We are having a 450V-12V dc-dc converter. How can we design a proper precharging circuit for this?What will be the pre-charging time & resistor value?

More Athulya Valsaraj's questions See All

Sentinel 3 WST - I cannot see that in the Copernicus Open Access Hub?

Does anyone know why I cannot see the option for the WCT or WST in the Copernicus Open Access Hub? How can download sentinel 3 wst details for sea surface temperature and wind

06 March 2023 5,830 0 View

Error occured when calculating the shoreline change in Arcgis 10.8 and DSAS V5.1 ?

I am trying to use the DSAS tool (version 5.1) for ArcMap 10.8 in Windows 11. I am able to output the transects, but the attribute table is empty, when it comes to trying to calculate the...

27 December 2022 1,905 0 View

How to generate distance matrices in PHYLIP format (lower triangular or square) for a large number of loci?

Hello, I need to generate a matrices file that "contains a list of m distance matrices in PHYLIP format (lower triangular or square)" for m number of loci. This is one of the input files for...

27 July 2022 4,924 3 View

Can fungus produce ectoines?

(1,4,5,6-tetrahydro-2-methyl-4-pyrimidinecarboxylic acid

09 March 2020 7,029 4 View

What are some signs that an ECM is overfitting the Nyquist plot?

What can you look for to know that the circuit model being used is overfitting the data. How do you know when overfitting is occurring?

31 July 2024 7,425 0 View

Can a shoot-through event of a tri-state digital buffer cause momentary Hi-Z state?

// interested in the difference between floating events and short circuits.

22 July 2024 6,565 0 View

How can we reduce the porosity of tungsten oxide (WO3) thin films during DC sputtering deposition (target: W, power: 100 W, 75 W, and 50 W)?

We are fabricating a tandem structure where a ~50 nm thick WO3 film is deposited between two metal films using DC sputtering. We use a mixture of Ar and O2 gases at different flow rates while...

01 July 2024 2,686 2 View

Concatenation of consciousness: lessons from motion perception?

Gestalt psychologists have proposed many ways in which items are concatenated within a single block of time so that perceptual elements can be combined into complete objects as defined in space...

29 June 2024 2,441 1 View

Hello friends. Here, can someone help me in connection with hybrid circuit breakers in both ac and dc current, how to simulate different parts of the?

Hello friends. Here, can someone help me in connection with hybrid circuit breakers in both ac and dc current, how to simulate different parts of the breaker in LTSpice or PSpice? And how is the...

18 June 2024 1,486 0 View

Do you have any research or invent about IR sensors?

I want to record a analog circuit between control and power circuits as innovation. My control circuit is IR sensors with bulb size 10mm (its max current to support power circuit is 100m[A] DC)and...

05 June 2024 4,085 4 View

For best fit equivalent circuit model through Nyquist plot why fitting is not good at initial and end of the semi circle arc?

I am selecting frequency range from 10Hz to 10MHz for EIS study of fruit quality, when i tried to fit nyquist plot, I am not able to get best fit when select full range (10Hz to 10MHz) of...

20 May 2024 5,470 0 View

How to reduce notches in input AC voltage for Totempole Power factor Correction circuit?

Respected readers, I am working with a totem pole PFC circuit. In an experimental study, I face a problem of high-frequency notches in source voltage (Yellow one). I found an explanation behind...

14 May 2024 6,692 6 View

What is the physical meaning for the following equivalent circuit?

Can anyone help me to find out the Rs = Solution resistantce and Rct= Charge transfer resisistance of the following equivalent circuit. specifically, which R should I take as Rct. I got this...

12 May 2024 4,358 2 View

How to show the differences between the output voltages on the graph?

Can someone help me, I don't know how to show the differences between the output and input voltages on the graph. I have two voltages at the input: Vin1 and Vin2, at the output I have Vout1 and...

09 May 2024 3,243 0 View

Fabrizio Castaldi

Normally we don't use the Pre-charge Relay, the resistance depend of the total capacity of the condenser, but is normally a resistor of 22ohm 20W.

The time of precharging is normally 200-300ms.

Tony Castillo-Calzadilla

I recommend adding a former RC circuit, depending of Tao=RC, and it should be fitted to 5*RC, for in it be able to reach the around the 90.63 % from the maximum value.

Viktor Todorenko

When choosing resistance, it is advisable to take into account the permissible peak current of the filter capacitor as well as the permissible current value of the relay contacts. The resistance value of the resistor can be increased if the process of switching on the converter is slowed down.