EPE Association: EPE 2003 - Topic 01a: Passive Components

EPE 2003 - Topic 01a: Passive Components
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2003 - Conference > EPE 2003 - Topic 01: DEVICES > EPE 2003 - Topic 01a: Passive Components

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   Hf-transformer inductance decomposition using a ferrite core equivalent layout
By S. Voss [View]
[Download]

Abstract: For electronic circuit simulation in SMPS design, especially the equivalent circuit of the magnetic components such as the hf-transformers has to be known. For determination of proximity losses as well as main- and leakage-inductances of hf-transformers, the magnetic field distribution inside the winding area might be determined by solving a boundary value problem [1]. The proposed method is not applicable, if the transformer geometry is non-rotational, as i.e. an E-core. In [8], the problems of only determining the inductance of a choke on a simple gapped ferrite P-core have been discussed. In this report, a novel approach for determination of hf-transformer main- and leakage-inductances, based on a ferrite core equivalent layout will be presented. Therefore the ferrite core will be replaced by surface current loops driving a surface current distribution m K & , which has to be determined from the core’s magnetization. The magnetization may be estimated from the magnetic flux inside the core using the inductor’s magnetic circuit model. Finally, for an arbitrary transformer an analytical inductance determination will be presented, using the previously gained equivalent core layout. The proposed method is also applicable for EFD- and ETD-cores. Inductance-measurements for twowinding transformers on E-cores prove the quality of analytical simulations.

   Power converter with printed circuit board integrated passive components
By E. Waffenschmidt; B. Ackermann [View]
[Download]

Abstract: A new concept for highly integrated passive components named emPIC (embedded passives integrated circuit) is developed. All components will be integrated in the printed circuit board (PCB) using structured layers of different materials. A demonstrator with PCB integrated capacitive layers and a transformer made of ferrite polymer compound with PCB integrated windings was fabricated. The circuit is a 100 W resonant power supply with 2 x 30 V output. The PCB has a size of 15 cm x 6 cm and the transformer has a thickness 4 mm in total.

   Nonlinear conductive polymers and passive components design
By N. Rieux; M. Marugan [View]
[Download]

Abstract: The present paper describes the non-linear properties of a varistor-like composite and its potential application as protection components in power Electronics equipment.

   A novel composite based on multiwalled carbon nanotubes in a resin matrix for passive component application
By A. Allaoui; J.B. Bai; N. Rieux; M. Marugan [View]
[Download]

Abstract: This paper presents dielectric and electrical properties of a nano composite material that could be used as a new passive component for power integration.

   Study of the iron losses in integrated spiral power inductors on silicon
By J.-M. Boggetto [View]
[Download]

Abstract: A study of eddy currents in a spiral power inductor integrated on silicon is presented, stressing on the comparison between FEA and analytical results. FEA simulations are realised with FLUX2D software. Eddy current losses are computed and give informations for micro-inductors sizing and magnetic material manufacturers.

   Comparative study of nanocrystalline and soft-ferrite transformer using an optimisation procedure
By H. Chazal; J. Roudet; T. Chevalier; T. Waeckerle; H. Fraisse [View]
[Download]

Abstract: A comparative study of nanocrystalline and soft-ferrite transformer is presented, detailing advantages and drawbacks, and stressing on optimisation and parameter’s sensitivity study. Analytical models, for iron and copper-losses estimation, and a thermal model are presented. Implanted in PRO@DESIGN, it agrees with prototype measurements, and will interest manufacturers and component designers.

   Design and characterization of an integrated planar LCT component
By P. Goubier; Y. Lembeye; J.P. Ferrieux [View]
[Download]

Abstract: In a resonant DC/DC converter, the major part of the volume is filled by passive components. Moreover, all these components have to support all the power flow. On the one hand, this leads to losses in these components and their connections and on the other hand to an important cost of the converter. This paper will present a new component, called L-C-T, which permits to integrate in an unique part an inductor, a capacitor and a transformer. Because it uses only one core with 3 windings, this component will reduce the volume of the passive part of the converter. By reducing the number of connections it will, also, have a positive effect on losses. After a presentation of L-C-T components, this paper describes a design of this device, using new windings disposition. The proposed structure permits to adjust separately L and C values. Then, to validate the approach, a characterization is carried out, leading to a new model, including dielectric, iron and copper losses.

   Electromagnetic modelling of integrated passive components
By S. Faucher; C. Joubert; F. Forest [View]
[Download]

Abstract: A method of planar filters modelling with transmission lines is proposed. An analysis of electric and magnetic interactions is carried out on a prototype. This analysis makes it possible to determine the distributed elements (inductances, resistances and capacities) which are necessary for the suggested model. The method presented also makes it possible to determine some laws of planar filters design.

   Efficient sizing of passive analogical filters with methodologies and tools adapted to the designer
By F. Wurtz; L. Gerbaud; B. Cogitore; E. Clavel [View]
[Download]

Abstract: Sizing analogue passive filters may be a very complex problem. In this paper methodologies and tools are proposed to solve it. They are described on the example of a bandwidth filter. We will present them by seeing the problem from the point of view of the designer. This will allow us to show how our tools and methodologies increase his efficiency.

   Common mode choke characterisation method and modelling for EMI filter in power electronics
By B. Revol; H. Chazal; J. Roudet [View]
[Download]

Abstract: An equivalent circuit has been developed to model the linear electrical behaviour of any two windings common mode chokes. Its topology is independent of size and technology and a general method of characterization, exclusively based on external impedance measurements has been presented.

   Reducing dielectric losses in MnZn Ferrites
By J. Zhu; K.J. Tseng [View]
[Download]

Abstract: We investigated the complementary effects of TiO2 and MoO3 additives on the magnetic properties, the core loss and the dielectric properties of MnZn ferrites. We analyzed the composition factors influencing the permeability of MnZn ferrites. A high initial permeability base ZnO-MnO-Fe2O3 composition ratio has been selected. Electrical and dielectric analyses indicated that the introduction of TiO2 can improve the high frequency loss properties of MnZn ferrite cores, but such introduction will also has negative effect on the magnetic properties of the sintered samples. Introduction of MoO3 can alleviate the negative influence of TiO2 and also reduce the internal polarization intensity. As a result, the dielectric constant and corresponding dielectric loss may be reduced. Experimental results are given in the paper.

   Ultracapacitors revolutionize the power electronic world
By A. Schneuwly; G. Sartorelli; J. Auer; B. Maher [View]
[Download]

Abstract: New power-hungry electronic products such as digital cameras and wireless communication devices, increasing demand for electric power in trains and motor vehicles to assist the operating of on-board electronic systems, and the need for highly reliable back-up power are creating significant markets for energy storage and power delivery. Today, ultracapacitors are a viable component for productionintent designs in the power electronics world. Numerous firms are well into the production cycle for ultracapacitor-based systems, recognizing the advantages and availability of the ultracapacitor to meet their business and technical requirements. Ultracapacitors are available, cost effective, and perform well in industrial systems.

EPE 2003 - Topic 01a: Passive Components
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2003 - Conference > EPE 2003 - Topic 01: DEVICES > EPE 2003 - Topic 01a: Passive Components
	[return to parent folder]

	Hf-transformer inductance decomposition using a ferrite core equivalent layout By S. Voss	[View] [Download]
Abstract: For electronic circuit simulation in SMPS design, especially the equivalent circuit of the magnetic components such as the hf-transformers has to be known. For determination of proximity losses as well as main- and leakage-inductances of hf-transformers, the magnetic field distribution inside the winding area might be determined by solving a boundary value problem [1]. The proposed method is not applicable, if the transformer geometry is non-rotational, as i.e. an E-core. In [8], the problems of only determining the inductance of a choke on a simple gapped ferrite P-core have been discussed. In this report, a novel approach for determination of hf-transformer main- and leakage-inductances, based on a ferrite core equivalent layout will be presented. Therefore the ferrite core will be replaced by surface current loops driving a surface current distribution m K & , which has to be determined from the core’s magnetization. The magnetization may be estimated from the magnetic flux inside the core using the inductor’s magnetic circuit model. Finally, for an arbitrary transformer an analytical inductance determination will be presented, using the previously gained equivalent core layout. The proposed method is also applicable for EFD- and ETD-cores. Inductance-measurements for twowinding transformers on E-cores prove the quality of analytical simulations.

	Power converter with printed circuit board integrated passive components By E. Waffenschmidt; B. Ackermann	[View] [Download]
Abstract: A new concept for highly integrated passive components named emPIC (embedded passives integrated circuit) is developed. All components will be integrated in the printed circuit board (PCB) using structured layers of different materials. A demonstrator with PCB integrated capacitive layers and a transformer made of ferrite polymer compound with PCB integrated windings was fabricated. The circuit is a 100 W resonant power supply with 2 x 30 V output. The PCB has a size of 15 cm x 6 cm and the transformer has a thickness 4 mm in total.

	Nonlinear conductive polymers and passive components design By N. Rieux; M. Marugan	[View] [Download]
Abstract: The present paper describes the non-linear properties of a varistor-like composite and its potential application as protection components in power Electronics equipment.

	A novel composite based on multiwalled carbon nanotubes in a resin matrix for passive component application By A. Allaoui; J.B. Bai; N. Rieux; M. Marugan	[View] [Download]
Abstract: This paper presents dielectric and electrical properties of a nano composite material that could be used as a new passive component for power integration.

	Study of the iron losses in integrated spiral power inductors on silicon By J.-M. Boggetto	[View] [Download]
Abstract: A study of eddy currents in a spiral power inductor integrated on silicon is presented, stressing on the comparison between FEA and analytical results. FEA simulations are realised with FLUX2D software. Eddy current losses are computed and give informations for micro-inductors sizing and magnetic material manufacturers.

	Comparative study of nanocrystalline and soft-ferrite transformer using an optimisation procedure By H. Chazal; J. Roudet; T. Chevalier; T. Waeckerle; H. Fraisse	[View] [Download]
Abstract: A comparative study of nanocrystalline and soft-ferrite transformer is presented, detailing advantages and drawbacks, and stressing on optimisation and parameter’s sensitivity study. Analytical models, for iron and copper-losses estimation, and a thermal model are presented. Implanted in PRO@DESIGN, it agrees with prototype measurements, and will interest manufacturers and component designers.

	Design and characterization of an integrated planar LCT component By P. Goubier; Y. Lembeye; J.P. Ferrieux	[View] [Download]
Abstract: In a resonant DC/DC converter, the major part of the volume is filled by passive components. Moreover, all these components have to support all the power flow. On the one hand, this leads to losses in these components and their connections and on the other hand to an important cost of the converter. This paper will present a new component, called L-C-T, which permits to integrate in an unique part an inductor, a capacitor and a transformer. Because it uses only one core with 3 windings, this component will reduce the volume of the passive part of the converter. By reducing the number of connections it will, also, have a positive effect on losses. After a presentation of L-C-T components, this paper describes a design of this device, using new windings disposition. The proposed structure permits to adjust separately L and C values. Then, to validate the approach, a characterization is carried out, leading to a new model, including dielectric, iron and copper losses.

	Electromagnetic modelling of integrated passive components By S. Faucher; C. Joubert; F. Forest	[View] [Download]
Abstract: A method of planar filters modelling with transmission lines is proposed. An analysis of electric and magnetic interactions is carried out on a prototype. This analysis makes it possible to determine the distributed elements (inductances, resistances and capacities) which are necessary for the suggested model. The method presented also makes it possible to determine some laws of planar filters design.

	Efficient sizing of passive analogical filters with methodologies and tools adapted to the designer By F. Wurtz; L. Gerbaud; B. Cogitore; E. Clavel	[View] [Download]
Abstract: Sizing analogue passive filters may be a very complex problem. In this paper methodologies and tools are proposed to solve it. They are described on the example of a bandwidth filter. We will present them by seeing the problem from the point of view of the designer. This will allow us to show how our tools and methodologies increase his efficiency.

	Common mode choke characterisation method and modelling for EMI filter in power electronics By B. Revol; H. Chazal; J. Roudet	[View] [Download]
Abstract: An equivalent circuit has been developed to model the linear electrical behaviour of any two windings common mode chokes. Its topology is independent of size and technology and a general method of characterization, exclusively based on external impedance measurements has been presented.

	Reducing dielectric losses in MnZn Ferrites By J. Zhu; K.J. Tseng	[View] [Download]
Abstract: We investigated the complementary effects of TiO2 and MoO3 additives on the magnetic properties, the core loss and the dielectric properties of MnZn ferrites. We analyzed the composition factors influencing the permeability of MnZn ferrites. A high initial permeability base ZnO-MnO-Fe2O3 composition ratio has been selected. Electrical and dielectric analyses indicated that the introduction of TiO2 can improve the high frequency loss properties of MnZn ferrite cores, but such introduction will also has negative effect on the magnetic properties of the sintered samples. Introduction of MoO3 can alleviate the negative influence of TiO2 and also reduce the internal polarization intensity. As a result, the dielectric constant and corresponding dielectric loss may be reduced. Experimental results are given in the paper.

	Ultracapacitors revolutionize the power electronic world By A. Schneuwly; G. Sartorelli; J. Auer; B. Maher	[View] [Download]
Abstract: New power-hungry electronic products such as digital cameras and wireless communication devices, increasing demand for electric power in trains and motor vehicles to assist the operating of on-board electronic systems, and the need for highly reliable back-up power are creating significant markets for energy storage and power delivery. Today, ultracapacitors are a viable component for productionintent designs in the power electronics world. Numerous firms are well into the production cycle for ultracapacitor-based systems, recognizing the advantages and availability of the ultracapacitor to meet their business and technical requirements. Ultracapacitors are available, cost effective, and perform well in industrial systems.