Converter In-Rush Thermistors etc, UPDATE -4
UPDATE on 17 Nov, Update 2 on 22 Nov, Update 3 on 16 Jan 14, Update 4 on 19 Oct 14. --------------- In a recent thread there was mention of how you can wreck your gizmo (in my case a converter) ...
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OK, let's say the energy dissipated by the thermistor is 1/2CV^2.
With C = 2400uF and V = 170V, we get E = 35.5 J. The part that's failing, per spec should be failing at 300 J. There's almost a factor 10 difference. That equation does not fit the bill.
Sal
With C = 2400uF and V = 170V, we get E = 35.5 J. The part that's failing, per spec should be failing at 300 J. There's almost a factor 10 difference. That equation does not fit the bill.
Sal
ken white wrote:Salvo wrote:
...The energy absorbed by the thermistor is I^2 * R * t. Where I is a exponential function of the RC time constant.
Sal
Calculate the RC time constant, and energy consumed, for me in a thermistor RC controlled circuit...
Since R varies with temperature, the Thermal Time Constant and absolute energy consumed is what is used...
