EPE Association: EPE 2013 - LS1c: Passive Components and Integrated Passive Components

EPE 2013 - LS1c: Passive Components and Integrated Passive Components
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2013 ECCE Europe - Conference > EPE 2013 - Topic 02: Passive components, system integration & packaging > EPE 2013 - LS1c: Passive Components and Integrated Passive Components

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   Acoustic Noise in Inductive Power Components
By Jonas MUEHLETHALER, Manuel SCHUBIGER, Uwe BADSTUEBNER, Johann W. KOLAR [View]
[Download]

Abstract: This paper deals with the acoustic emissions of PWM-operated inductive components in the medium frequency range. It is shown with measurements that the noise emissions are primarily caused by magnetostriction, an induction-dependent dimensional change of the magnetic core. The influences of various modulation parameters on the sound pressure level spectra of two prototypes are measured and analyzed. It is confirmed that the emitted sound is proportional to the square of the magnetic flux density.

   Analytical model for the thermal resistance of windings consisting of solid or litz wire
By Michael JARITZ, Jurgen BIELA [View]
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Abstract: In this paper a method to calculate the thermal resistance of windings is presented and validated bymeasurements. Two formulas have been developed for widely used wire types in power electronicsbeing round and litz wire. With the presented approach it is possible to describe the thermal resistanceof arbitrary wire arrangements. This analytical approach can either be used in fast forward designs ofmagnetic devices, respectively can also be integrated in automatized optimization procedures to improvethe designs of magnetic components. The calculated results are showing good coincidence with themeasured values.

   Capacitors for High Temperature DC Link Applications in Automotive Traction Drives: Current Technology and Limitations
By Dave WINTERBORNE, Mingyao MA, Haimeng WU, Volker PICKERT, James WIDMER, Peter BARRASS, Laxman SHAH [View]
[Download]

Abstract: Recent years have seen an increase in the use of electric traction drives for automotive applications. Thisfield is rapidly advancing thanks to the drive for greater power density in such drive systems, and thiscan place additional demands on the DC link capacitor. This component must maintain high reliabilityand long life, while storing large amounts of charge at high voltage, but the constraints it introduces areoften not considered fully.The aim of this paper is to provide an overview of this field at the present time, which is currently lackingin the literature; identify limitations of current technology; and provide impetus for future research.Current dielectric materials and their suitability for this application are assessed and compared, and thenthe direction of current research into novel materials is investigated.

   Design and Optimization of Medium Frequency, Medium Voltage Transformers
By Peng SHUAI, Jurgen BIELA [View]
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Abstract: Medium voltage, medium frequency transformers (MFTs) are much smaller in size and weight comparedto conventional low frequency transformers. The MFTs are very attractive for applications where fullcontrol of the power flow and high power density are required, such as power electronic interface insmart grids and traction converter system. With reduced size, the optimal design of MFTs becomesmore challenging due to the high isolation requirement and thermal stress. This paper presents a designand optimization methodology for MFTs with emphasis on thermal and insulation design. The improvedthermal model for multi-layer windings consisting of litz-wire and the analytical calculation of maximumelectric field in core window area are included in the optimization process. By using the methodology,the optimal designs of a 25 kW/4 kHz MFT with two commonly used core materials are compared. Thepossibility of volume reduction by increasing the operating frequency is also investigated.

EPE 2013 - LS1c: Passive Components and Integrated Passive Components
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2013 ECCE Europe - Conference > EPE 2013 - Topic 02: Passive components, system integration & packaging > EPE 2013 - LS1c: Passive Components and Integrated Passive Components
	[return to parent folder]

	Acoustic Noise in Inductive Power Components By Jonas MUEHLETHALER, Manuel SCHUBIGER, Uwe BADSTUEBNER, Johann W. KOLAR	[View] [Download]
Abstract: This paper deals with the acoustic emissions of PWM-operated inductive components in the medium frequency range. It is shown with measurements that the noise emissions are primarily caused by magnetostriction, an induction-dependent dimensional change of the magnetic core. The influences of various modulation parameters on the sound pressure level spectra of two prototypes are measured and analyzed. It is confirmed that the emitted sound is proportional to the square of the magnetic flux density.

	Analytical model for the thermal resistance of windings consisting of solid or litz wire By Michael JARITZ, Jurgen BIELA	[View] [Download]
Abstract: In this paper a method to calculate the thermal resistance of windings is presented and validated bymeasurements. Two formulas have been developed for widely used wire types in power electronicsbeing round and litz wire. With the presented approach it is possible to describe the thermal resistanceof arbitrary wire arrangements. This analytical approach can either be used in fast forward designs ofmagnetic devices, respectively can also be integrated in automatized optimization procedures to improvethe designs of magnetic components. The calculated results are showing good coincidence with themeasured values.

	Capacitors for High Temperature DC Link Applications in Automotive Traction Drives: Current Technology and Limitations By Dave WINTERBORNE, Mingyao MA, Haimeng WU, Volker PICKERT, James WIDMER, Peter BARRASS, Laxman SHAH	[View] [Download]
Abstract: Recent years have seen an increase in the use of electric traction drives for automotive applications. Thisfield is rapidly advancing thanks to the drive for greater power density in such drive systems, and thiscan place additional demands on the DC link capacitor. This component must maintain high reliabilityand long life, while storing large amounts of charge at high voltage, but the constraints it introduces areoften not considered fully.The aim of this paper is to provide an overview of this field at the present time, which is currently lackingin the literature; identify limitations of current technology; and provide impetus for future research.Current dielectric materials and their suitability for this application are assessed and compared, and thenthe direction of current research into novel materials is investigated.

	Design and Optimization of Medium Frequency, Medium Voltage Transformers By Peng SHUAI, Jurgen BIELA	[View] [Download]
Abstract: Medium voltage, medium frequency transformers (MFTs) are much smaller in size and weight comparedto conventional low frequency transformers. The MFTs are very attractive for applications where fullcontrol of the power flow and high power density are required, such as power electronic interface insmart grids and traction converter system. With reduced size, the optimal design of MFTs becomesmore challenging due to the high isolation requirement and thermal stress. This paper presents a designand optimization methodology for MFTs with emphasis on thermal and insulation design. The improvedthermal model for multi-layer windings consisting of litz-wire and the analytical calculation of maximumelectric field in core window area are included in the optimization process. By using the methodology,the optimal designs of a 25 kW/4 kHz MFT with two commonly used core materials are compared. Thepossibility of volume reduction by increasing the operating frequency is also investigated.