RE: Resistive Loads Poor Choice was: HV MMC

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Mccauley, Daniel H by way of Terry Fritz <teslalist-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>


The problem with resistive dummy loads is that they never really represent
load conditions which will really
be used in practice.  For example, if you were designing a power supply for
use with tesla coiling, or any other
type pulsed load condition, a resistive load would be an extremely poor
choice.

One example is that we use a 45kW switching power supply (45kV) for a radar
transmitter system.  The vendor tested these things quite thoroughly using
resistive loads.  However, once the supplies were installed in a transmitter
system, they would burn up within seconds.  After burning a dozen or so
supplies like this, our company finally put a half-million bucks out to
design a high power pulse-load which was then sent to the power supply
vendor.

In summary, resistive loads are a very poor way to test high voltage pulse
systems.

The Captain




 > >Hi again Jim,
 > >
 > >I got out the Ross catalog and saw how Ross makes HV AC
 > voltage dividers:
 >
 > Have a look at how Glassman HV make dummy loads for their
 > 300kV power supplies
 >
 > http://www.glassmanhv-dot-com/TechNotes/Resistance.shtml
 >
 > Steve C.
 >
 > I won't be around for a week as of today.
 >
 >
 >
 >