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

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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 ...
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31 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 ...
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3answers
262 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, ...
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2answers
39 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 ...
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1answer
31 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 ...
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2answers
55 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 ...
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0answers
16 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 ...
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2answers
67 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 ...
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7answers
278 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 ...
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1answer
44 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 ...
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1answer
61 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 ...
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2answers
75 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 ...
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1answer
32 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 ...
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0answers
57 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 ...
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1answer
67 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 ...
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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 ...
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1answer
74 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 ...
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6answers
150 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 ...
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1answer
48 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 ...
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1answer
87 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 ...
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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 ...
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1answer
92 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?
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33 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} + ...
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2answers
43 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 ...
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4answers
278 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 "...
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2answers
47 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 ...
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1answer
49 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/...
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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?
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1answer
69 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 ...
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1answer
58 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 ...
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2answers
32 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 ...
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0answers
27 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 ...
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3answers
440 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 ...
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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
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1answer
65 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 ...
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0answers
34 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 ...
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2answers
119 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 – ...
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1answer
47 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 ...
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1answer
63 views

Propagation Delay due to Ferrite Bead [closed]

When I pass a 33MHz 'Square Wave' through 3 ferrite beads connected in series, 742792606 (from Wurth), I see that the output wave turns 'Sine' in form. Also there is a delay as it propagates through ...
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1answer
29 views

Current in circuit with switch [closed]

Switch is open in this circuit. How do I know that current IL (inductor) is 0 and voltage(Uc) of capacitor is 0 when the switch is open(t<0)? Can someone explain me this as simple as possible.
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4answers
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I have a question about the working of an inductor..

The inductor develops magnetic field around it to store the kinetic energy of the electrons into magnetic field, but i don't have a clue why does it opposes the change of current passing through it ...
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0answers
36 views

Finding current in the inductor - Easier Integration method exist?

Based in the formula given V, $$ i = \frac {1}{L}\int_0^t Vdt +I_0$$ How would you tackle this integration without having to do integration by parts every time i try to solve this problem? Since V ...
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1answer
42 views

Default unit for inductance

I received a schematic with many inductors marked "600". These are small chip inductors for filtering spikes on audio and GPIO lines on a sound chip. The default value for the resistor is simply the ...
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0answers
33 views

Lossy inductor coil

I have the electrical homework such as the following: A voltage of 200 V is applied to a pure resistor (R), a pure capacitor, C and a lossy inductor coil, all of them connected in parallel. The ...
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2answers
71 views

unknown component in datasheet

im using xl6009 dc to dc converter , in page no 7 of datasheet the sepic inverting topology is show which generates 12 and -12v .my doubt is what component is used, is it a transformer or coupled ...
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1answer
29 views

Need help understanding the concept of “Circuit model of a discharging RL circuit”

I don't understand the statements for t<0 and t>0. Why does this happen?
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1answer
47 views

Can we determine if a filter is butterworth or chebyshev from its physical topology?

Can all analog filters be classified as Bessel, Elliptic, Butterworth or Chebyshev? Given a physical ladder topology of several stages of {L, C or LC} in {series or parallel}, is it possible to ...
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1answer
56 views

Inductor's self-resonant frequency: Do we want it to be high or low?

Inductor selection always confuses me. There is a spec for inductors as self-resonant frequency. For example, on digikey, as SR frequency of inductors increase, the price may increase or decrease. But ...
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1answer
44 views

How to know the voltages between inductors? [closed]

I've got a schematic as below, but I don't know what voltage is a output. simulate this circuit – Schematic created using CircuitLab
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1answer
49 views

Multiple Wireless charging coils (Qi) in parallel?

I am making a device that will be wireleslly charged and I decided to go for a standardized Qi transmitter/receiver. The device is a kind of bulk and I want it to have an option to get charged no ...