Calculating Current from DC to AC - All About Circuits
Oct 31, 2011 · It can't be as simple as just adding the currents of the DC supplies (1+2.1=3.1A), or can it? Is there a square root of 3 calculation in there somewhere? I understand Kirchhoff's current law states that current in has to equal current out, but I've never actually done a hand calculation from DC to AC before for calculating current.
AC vs DC wire derating for current | All About Circuits
Oct 28, 2020 · In the old days, upping the voltage for longer distances was easy with a transformer. It's difficult to change 1000VDC to 10,000V DC. A 10 MW Solar array field will have a high voltage DC bus. The inverters can locally adjust the power factor which is something you don;t get with AC. High voltage DC transmission lines to exist.
Calculating Inductance at DC - All About Circuits
Apr 4, 2012. #11. Inductors still have inductance at DC. The reactance formula 2*pi*f*L is for AC analysis, and it may be better to used the differential equation V = L di/dt to describe it's action with DC signals. Consider a simple buck regulator:
LED in rush current - All About Circuits
Jan 23, 2024 · Joined Oct 21, 2019. 6,814. Jan 24, 2024. #10. The LED Inrush Current article is rubbish. They say when three 3V LED are in series and are powered directly from 12V then the inrush current is "9V x 12V= 108mA". Actually, the current will be the maximum amount the 12V power supply can produce and will explode the LEDs.
How to calculate timing for Constant Current capacitor charging?
Feb 9, 2019 · At some point we are introduced to Time Constants in our electronics education in charging a capacitor through a resistor. Which equals: 1TC=RxC. It is fundamental to all RC circuits. The 555 IC uses 1/3 Vcc to .67Vcc as its unit for timing, which works out to approx .69 TC. This is where the number .7 comes from in it timing formula.
How to calculate the input current through my buck converter?
Dec 20, 2018 · Is your load steady? Scope the input and use caps to smooth it out as much as possible. Put a small resistor in series, maybe a 1/4 ohm and measure the voltage across the resistor. Use that to calculate the current. If the voltage is not smooth then you can use an averaging meter to get the average current, and use a scope to get the peak current.
How to pick the right NTC thermistor for dc-dc converter inrush …
Jul 12, 2023 · The output of the high power dc-dc converter is regulated at 65V through it's CV. In addition, it's output current it's regulated at 22mA through it's CC, as well. The maximum output load connected to the high power dc-dc boost converter is about 12k ohms, through a pot, and the minimum output load connected to it is about 2k ohms.
AC to DC amperage safety rating conversion. | All About Circuits
Mar 23, 2009 · 120v (AC) * 10A = 1200W therefore, 1200W = 12v (DC) * 100A. Meaning, what is meant for 120v @ 10A AC will handle 12v @ 100 Amps DC. This is entirely wrong. Switch contacts are rated by the current that they can "break". AC is easier to break because the voltage goes to zero every half-cycle, so it automatically extinguishes the arcing current ...
Limiting inrush current of DC Motor | All About Circuits
4,114. Aug 27, 2022. #3. I think you may be misunderstanding the meaning - the 5.6A starting current isn't inrush in the sense of a transformer etc. Its the maximum torque it can overcome from stationary and needs 5.6A to do so. If your inertial load is much smaller it …
Ametherm's Inrush Current Calculation | All About Circuits
Jul 12, 2023 · The output of the high power dc-dc converter is regulated at 65V through it's CV. In addition, it's output current it's regulated at 22mA through it's CC, as well. The maximum output load connected to the high power dc-dc boost converter is about 12k ohms ,through a pot, and the minimum output load connected to it is about 2k ohms.