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Questions tagged [high-current]

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

-3
votes
1answer
92 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?
11
votes
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 ...
0
votes
2answers
427 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 ...
0
votes
0answers
493 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 ...
-1
votes
1answer
389 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.
0
votes
0answers
215 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.
-10
votes
1answer
183 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.
-2
votes
1answer
78 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 ...
1
vote
1answer
135 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 ...
0
votes
1answer
119 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 ...
0
votes
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 ...
0
votes
2answers
163 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 ...
0
votes
2answers
661 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 ...
0
votes
2answers
256 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 ...
0
votes
1answer
338 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 ...
-1
votes
1answer
868 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? ...
1
vote
3answers
1k 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 ...
-1
votes
3answers
84 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 ...
0
votes
1answer
327 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 ...
2
votes
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 ...
0
votes
1answer
238 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 ...
1
vote
2answers
525 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 ...
-5
votes
1answer
310 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 ...
0
votes
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 ...
1
vote
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 ...
0
votes
3answers
250 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 ...
2
votes
1answer
622 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 ...
0
votes
0answers
210 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 ...
0
votes
4answers
181 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 ...
16
votes
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 ...
0
votes
5answers
923 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....
1
vote
2answers
551 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&...
0
votes
2answers
257 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 ...
0
votes
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.
2
votes
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 ...
-2
votes
1answer
303 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 ...
0
votes
1answer
681 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. ...
-2
votes
3answers
237 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 ...
1
vote
2answers
140 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 ...
1
vote
2answers
281 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 ...
1
vote
1answer
1k views

Buck boost converter - High current 15A@12VDC +

I don't have much experiences from designing and understanding more complex circuits. I only have basic knowledge how different components work and how to create and calculate simple transistor ...
0
votes
1answer
109 views

Alternative circuit for obsolete product [closed]

i am looking alternative circuit or module the same as DTL35A-LC. It is a analog/voltage-controlled current sink module. Its output can reach up to 5 Amps that i really need. So can you suggest a ...
2
votes
2answers
359 views

Ideal voltage regulator for power amplifiers

I'm working on a dual rail power supply that will provide DC current for 4 power amplifiers. Two of them require 20V and the other two 25 - 50V. All 4 draw a maximum of 2.5A of current, hence my ...
1
vote
2answers
957 views

12V to 6V Regulator at high current

I am currently working on a project when I need to step down 12V to 6V. This 6V will serve 3 motors. The motors pull 4 amps, 1.5 amps, and 1 amp when they are each at full power. I am having trouble ...
0
votes
1answer
642 views

Turning a PMOS Common Source into a Voltage Follower

So I have this PMOS Common Source. I thought I'd make it a Voltage Follower by simply pulling it down to ground. But when SPICE-ing, whatever value the pull down resistor I give, it just won't work as ...
0
votes
2answers
492 views

Inrush current limiter 230V AC 16A (~325V DC 3,6kW ) - low power losses - safe

I need an Inrush-Current limiter and struggling with a good starting point. Basically I was thinking about using a NTC which then get short-circuited by a relais after a short period of time to ...
-2
votes
4answers
4k views

300 Volt / 2 A - DC Power Supply

I want to design a 300 volt DC / 2 Ampere power supply, for a high-power amplifier circuit. The input can be either 220 volt AC, or 18 volt DC; both of them are available, however, 220 volt AC is ...
1
vote
1answer
1k views

Motors and H-bridge - High current on PCB

I want to control a motor by using H-bridge on PCB. I am using IRF4905 and IRF3205 MOSFETS (P and N, respectively), and some 4N27 Optocouplers. The motor takes about 70 amps How can I make my ...
0
votes
3answers
423 views

Using two batteries to increase current sourcing capacity

I'm working on a project where I am planning to use two 5V USB Power Banks because one cannot supply sufficient current. These Power Banks are 20,000mAh each and have built in circuits to regulate ...
0
votes
2answers
438 views

A little device to control current flows

I would like to have some advice for constructing a little device. The main purpose is to be able to connect 2 Li-Po batteries in parallel and discharge them in the same fashion throughout the ...