An inductor is a 2 terminal passive device that stores energy in a magnetic field.

learn more… | top users | synonyms

0
votes
0answers
30 views

Flash a 36V LED from 12-14V Power supply

I have a 10W 36V LED that I would like to have it flashing on a quadcopter which has a 12-14V battery. I would like to trigger the flashes using a 5V controll voltage. As I understand voltages are ...
0
votes
2answers
34 views

Good inductor parameter for GHz frequency matching chosing

I want to buy inductor and capacitor for matching circuit of antenna in about 1.6GHZ. I searched the net for some inductor for ...
1
vote
5answers
106 views

Inductor in-rush current

The inductor equation V = L(di/dt) shows that inductors will resist instantaneous changes in current. Thus, they can be used as in-rush current limiters in power ...
3
votes
2answers
215 views

Will an inductor wound using wire of 0.6438 mm (22 AWG) be close enough to 0.508 mm (25 SWG) for a neglectable difference?

Degi-Key has 25SWG as an obsolete item. While the instructions for a project say to use, "25cm length of 25SWG wire. Wrap the wire around a cylindrical object of 6mm diameter and take it out after ...
0
votes
1answer
42 views

Question on replace of Inductor Coil in a FM Transmitter

I am making a 2 Watt FM transmitter. The transmitter's inductor is somewhat like this :- The resistor is part of the transmitter circuit. I am little confused with the inductor and not sure how to ...
2
votes
2answers
65 views

What happens if a series of EM waves pass through an inductor?

An inductor takes an AC current and produces a magnetic field. An EM wave is made of an electric field, and magnetic field propagating through space, so can a series of EM waves passes through an ...
3
votes
1answer
72 views

What kind of components are these?

Parts is in red boxes. This is from a Chinese android TV box and I am searching for a replacement part. I searched around and it might be an a shielded SMD power inductor but not sure what to replace ...
3
votes
2answers
313 views

“A zener with series diode”?

So I'm still reading The Art of Electronics Third Edition. On P.39, when dealing with indicative "kick", I found this sentence: For the fastest decay with a given maximum voltage, a zener with ...
3
votes
2answers
88 views

How does this current sensor work? (with only half magnetic core)

I have been working for sometime with current sensors (current sensor goes all around the conductor to get a voltage reference corresponding to the amperage), however i just found this little device ...
0
votes
0answers
62 views

Why does 7.6Mhz signal start appearing?

I am using a reference design that modulates a 8Mhz carrier DC square wave in simple on-off keying at 10bps. I wanted to change the carrier to 125kHz. I took out the 56pF capacitor in C4 and ...
0
votes
0answers
70 views

The Art of Electronics exercise 1.19 [duplicate]

I'm reading The Art of Electronics(3rd), and I'm just stuck with exercise 1.19. Here is the question: Explain why L∝n² for an inductor consisting of a coil of n turns of wire, maintaining fixed ...
-3
votes
0answers
24 views

What effect would an inductor have on the balancing of a Lipo charger?

I checked the leads of my LiPo charger, and noticed that it ripples a bit, me immediate assumption would be to put an inductor on the leads, but thought this may have a negative effect on its ...
0
votes
1answer
65 views

Picking the right inductor

I am trying to design my first pfc, and I am looking for the right inductor, but all the datasheets I've seen so far have the inductance rated at 1kHz or 100kHz. My question is, how do i calculate the ...
0
votes
1answer
33 views

Using Common-mode choke as inductor

I am going to build a low voltage and low power Modular Multilevel Converter (MMC) for research purposes. In each phase of MMC, there are two inductors where low frequency (50 Hz) currents pass ...
2
votes
3answers
294 views

What is a clamped inductive load?

As I'm reading about switch-mode power supplies (SMPS) I keep coming across the term clamped inductive load. You'd think there would be a clear definition that would pop up as the first Google hit, ...
1
vote
2answers
51 views

What could be the reason for failure in using a single-phase full-bridge square wave inverter to drive a coil for wireless charging?

I am working on a wireless charging project that needs a three-phase inverter. I built the inverter (with flexible wiring using connectors) myself and tested it as a single-phase full bridge converter ...
0
votes
1answer
34 views

Unidentified Inductor type - opposing turn wound toroid?

This will be an odd one to describe, but from a high power APC Symmetra UPS, these inductors are used in the AC output filter (HF sine wave). There are 3 of these per AC leg, in series, with no ...
1
vote
2answers
60 views

Is it possible to repeatedly use a schottky diode at its surge current without damage

I've been working on a circuit with an inductive load and a MOSFET, but I'm having trouble finding a suitable freewheeling diode. If I choose a diode with a maximum surge current higher than the ...
0
votes
0answers
18 views

How to design a CRGO/CRNGO cored input choke for 110kW VFD of rated current 216 Amps

I am trying to learn designing of CRNO/CRGO cored input and output chokes of VFDs. I have tried various details available on the internet but still am unable to do so. Can somebody give formulae for ...
0
votes
2answers
70 views

Impedence of 90° out of phase Capacitor and Inductor in parallel

I'm curious as to what the equivalent impedance would be of these two elements. Mathematically it seems that they would have infinite impedance (meaning an open circuit), but this doesn't make any ...
3
votes
7answers
286 views

Understanding Lead in a causal system

I've gone through school and done all the work but looking back at it i still don't quite get it. The rule is current in a capacitor leads and in an inductor lags. The inductor makes perfect sense ...
1
vote
1answer
46 views

How does inductance change with presence of different directional magnetic fields?

If I design a coil driver for a certain application, I assume there is a fixed load right? It may have drive any inductance between an interval but you can not drive any coil, because the driver is ...
0
votes
1answer
85 views

Can I place my inductors in parallel to make a Flyback?

I would like to build a flyback and I've tried simulating my circuit in LTSPICE, in which I coupled a PCH-45X-824 inductor (820µH, 986mA pk) with a 744139 WE-SI inductor (1.124mH, 3A pk). It works ...
-4
votes
2answers
85 views

How can I make electricity with magnets [closed]

Please keep in mind that this is a new concept I am learn so I do apologize Using electromagnetic induction How can I make electricity with magnets? And how can I produce a powerful supply of that ...
1
vote
1answer
37 views

Multiple output flyback converter simulation in Advanced Design System

I am trying to simulate with Advanced Design System (ADS) a multiple output (one primary winding, three secondary windings) flyback converter (see the image). But I cannot find a component in ADS ...
0
votes
0answers
59 views

Circuit to measure impedance

I'm trying to make a circuit to measure impedance through a FRDM-KL25Z board. The basic idea is to use two signals to calculate the phase shift between them, and use a impedance divider to calculate ...
0
votes
1answer
74 views

A question about reactive power through a capacitor in LTspice

Before posing the question I would like to write the assumption I make for the power concept in passive circuits. As far as I know the power dissipated in an RLC circuit is the active power which is ...
2
votes
1answer
57 views

Common mode inductors with high pulsed current

I have an application where I am producing fairly high short duration pulses into a load, 50A and 100us. I am looking for a common mode inductor to help reduce my EMC emissions. Because these pulses ...
-3
votes
1answer
75 views

RLC circuit step response

In this given circuit, how can we find \$ Vc(t) \$ that is voltage on capacitor? \$ u(t) \$ is step that is 0 when \$ t<0 \$ and 1 when \$ t>0 $. I want to find \$ Vc(t) \$ by 2nd order ...
3
votes
6answers
161 views

Why is average voltage across an ideal inductor zero?

In some texts it mentions that the average voltage across an ideal inductor is always zero. How can we derive this conclusion by using: V = L (dI/dt) Why is average voltage across an ideal inductor ...
0
votes
1answer
50 views

Series-parallel RLC resistor voltage

simulate this circuit – Schematic created using CircuitLab Edit: Impedance value below has been found incorrect and would apply to a purely parallel circuit instead. Question has been answered ...
0
votes
1answer
107 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
2answers
17 views

Difference of inductor rated current based on “Inductance change” vs based “Temperature rise”?

I'm looking into an inductor datasheet(page 59) and I'm having a bit of trouble understanding the difference between the ratings. My interpretation is as follows: 1 - Rated Current based on ...
0
votes
1answer
93 views

Solving a source free series RLC circuit

How do I proceed to solve this problem. If I write a KVL equation, I get $$4 (4 Vc) +1/10^-3 integral i dt - 10=0$$ What to do next?
0
votes
0answers
35 views

Finding the current through resistor in source free parallel RLC Circuit for t>0

My solution: Since alpha >w0, so response is overdamped. Current through inductor:$$ Il(0-)=Il(0+)=6 $$Voltage across capacitor: $$Vc(0-)=Vc(0+)=0V$$ Current through resistor: $$ Ir(t)=A1e^{s1t} + ...
3
votes
2answers
45 views

LC circuit of buck converter in nRF8001 datasheet

In the datasheet of the nRF8001, they specify in the reference schematic (page 51) the LC circuit to use with the integrated DC/DC converter (see below). Why is there a small inductor L5 in series ...
8
votes
4answers
292 views

What is a flyback?

Trying to find this answer is so difficult that I can't even tell whether What is the difference between a transformer and a coupled inductor? is asking the same thing. Some reading suggests that a "...
0
votes
2answers
50 views

Inductance values over the frequency

Does inductance vary over frequency in passive components. Consider a Coax cable for example, does the inductance value change as a function of frequency, lets say from 5GHz to 100GHz, does the ...
1
vote
1answer
51 views

Inductor Value Reading

I see these values written on inductor symbols on the schematic of an RF filter/PA, what to make of these values? a) what does "4T1.5D*0.31" means? b) what does "CM" means in this expression "1uH/...
0
votes
3answers
105 views

How was this equation for finding current written?

It doesn't make any sense because at \$t\gt 0\$ the two circuits are disconnected (the left and right portion). How has \$25 i_x\over 20\$ been calculated?
1
vote
1answer
71 views

Remove the load of buck converter

I have a buck converter that is delivering 6A to a load of 3ohm load. I'm measuring the output current and stop increasing the dutty cicle when the current reach 6A, at this moment the output voltage ...
0
votes
1answer
59 views

Does the physical distance from electrolyc capacitor to inductor matter?

I am designing simple LC circuit (L=470uH, C=1000uF) for 12V / 12A (1 Ohm load): As you can see, I did do some soldering already (without too much or noob thinking). The capacitor and inductor ...
0
votes
2answers
34 views

can ct sensors share a common fixed reference point?

In a previous question, I asked how to amplify a CT sensor, essentially a small transformer that induces a voltage proportional to the current in the primary circuit. The solution has one leg attached ...
0
votes
0answers
28 views

How do I design an antenna in desired frequency with preset equivalent circuit model?

I am working on a project that an oscillator drives 1 mH inductor in 7.5 KHz. This oscillator also happens to be very efficient. However, I am constrained with inductor value. So, to make my design ...
3
votes
3answers
483 views

Power MOSFET gets hot while driving Peltier by step-down buck voltage converter

I have a TEC1-12712 Peltier element, which I am driving using Arduino microcontroller through IRFZ44N and buck step down converter (to smooth PWM). Overall, circuit consists of: 12V, 8.5A max DC ...
2
votes
1answer
60 views

Finding the resistance of a practical inductor having its reactive power

Suppose I have a simple practical inductor as such: simulate this circuit – Schematic created using CircuitLab L is known. R is unknown and we need to find it. The supply frequency (say \...
2
votes
1answer
74 views

How to select a gate driver transformer

I designed a Half-Bridge power supply using Gate Driver Transformers to drive my two MOSFETs. It's working great, I winded the two transformers around very small toroids with some turns, I didn't ...
0
votes
0answers
38 views

What are the risk of overload a inductor in buck converter?

I've a buck converter working at 100kHz simulate this circuit – Schematic created using CircuitLab So far I have tested the circuit for a 4A output current, but I may need to work with ...
2
votes
2answers
121 views

Operating an inductor beyond its rated current

Let's assume the following situation: there is a power supply which VCC line has an inductor between some capacitors, for additional filtering capabilities: simulate this circuit – ...
0
votes
1answer
48 views

Inductor waveform not increasing when supply is increased

I am building and testing the transmitter side of a wireless charger. The image below is a rough representation of what I am doing, U1 is powered by an IR2110 driver at 5kHz off a 555. V1 is 30VDC ...