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All Questions

1
vote
0answers
45 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
vote
1answer
83 views

High voltage and current

I have a DC motor that needs and works nearly 400v and 20A. I chose FDL100N50 for n-channel mosfet also IXTK40P50P for p-channel mosfet. I connect a 4n35 optocupler for output of every mosfet. Are ...
0
votes
1answer
131 views

Sizing a trace on a PCB to carry 50 amps

Currently working on a 4 layer pcb-card where I need to trace for 50 amps, any ideas how I can design it? Any tips would be appreciated. Thanks!
2
votes
1answer
153 views

How to generate a high energy electromagnetic wave? Using high voltage or high current?

I am about generating an electromagnetic wave which should be powerful enough. So I should manipulate its electric field and magnetic field simultaneously. As far as I know E amplitude depends on the ...
1
vote
1answer
128 views

Switching high voltages with MOSFET at high frequencies

I need to rectify 220V 50Hz AC power to obtain 48V DC output voltage. Up to 40A current can be drawn from the DC side. 10% ripple is acceptable on the rectified voltage. I am considering two ...
0
votes
1answer
84 views

Specifying parts for Induction Heater; how to determine current requirements at transformer? [closed]

I'm working on specifying parts for the following circuit: I intend to have a very large work coil, (like 12" diameter) so I'm expecting to need a lot of power. I'm on a tight budget, though, so ...
1
vote
0answers
391 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 ...
0
votes
2answers
90 views

Can power transformers be used with higher voltages?

I purchased a Japanese transformer for a project I’m doing. It runs on 100VAC, not 120V, something I overlooked. Doing a quick search, Japan seems to use both 50/60Hz, based on the region. It’s 30 ...
2
votes
2answers
67 views

Will a 300A HV connector fail before a 600A fuse does?

I know this is a silly question but I cannot find ant data indicated it will not. The HV connector rated at 300A @ 85C and it is a 600A fuse, I cannot find a connector with a higher current rating. ...
0
votes
1answer
81 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 ...
6
votes
1answer
249 views

Switch high voltage with triggered spark gap

I want to switch a high current/voltage pulse (up to few 10kV, <1kA) from a capacitor as supply. It needs to be cheap and I don't care about efficiency too much yet. I took a look at using ...
0
votes
2answers
122 views

High current/high voltage/high frequency measurement

I have a circuit that I'm having trouble understanding. It measures the current flowing through a conductor. The measured load is 20-100 Amps, 9kHz-34kHz, and approx. 340 volts. The main conductor ...
0
votes
1answer
92 views

Digital switch for 2000V capacitor [closed]

I want to produce a discharge of a capacitor against a test cell, as part of a study on high energy states of materials. I'm using a standard microwave oven transformer as the power supply that I ...
3
votes
1answer
180 views

High current plasma jet striking circuit

A little background: I'm a mechanical engineering graduate student with a focus in materials, so electrical engineering is not my core background. I'm conducting research on plasma surface treatment ...
0
votes
1answer
652 views

How can you calculate a railgun's exit velocity?

Having a cylindrical iron container with wall thickness of 20 cm, and a total weight of 50 tons when filled with its cargo, how would you be able to calculate its required voltage and current input in ...
0
votes
1answer
125 views

High Voltage Nodes creep-age and clearance standards for electronics?

I am trying to design with the NCV5183 with a 400V DC bus. I am trying to figure out the creepage/clearance standards i need to consider for high voltage layout and if the IC's pin to pin spacing is ...
0
votes
2answers
159 views

High Voltage & Current Circuit From Small Power Source

Is there any way that I can create a high voltage and current generator circuit from low power source such as lead acid battery? eg; 12V to 10 kV and 1A Most high voltage generator such as ZVS or ...
0
votes
1answer
72 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 ...
-2
votes
1answer
162 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?
-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.
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 ...
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
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 ...
-2
votes
1answer
306 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 ...
-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 ...
0
votes
1answer
698 views

How to detect if a high voltage fuse is blown

I have a 150A fuse on a 100A @ 400V nominal battery pack. There are 5 service relays and 2 isolation relays (one on each pole) in this battery pack. I'd like to make sure that none of these relays can ...
3
votes
2answers
4k views

Switching high current and high voltage for coilgun

I am building a multi-stage coilgun and need to be able to electrically switch 450V and over 100A somehow (virtually shorting large capacitor bank)... I've tried using IGBTs but fried them. I also ...
-4
votes
1answer
64 views

Supply high power to mp3 device [closed]

i have an old mp3 device , by wrong i supplied a high volts to it through the battery place, Now it isn't work . By guessing . Which part of it's board has affected by this high power, to replace it?...
3
votes
2answers
2k views

How do plasma lamps work? [closed]

I've been trying to understand how plasma lamps (or plasma globes, according to Wikipedia) work and why you don't die a horrible fiery death when you touch them. What I've got so far is that the ...
0
votes
1answer
875 views

Where to salvage inductors?

I need a toroidal inductor for my ZVS flyback driver. The value should be between 47uH to 200uH. It should be able to handle 6A. Where can I salvage them from?
1
vote
2answers
5k views

How much current can these diodes handle in real world?

I came across these diodes on ebay today and was very surprised! So surprised that I probably have read something wrong. So I'm asking you guys just to make sure. Can these little guys literally ...
0
votes
2answers
186 views

Slowly supplying power to a very high load

Is it possible to supply power to a very high load within a huge time range? This question particularly regards MOSFETs. I know that a MOSFET must switch fast so that a little power would develop ...
3
votes
2answers
548 views

Is it possible to switch relay above the power spec?

I am planning to use a DC drived SPST reed relay. Below I include the spec for voltage, current and power ratings. Contact Rating: 200W Carry Current: 5A Switching Current: 3A Switching Voltage: ...
4
votes
2answers
5k views

Can we remove the neutral wire?

If we have the connection shown below (star connection of the secondary part of a TX), the load per each phase is equivalent (balanced load), then the vector sum of ...
6
votes
5answers
1k views

The path of electrons in AC circuit?

I have a question regarding the AC circuit shown below. If we ignore the voltage drop caused by the long cable, I think the device will work and the circuit can be considered as a closed circuit. Now ...
2
votes
2answers
3k views

H-bridge ic for high voltage and/or current

I tend to design my circuits around H-bridges, but the problem with making them out of standard mosfets is that I always have to compare the rise times, fall times, threshold voltage, etc of my n-...