Questions tagged [inductor]
An inductor is a two-terminal passive device that stores energy in a magnetic field.
2,220 questions
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What are these components, how to find an equivalent [closed]
The pinout of the components is non-standard. Help me find them. Equivalent.
N05 T with non-standard pinouts (N-E-MOS)
The classic "N_х" doesn't fit by pinouts.
Recommend a resource, similar ...
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Can a frequency difference of around 100Hz affect the value of the internal resistance of an inductor?
I used a Pasco \$\mathrm{RLC}\$ kit. I measured the internal resistance of an \$8.2\text{mH}\$ inductor with a multimeter at \$173\text{Hz}\$. When I measured it with a multimeter, it was \$5.7\$ ohms,...
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Purpose and selection of inductor for RF power amplifier that has a VCC pin (MAX2616)
I am currently building an RF amplifier PCB for around ~2.4 GHz using the MAX2616, which is a broadband RF amplifier for 40 MHz to 4000 MHz.
Looking at the datasheet, I am confused about the purpose ...
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Best Buck converter topology for high power charger?
I am designing a buck converter for a lead acid battery with an output current of 135 A and voltage from 108 V to 142 V in different CC and CV stages.
The input voltage is 165 V from a Vienna ...
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What is ripple current in an inductor?
What is a ripple current in an inductor?
What is meant by ripple current and inductor ripple current?
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Identifying inductor
I recently acquired an old VCR which does not power on. While attempting to fix it, I decided to try shorting a fuse (I thought it was broken). Long story short, the VCR’s power supply circuit started ...
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Why rotor coil (winding) of a generator doesn't short circuit
Why rotor coil (winding) of a generator doesn't short circuit after long time..
We know an inductor become short circuit when dc current supply in it for a long time.
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Flyback diode solution for inductive loads with GND loss and reverse polarity issues
I'm looking for advice on how to properly design a flyback protection circuit on the PCB for an automotive application, where the supply comes from a vehicle battery and the system must handle GND ...
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Can line reactors be used for PFC chokes in high current Vienna rectifier?
I am working on a system where a Vienna rectifier will be used as the active front-end rectifier with power factor correction (PFC).
The input current into the system, and through the inductors, are ...
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BQ25620 VSYS layout
I'm designing a board with BQ25620 and I'm trying to layout the output VSYS loop.
On the BQ25620EVM User's Guide (Page 11) I ...
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Inductor---how long can the rated current be exceeded for?
I'm planning on building a HV supply for a CRT TV capable of generating ~7.5 kV at the output. Here is a diagram of the supply:
More details (and the original diagram) can be found here.. I have made ...
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Which branches get current flow once an inductor is short circuited?
I'm currently studying RL circuits using Electric Circuits by Nilsson and Riedel. In the first section, where they discuss the natural response of a circuit after its inductor starts releasing its ...
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How is it that the inductor current doesn't immediately become zero even when there is no path for the current to flow?
This is a pretty basic question, but I thought I should get my basics clear. Suppose an ideal inductor is connected to a voltage source, through a switch. I wish to open the switch abruptly. We all ...
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Relay Voltage Transient: Releasing Coil to NC vs. GND and With vs. Without Snubber Diode
Experiment
Consider the following schematic, which tests a relay (K2) being switched by another relay (K1) controlled by a ...
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Hum noise from electro magnetic amplifier (inductor)
I have build this circuit which is taken from here: link
I'm having an hum sound regardless if the device is pointing a electrical device or not. What can cause this issue?
Here is a sample of the hum ...
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Example 7.4 from Fundamentals of Electrical Engineering (Charles K. Alexander, Matthew N. O. Sadiku)
The book already provides the answer. I'm just having trouble understanding one of its steps. Why is the current i(t)=6A that flows through the short circuit in fig 7.17a, the same as the one that ...
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How does the firing of a spark gap in a Tesla coil convert the open primary circuit to an LC oscillator?
According to my understanding, in this type of design, when the spark gap fires, the circuit closes and the primary circuit should act as an LC oscillator.
However, the ends of the primary capacitor ...
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Can energy be stored in an inductor even if the voltage across the inductor is zero?
From Hayt engineering circuital analysis 8th edition
Aren't the first two points contradicting?
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Why does the current start initially in LR circuit?
We know that at t=0 in LR circuit the current is zero as the inductor completely opposes it but what makes the first tiny current to flow if the inductor keeps on opposing it what is happening on the ...
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Why isn't inductor current remaining same in the following circuit at time t=0?
I am trying to understand inductor behaviour, specifically boosting action provided by them by means of the following circuit.
Initially switch SW2 is closed and SW1 is open.
I expect inductor ...
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Help clarify descrepancy between Transformer Design(12.1.5 Optimum Flux Density) and section 12.4 AC Inductor Design K_gfe formula
I was reading Erickson, Robert W.(Author). Fundamentals of Power Electronics book, when I came across this
However, since the same starting equation 12.13 is used, shouldn't the denominator of the ...
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744873470 coupled inductor placement
I want to use the 744873470 inductor, but I am confused about how to place it.
This is the datasheet of it.
https://www.we-online.com/components/products/datasheet/744873470.pdf
This is the footprint ...
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How to test rated operating voltage of an inductor?
I am purchasing inductors for ±200 V applications to build filters. However, most inductors do not show rated voltage. Thus, I was wondering, is there a method to test the rated operating voltage of ...
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Use of Inductor on Oscillator line
I am working with the WIFI module AP6256 and found this as a reference schematic. I am unsure what L5 and L9 inductors are used for. Can I ignore them?
Link to Datasheet: https://lcsc.com/datasheet/...
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Critical parameters for selection a replacement coil in stepdown converter
The coil selected for a step-down converter, a TDK SLF10145, has been marked as end-of-life by the manufacturer, so I'm looking to replace it for a revised PCB. Ideally with a a physically smaller ...
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Short circuit behavior for a capacitor and voltage source in series
From Alexander Sadiku's Fundamentals of Electric Circuits, Example 8.2:
My current intuition of circuits tells me that any short circuit across the terminals of a circuit element, in essence, removes ...
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How to determine maximum RF power rating of an air core impedance matching inductor at HF frequencies?
Experimenting with single-band, fixed-frequency, end-fed, half-wavelength vertical antennas in the HF frequency spectrum. These near-ground level feedpoint vertical antennas require an impedance ...
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Ferrite core calculation formula for buck circuit
I am calculating inductors for buck circuits, I found this article that is what I want, but is the formula for calculating Emin and Ecore appropriate, I asked ChatGPT and it said Ecore is wrong, I use ...
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Identify this burnt component (choke? transformer?)
This came from a ballast used to power a UV lamp used for domestic water treatment.
Two components burnt out, one was a capacitor which I identified no problem, and it was situated close to this ...
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Buck inductor design
I am designing a buck circuit from 24 V -> 60 V to 19 V (30 A). I am calculating the inductor with f = 250 kHz. I am watching a tutorial video https://www.youtube.com/watch?v=i1uzuYbb81o
Which ...
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How much inductance and turns would I need for a LC circuit for mw band?
I been trying to make a LC circuit for mw band or sw band for now I only have a 3-18 pF trimmer capacitor and this small ferrite rod.
What gauge of wire and how many turns would I need for LC circuit ...
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What is the use of "infinite" inductances in case of ideal transformers?
The main characteristic of ideal transformer, that is, the primary and secondary voltages are proportional to the turns ratio and the primary and secondary currents are inversely proportional to turns ...
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Mystery Ferrite (or Iron Core) Toroid - Need help finding the part number based on measurement and color
I have been busy building a superheterodyne reciever and while working on a bandpass filter I found these toroid cores in my miscellanious bin (I likely recieved it in a box of unwanted parts from my ...
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Buck Converter IC and inductor getting hot
I've a dodgy buck converter daughter board, on a server power supply which is acting up. I'm not sure if this converter is the source of the problem (the board is not trivial and has many logic chips/...
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Formula for Inductor Charge and PWM Duty Relationship
I am running some tests on a wye wound BLDC to understand the relationship between duty cycle and charge for a given PWM period. I am slowly linearly increasing the duty cycle off just one phase. ...
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Intuition for voltage on a capacitor in series LC circuit
I had a doubt in the following series LC circuit.
I came across this image in an answer for another Stack Exchange question.
Assuming an ideal diode, the voltage at the node on the capacitor would ...
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Design of current boost converter part 2
This is a follow up of my previous question Current boost converter and as stated in the answers the issue with the current boost converter technology is the inductor who is in series with the ...
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Hoping to get some help identifying what I think is an inductor
I was trying to plug in the daughterboard connector (USB-c power and signal board) on a GMMK keyboard (100%) and ended up ripping this inductor (I think it's an inductor) off.
PCB missing inductor:
...
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Why wouldn't two inductors provide a lag of 180 degrees? [duplicate]
This says,
When you apply a voltage to an inductor, you make a magnetic field. Henceforth, if the magnetic field varies with respect to time, there is an electric field that opposes the magnetic ...
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Inductive kickback requires a capacitor to "kick back"?
I recently watched a video where a person demonstrated the spark caused by inductive kickback. He also ran a simulation of it in Falstad.
What confuses me is the capacitor and resistor, which he says ...
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Do two inductors in series make current lag 180 degrees?
I understand that inductors make current lag voltage by 90 degrees. What if I connect two inductors in series? Would that make current lag by 180 degrees?
This question arose when I was studying the ...
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How to find current in this RL circuit?
I could easily solve for Ix and I in the inductor. Still, when the switch is opened and discharging occurs, I don't understand how I can model a differential equation to get the current in the ...
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Turns of toroidal inductor
I need to customize my inductor for 50 mH. But I am confused about the number of turns. I chose T16 ferrite core. According to the calculation, I need 174 turns, though my calculation can be wrong. ...
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Current through clamping diode in series with inductor
Source
In this circuit, the Schottky diode is used to clamp the SW node when it goes negative. From my understanding, the SW node becomes negative when the internal switch of the LT3468 opens, due to ...
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Mutual Inductance Equivalent Circuit
This question is from my school notes and it asks to find the equivalent circuit of the set-up above. Note: The dots in this circuit is not the dot convention. They just represent electrical ...
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How do you calculate the permeability inside a nonuniform solenoid?
So, I am doing an experiment that has me calculating the inductance of a solenoid. Long story short, I am trying to find the inductance using the device's physical dimensions (i.e., number of turns, ...
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Is the physical formula for an inductor always true?
I am currently doing an experiment with an RL circuit and using an oscilloscope to measure the transient voltage response across a resistor. Using a time constant and the resistance of the resistor (...
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How can current flow in an AC-inductor circuit if the source voltage is always exactly countered by the inductor's back-EMF?
I'm referring to a circuit consisting of an inductor and an AC power source. I found this post here asking the same question, but I wasn't satisfied with the answer; even though the back-EMF is ...
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Does a ground cutout underneath an inductor make a difference?
Does a ground cutout underneath an inductor significantly reduce parallel parasitic capacitance and therefore extend the bandwidth of an inductor?
The context is that I am trying to filter noise on a ...
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Input Capacitors Getting Hot in Boost Converter
Here is boost converter circuit I am using and I have a 180 kHz control signal and output voltage feedback to IC. What I am facing is C33 (C1 and C2 in actual schematics below) gets hot, even when ...
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