Arduino? [duplicate]

I want to measure a varying voltage with an Arduino and real time data plotting has to be done. But the supply voltage will be 10 V and the Arduino is not supposed to have more than 5 V. Is there a ...
1
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0answers
50 views

Connecting the secondary side of ignition coil to earth

I have an ignition system used for some application. During the testing I found that spark plug is producing EMI due to spark occurrence and high voltage is traveling through the wire. So to ...
2
votes
2answers
105 views

Powering a 3 Phase 230VAC Motor with 28 12V Batteries wired in Series

Mechanical Engineering student here. I'm a part of a senior project team that trying to run a 40 HP 230 VAC three phase motor with a 40 HP VFD for a hydraulic pump. Our plan is to wire 28 Lead Acid ...
0
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2answers
127 views

Is there any way to noninvasively/invasively measure the current/voltage (Power) to get actual power consumed by load?

One of the application im working on needs three phase power measurement to be done through micro-controller. The power measurement is in the range of 90kVA. Is there any way to noninvasively/...
0
votes
1answer
124 views

Sizing a trace on a PCB to carry 50 amps

Currently working on a 4 layer pcb-card where I need to trace for 50 amps, any ideas how I can design it? Any tips would be appreciated. Thanks!
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0answers
112 views

Charging a capacitor at high voltage

I succeeded in making a small high voltage arc without using electronics components (diodes, transistors,.. ) using this diagram: motor turn on & off a switch connected to power supply and ...
0
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1answer
65 views

Read High voltage from PIC16F [duplicate]

I have planned to build a circuit to display voltage and time value using PIC16F877A micro controller.To do this i tested the circuit using Proteus software as i attached here. It can display up to 5V....
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0answers
62 views

Measuring High Voltage DC Using ESP32

I want to read high voltages, around 150VDC, using a ESP32. I plan to put this as an input into the ESP32 ADC pin. But of course, i shouldn't have voltage that high on the input of a ESP32. In ...
1
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1answer
42 views

max. switching power of relay in datasheet

I want to use SPST relay to control resistive load as well as inductive load i.e. ceiling Fan (Load<150W). I used the 5VDC relay (HF46F-G) which is capable of 7A current, 250VAC. Datasheet: http:...
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0answers
40 views

How to control charge on a high-voltage capacitor after voltage multiplier?

Can anyone think of an electronic way to control the charge on a high-voltage capacitor that is fed by a multi-stage voltage multiplier? I can control the charge on the way up by controlling the ...
1
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1answer
36 views

Check for live high voltage shielded three phase conductor

We would like to know if a shielded high voltage cable 8000V AC, 3 phases, is "live". Whether there is current flowing or not. Ideally we design a little device that's strapped around the cable (...
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0answers
65 views

What calculation can be used to predict the voltage across an air gap as a plasma spark discharges over 1ms?

I am trying to determine what voltage and instantaneous current is available if using a spark gap in air or other gas. Comparable to an auto ignition. This will be DC current. There will be a main ...
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0answers
53 views

Effect of insulated high voltage wire to micro-controller

I am investigating a home appliance product which is reported out of order. Having disassembled and checked, I found the power and ground pin of the micro-controller is shorted. In this product, ...
3
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2answers
117 views

What is the breakdown voltage of vegetable oil?

I’ve done a little bit of research and I can’t find any source that has the voltage breakdown of plain vegetable oil. Maybe I missed something somewhere but I could use some help on this. Or a ...
0
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1answer
45 views

Circuit for high voltage pulses using raspberry pi PWM to drive a piezoelectric actuator

I am trying to engineer a device to separate red blood cells from blood plasma in 100mmx1mm capillary tubes using the raspberry pi GPIO pin PWM feature and a piezoelectric actuator. The pulses ...
2
votes
1answer
132 views

How to generate a high energy electromagnetic wave? Using high voltage or high current?

I am about generating an electromagnetic wave which should be powerful enough. So I should manipulate its electric field and magnetic field simultaneously. As far as I know E amplitude depends on the ...
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2answers
112 views

Germanium transistor in high voltage

I want to make one of those circuits using an old PNP germanium transistor (2SB175) what values of resistors should I chose and which circuit is good ? , if the circuits are bad, is there any better ...
3
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2answers
123 views

High Voltage Regulator

I have built a valve/tube tester. To provide the various screen and plate voltages I'm doing this: The required voltage is selected by a rotary switch down the stack of zeners. The momentary button ...
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0answers
34 views

Inverting and Adding a High Power Signal

I need to build a circuit that will output 50 KHz pulses of a 0-100 volt (50 volt amplitude, 50 volt offset) of a 5 KHz sine signal with every other pulse inverted. In essence, it will have the shape ...
0
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2answers
102 views

Transformer - I connected 50k resistance which burnt - why? AC

Wall supply gives as much power as a component uses. I'm trying to connect a 800W transformer to produce an arc of electricity. But I can't exceed 10A because home fuse will triger (so every device ...
3
votes
1answer
173 views

High neutral to ground voltage, and other problems

The situation I will describe is in a rural property that recieves only one wire from the power grid at 13.5kV. We have a single phase 25kVA transformer, that is shared with another house. On the ...
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2answers
119 views

Can I use any HV Probe for a Voltmeter/Ampmeter gauge?

I purchased the multimeter pictured below for a high voltage power supply I'm working on. It's rated for 100V DC and 10A, but I hope to measure several thousand volts. Is it possible to use a HV ...
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2answers
116 views

Is converting high voltage AC into high voltage DC possible for my application? [closed]

I want to convert 2,320 volts AC into 1,000 volts DC. But I’m not sure if I can do this with my transformer KVA rating. My power source is a 20 amp 120 - 125 volt outlet. With testiing the outlet ...
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1answer
84 views

Switching high voltages with MOSFET at high frequencies

I need to rectify 220V 50Hz AC power to obtain 48V DC output voltage. Up to 40A current can be drawn from the DC side. 10% ripple is acceptable on the rectified voltage. I am considering two ...
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0answers
93 views

Power source switching circuit - 60-80V sources

I have a circuit I'm working on that has two power sources, one varies between 40-60V, and the other is 72V. The 72V power source will typically always be on, and the 40-60V source may be on or off. ...
6
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2answers
156 views

High Voltage Capacitor Lead Clearance

I am designing a high voltage board, 10,000 VDC. I wish to use a suitably rated capacitor such as the DHR4E4A102K2BB. When I have been studying the ...
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0answers
39 views

relay causing problem to controller

I have a relay which is electronically controlled by a computer (Odroid) and used as a switch for a high power circuit. The computer and the other circuit are powered with different plugs on the same ...