Corona Inseption Voltage at 80kHz
Corona Inseption Voltage at 80kHz
(OP)
Hello All
I have a requirement to design an Isolation transformer(oil filled) with secondary being 15kV at 80kHz.
To isolate the transformer I have looked into teflon, glass and other isolating materials. When looking at material specification I noticed that manufacturers always give corona inseption voltages at 50/60Hz and nothing at 80kHz. I have tryd to get information form manufacturers but there was no luck there.
Does anyone out there knows the type and amount of insulatiuon I need(kV/micron) to have at 80kHz 15kV. Some graphs would be of great help.
Thank you all in advance
I have a requirement to design an Isolation transformer(oil filled) with secondary being 15kV at 80kHz.
To isolate the transformer I have looked into teflon, glass and other isolating materials. When looking at material specification I noticed that manufacturers always give corona inseption voltages at 50/60Hz and nothing at 80kHz. I have tryd to get information form manufacturers but there was no luck there.
Does anyone out there knows the type and amount of insulatiuon I need(kV/micron) to have at 80kHz 15kV. Some graphs would be of great help.
Thank you all in advance






RE: Corona Inseption Voltage at 80kHz
But - and this is where I have first-hand experience - Partial Discharge (PD) in voids and air gaps in insulation systems and cables is much more pronounced at higher frequencies. This can be seen in cables and motor windings connected to PWM inverters.
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Corona Inseption Voltage at 80kHz
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Corona Inseption Voltage at 80kHz
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Corona Inseption Voltage at 80kHz
200kHz isn't too far off from 80kHz. But who knows maybe someone who actually knows will come along. LOL
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Corona Inseption Voltage at 80kHz
You have a Tesla coil with foot+ sparks?
Are you running a science park?
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Corona Inseption Voltage at 80kHz
RE: Corona Inseption Voltage at 80kHz
It was explained to me that its current because of its frequency traveled over one's skin instead of thru ones body. You could hold fluorescent tubes in one hand and something metal in the other. When you approached the output it would be attracted to your piece of metal. The current would travel through you to fully light the tubes. You never felt a thing proving to me that we were talking surface currents. You sure would feel one of those sparks if they hit you!
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com