Questions tagged [inductance-measurement]

For questions about measuring inductance. Also use the "measurement" tag unless doing so would result in too many tags.

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Looking for datasheet of Toshiba T2742 integrated circuit [closed]

I'm looking for datasheet for Toshiba T2742 Integrated circuit. IC is used in old car with tachometer sensor, probably as AFE (Analog Front End). Tachometer sensor is a inductance proximity sensor, ...
pio's user avatar
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41 views

Measure Delta wound BLDC motor inductance and resistance

I'm using a VESC motor ESC to drive several different motors. When I connect a new motor, it has the ability to detect the motor parameters, but somehow gets it wrong for some of the larger motors: ...
Jedi Engineer's user avatar
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50 views

3 phase synchronous machine with salient rotor inductances and resistances measurement

I am trying to find if the following method to determine experimentally 'natural' inductances and resistances (not synchronous, transient, subtransient etc..) of a synchronous generator is valid ...
rodv92's user avatar
  • 73
2 votes
1 answer
56 views

What types of inductor cores exhibit magnetization?

My understanding of magnetization in core memories is as follows: a bit is written to an inductor's core by magnetizing it, by applying a large current. Later, the bit is read by observing the effect ...
personal_cloud's user avatar
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1 answer
106 views

Measuring CCM Boost PFC Inductance

I have not done this measurement before, so, I would like to ask for help setting up a test to measure the boost inductance within a 3kW CCM Boost (thought I would say it again...) PFC. Some ...
RogerDodger's user avatar
1 vote
1 answer
71 views

Sense small variations in inductance in AC for a metal detector circuit

I am currently working on the design of a metal detector circuit. I am relying on the method that the coil's inductance would change when a metal is close to it (due to eddy currents.) I have tried ...
Mora's user avatar
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1 answer
125 views

Does this inductance measuring oscillator circuit work?

I'm planning to create a circuit to measure inductance by creating a stable sinusoidal oscillator out of it with a known value capacitor. Then measuring the oscillator frequency accurately with an ...
juhist's user avatar
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1 vote
0 answers
63 views

Measuring time-varying inductances

I am using a circuit based on an LC tank and Arduino that is used to measure inductances. The amplitude for the current pulse is of 40 mA, approximately the current that an Arduino pin gives at 5V. ...
Sharik_97's user avatar
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Problem with inductance meter

I'm trying to simulate a design I found for an inductance meter based on an LC tank and Arduino. To simulate this circuit, I put an amplitude for the current pulse of 40 mA, approximately the current ...
Sharik_97's user avatar
0 votes
1 answer
158 views

How can I make a 50mH inductor/coil that can stand up to 3A current to be used as a DC inductive load?

It will be used to simulate an inductive load for a DC output.
Shamooooot's user avatar
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0 answers
141 views

Measuring extremely small inductance (pH) with transient pulse response

I've made an inductor device. It has 2 terminals. It has inductance, resistance, and some parallel interwinding capacitance. I am using a Keysight B1500a semiconductor probe station, which has ...
Max W's user avatar
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1 answer
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Formula for inductance with a rectangular non-air core coil?

Does anyone have a formula for calculating the inductance for a coil wrapped around a rectangular non-air core? Seems trivial but this is the closest I've come in searching, and this is for air-core ...
Bryan Hall's user avatar
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1 answer
287 views

How can i measure a transformer primary inductance with a load on the secondary?

I have an x-ray closed transformer and I only can access to the primary terminals. I want to measure the inductance of the primary and to know how this loaded secondary influences it.
Gabriel Quiroga's user avatar
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1 answer
122 views

How to account for differences in measured DC resistance of motor winding

I have five small brushless DC motors from KDE, model# KDE2315XF-2050. The specs for this motor state that the winding resistance is 0.034 Ohms, and having conversed with KDE, they state the winding ...
mike's user avatar
  • 107
0 votes
1 answer
448 views

VK3BHR LC meter inductance measurement problem

I am making the LC meter V2 designed by VK3BHR Phil Rice. https://sites.google.com/site/vk3bhr/home/index2-html I have seen many have done this and it works fine, but in my case it is not measuring ...
Ashok Das's user avatar
3 votes
2 answers
1k views

How much might inductance change if the core is water instead of air?

I'm trying to make a water level indicator. I don’t like giant float switches. If anyhow change of inductance can be measured due to change of water level, it would be helpful. I'll buy copper coil ...
Sadat Rafi's user avatar
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10 votes
3 answers
7k views

What is Negative Inductance?

I am experimenting with a stripline square spiral inductor in Sonnet and the graph is showing both a positive and negative inductance. What does it mean to have a negative inductance? Why does it ...
KJ7LNW's user avatar
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2 answers
323 views

Measurement of Resistor Parasitics Inductance and Capacitance

I have seen people doing some measurements of parasitic capacitance and inductance of some resistors, by using a vector analyzer and analyzing the graph of S11 with respect to frequency. To get this ...
Kinka-Byo's user avatar
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1 vote
1 answer
1k views

Inductance value for ceiling/pedestal 230/240Vac single phase ac fans

I need to know how to roughly get idea about indcutance value of ceiling pedestal single phase AC fan? I want to roughly model this.
Muhammad's user avatar
14 votes
3 answers
13k views

Methods to measure inductance with high (1%) precision using standard equipment?

I am modeling the fine behavior of interacting oscillatory circuits. I have looked up a couple of methods for measuring inductance. I believe I am following the procedure faithfully, but the values I ...
KBL's user avatar
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1 vote
2 answers
1k views

Measuring Inductance

I have been looking the number of methods to measure inductance of a coil if you don't have an LCR meter available, and I have had some difficulty. I designed and built a coil and I would like to ...
Dave's user avatar
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1 vote
2 answers
6k views

How to check ferrite beads?

I faced with a problem of checking ferrite bead with parameters: The measurements for two reels of this component have difference in Resistance and inductance: Reel 1: Resistance: 170 mOhm, ...
KMM's user avatar
  • 419
1 vote
5 answers
582 views

Detect if coil is near steel piece using MCU

How to detect inductance change using MCU (lowest power methods preferred). I want to detect if the coil touches steel piece (higher inductance) and when it does not (lower inductance). Basically I ...
PSz's user avatar
  • 93
0 votes
2 answers
408 views

Air-core transformer measurement using LCR meter

Is it possible to measure the magnetizing and leakage inductances of an air-core transformer (coupled coils with no ferrite core) normally using LCR meter? I want to get the values of magnetizing ...
user139731's user avatar
3 votes
2 answers
983 views

How do I measure the Inductance

How do I measure the inductance of this air round coil attached to the antenna of a tube radio? I have read something about LC tank circuit here but im not sure how I would apply it. Would I use the ...
Chris Manning's user avatar
3 votes
1 answer
3k views

Determining inductance using a multimeter

I'm having a hard time understanding why one couldn't measure the inductance of a coil using a simple multimeter capable of measuring AC voltages and currents: simulate this circuit – Schematic ...
ccrisan's user avatar
  • 133
3 votes
1 answer
972 views

Measuring Quality Factor of an Ideal Inductor

For my lab work, I have to design a method to measure the quality factor of an ideal inductor between 1MHz to 5MHz, away from resonance frequency. We know that an ideal inductor has the form (with a ...
Cagan Selim Coban's user avatar
0 votes
1 answer
2k views

How do multimeters measure inductance?

I know that some multimeters measure capacitance by applying a constant current in a time Delta t, measuring the voltage difference before and after the current was applied, and solving I = C * (...
Vladimir Vargas's user avatar
0 votes
1 answer
251 views

Can I measure resistance of an inductor on a bridge?

I designed a circuit to have a Q-factor of 15, knowing the inductor value I rearranged the equation \$\omega_o=\frac{1}{\sqrt{LC}}\$ to give me a capacitor value for a certain resonant frequency. When ...
Maitiu's user avatar
  • 79
2 votes
2 answers
3k views

4 channel inductance meter with LM339

I'm working on project where I would like to measure inductance of 4 different springs (to measure weights) using uC - Arduino. I found out that you can do that by measuring frequency of LC circuit ...
Delphi4U's user avatar
0 votes
2 answers
700 views

0.01mh-20H, Is that a good range for an inductance meter?

Inductance meters are relatively expensive for a student to afford,so, I decided to buy ECR-T4 tester which happens to test inductors and measude their inductance. I have no idea about its accuracy ...
iMohaned's user avatar
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