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Questions tagged [high-current]

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Say how much current is required, high-current means different things to different people.

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I am working on an electroadhesive for a project this year, and I need to find some sources that I can cite for the safety of the high voltages involved. The high voltage converter that I was going to ...
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I am designing a buck converter for a lead acid battery with an output current of 135 A and voltage from 108 V to 142 V in different CC and CV stages. The input voltage is 165 V from a Vienna ...
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The classical current booster for LM78xx/LM317 series is the use of a BJT in this way: Source I understand the principle of how it works. However, I have a doubt: can this work with any linear ...
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I've been working on a coilgun/electromagnetic accelerator/Gauss cannon for the past few weeks, and I'm having serious trouble building a real physical circuit to test my coils. I'm charging the ...
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I am designing a relay PCB for an application rated upto 16A. The space is a constraint for me so for better connection, I used a copper pour for the line on the top layer and neutral on the bottom ...
ASY's user avatar
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If I use a trace width calculator to find out the width of copper I would need for a specified current. Now for my situation I need 120-150A of current (peak), 40 - 50A continously. I am using a 4 ...
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If I have an application that takes 50A DC continuous, then the wire that I have to use 3 or 4 AWG wire. But on a PCB it is enough to use a 1 oz / sqft 70 mm width trace/polygon plane (KiCad trace ...
Gokul Karthik's user avatar
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I have an inverter that has charger controller inside, & the designers of the whole solar system overlooked current parameters. The current from the solar panel to inbuilt charge controller is ...
nahom Abebe's user avatar
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I'm working on my first PCB that integrates both an AC source (with protective earth/PE) and a DC ground plane (GND). This board is designed for high current (up to 10A), so good layout and grounding ...
Mat Kenji's user avatar
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I'm planning to use hot melt glue to seal gaps in circuits to prevent short circuits. For example, one application where I might use it is fuse box (which might not be a good idea since cooling ...
juhist's user avatar
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2 votes
2 answers
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A specific component (hydrogen electrolyzer) requires 3.5-5V and 8-9A. D-cells drain fast and are not an efficient battery pack for this component. What are the options to deliver the specific voltage ...
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I’m working on a PCB at the moment which has a pulse generator which generates 20 V, 1 μs pulses. I need to send this pulse to many different endpoints on the board which will each pull between 20 mA ...
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I've started studying power electronics and am currently designing a 45W flyback converter with a 15V, 3A output. The input voltage can vary widely, from 20V to 120V. I'm following classical flyback ...
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I am trying to select a through-hole compatible gate driver that will control 100 SiCFETs (IMZA120R014M1H) in parallel. I am trying to determine the gate resistances as well. The total gate charge \$...
C-LEC's user avatar
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https://www.digikey.com/en/products/detail/flex-power-modules/BMR4920300-864/17830016?s=N4IgTCBcDaIEIFkBKAWAnGADAZk5g9ABwBsKIAugL5A I want to make a breakout board for this voltage converter, ideally ...
Lillian Miles's user avatar
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I'm making a circuit that rectifies ( full wave ), with a center tap transformer. Here is my design: As you can see, I want to control the sinusoidal with SCR phase control. My concerns are because ...
Alfredo Mattio's user avatar
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I'm designing a circuit that contains a switching regulator that will need to cope with a transient peak current of around 700-800 mA at startup time. I don't know how long this transient exactly ...
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I will perform a short circuit test for a high rate battery, using a contactor that can handle the high rate current (GIGAVAC - HX series) to switch the short circuit cable. At the same time, I want ...
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Let's say I want to power a load that draws 1-2A at 9v. I would like to use a small 9v battery, but of course that is nowhere near powerful enough. I can use a dc conveter to tweak the voltage and ...
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I need to create a bidirectional power switch (replacing contactors) with power mosfets in parallel. Battery pack voltage goes from 12V to 48V and the load (generic, inductive, capacitive and ...
Gigapel's user avatar
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I would like to know some more information about Hall effect sensors. My project entails measuring high current (hundreds of amperes) in an electric vehicle (EV) and using an ADC on a microcontroller ...
Sam Shabz's user avatar
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1 answer
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I am testing a sodium-ion battery (150 Ah capacity) and facing an issue with excessive heating at the terminals and contacting pins during the charging process. Details: ...
Shridhar Parmesh's user avatar
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I'm having trouble understanding what causes turn-off spikes on a pulsed power system. I think these are mainly caused by inductance in cables but I'm not completely sure. The pulse-generator I'm ...
zmcginty's user avatar
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I am trying to design an ac current source. It should output a current of 30 Arms at 50 Hz and have no more than 12 Vrms open circuit voltage. The current is fed into some device under test (DUT) and ...
EeEmDee's user avatar
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Let's assume we have a board that has some I/O pins and some communication interfaces like RS232 and analog inputs (bottom board). Now we want to add some extra functionality and we choose to expand ...
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2 votes
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I'm trying to measure the peak current of a pulse generator, I've been using a current-transformer type current probe (TEKTRONIX A621 AC) which can only measure up to 2000amps. I've also tried a few ...
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I'm getting a big voltage spike on the gate of an IGBT I'm using to switch high-current and high-voltage as shown in the images, and I wanted to ask what you all think might be causing it. I was ...
zmcginty's user avatar
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Does the short-circuit withstand time on a MOSFET refer to the amount of time the transistor is operating at I=V_source*R_ds(on)? I am trying to determine the best way to disconnect from an 800VDC ...
C-LEC's user avatar
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2 votes
1 answer
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I'm trying to model an MCU powered on batteries. The MCU will be sending data over BLE, so it will pull a large amount of current; more than the maximum discharge current of the battery. To solve this ...
Martel's user avatar
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8 votes
7 answers
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Good quality starter cables are expensive. That's a fact, no way around it. I want to keep some in my trunk for emergencies. I looked around and saw some rated for 600 A and 1200 A. Why can't I make ...
m gold's user avatar
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My custom 3D printer has got a 24V 400W heated bed. I need to power it with an external power supply as the 24V motherboard's heated bed output port can't provide ~17A. I tried by using an SSR relay: ...
Alessandro Muzzi's user avatar
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1 answer
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I’m seeking advice on the compatibility between my DC-DC converter and a 48V lithium-ion battery pack. Specifically, I’m concerned about the maximum input current ratings. Here are the relevant ...
Kaarthick Natesh's user avatar
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I am trying to stack two boards having planar interleaved windings. I intend to use a board-to-board single-pin contact, but unable to find any suitable pin headers for the purpose. Several board-to-...
Hamza Ahmad's user avatar
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I need to power a couple of aircraft type appliances (coffee makers) from a diesel engine. Aircraft standard voltage is 28VDC and each device needs 30 amps. The engine has a 24-volt/160A alternator. ...
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1 answer
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I know arc welders typically require 15-30 volts and 100-200 amperes to work. I have two microwave transformers in which I have removed the secondary winding and wound 15 turns each of heavier wire ...
Mr. Everett's user avatar
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-1 votes
2 answers
86 views

If you use a high resistivity material (either being due to small cross section of wires or poor conductivity of material), you could increase the voltage to kilovolts proportionally to the resistance,...
Fulano's user avatar
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10 votes
6 answers
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I'm currently building a small stud welder, which I'm trying to control with IRF1405 MOSFETs (rated at 55 V.) The circuit operates at 48 V and I'm controlling the current and welding time by switching ...
JustAFewMoreAmps's user avatar
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1 answer
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I have a (Victron Energy) low voltage high current fuse box, which is intended for mega fuses such as 80A, 100A, 125A. Unfortunately, the fuse box has quite large holes where the thick cables go in, ...
juhist's user avatar
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1 answer
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I am developing a robust conveyor system powered by a 12 V car battery, which requires handling significant current. Our goal is to integrate a simple yet effective drive with adjustable speed control....
Mark's user avatar
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0 answers
90 views

I have an electric longboard that can consume up to 40 Amps continuously. Here is my schematic: I have a couple questions. Do both the high side and low side MOSFETs experience the same heat ...
Trev347's user avatar
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I’m looking for a DC power supply that can do 100A at at least 24V but hopefully 60V. The main issue I have is that all the supplies I am looking at seem to have response times in ms where I need to ...
k33g0rz's user avatar
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1 vote
3 answers
456 views

Let me confess before beginning that I am not so professional or expert in this field. I am a self learned hobbyist who learns things from YouTube and applies them in the reality. Having worked with a ...
CoderBittu's user avatar
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1 answer
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I’m trying to make a DIY grow light out of LEDs but I really wanna make sure it’s safe so that I can leave it on unattended. I bought a 12v LED strip but unfortunately there doesn’t seem to be a data ...
plshelpadummy's user avatar
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I'm trying to figure out a circuit to power a robot with multiple BLDC actuators, with two 6-cell LiPo batteries and would need some advice on safety and possible power switching. Please pardon my ...
Greg's user avatar
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0 answers
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I am going to build a spot welder with 20 MOSFETs in parallel (datasheet), each one capable of delivering 550A (1.2 kA peak approx.) powered by 35 mm2 cables connected to a 60 Ah 12 V car battery. In ...
Roberto Tascioni's user avatar
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1 vote
1 answer
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I have an array of about 10x10 high-power LEDs driven by a ~200w LED driver. I want to turn on/off the whole array using 3V3 logic with a single GPIO pin on some controller. The 10x10 array consists ...
étale-cohomology's user avatar
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1 answer
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I have a project in which I need a controllable high voltage (400+ V) high current (10+ kA) pulse (from μs to ms.) Obviously FETs won't cut it because the high voltage will destroy the channel of any ...
7E10FC9A's user avatar
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I've been needing to get some welding projects done, but am reluctant to cough up $800 or more for a TIG & stick combo welder. However, I have an old simple buzz box welder (basically an oversized ...
Tempus Nomen's user avatar
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I am using a pickup truck starter motor to build a small crane-like loading arm. I want to control the direction of rotation using an H-bridge, however, when I turn on the mechanism the motor has a ...
R Ram's user avatar
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1 vote
1 answer
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I am making Vias on my PCB Design in Altium. I had query on how to relate the reference plane opening diameter and the via plating thickness on the Saturn PCB Calculator for my vias in the Altium ...
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