Questions tagged [high-current]

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

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4answers
129 views

Any Hazards Associated with a High Current Conductor

For a conductor carrying a low voltage (say 12V) and high current (say >500A), are there any hazards that we should beware of? I assume it is safe to touch the uninsulated conductor even when it is ...
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1answer
74 views

Step potential (or voltage) near electric power lines

I am not familiar with these topics, and my question is related to this one: Can a high voltage line kill a person without touching it?. In school I heard about step potential, which as far as I ...
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1answer
168 views

Relay to Tesla Coil [closed]

If you take apart a Relay (small, mine is out of a printer) and open it up there is a tall coil of wire. Are you able to use that coil of wire to make a HV generator or Tesla coil of a sort?
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3answers
219 views

Driving a 5A current through a coil

To many electronics engineers this might seem a stupid question but I was given by my boss the task to find a solution to drive approx. 5A through a coil. The coil's resistance (not considering ...
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1answer
70 views

How to cut of the DC supply from a high power motor control?

For my project I built a BLDC motor controller. Now I have to cut of the controller from the battery. A relay is not easy because common my application needs >200Amps The highside switches I ...
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2answers
217 views

LED strip power supply requirements

There are a few questions on here that talk about LED power supplies and how to calculate their ratings but none address the issue that my 5meter long 5v addressable LED strip of 18watts power ...
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2answers
916 views

High current DC motor driver mosfet

I am developing an high current dc motor driver, and I'm looking for mosfets that can dissipate enough power without heating too much thus without using heatsink. I saw this project : http://navrobot....
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4answers
8k views

Controlling high current (1000A) with MOSFETs

I am currently designing a capacitive discharge spot welder and am running into the issue of switching. I plan to use a few super capacitors in series to discharge around 1000A in a very short ...
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0answers
327 views

Connecting a 5V 10A 2.1mm x 5.5mm Power Supply to a PCB

I have designed a system to control LED light strips (Adafruit NeoPixel strips) using an Arduino from a C# program in Windows. I have been through the prototyping phase with a breadboard and a single ...
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1answer
46 views

PSU for Ampacity test of connection

i have this problem. I have to validate with a test that my connection on my power board can carry the nominal current required by the specs. For current around 10A the setup I'm using is a ...
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1answer
95 views

Can I power a device with a power supply that has a higher current rating? [duplicate]

I have a device with an input rating of 23 to 56V DC with a maximum current of 0.5 amperes. Is it possible to supply this device with a power supply with an output rating of 48V DC with 1.0 ampere?
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5answers
4k views

Automotive ground shift phenomenon

I'm working on the integration of a sensor into an automotive platform, using a standard 12v negative chassis setup. I am trying to understand a somewhat mythical phenomenon that is experienced known ...
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2answers
438 views

Suggestions on how to control a 1000W DC motor

I would like to find out the best solution to safely control two 1000W DC brushed motors by using a atmega328p. In particular, the DC motors are rated: 1000W, 50A, 24V, 2400 RPM. I have a radio ...
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0answers
513 views

Can i charge fully discharged lead acid battery with little high volatage?

I have a 6v lead acid battery it is fully discharged from 6 months and shows the voltage 5.3 V(3 cell). I have wall power adapter of 12v. When i directly try to charge current reached to 1.8A and ...
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1answer
392 views

How to Control High Voltage/Current like A/C air conditioner with Arduino?

I need to On/Off an air conditioner with arduino. I think Relays are not suitable to handling an A/C. So experts please help me.
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0answers
220 views

3kW power supply from 230Vac input

What kind of power supply topology(s) should you use for a CC and CV programmable power supply with the following parameters? input: 230Vac output: 0 - 1000Vdc / 3A max.
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1answer
191 views

What could be used to create oscillations of sine waves with 200 Amps peak at 50 MHz? [closed]

And I have no idea how would that much AC affect the nearby environment.
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1answer
80 views

Adjustable over voltage protection

I want to build an over voltage protection with adjustable voltage limiter. Operation range would be 5-12 volts. The protector would be "self recovery" - it will reset if voltage again goes under ...
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1answer
139 views

Why is the current in the resonant load in my H-bridge only sinusoidal for low current amplitudes?

I am attempting to drive high-current (~1000 amps) at high frequency (10~30 kHz) through a coil. I am not an electrical engineer but a student working in a small lab where we have to build everything ...
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1answer
120 views

High power 12v regulator

Hi i am new to the forum and this is my first question so fell free to help me with formatting. I am working on a project that involves controlling RGB LED strips from a Arduino. I have as my power ...
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1answer
1k views

How to chose the right voltage and coil(s) for coilgun?

Coilgun is a simple canon which attracts piece of metal into the core of the coil and then, when the piece of metal reaches midpoint of the coil, removes the power and leaves metal at it's accelerated ...
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2answers
172 views

Best approach/practice to design PCB which can handle 50-80A current?

I'm designing a PCB which needs to handle high currents across various fuses, relays and connectors. The current ratings would be 8A, 20A, 50A, 80A. So I would like to know which is best approach to ...
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2answers
685 views

Correlation between saturation of high current (power) transformer core and load

In an experiment I need high (\$>600A_{max}\$ or \$1200A_{pp}\$) AC currents in a range from 400Hz to 4kHz. The load is simply a short circuit. For this purpose i use a class D audio amplifier and ...
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2answers
276 views

Splitting DC Supply Rail with High Output Currents

I'm currently working on a audio amplifier circuit that requires split supply rails. I have a wall converter that can supply 19V, and I ideally want to be able to create a ± 12V supply rail out of the ...
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1answer
363 views

PCB design issues for handling 50A current

I am working on a combiner circuit that will monitor the current and voltage rating of my device. The device and the combiner must handle 50A Current. Im using a shunt on my combiner PCB to measure ...
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1answer
927 views

Use Arc Welder as High Current PSU

I have a dc arc welder that can give about 50v 20 - 120 amp output. My question is can i use it as high current psu for example using it for ZVS driver or induction heater that need high current? ...
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3answers
2k views

High current, low voltage switch

I have a serious hobby coilgun project powered by a 6S (25V) LiPo Battery. Currently i have the LiPo, capable of at least 600A burst current connected to a ~75mOhm circuit for some 300+A of peak ...
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3answers
86 views

How to modify the current of a battery both higher and lower [closed]

From what I've come to understand, a higher voltage source leads to a higher current from source to the destination. Example: On a 1.5V battery let's say I'm getting 50mA load from my device rated ...
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1answer
340 views

High Current Power Supply Schematic

I need to build a power supply that delivers high currents of 2500 Amps or greater. A common circuit design that has been used to deliver this high current is shown below. This circuit design works ...
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3answers
1k views

How to choose trace width for very high current PCB?

I am currently designing a PCB layout for my team's high current, high voltage project and am having trouble with choosing my trace width. The circuit is composed of 12 inductors placed in series ...
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1answer
247 views

High-current capable (±250A) AC power-supply, sine wave/square wave (±20V)

I hope you will find patience to read my beginner question. I need to do some test on a diode using a simple setup: AC power supply + load + diode. The problem is that I must generate a sinusoidal or ...
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2answers
543 views

High current draw at start up of DC motor. How to understand if the battery can withstand it?

Suppose I have a solar powered plant like this one below: simulate this circuit – Schematic created using CircuitLab The solar panel charges the batteries and, when needed, the power is drawn ...
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1answer
320 views

Large current for a short amount of time [closed]

I need some help with design a circuit that could store charge and pump out 16 amps to a 1.5 ohm load for 3 seconds when discharge. The load is basically two resistors in parallel, each branch with 3 ...
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9answers
8k views

Dangers of capacitors blowing up

I was wondering what kind of damage a 350V, 6000uF (link to capacitor) electrolytic capacitor could do. will this kill me if it blew up next to me? I have never blown capacitors before, but I ...
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2answers
6k views

LC Filter for a Full Wave Bridge Rectifier?

According to what I've read on a few websites and PDFs (http://www.irjes.com/Papers/vol2-issue6/Version-1/E02064249.pdf is an example) using an inductor-capacitor filter to assist AC to DC ...
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3answers
252 views

decrease 32V 3A DC voltage to 28V 3A

I am now building a power supply for a 100W LED light. Right now I already got 32V DC from my DIY Power Supply, with 3A current. I try to enable my PS to dim the light by regulate the voltage to the ...
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1answer
642 views

Working with peak current of mosfet

In the datasheet, the transistor has two max current values, in the case of the IRF510 Continuous Drain Current = 5.6A Pulsed Drain Current a IDM = 20A with a ...
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0answers
227 views

Can an IGBT overcurrent damage the driver?

We are using an hex IGBT module (datasheet: http://www.microsemi.com/document-portal/doc_view/7751-aptgt150ta60pg-rev2-pdf) which is driven by two separate IGBT drivers, the 2SC0108T2D0-07 (datasheet ...
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4answers
188 views

Extremely high current power source(s)?

Out of curiosity, is it possible to have a current source generating extremely high current? In the magnitude of 100kA? With low voltage output since the resistance would be 0.1 micro-ohms. It's very ...
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3answers
5k views

How many MOSFETs can we safely parallel in condition of very high currents? I had problems with a motor application at 48V 1600A

I tried with some configurations in which 16+16 MOSfets of 240A each (really they are case limited to 80-90A because of source terminal, but i doubled this termminal with a very thick copper wire for ...
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5answers
1k views

High peak current supply circuit

I need to design a "peak" power current supply circuit for my load. Power specifications of load are below; Continuous power consumption: 12 V 5 Amperes DC. Peak power consumption: 12 V 10 Amperes DC....
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2answers
573 views

Tactics for Controlling Heat in a High Current Bridge Rectifier?

I'm having trouble controlling the heat from running a bridge rectifier (Similar to http://www.amazon.com/1200V-Single-Bridge-Rectifier--QL100A1200V/dp/B00EZ8BUMU/ref=sr_1_2?ie=UTF8&qid=1459556648&...
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2answers
260 views

High-current capable, high precision sine wave

I'm actually asking 2 questions - one about sine wave generation and another about high rate / precision voltage measurement. I'm working on a project where we have to generate a sine wave on top of ...
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1answer
2k views

LM338 with pass transistors

Looking for formulas for figuring out R1,R9,R10. The transistors and regulator is what I have on-hand. Any help would be appreciated.
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1answer
1k views

How to add frequency control feedback loop to a circuit for an inductive heater

I am interested in a design made by an MIT student, Bayley Wang, several years ago for a 30kVA induction heater. One engineer on this site with professional expertise examined this circuit and ...
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1answer
323 views

Drawing current [duplicate]

I read some where that an electronic device will only draw the required current for its operation but i dout a device working at 5 volt 500 mah will burn at 5 volt 3 amp source is this true or will it ...
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1answer
702 views

High Current Power Supply Design [closed]

I'm looking to design a high current low voltage power supply that goes beyond my limited circuit knowledge. I have plenty of experience putting circuits together, but not so much on the design side. ...
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3answers
240 views

High current voltage reference from a small current constant reference and regulator

Say I need a high current voltage reference. A very accurate and low noise part is available, but can only supply 10mA and happens to be expensive. So multiples of this part cannot be used. What if we ...
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2answers
141 views

How can you cheaply make an output pin source/sink about 5 amps of 5vDC, 12vDC, 24vDC, and 120vAC selectively?

I'm working on a project and need to make I/O pins that are configurable to offer around 4 Amps or more of each voltage: 5vDC, 12vDC, 24vDC, and 120vAC. The pins need to be able to source and sink ...
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2answers
304 views

How much power (amps) through 5.5mmx2.1mm power jack? Through a DC switch?

I am in the process of building a DSLR cooler (I use it for astrophotography) using a couple of TEC1-12703s (12V 3.3A) or TEC1-12704s (12V 4A). The ultimate idea is to run the TEC's at a higher power ...