Questions tagged [high-current]

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

30 questions with no upvoted or accepted answers
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275 views

Why do I get high DC current in grid tied inverter output?

Edit: Added gating signal waveforms. Changed some of the graphs, I accidentally put a test circuit waveforms the first time. Current is not that high but offset is there and current is high for a ...
2
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0answers
431 views

TDA7294 100W Audio Amplifier Causing Unexpected Problems

This is the circuit I will be referring in this question: TDA7294 is described in this data sheet. Upper IC with added external components is a well-known circuit and can be found on many websites ...
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0answers
167 views

Voltage Sucked Down on OPA541 (amplifier) Circuit Output

I am currently working on a design to generate a 5VAC (rms) @ 400Hz supply capable of 5A continuous. The design contains a non-inverting amplifier that takes a 213mV (rms) @ 400Hz voltage waveform (...
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0answers
55 views

Standards for colour of conductors of pre-assembled cables

We are designing a product for industrial energy storage systems. Multiple units are connected with pre-fabricated cable assemblies of 2-4 separate leads that are terminated in connectors unique to ...
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0answers
47 views

What capacitor to use for high voltage & high current filter application

I am designing a filter that needs a capacitor. I am not allowed to paste the schematic here, so only the maximum voltage at and current through the cap, pasted from the spice simulation: (voltage is ...
1
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0answers
79 views

Proper capacitors for ESP8266-12F?, resetting at high current peak

When using the ESP8266-12F on a PCB I designed myself it keeps resetting after a high current spike of another module (Sim800L). I ofcourse tried to solve this using capacitors but I seem to have made ...
1
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0answers
73 views

Electric heating for glass melting furnace

Some furnaces use electricity for glass melting. Low voltage and high amperage power is passed through the molten glass through 2 molybednum electrodes dipped into the glass. The molten glass acts as ...
1
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0answers
395 views

Pulsed DC, kA range inductive transient protection method

I would like to design a transient protection solution for HVDC_pulse_unit. HVDC voltage = 3500V , current > 40kA. Events: D1 flyback diode survives(50kA surge forward current). MOVs section did ...
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0answers
376 views

Soldering sheet busbars to PCB concerns

Hello fellow engineers I have decided to solder busbars to a high current pcb , but i have 2 concerns : Does soldering a flat busbar (shown in left image) could cause thermal stress and deformation ...
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0answers
165 views

Turn ON/OFF 5V 2-5A by Raspberry Pi GPIO

I need to control few 5V 2-5A devices by rpi GPIOs, which has the 3.3V logic level. I come up with a simple circuit, but I'll appreciate any ideas, corrections, suggestions. The LOAD is something like ...
1
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0answers
631 views

Oscillations in Master-Slave High Current Source

I am attempting to trouble shoot a circuit and I am a bit stumped. The circuit is high current source (10-20A) based on a master-slave configuration using OPA549 high power op-amps. There is one ...
0
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1answer
59 views

10 Amp Current Limit

I have a 28VDC, high current supply (constant voltage) that is required to charge an emergency power supply. These EPS internals are rated at 15 amps max input current, however, it’s stipulated that ...
0
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1answer
34 views

Ground separation between ADC and high current capacitor discharge circuit

I recently designed a capacitor discharge welder for my welding applications, and I come through a problem about separating grounds between AGND of the controller and (-) terminal of the big 1.3 ...
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0answers
71 views

Oscilloscope high voltage and current measurements

I have been tasked with measuring both the voltage and current output of a plasma system but have only been provided and oscilloscope to do this (Tektonix TBS 2000 Series 100MHz, 1G/s) and a high ...
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0answers
129 views

Safe Voltage/Amperage for Soldered Wires - aka When to Crimp Instead

I have found a lot of information that circles around what I'm looking for, but nothing that directly answers it. It is possible there is no right answer.     I am jealous of the Macbook ...
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2answers
57 views

Multiplexing high current connections?

Noob question here. Currently I'm using a darlington transistor array to drive about 14 IR leds. I want to be use a CD74HC4067 multiplexer to simplify and shrink things up a bit. The IR led's I'm ...
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0answers
36 views

Shorting the output of both the channels of L298N

Suppose I started with a project requiring the control of motors and ended with using L298N in my project, realizing that my motor only takes around 1.5A when on load. Now, with time I realized that ...
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0answers
105 views

How to line a Metal Melter secondary for higher safety

A Metal Melter is a kind of home-made low voltage (less than 40 volts, mine is 3v) welder (small-scale) made from a microwave oven transformer (MOT). I left the primary intact (the thicker wire, which ...
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0answers
82 views

4 Layer board with high current return path inner layer

So I am doing a layout for a 4 layer PCB 1 ounce/layer. The Chip supports up to 20A (motor controller driver). The application needs about 12 amps max ( I plan it let it go up to 17A in the event of ...
0
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1answer
76 views

MOSFET-switching between two power supplys: how to avoid transverse current?

For a hobby project I would like to switch between two power supplys. The two power supplys are two 6s LiPo batteries. If one battery is empty i want to immediatelly switch to the other battery. (the ...
0
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2answers
128 views

Seeking recommendation for capacitor to handle high pulse current

I'm seeking recommendations for an inexpensive capacitor that will handle fairly-large pulse currents. Maximum voltage is 15 Vdc applied to the capacitor and I'd like to see current pulses in the ...
0
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1answer
107 views

Power Supply for two 50V/12.5A Solenoids

I'm in the planning stages of building a custom pinball table and one of the sticking points is powering the flipper coils. They're 50V DC coils with a resistance of only 4 ohms during the stroke. ...
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0answers
77 views

20A current measurement with hall effect sensor

I am not aware of drawing more than 1A over PCB traces. We are planning to use ACS712 hall effect current sensor linked below: https://www.amazon.in/KitsGuru-KG134-ACs712-Current-Arduino/dp/...
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1answer
33 views

Current Boosting Techniques for Source Side

I'm trying to use a portable power bank (5V/2.1A) and try to supply power to my DC/DC Converter which will then be used to power something else (probably a laptop or so). However, the issue is that ...
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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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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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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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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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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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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 ...