thannara123
Advanced Member level 5
Hai ,
I require a inrush current limiter Design for an inverter with 1000 watt [230volt rms ,50HZ sinewave]
My calculations are follows [reference - https://www.ametherm.com/inrush-current/inverter-inrush-current-protection ]
Normal current [Ess current] - 1000/230 =4.5Ampere
Inrush Current [300% surge capability] 3000/230 = 12Ampre [approximatly]
Duration of inrush cycle - 1*1/50 = .02second
Energy of the Thermistor - 230 * 1.414 *.02 = 55 Jule
Minimum resistance -( 230 * 1.414 ) / 4.5 Amprer = 40 Ohm
Assuming ambient temperature is 50 degree C So minimum Resistance will be 80 Ohm
calculation gives The NTC with { 80 Ohm ,55Jule ,5 Ampere }
is this calculation is correct ?
If yes Approximately which one select from here https://www.digikey.in/products/en/circuit-protection/inrush-current-limiters-icl/151/page/2
- - - Updated - - -
Do there connect in parallel or serial for the correct value ?
I require a inrush current limiter Design for an inverter with 1000 watt [230volt rms ,50HZ sinewave]
My calculations are follows [reference - https://www.ametherm.com/inrush-current/inverter-inrush-current-protection ]
Normal current [Ess current] - 1000/230 =4.5Ampere
Inrush Current [300% surge capability] 3000/230 = 12Ampre [approximatly]
Duration of inrush cycle - 1*1/50 = .02second
Energy of the Thermistor - 230 * 1.414 *.02 = 55 Jule
Minimum resistance -( 230 * 1.414 ) / 4.5 Amprer = 40 Ohm
Assuming ambient temperature is 50 degree C So minimum Resistance will be 80 Ohm
calculation gives The NTC with { 80 Ohm ,55Jule ,5 Ampere }
is this calculation is correct ?
If yes Approximately which one select from here https://www.digikey.in/products/en/circuit-protection/inrush-current-limiters-icl/151/page/2
- - - Updated - - -
Do there connect in parallel or serial for the correct value ?
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