# Tagged Questions

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

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### 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 ...
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### 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 ...
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### 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 ...
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### 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 ...
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### 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 ...
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### 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 ...
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### “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 ...
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### 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 ...
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### 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 ...
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### 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 ...
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### 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 ...
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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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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 \...
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### 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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### 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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### 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 – ...