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Questions tagged [high-power]

High-power refers to voltages 1) greater than 1000 Volts AC [Vᵣₘₛ, rms…root mean square] and 2) greater than 1500 Volts DC according to standard IEC 60038 of the International Electrotechnical Commission.

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158 views

IGBT destroyed. Help me identify any potential problems

I am trying to build an inductive oven control (for temperatures up to 1500 C), that controls the temperature by turning on the the inductive oven on and off like a commercial inductive hotplate. ...
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33 views

IGBT died probably due to Inductive Load, What to do?

one of my IGBT died during its first test yesterday. I want to be able to switch an Inductive Oven (same like many modern hotplates) on and off in a specified Interval (every 3 or 4 seconds for ...
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1answer
79 views

Looking for resources for determining cable requirements for high wattage (MW) applications

I'm doing some personal research on the specifications for cables that can handle megawatt power draws. As an example, the wires needed to supply 450VAC @ 2000A (0.9MW). I'm looking for wire diameters ...
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1answer
62 views

Potentiometer is Heating [closed]

I have this light dimmer circuit, when I plug it into the AC, the dimmer works fine but I noticed that the heat in potentiometer is increasing, is there any workaround to fix this problem?
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2answers
75 views

ON/OFF strobing multiple high-power LEDs (500mA+)

Goal: I have an application requiring strobing of many (30+) individually addressable, high-power (500mA+) LEDs. Each LED sequentially will be switched ON/OFF at a rate of about 10Hz, switching from ...
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2answers
187 views

High-Power Switching using MOSFETs

For a project, I need a means of switching a high-current circuit between two inductors. The purpose is, each inductor serves as an electromagnet, and they are switched every 15s or so in order for ...
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1answer
80 views

Parallel busbars: how to orient?

As part of my research, I'm doing calculations on a hypothetical high-current (4000 A) medium-voltage (5000 V) DC power transmission system using two parallel busbars. However, I need to decide how ...
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2answers
158 views

Identification of a part on a power line's lightning arrester

I recently spotted an arrangement of wires on a lightning arrester on top of a power line. The power line is IIRC a 110 kV, 16.7 Hz, two phase line for railway systems. The lightning arrester is of ...
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0answers
68 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
658 views

Problem switching a MOSFET with arduino

I have a Problem turning a MOSFET On/Off with my Arduino. I try to controll multiple mosfets to supply a high power Device with current. Now my issue is that the mosfet does not turn on. Here is a ...
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2answers
188 views

Powering high power LEDs without resistors

I have a bunch of 3W UV LEDs which take 3.6V@0.7A each approximately. I need to power 50 of them since I need about 150W total power. My power supply is 12V, so I need to lower that down to 3.3-3.6V ...
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4answers
233 views

Running a 15HP Motor with a 30 kW VFD

We are going be buying a 15 HP motor, and using a VFD we have, currently not doing anything. While I'm told that typically, you buy a VFD for the Motor (i.e. 15 HP Motor + 15 HP VFD), we couldn't let ...
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5answers
3k views

High Voltage PWM Motor Controller - Mosfets Explode

I've searched every post for an answer to this problem. I've built a motor controller circuit as shown in this diagram. I made the diagram as accurate as possible. The diodes on the mosfets were ...
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0answers
102 views

soldering 5x5x1 high power SMD LED: anode, heatsink, cathode

I've got myself a high power SMD 850 nm LED, 650 mW radiant power. I need to use this non-stop for hours at a time. So I need to solder this to a heatsink to manage the heat. I've got 4 them, actually ...
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1answer
57 views

Relay Data Sheet question

I need help understanding what these ratings mean. This is a general purpose relay. I'm confused. The Turn on/Off voltages are these voltages that need to be provided to the relay to turn the relay ...
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1answer
581 views

How to match gate driver with Power MOSFET?

I have a HB power MOSFET , and I need to check if the driver that I choose drive the Half Bridge MOSFET by a good way Here the schematic and Specification of the driver and MOSFET ...
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2answers
625 views

10x 3w led lights to run off 12v battery

i have ten 3w leds i need to build an array to run from a 12v car battery. Led (forward voltage 3.6) (forward current 700 ma ) (Source voltage 12-13.9) Will this work and if it will what wattage ...
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1answer
101 views

How can something like a Arri 20,000 watt light bulb handle so much power?

I'm curious to know how can something like the Arri bulb or any bulb near that wattage range can handle so much power? The filaments is thicker so is that why? As regular ligh bulbs would burn around ...
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4answers
5k 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
39 views

How to make lightbulbs filament stronger? [duplicate]

If I make the tungsten filament in a lightbulbs thicker could it then handle high electricity flowing through it without burning up so fast. Also could making it thick, allow it to handle being cut ...
4
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1answer
261 views

How to efficiently power and arrange 100 multi chip LEDs in 6 different colors each color runnig off their own transistors

First time on here hope I have given sufficient information. I am trying to power 100x 5W high power multi chip LEDs and 8x 3W high power LEDs. I would like to do so off of 120v Ac house plug. The ...
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2answers
562 views

Separating high- and low-power ground-planes

I am designing a bi-directional DC-DC converter for automotive use. Therefore, there is some high-power stuff that needs to be implemented on the pcb. The overal layout is as such: My question is if ...
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3answers
625 views

What is the Best Way to Reduce High Power Three Phase Rectifier Ripple?

If a three-phase 220V AC @ 50Hz(three lines having 127V RMS voltage if measured to neutral each) mains supply is rectified with a standard 6-diode rectifier looks like this: I believe if 25 amps is ...
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2answers
489 views

Why AC induction motor is used for high power applications?

I know that in the variable voltage variable frequency you are able to keep the torque constant in various speeds , but i have also read something about them not requiring commutators but i couldn't ...
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2answers
150 views

Where can I find 1.5kWh energy, at about 5-15Wh/kg batteries that can deliver about 350kW power? (as indicated on this wikipedia article?) [closed]

I am a rookie in this field, so any kind of feedback/edit is welcome! :) I am currently trying to find supercapacitors/batteries that have following properties: Have about 1.5kWh energy, at about 5-...
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1answer
619 views

Driving a LED high current / high speed (>= 200nsec pulse width, >=10us delay)

I have a project for which I need to pulse a LED at pulse times starting at 200ns followed by a delay time typically >10us. I want to achieve high current in this pulse period to emit enough light. ...
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1answer
118 views

Controlling high voltage/current signals with a Pi function generator

YES, I understand corona, arcing, safety, and Ohm's law... I am building a high power AC/DC variable power supply: Microwave oven transformers, CW voltage multipliers, flyback transformer, variac... ...
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5answers
498 views

Non-Invasive High Power DC current measurement

For one of my projects I need to measure if there is a DC current going trough the thick power cable. The current is DC, and my method of measurement has to be non-invasive. The current going trough ...
4
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1answer
188 views

Component for switching 1000V - 100Amps condenser discharge pulse

I am miniaturizing a circuit used to generate a pulse using condensers into an inductive load. I am a little lost on what would be the best type of component to choose to start the discharge (ie. a ...
1
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1answer
109 views

Low rpm, high power calculations help

Im trying to build an electric wheelchair with mecanum wheels, and as you might know, each of its 4 wheels has to be independently powered for the chair to have holonomic motion. With my desired ...
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3answers
551 views

Transformerless BUCK SMPS for 1kV->12V

I have a challenge to push 500 Watts (15V) at 100 meters of telco telephone cable (0.088mm2, 28 AWG, 200Ohm/km, 500MOhm insulation). The only way to achieve this is by boosting the voltage up to ...
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4answers
4k views

10 Watt LED and LED Driver related question

I got a 10watt LED from Ebay but never thought that the driver and heat sinks are must-haves for this little master. When googled, I found several circuits of LED driver. But none of them are ...
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1answer
181 views

Using IR21531 as a simple 1 channel gate driver

I've bought the only gate driver I've found on the local hardware store (IR21531). I want to use it only to drive a IRF630 with a PWM 3.3V signal. How should I do the wiring? As you can see on the ...
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1answer
2k views

High power equvalient for a zener

Sometimes the power rating of a simple zener diode is not enough for some works, but their precious ability is needed. What to do? put two zeners in series? I heard that it will work in theory but ...
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1answer
385 views

High Frequency, High Power Amplification

I was wondering if anyone could give me a little information on amplifiers. What would be the best way to amplifying a small, 1v @ 1mA, very high frequency signal (3-5MHz) to a high power signal? The ...
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2answers
715 views

Designing a high-power PCB

I'm trying to build a Raspberry Pi cluster (at least 32 Pi's) and I need a convenient way to power them all. So I'd like to design a power distribution board. The distribution board will have USB ...
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2answers
1k views

Low-pass filter for high power application

I'm designing a LP filter that should be used for a load of up to 2000W. I want to filter the AC voltage that supplies a controlled heater which uses a TRIAC for control. I've tried one approach but ...
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2answers
256 views

Can I safely place a 60w between a 50w LED and a large heat sink that can dissipate 100 watts?

Today I have learned that Peltier devices can be used to generate electricity. I have a set up with a 50 watt LED which is glued to a very large heat sink that cools it without any fans (that can ...
2
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1answer
582 views

half bridge IGBT not switching high side on

I have designed a PCB with a FAN73933 half bridge driver. It is designed to drive 2 IGBTs (FGH40N60SMD) with +- 170V rails. I have attached a schematic for better understanding. The problem is I can ...
2
votes
3answers
464 views

Up to ~1000 A constant current supply 10-40 VDC

So a little background to explain the need. Occasionally we need to test starter motors (for engines) and provide enough power when the load (engine) causes the starter to pull in excess of sometimes ...
2
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1answer
350 views

General wiring questions: high power LEDs, relay and microcontroller

I think I understand the Raspbery Pi GPIO pins and most of how this diagram below works, at a high level at least. First question, it's not clear to me exactly how the middle part with the ...
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2answers
3k views

300 amp 12vdc power supply on a standard(American) wall outlet

I am building a project that will draw around 300 amps at 12vdc, for about 40-60 minutes then it will rest for a few minutes. For this projects application it will be very impractical to build a ...
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1answer
1k views

Separated powers and high power switches? Alternatives to relais?

I want to use an Arduino (5V, 0-40 milliamps) to control some switches, which in turn control a high current line (12V, 40A). But the relays which I use use too heavy coils for the Arduino to pull off....
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4answers
274 views

How is current controlled in high power applications?

When working with electronics, it is quite easy to regulate current with a resistor, potentiometer, switcher, etc. But take a simple high power application such as an electric stove. What method is ...
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2answers
221 views

Power switch 12 KV

I want to control a load which is working with 12000VDC (with low current about uA). Is there any kind of MOSFET or switch (not mechanical actually) for that to turn it on or off? Is that possible at ...
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1answer
137 views

Choosing proper heat sink for a high power relay

I'm using this Solid-State-Relay to transfer 350 Watt: Input: 45VDC x 10A Output: 10VDC x 10A The following is derived from it's data sheet: Maximum junction temperature 150 C Junction to ...