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Inductor

About: Inductor is a research topic. Over the lifetime, 52565 publications have been published within this topic receiving 484068 citations. The topic is also known as: passive two terminal.


Papers
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Journal ArticleDOI
01 Jun 1994
TL;DR: In this paper, an analytical method is proposed to discuss class E RF power amplifiers with finite choke inductors, where all parameters in these amplifiers can be expressed in terms of circuit-component values and amplifier specifications.
Abstract: An analytical method is proposed to discuss class E RF power amplifiers with finite choke inductors. All parameters in these amplifiers can be expressed in terms of circuit-component values and amplifier specifications. The component values of class E amplifiers required to achieve optimum amplification can be directly obtained after the amplifier specifications are fixed. An obvious relationship between the parameters of class E amplifiers with finite choke inductors in optimum performance can be obtained. Hence, the key function of each component in the circuit can be indicated clearly, especially in the case of a finite choke inductor. The finite choke inductor can also be used to compensate for the high intrinsic output capacitance of the active power device to extend operation frequency. To assure optimum performance and safe operation, a criterion is assigned. Based on this criterion and the optimum conditions, a maximum frequency for a transistor safely operating in class E amplifiers can also be obtained.< >

91 citations

Journal ArticleDOI
23 Jun 1996
TL;DR: In this article, a design methodology based on a simple model is proposed for a 5 MHz buck power converter application is presented, and a power density of 12.8 W/cm/sup 2/ is achieved for an efficiency of 94%.
Abstract: Possible configurations for microfabricated inductors are considered. Inductance can be set by adjusting permeability through control of anisotropy of a permalloy core, or via a patterned quasi-distributed gap. A design methodology based on a simple model is proposed. Analysis of secondary effects is also developed. A design example for a 5 MHz buck power converter application is presented. A power density of 12.8 W/cm/sup 2/ is possible for an efficiency of 94%.

90 citations

Journal ArticleDOI
30 Sep 2001
TL;DR: In this article, a planar L-L-C-T module was used for the integration of passive module for a zero-voltage-switched asymmetrical half bridge PWM converter for application in distributed power systems.
Abstract: Integrated L-L-C-T (inductor-inductor-capacitor-transformer) technology has been the subject of intensive research over the last few years. Its application to resonant power electronic converters has been reported by many previous publications. This paper presents the application of a planar L-L-C-T module to the integration of passive module for a zero-voltage-switched asymmetrical half bridge PWM converter for application in distributed power systems. Two output transformers, two current doubler inductors, the ZVS resonant inductor and the transformer DC decoupling capacitor are integrated into a single module. The design procedure is discussed and some special considerations of the L-L-C-T module in nonresonant applications are addressed. A 1 kW 300 V-400 V input, 48 V output asymmetrical half bridge PWM converter (AHBC) employing the L-L-C-T module is constructed. A comparison of the AHBC using the integrated passive module and the same circuit using discrete components is given.

90 citations

Journal ArticleDOI
TL;DR: The Biot-Savart law is employed to calculate the magnetic field strength, which results in the proximity-effect resistance in single-layer litz-wire square solenoid coils without a magnetic core, and a strand-number coefficient is introduced to reflect the influence of the strand number inside the wire bundle on the proximity -effect resistance.
Abstract: In order to achieve the highest efficiency of wireless power transfer (WPT) systems, the quality factor of the resonant coil should be as high as possible. Due to the skin effect and the proximity effect, the coil resistance increases with the increase in the frequency. The highest quality factor exists for the optimal frequency together with the corresponding frequency-dependent inductor resistance. This paper employs the Biot–Savart law to calculate the magnetic field strength, which results in the proximity-effect resistance in single-layer litz-wire square solenoid coils without a magnetic core. A strand-number coefficient is introduced to reflect the influence of the strand number inside the wire bundle on the proximity-effect resistance. The coefficient is obtained through simple inductor resistance measurements for various numbers of litz-wire strands. The optimal frequency for the highest quality factor is derived based on the resistance evaluation. Several prototype coils were manufactured to verify the resistance analysis. Two $50\,\rm{cm}\times50\, {\rm cm}$ square coils were employed to construct a WPT prototype. The maximum dc–dc efficiency of this WPT was about 75% at 100-cm distance.

90 citations

Journal ArticleDOI
TL;DR: An automated optimization procedure, based on comprehensive analytical models and the resulting optimal design parameters, to achieve the most compact and/or efficient design, is presented in this paper.
Abstract: The development of new converter systems with higher power density and/or efficiency offers many degrees of freedom for the design parameters as a large number of system component values have to be defined, where all of which are interdependent, to some extent, on another. Therefore, an automated optimization procedure, based on comprehensive analytical models and the resulting optimal design parameters, e.g., switching frequency or transformer design, to achieve the most compact and/or efficient design, is presented in this paper. In addition, the design of a volume-optimized 400/46-56-V phase-shift dc-dc converter with a current doubler rectifier and the underlying analytical models are also introduced. The power density of the converter is increased by integrating the output inductors in the transformer's core. A new lossless magnetic snubber circuit is introduced, which damps the intrinsic voltage ringing of the rectifier diodes and feeds the ringing energy to the output. The experimental results prove the analytical models and the design procedure. The 5-kW dc-dc converter prototype has a power density of 147 W/in3 (9 kW/L) and a maximum efficiency of 94.4% at 54-V output voltage and full load.

90 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023985
20222,105
20211,507
20202,637
20193,217
20183,173