Feasibility of measurement of inductance using a digital technique by F. E. Nour

Cover of: Feasibility of measurement of inductance using a digital technique | F. E. Nour

Published by UMIST in Manchester .

Written in English

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StatementSupervised by: Williamson, A.C..
ContributionsWilliamson, A. C., Supervisor., Electrical Engineering and Electronics.
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Open LibraryOL19657036M

Download Feasibility of measurement of inductance using a digital technique

The first method describes a self-inductance and ESR measurement by using a triangle shaped current. Measuring arrangement Fig. 2: Measuring arrangement for measuring the self-inductance with a triangle current. The circuit used for this measurement is shown in figure 2.

Using this technique, the effective measurement range is about 1pF – 10uF. If you want to view the actual impedance presented to the analyser, just press the Z key and choose the polar format.

Reliable results can be obtained when the magnitude of the impedance is between about 1 and ohms. Measuring Inductance 1. Connect oscilloscope across the resonant LC circuit. Then using 9 volt battery, connect negative lead to circuit. Quickly tap and remove the positive lead to the other side of the resonant circuit.

Observe the decay ringing frequency. Calculate inductance L using frequency and known capacitor value. This technique uses the exponential current transient to determine the time constant and hence inductance of the coil.

While this method can readily provide inductance information about a circuit it does require the use of a digital storage oscilloscope or graphical multimeter. Traditionally, the parameters associated with the measurement of induction and the testing of inductors have been performed using specialized instruments.

Now, with shrinking time-to-market windows and increased pressure to lower costs, instrument manufacturers are responding with instruments such as QuadTech's model inductance analyzer.

Some Techniques for Measuring Small Mutual Inductances Institute for Basic Standards, National Bureau of Standards, Washington, D.C. (July 6, ) A method of measuring small mutual inductances is presented.

The smallest inductor measured was / Size: 6MB. A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text.

measurement, the measurement uncertainties of inductance and resistance are % and % with sam pling points per HAN et al.: INDUCT A NCE AN D R ESIST ANCE OF PULSED F IELD MAG NET BASE.

Hi there folks, I am trying to connect up a planar spiral upto a network analyser to measure the inductance at around 10MHz - 20MHz.

Is this possible and is it accurate. The predicted value of the spiral is a few hundred nanohenires. I am also trying to figure out how to connect the spiral to the network analyser, not sure what connector to use and how to.

At resonance, the voltage will peak. Since you know the resonant frequency, and the C of the tank, you can calculate the missing inductance parameter.

L= 1/(C*(2*PI*f)^2) Using Step Response to Measure Mutual Inductance. This is the easies measurement to make, but requires some complex math. We'll go through the math first. How inductance can be measured by using Maxwell's Inductance Capacitance bridge is explained.

How To Measure Inductance. By Tim Daycounter. Most multimeter will measure all electrical properties of a component with the exception of inductance, so you are left to your own devices. There are several methods which we will discuss in this tutorial article.

Method 1 - Impedance Comparison to Resistor. generator in your lab, you can use a similar technique to make multi-frequency impedance measurements with good results. This approach may also be adapted for use as an instructional lab exercise. Capacitance and Inductance Measurements Using an Oscilloscope and a Function Generator Application Note.

inductance inductance-measurement. asked Dec 6 '17 at Chris Manning. 1 1 gold badge 2 2 silver badges 9 9 bronze badges.

votes. 1answer 2k views Determining inductance using a multimeter. Newest inductance-measurement questions feed Subscribe to RSS. THOMPSON: Inductance Calculation Techniques Part II: Approximations and Handbook Methods Power Control and Intelligent Motion, Decemberwebsite http://www File Size: KB.

Decade inductance boxes are widely used in electrical laboratories for calibration of instruments that measure inductance.

The main aim of this paper is to construct a new inductance box providing a huge number of automated inductance steps, which are used in the laboratories to perform full automatic calibration of inductance meters.

Therefore, a new Cited by: 1. Filter with Memory Example Using Equationthe unit of inductance, i.e., the henry, can be defined as follows: One henry (1 H) is the inductance of a circuit in which an electromotive force of one volt (1 V) is induced, when the current in the circuit changes uniformly by one ampere (1 A) per second (1 s).File Size: KB.

Yamamoto, Brennan E., and Trimble, A. Zachary. "Investigating the Feasibility of Tuning the Natural Frequency of an Electromagnetically-Transduced Energy Harvester Using Passively-Controlled Inductance." Proceedings of the ASME Conference on Smart Materials, Adaptive Structures and Intelligent by: 1.

The expression for inductance is simple and can easily be calculated. Disadvantage: Since Maxwell Inductance Capacitance Bridge uses variable standard capacitor, it is very expensive to get variable standard capacitor.

Applicability of Maxwell Bridge: Maxwell Bridge is suitable for the measurement of inductance with medium vale of Q (1. To determine the self-inductance of an unknown coil. This bridge circuit measures an inductance by comparison with variable standard self inductance.

The connections for balance condition is shown in Fig. Circuit Diagram: [Fig 1: Circuit Diagram for Measurement of Self Inductance by Maxwell Bridge] Let. Maxwell Inductance Bridge for Measurement of Inductance Video Lecture of Measurement of Inductance Chapter in Subject Electronic Instrumentation and Measurement for Electrical, Electronics, EXTC.

some thoughts about the practical measurement of inductance for the radio amateur: abstract: a simple,classical and reproducible method for quickly and accurately indicating Q and measuring inductance in unkown coils and cores over the range of.

To determine the self-inductance of an unknown coil. Circuit Diagram: [Fig 1: Circuit Diagram for Measurement of Inductance by Owen's Bridge] This bridge may be used for measurement of an inductance in terms of capacitance. Fig. shows the connections for. In Field/ Frequency Measurement/ Inductance Open AirOpen Air (Hz) Calculated Method (mH) Open Air Calculated Grover's Formulas Open Air Measured Bridge Open Air Measured Bridge Open AirOpen Air 10Measured Bridge Open Air 5, Measured Sencore Open Air N/A Measured Step Response File Size: KB.

Inductance and Magnetic Energy Mutual Inductance Suppose two coils are placed near each other, as shown in Figure Figure Changing current in coil 1 produces changing magnetic flux in coil 2.

The first coil has N1 turns and carries a current I1 which gives rise to a magnetic field B1 G. A technique to enlarge the leakage inductance using inter-winding spacing and magnetic insets is given in [24].

The tech-nique is highly controllable and can achieve large increases in leakage inductance; however, the transformer becomes larger, heavier, and more expensive.

Sector winding, as advanced inFile Size: KB. Liu, T, Fu, C, Ozev, S & Bakkaloglu, BA built-in self-test technique for load inductance and lossless current sensing of DC-DC converters. in Proceedings - IEEE 32nd VLSI Test Symposium, VTS, Proceedings of the IEEE VLSI Test Symposium, IEEE Computer Society, IEEE 32nd VLSI Test Symposium, VTSNapa, CA, United Cited by: 5.

Transformers –Current Ratios •I s is the current through the secondary inductor •I p is the current through the primary inductor (the one connected to a power source) •N s is the number of turns in the secondary inductor •N p is the number of turns in the primary inductor •Note –Power I P V P = I S V S is conserved in an IDEAL transformer •In real transformers there is loss - heatFile Size: 1MB.

Inductance Measurement Fixture and Mathematical Model Development to Support AC Drive System Simulation Tools Garry Jean-Pierre University of Wisconsin-Milwaukee Follow this and additional works at: Part of theElectrical and Electronics Commons This Thesis is brought to you for free and open access by UWM Digital : Garry Jean-Pierre.

Inductance measurement. The measurement of self- or mutual inductance. An electrical reactance such as the angular frequency (2&pgr;f, where f is the frequency) times self- or mutual inductance is the ratio of the alternating voltage having the appropriate phase, which appears across specified terminals, to the current through the device.

Commercial instruments often. This thesis describes developmental work on a number of high voltage measuring techniques. The emphasis of the development has been on measuring techniques for high voltages and on wide band partial discharge measurements. Two methods have been developed for the measurement of highCited by: 5.

In the proposed measurement procedure, we first make an initial, low-accuracy measurement of the inductance standard under test using an LCR meter. From this measurement, suitable resistance and capacitance standards are selected that will, when connected in parallel, result in an equivalent impedance Size: KB.

Aim: Measurement of the unknown inductance byusing Maxwell bridge tus: Digitalmultimeter,Patchcords.R2=W=1MW,R3=KW,C4=1mfLX1=mHLX2=73 mHCircuit Diagram: Theory: TheMaxwell’s bridge isused an inductance is measured by. Re: Measure inductance wtih a multimeter The process described in the link posted by the OP seems obtuse.

Using the equipment you have, send a signal of frequency f though the inductor. Measure the voltage across the inductor and the current through the inductor. Divide the voltage by the current to get the impedance. mutual inductance of coil one with respect of coil two is defined as M This mutual inductance is true irrespective of the size, number of turns, relative position or orientation of the two coils.

Because of this, we can write the mutual inductance between the two coils as: M 12 = M 21 = M. Realization of an Inductance Scale Using a Sampling System 4 f s= nf, where fis the frequency of the measured signal.A total of 2mperiods of the measured signal is sampled in a sequence, half for channel 1 and half for channel 2.

using active rectifiers, a low-pass filter, and an analog-to-digital converter is given in [10]. A circuit measuring the differen-tial capacitance using a current detector and an amplitude modulation–demodulation circuit is given in [11].

This paper compares several different methods of measuring the length of open-circuited wires using. The inductance or impedance of a motor can be a key parameter during the manufacture and servicing of both AC and DC motors. The inductance of both AC and DC motors can be measured using a low.

inductance impacts these in terms of delay variations, degradation of signal integrity due to overshoots/oscillations, aggravation of signal crosstalk, and increased power grid noise. The main difficulty in the extraction and simulation of on-chip inductance is the fact that inductance is a function of a closed cur- rent loop.

This article describes a novel measuring inductance strategy on direct current (DC) machines. Measuring self-inductance and mutual-inductance in rotating machines is always a very challenging task over a few decades. A significant challenge in modeling electric machines is to obtain their variables and parameters as accurate as possible.

The method developed in this Author: Ning Chuang, Timothy J. Gale, Richard A. Langman.Abstract— Inductance box is an instrument that generates a variety of inductance values, which are used to verify the accuracy and to calibrate inductance measurement devices.

In this paper, characterization of a new fabricated inductance box has been investigated by using an automated system developed for inductance measurements. The dot indicates there is magnetic flux coupling between one or more inductors as represented in a schematic diagram.

As shown in your schematics the mutual inductance between the various inductors is indicated by the arrow(s) with an annotated value in .

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