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Hi,
I've noticed in one of my CST simulations that after it runs some portions of the geometry are highlighted red and I can't get rid of the red highlight. Does anybody know what this red highlighting means?
Thanks.
I attached a picture of what I thought you meant. I am trying to create a square wave pulser between a positive and negative voltage rail, so would like to use an off the shelf half bridge gate driver to switch between the two voltage supplies (with a slight delay between to prevent a short)...
Hi Klaus, do you think the Adum4223 could be used with a negative and positive high voltage rail?
https://www.analog.com/media/en/technical-documentation/data-sheets/ADuM3223_4223.pdf
Hi, I am not sure why I am unable to find this, but my searches can't seem to find an answer to this question. Does anyone know of a half-bridge chip that allows a negative high voltage rail instead of ground?
I am interested in creating a bi-polar pulser to switch between a positive high...
There are two estop switches because they are in different locations. One estop is in the experiment room while another is at the control station. They need to be in series so either one kills the circuit.
Hi, I have multiple pieces of equipment that need to be able to be turned off using an emergency off button ESTOP. Because the total current draw is high for all equipment, I need multiple breakers, and consequently multiple contactors. The easiest way to turn off all these contactors...
Hi we are designing a totem pole pulsed power supply and a question has come up about overcurrent situations.
We have a floating power supply, 12VDC connected to a 10uF capacitor. This is isolated from ground and the power supply and capacitor float with respect to the high voltage output...
Hi,
We are building an enclosure for a high voltage pulser with 3 pulsed outputs. The outputs on the three channels are bipolar square waves of +-500V at up to 40kHz. We would like to take some RG59 cable inside the enclosure, and use it to connect the three internal pulser circuit outputs to...
Hi this seems like a silly question, but we've spent way too much time searching and don't see a clear answer anywhere. We have a rackmount electronics enclosure we are going to mount some custom PCB's in, and we would like to find a small din rail terminal bus just to power each of the boards...
Max voltage for a TO-220 case?
Hi I've noticed that design guidelines for high voltage PCB spacing (e.g. creepage.com) are much larger than the actual distance between pins on a TO-220 case. For example, the 1242-1183-ND from Digikey is a diode in a TO220 package that is rated to 3.3kV DC...
The drain is at 500V and the source is at 0 most of the time, but my question is more general.
For a power mosfet, if the source is higher voltage than the drain, will current conduct through?
I hope c_mitra isn't implying that the factors mentioned do not affect breakdown - because they do. The factors mentioned (environment, field strength, geometry, surface roughness, surface cleanliness, pulse length) 100% affect breakdown in vacuum.
The physics of the actual mechanism can range...
We are building a bipolar pulsing circuit with a couple power mosfets (**broken link removed**) and we will have an MOV in place to limit overvoltage from a potential arc to the output of the pulsing circuit. The output is a grid electrode for pulsing an electron beam, but it is modeled here as...
The electric field between electrodes will potentially cause an arc depending on your environment (vacuum vs air vs SF6), field strength, geometry, surface roughness, surface cleanliness, pulse length etc.
Hi Sunny, yeah the slow response of a spark gap is why we were thinking MOV, but we might need to do a spark gap on the 20kV line because I haven't seen an MOV with an operating voltage that high.
I'm trying to find a 10k resistor rated to 80kV (with >10W) and having some trouble but I'll call...
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