Questions tagged [induction]

Induction is the process by which the electrical or magnetic state of a body is influenced by the action of electrical or magnetic fields by proximity without contact between a “source” body and the influenced body.

Filter by
Sorted by
Tagged with
0 votes
1 answer
57 views

Electromagnetic induction metal detection circuit

I am trying to develop a metal detector for use in a minesweeper competition. I aim to use a coil based metal detector because it has a long range and can detect underground metals. There was a ...
0 votes
0 answers
25 views

Across which terminals is EMF induced in this circuit?

If I were to place a circuit such as this in a changing magnetic field, across which terminals would an EMF be induced? If the field were into the plane My intuition suggests across all wires lying ...
  • 135
5 votes
3 answers
447 views

Doubling the length of a solenoid doubles its inductance. Two identical solenoids in series have up to four times the inductance due to M. Why?

The inductance of a long solenoid with \$N_o\$ turns and a length \$l_o\$ is $$L_o=\pi r^2 \mu_0\frac{N_o^2}{l_o}$$ If I now make a new solenoid, \$L_{new}\$, with double the length of the original (\$...
0 votes
0 answers
43 views

Power 3 V or 5 V device only when AC device (induction plate) consumes power

I have a 5 V circuit with an Arduino using a current sensor (ZMCT103C) to monitor when an induction plate is in use, and then power on the ventilation (range hood). The 5 V circuit is powered by an AC-...
1 vote
0 answers
56 views

Toroidal coil as current sensor

Is there a simple way to estimate the amount of flux that is caught by a toroid coil (filled by some core material, like powder iron for example), which surrounds a straight wire with a current ...
  • 535
2 votes
0 answers
91 views

White residue on circuit board

What is this white powder on my induction cooker hob? Is is metal salt? The capacitor recently melted
  • 21
0 votes
0 answers
24 views

Can I rewind a 4-pole motor to be a 2-pole motor with the same design voltage? [duplicate]

I had a 4-pole motor whose winding was irreversibly damaged and I had to cut it off. I was planning on rewinding it exactly as it was (I measured everything before cutting off), but then I stopped to ...
0 votes
1 answer
46 views

Induction coil power transfer

So I'm a big fan of building models and one issue we run into is managing to run and hide wiring through the model to power the LEDs. Now I have read a little about inductive coil transfer and how it ...
-1 votes
1 answer
97 views

Why this motor shows delta 220 / star 380 which is usually the other way round from what I know? [closed]

Brand new induction motor arrived in the factory,it comes with gearbox on top controlled by VFD, but I could not understand it's nameplate, it should have shown just delta / star without voltage ...
0 votes
0 answers
23 views

Why is the waveform of torque for single phase induction motor sinusoidal in Simulink?

I want to know why the waveform of torque for a single phase induction motor is sinusoidal in Simulink.
0 votes
0 answers
25 views

What is the effect of the capacitor on the input power and torque of permanent split capacitor (PSC) single phase induction motor?

I need to know the effect of the capacitor on the input power and torque of a permanent split capacitor (PSC) single phase induction motor.
-1 votes
2 answers
205 views

Does the diameter of a coil affect the voltage it generates when a magnetic field passes it?

If two wires of equal length (let's say 1m) are wound with different diameters (3cm and 6cm) to form a coil, if equal alternating magnetic fields passes through both of them, will they generate the ...
  • 37
3 votes
3 answers
190 views

Single wire electrodynamic pickup preamplifier (transformerless ribbon mic)

I'm currently working on an experimental string musical instrument. It isn't my invention though. The source of inspiration called Dvina has an unusual pickup system. It senses the current induced in ...
  • 601
0 votes
1 answer
92 views

Induced voltage in loop around wire in home AC circuit

I have an electric patio heater that has no indication of whether it's on or off. I want to wrap a loop of wire around its power cord, the goal being to induce a current that can power an LED to tell ...
  • 103
0 votes
0 answers
26 views

Induction from latching relay at AC lines voltage

I am using an AC latching relay in my house to switch the same LED light from three or more places. Somehow the LED lamp seems to be very sensitive to parasitic voltages, because when I engage one of ...
  • 535
0 votes
2 answers
154 views

Inductive power capture from AC power cable

How much power could be captured per inch by wrapping a wire around a standard 120V power cable for each amp-hour flowing through it (or whatever reference point makes sense if it's not that)? Assume ...
  • 121
0 votes
1 answer
49 views

Temperature measurement in strong AC magnetic field

I have a coil that is continously driven with a maximum of 100A RMS of current at a frequency of 20kHz. The coil is water-cooled and I would like to directly monitor its temperature. The temperature ...
-1 votes
1 answer
38 views

Induction on the center of solenoid

Why is the magnetic induction at the middle of the solenoid greater than at the end of the solenoid? I know it's bigger, but the question is why is that?
1 vote
0 answers
84 views

Induction-heating-circuit doesn't draw any current

I've tried to build an induction-heating-circuit, but it doesn't draw any current from my adjustable transformer, no matter which voltage I give it. I planned to run it from mains-voltage (230V-50Hz). ...
0 votes
2 answers
112 views

Charging by electrostatic induction in a new way. Will it work? Instead of connection to Earth I am connecting to another conductor

I am adding the figure of a conventional setup for electrostatic induction. The drawn setup on paper is the special setup. If you don't want to read whole description then just read the summary. ...
0 votes
2 answers
115 views

Charging by electrostatic induction

In the given figure, if we connect the positively induced side of the sphere to the earthing instead of connecting it to the negatively induced side, then will the sphere get negatively charged ...
3 votes
5 answers
391 views

How does the transformer insure that the electrical power in the secondary coil is nearly the same as in the primary coil?

My question pretty much sums up everything that I want to ask. How is the electrical power in the secondary the nearly same as that in the primary coil of a transformer? Electrical power lost must be ...
-1 votes
1 answer
52 views

Induction setup is not working, need help in locating where the problem is

I have an induction setup that I have in the picture below: According to Faraday's Law, a changing magnetic field of a primary coil causes an instantaneous change in emf of the other coil. I have ...
2 votes
1 answer
87 views

Does current flow from earth connected conductor in uniform electric field?

If we place a conductor inside of uniform external electric field then opposite charges will get induced on the both sides of conductor. What if we connect two earth wire to each side, will continuous ...
0 votes
2 answers
156 views

Inductor Back EMF Direction Relative to Changing Current

I have spent a lot of time thinking about Faraday's law and common explanation as given on wikipedia does not sit well with me. I may be confused. My concern is entirely with the wording of this ...
1 vote
1 answer
67 views

What is the current induced in a wire connected to an ideal transformer using Faraday's law?

Imagine an ideal transformer interfacing an ideal current source with a ramp function \$i_1(t)=a t\$ connected to the primary winding and a resistor \$R\$ connected to the second winding. We want to ...
1 vote
0 answers
54 views

Generation of electrostatic induction

I need to generate a 500 volt electrostatic charge. How can I do this? I don't have a Van de Graaff generator. What are some practical suggestions? Basically I want to do an experiment in which I need ...
0 votes
1 answer
234 views

Asynchronous generator - Is the calculated stator current here phase current or line current?

Please see the below circuit schematic for an induction (asynchronous) generator. I have a delta connection, with a voltage = 380V, so phase voltage = line voltage = 380V Then I calculate the stator ...
  • 3
1 vote
3 answers
467 views

How to measure coupling coefficient?

I have an EE core with one winding on one outer leg and a second winding on the other outer leg. I am measuring the inductance on one winding by having the other winding open and vice versa. For the ...
2 votes
1 answer
407 views

Calculating power of induction heating of brass

I got this project to make, to anneal brass pipe edges (to be more precise, empty brass gun-shells) of diameter about 8mm. I would like to raise the temperature up to about 450-500°C in few seconds, ...
  • 778
0 votes
0 answers
214 views

Increase the power in an induction heater

I am working on an induction heater of 3 kilowatt. I want to increase the power upto 5 kilowatt. What should I do? I have built zero voltage switching type induction heater. I used a 3uf capacitor ...
2 votes
3 answers
304 views

Induced voltage in twisted pair located close to AC conductor

Anyone with MathJax-knowledge, feel free to clean up my formulas below. Thanks Hearth! Owing to certain circumstances I can't go into details to, I have to place my DC supply wires close to an AC ...
  • 9,617
0 votes
1 answer
212 views

Formula for sizing an induction suppression capacitor

I’m using a set of 12vdc wireless relays to control a 12vdc solenoid and a 120vac, 1.6 amp motor. The relay manufacturer recommends an induction suppression capacitor to protect the control ...
  • 3
-1 votes
1 answer
235 views

Simulate a double balanced coil for a metal detector on PROTEUS

I am trying to build a metal detector with double balanced coil, (the scheme source is the french magazine : L'ELECTRONIC POUR TOUS project: EN1465 Un détecteur de métaux très sensible, the magazine ...
1 vote
5 answers
578 views

Mutual Inductance Practical Explanation

I can't understand why the Mutual Inductance is measured in Henry. The self inductance of a coil is the abillity that has a coil to create a magnetic field that produses a voltage on itself so to ...
  • 123
0 votes
1 answer
116 views

Induction in transformers and maintaining constant magnetic field

According to Faraday's law the net flux in the core of a transformer will induce an EMF in both coils, and that magnetic flux generated by each induced current in the coils (on-load) will oppose any ...
  • 101
1 vote
0 answers
39 views

Solenoid Train - Best approach for magnetically guiding an object along a path?

My project is to pull an object along a path with solenoids, by cycling their on/off state. I don't know if ferrous core solenoids pulling steel would be more efficient than pulling a neodymium ...
  • 11
0 votes
0 answers
43 views

My ZVS circuit is not oscillating [duplicate]

I had made mini ZVS driver for generating plasma arcs. When is tested ZVS driver with a pair of LEDs then it worked fine, one LED lights up and switches if I connect negative wire to cathode of other ...
1 vote
0 answers
164 views

I wanted to make plasma pen. So I made mini ZVS circuit which worked but when I connected it to inductor and transformer it stopped working

I had used these components 333 ohm resistors, an led as indicator, 1uF capacitor (50V), NIKOS P75N02LDG MOSFETs,4R7 inductor, PH 4148 diodes, ccfl transformer from laptop backlight inverter board ( ...
-1 votes
1 answer
110 views

MOSFET for switching 1000 W ZVS induction heater?

I have a 48V power supply powering a 1000 W ZVS induction heater. I would like to switch the heater on and off with an Arduino. Is using a logic level MOSFET appropriate for this?
  • 1
0 votes
1 answer
101 views

Electric toothbrush: Role of spring in contact-less charging

I accidentally dropped our electric toothbrush on the floor and the bottom lid came undone. I want to fix the toothbrush and make it watertight again. I would glue the lid back on, but this is impeded ...
5 votes
2 answers
2k views

Are induction stoves considered inductive loads?

I know a washing machine and a coffee grinder are considered inductive loads so when doing math for wiring you would multiply wattage by 2x to be on the safe side. Just one plate of my inductive stove,...
0 votes
1 answer
33 views

SPIM Rated Torque

What determines the rated torque of an induction motor? Is it purely limited to max continuous current adherent to heat dissipation requirements, or is there more to it? From what I understand, motors ...
1 vote
1 answer
93 views

What causes an induction cooker to lower heat level by itself [closed]

It's more than 5 years old. It is difficult to cook in high temperature because the minus sensor appears to be activated all the time. I end up going from 1600 to 400 every time. What must be the ...
3 votes
1 answer
92 views

I need help understanding the dynamics of this oscillator [duplicate]

I'm a beginner at circuits (I'm a high school student interested in electronics), and I'm currently working on a school project about a Magnetostriction Oscillator. The circuit construction is as ...
1 vote
0 answers
34 views

Battery-less Self-charging Graphics Tablet Pens - EMI

This is a hardware related question. A lot of the new graphics tablets have self-charging, battery-less pens. I assume the charging is inductive, either off the screen surface or from an antenna ...
1 vote
1 answer
117 views

What're the differences between eddy current, current generated in electric power generator and inductive crosstalk generated between adjacent lines?

I am studying the operation of Q3D, and found the terminology mutual resistance used in Q3D. From the Help document, it describes loss due to eddy current is modeled in mutual resistance. Combined ...
0 votes
1 answer
108 views

How to determine poles?

I designed an induction generator in the Maxwell program for wind turbine, it worked. I selected 4 poles for stator and rotor and 12 slots for both. Is the number of Poles enough for 1500 rpm speed ...
1 vote
0 answers
61 views

Wireless charging with metal plate on back of phone: eddy currents wasting energy and heating up?

I just got a car mount for my phone which uses a small magnet stuck to the back of my phone. I'm not sure the material, but I'm guessing it's conductive. My concern is with wirelessly charging my ...
0 votes
2 answers
109 views

Can induction go through metal with holes?

I admit that I have already made this question in physics SE, but after a month of no answers, I realized engineering might be better suited to everyday applications. I intend to use (Qi) wireless ...

1
2 3 4 5 6