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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How to detect/measure a direct lightning strike
Is there a DIY way to measure a direct lightning strike without also bringing the strike (or at least a surge) to the measuring device?
I have a rural property with a small mountain on it, and it is ...
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The PhotoMOS's in this design are failing and I'm not sure why
I'm a hobbyist. I created my own PCB to switch HV. It's to control my underfloor heating units. I built three of these devices and of one of them, the PhotoMOS's are failing one by one.
The device ...
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Stacking Diodes in Series for More Voltage Standoff
I've seen implementations of series diodes for higher voltage standoff use parallel resistors to force the series string of diodes to share reverse voltage equally. However, are these resistors ...
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Scope: how to measure fast (1 µs rise time) signals at high (320 V) voltages?
Short version:
How to measure fast signals (around 1µs rise times) at voltages too high to have the fingers anywhere nearby (320 V)?
How to attach scope probes without having long wire/loops that ...
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Is this circuit correct and will it work as intended to detect muons via Geiger-Müller tube
I am working on a project in which I wanted to detect muons using a Geiger-Müller (GM) tube. The problem is that the GM tube that I will be using is not any standard one and instead I will take out ...
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Potential, references and electrical shocks
I designed a prod, and I think it works decently. The voltage is raised from a battery cell to a DC high value (1000 V), the current is limited to a safe value and there isn't anything wrong yet. ...
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Voltage controlling a tube blocking oscillator
I'm trying to understand a tube circuit from the mid-1940s which appears to control the frequency of a blocking oscillator by applying a DC voltage (between 150 and 600 VDC!) on the grid of one half ...
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Laser power supply repair and possible improvement
Have here power supply for laser machine, on tag is written 50000 V 40 mA 2000 W.
Inside are capacitors with name WUXINDA ELECTRONICS KMQ 105°C 250 V 2200 uF and 450 V 680 uF. Did not manage to find ...
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LTspice full-bridge simulation fails after switching event
I’m simulating a high-voltage MOSFET full bridge in LTspice 24.1.5 (Windows) using IRS21867S gate driver models and discrete NMOS devices.
A half-bridge version of the circuit simulates correctly, but ...
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Determining a replacement for a faulty high voltage diode
I have an x-ray head with a faulty HV diode. The specifications of the x-ray: 70 kV, 8 mA with high frequency generation of no more than 70 kHz.
The head includes a HV, high frequency transformer and ...
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HV solid state switch testing
I want to test different switches (MOSFET IGBT SCR) at around 2kV in a half-bridge circuit to see the increase of the discharge speed compared to just RC discharge. I want to do this first with just a ...
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(7 mA, 70 kV) X-ray tube current half its normal value and no exposure
I have a Siemens x-ray that gives no exposure.
What is weird is that the measured tube current during exposure time is almost 3.4 mA and no exposure is present.
I followed the service manual and came ...
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How to allow smaller clearance between two specific high-voltage nets?
I have a PCB with an ~80 V DC bus. For safety and creepage I want 0.6 mm clearance for this voltage everywhere on the board, which I have set up using a net class.
However, I have two nets that are ...
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High Voltage Electrostatic Switching Circuit
As you may see in my post history, I have recently asked a question about electrostatic adhesion, and this is a follow up question of sorts. I have scoured the internet looking for components for a ...
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When a gas discharge tube tester fires, the microcontroller resets. Separate grounds? [closed]
A gas discharge yube (GDT) threshold voltage tester generates a high voltage ramp with a flyback transformer. When the GDT fires, from my understanding the return path raises its voltage due to this ...
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