Search query: application of the self and mutual inductance in medicine

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abstract: Parasitic inductances in power semiconductor packages affect the device switching speeds. The self inductance of the source terminal has been considered to be the main factor that limits the switching speed, but mutual inductances among the three terminals also influence the speed. This paper proposes a method to measure the source self inductance and the mutual inductances in the package using time domain reflectometry (TDR) and time domain transmissometry (TDT) that reveals the limitation of the switching speed. The measurement results agreed well with those of Q3D simulation.
author_names: H Iida

Kazunori Hasegawa

Ichiro Omura
title: Mutual inductance influence to switching speed and TDR measurements for separating self and mutual inductances in the package
venue: 2019 31st International Symposium on Power Semiconductor Devices and ICs (ISPSD)
year: 2019

abstract: The general method of calculation described in this paper is applicable to the calculation of the self and mutual inductance of thin walled solenoids of general shape with parallel axes in both coaxial and non coaxial relative positions. The method is based on the solution of integral equation, the validity of which is defined in the text and additionally the physical interpretation of each section of the equation is documented. The manner of utilization of the method is demonstrated for the cases known in systems with a circular solenoid and subsequently applied to the case of two solenoids of rectangular shape in a general relative position. In these cases, a similarly detailed algorithm is compiled and the measurements are then compared with the calculation results.
author_names: Vitezslav Pankrac
title: The Algorithm for Calculation of the Self and Mutual Inductance of Thin Walled Air Coils of General Shape With Parallel Axes
venue: IEEE Transactions on Magnetics
year: 2012

abstract: The self inductance expressions given by Yu and Han (1987) for air core circular coils with rectangular cross sections, thin solenoids, and disk coils can be solved only by the numerical integration methods. We propose as an alternative a combined analytic and numeric approach. The approach brings some improvement in the calculations of self inductance of thin wall solenoids and disk coils that can be encountered in superconducting magnetic energy storage (SMES) problems. We also give a method for the calculation of mutual inductance of disk coils and of thin wall solenoids. The results are obtained in an analytical form over the complete elliptic integrals of the first and second kind and Heuman's Lambda function. It is important to mention that the kernels of these integrals are always continuous functions on intervals of integration, so singularities are avoided. The results enable one to calculate the self inductance and the mutual inductance of any thin air core coil precisely and fast. For practical applications, the results are so simple to use that we recommend them to avoid the problems of solving the singular cases.
author_names: Slobodan Babic

Cevdet Akyel
title: Improvement in calculation of the self and mutual inductance of thin wall solenoids and disk coils
year: 2000

abstract: This paper has presented an excitation circuit for self oscillating fluxgate DC current sensors with symmetrical bi excitation structures. It consists of two excitation windings, a multivibrator, an inverter, sampling resistors and an adder. The two sets of excitation currents will together produce circumferential magnetic fields in the ferromagnetic core. The strength of the magnetic field in the magnetic core is deduced according to the ampere loop law. And it is proved that the excitation current is still in line with the average current model when the mutual inductance effect has been taken into account and the circuit parameters are symmetrical. A relevant simulation for the degree of the circuit parameters' influence has also been performed to verify the results.
author_names: Yang Liu

Yuan Lin

Qinhong Lan

Dong F Wang

Ziqi Zhao

Xuesong Shang

Yipeng Hou

Huan Liu

Xu Yang
title: Excitation Circuit Design and Theoretical Model for Self Oscillating Fluxgate Current Sensors Considering Mutual Inductance Effect
venue: 2018 IEEE 13th Annual International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)
year: 2018

abstract: This paper extends a previous formula for the mutual inductance between single turn coils to include all coils in air with rectangular cross sections, without any restrictions on the dimensions (including overlapping coils) The formula is compared with a wide spectrum of examples from the literature and agreement is excellent in every case. Experimental results are presented to validate the formula for both solenoid and disk coils. The formula is relevant to coreless transformers, inductive coupling, wireless power transfer, and leakage inductance in resonant converters.
author_names: William Gerard Hurley

Maeve Duffy

Jun Xiong Zhang

Ignacio Lope

Bettina Kunz

Werner Hugo Wolfle
title: A Unified Approach to the Calculation of Self and Mutual Inductance for Coaxial Coils in Air
venue: IEEE Transactions on Power Electronics
year: 2015

abstract: The accurate estimation of the phase inductance is essential for proper machine design and efficient control strategy development. Within this paper two different analytical estimation methods for the airgap self inductance are compared and improved by introducing the airgap mutual inductance. Moreover, a more accurate new expression is proposed where the stator slotting is included. A validation has been carried out with FEM simulations in FLUX2D(r) where the new method offers 20% more accurate results than those achieved with other methods proposed in the literature.
author_names: A L Rodriguez

D J Gomez

Irma Villar

Amaia Lopez-de-Heredia

Ion Etxeberria-Otadui
title: New improved estimation method for airgap self and mutual inductance in electric machines
venue: 2013 15th European Conference on Power Electronics and Applications (EPE)
year: 2013

abstract: This paper presents a qualitative modeling for magnetization curve of self excited induction generator and effect of mutual inductance. During self excitation the variation in the value of magnetizing inductance, increases until it reaches a peak value and decreases until it attains saturated value then increasing at lower voltage and then decreasing at higher voltage as presented. The application of fuzzy clustering method and a rule processing to extract the qualitative properties curve magnetizing of self excited induction generator.
author_names: Mohamed Barara

Mohamed Akherraz

Ahmed Abbou

Mohamed Moutchou

Mohammed Larbi Elhafyani
title: Fuzzy modeling magnetizing curve of a self excited induction generator and effect of mutual inductance
venue: 2013 International Renewable and Sustainable Energy Conference (IRSEC)
year: 2013

abstract: Inductance has been identified as an emerging troublemaker of interconnects for the next generation high speed digital VLSI design. As a result, accurate and fast inductance extraction is of crucial importance. Formulae based partial inductance extraction method approaches have been widely adopted for inductance extraction due to its simplicity and efficiency. However, there are so many inductance formulae in the literature and there seems luck of detail comparisons of those formulae to check their accuracy and applicability. In this paper, we carefully compare several well known partial self and mutual inductance formulae in details to check their range of applicability and validity. Since some formulae are originally derived for other applications where the parameter dimensions are quite different from the VLSI application, they are not numerically stable and accurate for all the concerned range of VLSI applications. As a result, carefulness must be deployed while applying those formulae.
author_names: Hyungsuk Kim

Charlie Chung-Ping Chen
title: Be Careful of Self and Mutual Inductance Formulae
year: 2001

abstract: In this paper, a new measurement method of the variations of the self and mutual inductances of a buried permanent magnet synchronous motor is proposed. This method allows the calculation of the inductance variations in the Concordia's reference frame without resorting to Park's assumption of sinusoidal pattern. Afterwards, these parameters are used to develop a new nonlinear torque control strategy. This controller simultaneously achieves accurate torque control (in fact the torque ripples are reduced to zero) and copper losses minimization. To reach this goal, the authors apply input output linearization techniques where the inputs are the stator voltages and the outputs are the provided torque and a judiciously chosen output linked to the copper losses in such a way that, when forced to zero, it leads to the maximum machine efficiency. The performance of the measurement method and of the control strategy is demonstrated by simulations. The results are compared to the ones obtained with a controller based on Park's assumptions.
author_names: Christophe Delecluse

Damien Grenier
title: A measurement method of the exact variations of the self and mutual inductances of a buried permanent magnet synchronous motor and its application to the reduction of torque ripples
venue: AMC'98 Coimbra. 1998 5th International Workshop on Advanced Motion Control. Proceedings (Cat. No.98TH8354)
year: 1998

abstract: This paper performs an analysis on the magnetic coupling of phases for a novel transverse flux machine (TFM) by comparison of the values of self and mutual inductance. It is shown that the proposed TFM inherits the merit of magnetic decoupling of phases as in traditional TFM, and thus can readily achieve fault tolerant operation and high precision control.
author_names: Qian Wang

Jibin Zou

Xinghe Fu

Xintong Jiang
title: Investigation of magnetic coupling of phases in a novel transverse flux machine by consideration of self and mutual inductance
venue: Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation
year: 2010