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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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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 ...
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38 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 ...
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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 ...
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46 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 ...
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2answers
93 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 ...
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2answers
124 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/...
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1answer
115 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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how to get only positive or negative on hv transformer? [duplicate]

I have this setup : generator of 12v 60 hz positive square wave connected to high voltage transformer (input). but the output is positive and negative. my question is how to get only positive pulses (...
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102 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 ...
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1answer
59 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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32 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 ...
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1answer
31 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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35 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 ...
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1answer
34 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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61 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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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, ...
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2answers
114 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 ...
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1answer
39 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 ...
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1answer
116 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
98 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 ...
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2answers
68 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
30 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 ...
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2answers
94 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 ...
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1answer
102 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
115 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
114 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
53 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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88 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. ...
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2answers
139 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 ...
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0answers
93 views

What is the breakdown voltage of the following?

I actually have multiple questions and I decided it would be more efficient if I were to ask a question with multiple questions attached. Background I’m an experimenter that now has a new project in ...
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1answer
126 views

Ignition coil HV power supply damage?

I recently built a HV power supply, as per the link (using a pencil ignition coil). However, I used a capacitor of around 5nf, which meant the supply did not work. The capacitor reduced the amps too ...
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0answers
28 views

Size and weight of DC-DC vs DC-AC at equivalent powers

I am looking at designing two power systems for a project and was wondering, at equivalent power, let's say 10kW, what is the system that is easier to design, can be smaller in volume and lighter in ...
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1answer
55 views

Sticking to high voltage DC Current

I heard that if you come into contact with a high voltage DC current, you will ‘stick’ to it until it is switched off. Why is this and how high does the voltage have to be for someone to ‘stick’ to it?...
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89 views

How to insulate a high voltage PCB trace?

I am making a PCB with a HV power supply module. Namely the C9619 module from Hamamatsu. The module produces up to 2 mA and 4 W of power so the heat won't be a problem The module can produce up to ...
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1answer
199 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 ...
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1answer
41 views

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

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 ...
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1answer
58 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 ...
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1answer
62 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 ...
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2answers
101 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 ...
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3answers
105 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 ...
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3answers
65 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 ...
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2answers
140 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 ...
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2answers
89 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 ...
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3answers
100 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 ...
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2answers
114 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 ...
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1answer
45 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 ...
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1answer
71 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 ...
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2answers
57 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 ...
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0answers
383 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 ...