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

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Series inductor as discontinuity in transmission line

Dual to this question is the following circuit: simulate this circuit – Schematic created using CircuitLab An infinite transmission line (with characteristic impedance \$ Z_0 \$) ends ...
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501 views

Driving highly inductive loads destroys mosfet driver

Background I am attempting to generate some relatively high voltages (>200KV) using a system of ignition coils. This question deals with a single stage of this system which we are attempting to make ...
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34 views

Analyzing a circuit with given effective values, freshman EE

Here's the circuit: simulate this circuit – Schematic created using CircuitLab Values: Voltage shown at the volt-meter, 11V Current shown at the ammeter, 5A Current generated at the ...
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31 views

Winding a multi-tap inductor

So I need reference inductances (to be tried on different circuits). So I decided I'd make a multi-tap inductor. Now, it's gonna have different layers of winding... But, I'm not sure how to pick the ...
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38 views

Where and how do I put an inductor on a volume control

I built an stereo equalizer but I made some mistakes. As the potentiometers didn't fit on my PCB I had to put them separated and make the connections with some wires. The other mistake is that I made ...
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31 views

LT Spice and inductors parallel to AC voltage sources?

This is a circuit I designed in LT Spice. There is no transformer component in LT Spice so I specified L1 and L2 as magnetically coupled with K L1 L2 1 when I try ...
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35 views

replacement or equivalent material for toroid core inductor

hi is there any way i can replace toroid core from the circuit?. there is this circuit which requires a toroid core inductor to function. a toroid core AL=25 with 6 turns of wire. for i know i can ...
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72 views

Resistor instead of Inductor in buck regulator [closed]

In buck circuit, If I mount 0E resistor instead of inductor then what will be the problem ? And what is the use of inductor in buck regulator ? whether just for filtering ? Regards, Azlum
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15 views

Redistribution of Flux Linkage in a Loop

This is a problem of Linear Circuit Analysis. We have to find the current through the inductors in t=0+. We can note that surely a impulsive current has to happen due to KLC on the left. How can we ...
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57 views

Inductor in transformer

In an inductor, a current waveform 90° out of phase with the voltage waveform creates a condition where power is alternately absorbed and returned to the circuit by the inductor. If the inductor ...
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1answer
79 views

Where does j come from in the reactance of L and C components?

So the reactance of the inductor is jωL while that of capacitor is 1/jωC. My question is that starting from the differential equations that describe the dynamic behavior of these circuit components, ...
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78 views

Replacing a SMD inductor, alternatives?

Trying to fix a board that had a SMD inductor. it was labeled L1 on the silk and there was no marking on the part, and I have no schematics. ...or there may have been markings, but someone tried to ...
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54 views

North American standard symbol for ferrite bead?

Many of the schematics I've seen in reference schematics use an the symbol of an inductor as the symbol for a ferrite bead (makes sense). But I've also seen other variants of it as well. I don't have ...
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32 views

Inductance of toroidal-cylindrical inductor?

If the inductance of a solenoid is \$L_{\text{sol}}=\frac{\mu N^2 A}{l}\$ and the inductance of a toroid is \$L_{\text{tor}}=\frac{\mu N^2 r^2}{D}\$, is it correct to assume that the inductance of a ...
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1answer
46 views

ESD protection on a solenoid driver circuit

I have a breadboard circuit that controls some solenoid valves and am trying to move it to a PCB along with improving it for ESD and EMI. This is the circuit I have on the breadboard that I want to ...
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49 views

what is the best method for organize several identical inductors?

In a circuit with several identical inductors, like the illustrative image, as in an equalizer or filter, the best method for isolation that requires the smallest space, considering that the inductors ...
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3answers
58 views

Capacitor and inductor power factor

I need an explanation about the leading and lagging power factor at electron level. Case1: In a inductor it has the lot of free electrons are ready to move when we applied a voltage(AC or DC). If we ...
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1answer
64 views

pros and cons of replacing a passive inductor by a gyrator

I am studying the construction of some touch sensors, and I need inductances of 10mH, I know I can easily do it, and also purchase them without much difficulty, however I know that it is possible to ...
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1answer
102 views

Beginner: Inductors in Series and Parallel HELP

simulate this circuit – Schematic created using CircuitLab I am looking for help with what is probably a very basic question but I am new to electronics. The question I have is on a ...
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2answers
83 views

Regarding Ferrite Bead

What is a ferrite bead? How is it different from an inductor? How is it rated? What are its important parameters? What allows me to chose between an inductor or ferrite bead to filter out frequencies ...
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1answer
39 views

Inductors for local power supply filtering

Lets say I have a circuit which involves an OpAmp and a comparator. They're both single supply running from a noisy USB power supply. Each component has local bypass capacitors, a big and a small one ...
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1answer
26 views

How to specify coupling in Pspice CAD?

I am doing PSpice CAD by simple schematic generation(not using netlist), I need to apply coupling and for this I need Coupling Component, but I do not know how to use that in schematic, I mean in ...
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3answers
113 views

Buck converter based switching power supply?

simulate this circuit – Schematic created using CircuitLab I have designed this circuit based on a buck converter. I'm just having trouble finding out which values to plug in. I.E. C1, ...
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2answers
84 views

Why is inductor completely canceling out current?

I used this calculator to determine that my hand-turned inductor has an inductance of approx. .5 uH. simulate this circuit – Schematic created using CircuitLab When I measure this ...
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1answer
94 views

How to use common mode choke inductors? (differential vs common mode)

I have yet to undestrand exactly how to use common mode chokes inductors, according to the datasheet they have 2 operation modes like in the picture common mode and differential mode, however im ...
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54 views

CLL(Capacitor long life)capacitor filtering to reduce the current spikes

if we are using capacitor between the coomutation segments of brush dc moto then it reduces spark generation. as main function of commutation system is to reverse the current in the coil. by using ...
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1answer
43 views

Inductor for Switched regulator

I'm implementing a Step-Down Switching Voltage Regulator with Vin = 12V, Vout = 5 V 300mA and I followed the application which is in the page 13. I have no doubts in choosing all the components ...
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67 views

IF transformer color codes

Is there any standard color code available for IF transformers? Generally in most of the Japanese radio receivers I see red color slug for MW oscillator, white and yellow slugs in AM IF stage, ...
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70 views

Understanding an op-amp LC tank circuit?

This is a circuit diagram for an op-amp LC tank circuit. I understand that the LC Tank circuit will decay unless some selective outside current is added, thus the op-amp. I'm simply having an ...
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1answer
65 views

Frequency vs. Amplitude modulation in a circuit?

I'm trying to create two circuits that will eventually be added to a larger circuit in a custom PCB. A basic radio transmitter needs to hook into my computer via USB, and transmit data to a ...
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1answer
37 views

Help with basic inductor

I need some help with this basic inductor. If I have the current in that direction and those values of voltage and inductance, what is the value of $$\frac{di}{dt}$$ ? I know that: ...
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127 views

Is it possible to have voltage across an inductor without having current through it?

Example : In certain cases in transformers we do assume so having zero current in the secondary but there is still a voltage across it due to mutual flux . Also we do similar things while calculating ...
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2answers
157 views

Core saturation detector-differentiator

I am building some project that requires me to measure the saturation corrent of some homemade inductors winded on scavaged ferrite cores, so I decided to try and create a circuit that will aid me in ...
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Mutually Coupled Inductors

Hello there im working on a project in which i'm making a wireless mobile charger. Im using two mutually inductors for transferring power wirelessly i want to transfer 14V (AC) from my primary coil to ...
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68 views

Why is there an inductor in this power supply circuit for SAM3X MCU?

I am working on a senior design project and am trying to embed an ATSAM3X8E (Here is the Application Sheet PDF) micro-controller into a system my team is designing. What is the pourpose of ...
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2answers
126 views

Calculating resistance and reactance of an coil (motor winding)

I want to find out the resistance and the reactance of an motor coil. I can measure the magnitude of the current through the coil using a DMM. For example, If the voltage across the coil is 230v ac ...
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1answer
48 views

Inductor Core Loss: Volt-uS vs. Irms vs. Switcher Frequency

For DC to DC application, I see these charts often for inductors, but I don't understand what they actually mean. What does this chart mean, and how does it relate Volt-uS, Irms, & Freq? Edit: ...
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137 views

How does a transformer transmit power from the primary to the secondary?

I'm trying to get my head wrapped around transformer operation and in the process regretting the times I snoozed in my Electromagnetics class as a EE student back when I was a lad :) I'm looking for ...
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23 views

How to chose a right inductor for a matching circuit

I would like to chose an inductor to make a matching circuit. Operating frequency is 6.1 GHz. I am more concerned with self resonance frequency and Q of an inductor. An inductor with SRF > 7 GHz and ...
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36 views

a Half Rectified AC, filtered by an inductor in series

What does a Half Rectified AC, filtered by an inductor in series' Voltage will look like?? I think it would be still pretty much the same, or will it be much different than that?
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Toroidal inductors

I made some inductors with CF196T1305 ferrite cores ( http://www.cosmoferrites.com/Downloads/ProductSize/3defd392-c210-4f70-a6c6-70f5b60b1953_T1305%20_WS.pdf). According to the data sheet these ...
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1answer
84 views

Diy inductor saturation current

I have a boost converter that will convert 12V and 11A to around 20V and 6A. Since I didn't find any inductors (in my local stores) capable of such currents and frequencies and the correct inductance ...
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2answers
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Would an inductor and a wire in parallel have an equivalent inductance of 0?

Since the equation is \$\frac{L_1L_2}{L_1+L_2}\$ and one of the wires has an inductance of zero , would the \$L_{eq} = 0\$?
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1answer
64 views

USB powered Switch Mode Li-ion Charger

I want to design a Switch Mode Li-ion charger which uses 5V as input and charges a single cell Li-ion cell. I am referring this AppNote On page 4 they have given the equation to find inductor value ...
0
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1answer
55 views

Inductor for boost converter circuit

I'm using an AAT1217 for the boost converter in my circuit. The reference circuit I'm using is: The datasheet suggests several inductors: It suggests using these fairly large inductors, the ones ...
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2answers
298 views

AC Power loss of inductor in a buck converter

I have a custom piece of equipment that gives a value for AC power loss (Pac) for an inductor plugged into an internal buck converter circuit. The custom equipment has an oscilloscope which is ...
0
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1answer
46 views

Use Preformed inductor instead of coil for FM Transmitter

I want to build this transmitter: The inductor in the schematic says 0.1uh so I figured I could get some of these and use them instead of making my own like it describes in the picture. I would be ...
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144 views

Why does the MCP1650 datasheet give such a low value for the inductor in a boost converter?

I'm currently designing an SMPS around an MCP1650. In the datasheet (see page 4), the recommended value of inductor is 3.3uH. However, all the inductor size calculations I've come across (here and ...
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1answer
43 views

Stray Capacitance in my load waveform?

I have just taken this trace of my Loadwave form for PWM controlled halogen dimmer. I was wondering if anyone could identify the cause of the transients below or above zero volts for each polarity. ...
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1answer
41 views

Size of inductors in passive filters

I was reading about why we need active filters even when we have passive filters with us. I got to know that one of the main reasons for doing so, is that at lower frequencies the size of the inductor ...