Journal ArticleDOI
Study of high power planar inductor
TLDR
In this article, a planar inductor design method for DC-DC converters was established on the basis of a discussion of the magnetic flux density distribution, and a spiral coil with a very small distance between the conductors and a low loss magnetic sheet was developed.Abstract:
A method for planar inductor design has been established on the basis of a discussion of the magnetic flux density distribution. Planar inductors for miniature DC-DC converters have been developed using this design method. This converter is much smaller and thinner than conventional ones, and has an output power/volume ratio of 1.7 W/cc. A spiral coil with a very small distance between the conductors and a low loss magnetic sheet are required for the development of high Q planar inductors. >read more
Citations
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Journal ArticleDOI
GHz magnetic film inductors
TL;DR: In this article, the use of magnetic films for miniaturization of planar inductors operating at ultra-high frequencies is reviewed, and magnetic dissipation and their role in limiting the device operation frequency range and quality factor are discussed.
Journal ArticleDOI
Calculation of self- and mutual impedances in planar sandwich inductors
TL;DR: In this paper, two new impedance models for planar coils on a magnetic substrate of finite thickness and a planar coil sandwiched between two substrates are described, based on the electrical conductivity of the magnetic material.
Journal ArticleDOI
A magnetic thin film inductor and its application to a MHz switching dc-dc converter
Toshiro Sato,Hiroshi Tomita,Atsuhito Sawabe,Tetsuo Inoue,Tetsuhiko Mizoguchi,Masashi Sahashi +5 more
TL;DR: In this paper, a magnetic thin-film inductor using rotation magnetization was proposed, which has a sandwich structure consisting of a double-rectangular spiral coil between top and bottom CoZrNb amorphous thin films.
Journal ArticleDOI
A New Methodology for Magnetic Force Calculations Between Planar Spiral Coils
Abbas Shiri,Abbas Shoulaie +1 more
TL;DR: In this paper, a new and fast method is proposed for calculation of the magnetic forces between planar spiral coils by having the external dimension of coils and their number of turns, the force between them at different distances and with different currents can be calculated.
Journal ArticleDOI
Integrated electroplated micromachined magnetic devices using low temperature fabrication processes
Jae Yeong Park,Mark G. Allen +1 more
TL;DR: In this paper, a variety of micromachined inductors and transformers with different geometries and magnetic core materials are designed, fabricated, tested, and compared, and the effect of insertion of a core air gap was also studied.
References
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Journal ArticleDOI
Magnetic thin film inductors for integrated circuit applications
TL;DR: In this paper, the design and fabrication of small air-core inductors of sufficiently high inductance and Q for integrated-circuit applications is discussed along with experimental results on their inductance.
Journal ArticleDOI
Analysis of planar sandwich inductors by current images
TL;DR: In this paper, a spiral windings sandwiched between top and bottom-plane thick magnetic plates is investigated theoretically using the method of current images, and it is shown that the inductance depends only on the net distance between the top-and bottom magnetic plates and is independent of the position of the spiral wires within the gap, whereas in contrast to open planar structures, the sandwich inductor can yield large values of inductances with the enhancement over air core values limited only by the permeability of the magnetic plates.
Journal ArticleDOI
Analysis of the efficiency and inductance of multiturn thin film magnetic recording head
TL;DR: In this article, expressions for the flux in a multiturn thin film head are derived and used to obtain equations for the efficiency and inductance as a function of film structure and permeabilities.
Journal ArticleDOI
A new planar inductor with ring-connected magnetic core
TL;DR: In this article, a planar inductor employing a ring-connected magnetic core has been devised, which is suitable for a micro-inductor operating at high frequency and can be also used as a transformer with high coupling coefficient and low stray capacitance.