Measurement of inductance by digital processing by F. C. Karonis Download PDF EPUB FB2
The measurement Fig. Processing measure data self-inductance with DC offset. This measuring example is done to an off the shelf switched power supply inductor which is specified as µH, A.
The measure frequency is 10 kHz. As noted earlier, the. Inductance is only a momentary thing. Exactly how much of a momentary thing depends on the amount of inductance an inductor has. Inductance is measured in units called henrys. The definition of one henry is simple: One henry is the amount of inductance necessary to induce one volt when the current in coil changes at [ ].
measurement resolution, proper conversion and calibration of inductance-to-digital converter output into usable data, and temperature compensation. Component Selection Inductance-to-Digital Converter The LDC is an Measurement of inductance by digital processing book Converter that simultaneously measures the impedance and resonant frequency of an LC resonator.
This updated edition provides new coverage of the latest developments in measurement technologies, including smart sensors, intelligent instruments, microsensors, digital recorders, displays, and interfaces, also featuring chapters on data acquisition and signal processing with LabVIEW from Dr.
Reza Langari. 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. Units,Dimensions and StandardsMKS and rationalised MKSA system, SI units, Standards of EMF, Resistance, Capacitance and inductance, Systematic errors.
General Theory of Analog Measuring Instruments Operating torque, Damping and controlling torque, T/W ratio, Pointers and scales. Principles of operation of various types of electro mechanical indicating/registering instruments viz.
PMMC. As a rough guide a good estimate for lead inductance is around 10 nH per cm of lead. For the best measurements kep the leads as short as possible. Measure at operational frequency: When making measurements using an LCR meter it helps to use a test frequency as close to the actual operational frequency as possible.
This means that the effects of. The connection of the measuring signal to the amplifier The analogue filtering of the signals References 5. Digital Processing of the Measurement Signals Analogue -to -Digital Converters Sampling, quantization and coding of signals Analogue-to-digital converters ADC You can use series or parallel resonance depending on what impedance you choose at resonance and what Q you expect from either mode.
Here kHz is ~ ohms and Q of 30 dB implies ohm for DCR. This can be limited by your driver GBW product. ohm (1+f) / GBW = R out unless current limited.
Here I chose 10 nF film due to a very low I needed to buffer with output impedance. Equation (4) is the general equation for balance of the AC bridge. It can be stated from this equation that the product of impedances of one pair of opposite arms must be equal to the product of the impedances of the other pair of opposite arms, the impedances expressed in the complex notation.
Applicable References for Inductance Measurement: ANSI/EASA AR, Recommended Practice for the Repair of Rotating Electrical Apparatus. IEEE Std TM, (withdrawn) IEEE Standard Test Code for Resistance Measurement.
IEEE Std TM, IEEE Recommended Practice for Testing Electronics Transformers and Inductors. To address the problem of temperature drift, this paper presents an analog-digital mixed measurement method based on the two-dimensional look-up table.
The inductance and resistance components can be separated by processing the measurement data, thus reducing temperature drift and generating quantitative outputs. voltmeter, Digital Frequency meter: Block diagram, principle of operation TEXT BOOKS .
A Course in Elec. & Electronics Measurements & Instrumentation: A K. Sawhney . Modern Electronic Instrumentation and Measurement Techniques: Helfrick & Cooper .
Electrical Measurement and Measuring Instruments - Golding & Waddis. Alternating current bridge methods: For the measurement of inductance, capacitance, and effective resistance at low and telephonic frequencies: a advanced students (The Specialists' series) [Hague, B] on *FREE* shipping on qualifying offers.
Alternating current bridge methods: For the measurement of inductance, capacitance, and effective resistance at low and telephonic Author: B Hague. 6th IFAC Symposium on Mechatronic Systems The International Federation of Automatic Control AprilHangzhou, China Inductance Measurement of the Switched Reluctance Motor with the Current Traversal Response for Exciting Voltage Pulse SHAO Da1aÈGONG Liang1bÈLI Bing-chu1cÈLIU Cheng-liang1d 1 ÄSchool of Mechanical Engineering Shanghai Jiao Tong.
Digital Instrument Basics 7. Digital Voltmeters, Multimeters, and Frequency Meters 8. Low, High, and Precise Resistance Measurements 9. Inductance and Capacitance Measurements Classical AC Bridge Methods Analog Oscilloscopes Special Oscilloscopes Signal Generators Instrument Calibration A History of Impedance Measurements by Henry P.
Hall Preface 2 Scope 2 Acknowledgements 2 Part I. The Early Experimenters 3 Earliest Measurements, Dc Resistance 3 Dc to Ac, Capacitance and Inductance Measurements 6.
Now if the current through the coil gets changed, the magnetic flux produced by it will also get changed at the same rate. As the flux already surrounds the coil, this changing flux obviously links the coil.
Now according to Faraday’s law of electromagnetic induction, if changing flux links with a coil, there would be an induced emf in as per Lenz’s law, this induced emf opposes. Filter with Memory Example Inductance roll-off due to Measurement Method Agilent Product Frequency Range Auto-Balancing Bridge B LCR Meter EA C Meter EA Precision LCR Meter A Precision LCR Meter A Precision Impedance Analyzer Hz to kHz spot Hz/1 kHz/1 MHz spot.
Digital Measurement 8 Signals - Noise • Noise is a stochastic changing of current/voltage of a signal, which is caused by several affects: – Thermal noise – Atmospheric and Galactic/Cosmic noise • Impact of noise on the measurement should be minimized by appropriate design measures, e.g.
In electromagnetism and electronics, inductance is the tendency of an electrical conductor to oppose a change in the electric current flowing through it. The flow of electric current creates a magnetic field around the conductor. The field strength depends on the magnitude of the current, and follows any changes in current.
From Faraday's law of induction, any change in magnetic field through. He is currently working as a Business Technology Analyst at Deloitte Digital, Deloitte Consulting US India, Bangalore, Karnataka, India, since in the capacity of a user interface developer.
His research interests include computer-based control and measurements and adaptive filters and processing. To acts as a sanity check for my inductance meter & measurement, I have an air coil made with some 50~70 turns AWG#26 on a " PVC pipe section.
I trimmed the number of turns so that it measures about uH on the 0~uH meter range. I carefully label the inductance on it and it has served me well for many many years. The connection of an additional stray capacitance connected in parallel (by SPST analog switch controlled by digital signals sent by wires IN 1 –IN 3) to the quartz crystal for capacitive load settings, and of inductance L 1–7 in series with the quartz crystal expands the possibility of the measurement of the inductance-to-frequency.
This book explains the basic measurement techniques, instruments, and methods used in everyday practice. It covers in detail both analogue and digital instruments, measurements errors and uncertain-ty, instrument transformers, bridges, amplifiers, oscilloscopes, data acquisition, sensors, instrument controls and measurement systems.
Digital signal processing is another example in which mutual inductance is reduced by counter-winding coils. The rapid on/off emf representing 1s and 0s in a digital circuit creates a complex time-dependent magnetic field. An emf can be generated in neighboring conductors.
3 Module 3: Measurement of Parameters - Different methods of measuring low, medium andhigh resistances, measurement of inductance & capacitance with the help of AC Bridges, QMeter.
12 20 4 Module 4: Digital Measurement of Electrical Quantities-Concept of digital measurement, block diagram Study of digital voltmeter.
The difficulty in measuring inductance of larger inductors is caused by their significant interwinding capacitance. If accurate measurement of a given inductor is required, a unique K value can be determined for that inductor, thus treating its self-capacitance as a contributor to the input capacitance, Q.
Separating the inductance and resistance components reduces temperature drift [12,30]. However, the digital signal processing of digital measurement method is complicated; thus, this process requires the use of a MCU or a DSP.
While resistance is a pure measure of how much of any given gauge of wire is wound around the coil, inductance can be affected by other things. Unusual or irregular winding patterns, metal components in contact with the magnet, coil structure and other factors can all raise a pickup’s inductance above what the raw coil might read on its own.measurement, the measurement uncertainties of inductance and resistance are % and % with sam pling points per HAN et al.: INDUCT A NCE AN D .measurement circuit is highly inductive, the so called “simple application” may become rather complex.
The mathematical expressions, where U is Voltage, R is resistance, I is current, Φ is flux, L is inductance and t is the time, to describe the measurement are.