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Your search keyword '"Parspour, Nejila"' showing total 3 results
Start Over Author "Parspour, Nejila" Topic inductive power transmission
3 results on '"Parspour, Nejila"'

1. Contribution to the System Design of Contactless Energy Transfer Systems.

Author

Maier, David, Heinrich, Jorg, Zimmer, Marco, Maier, Marcel, and Parspour, Nejila

Subjects
ENERGY transfer, ELECTRIC impedance, TRANSFER functions, ELECTRIC current rectifiers, ELECTRIC inverters
Abstract

In this contribution, a design procedure that is applicable to many kinds of wireless or contactless energy transfer systems is proposed. The design procedure is limited to near field wireless energy transfer systems in resonant operation. For this purpose, the input impedance and voltage transfer function of different natural frequencies are calculated analytically, and moreover, the behavior of the system is described. Following three issues lead to a readily applicable design procedure. First, the knowledge of the transfer functions. Secondly, the knowledge of basic magnetic properties and lastly, the known influence of harmonics according to rectifier and inverter. This design procedure is demonstrated with two hardware setups. [ABSTRACT FROM AUTHOR]

Published
2019
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2. Operation of an Electrical Excited Synchronous Machine by Contactless Energy Transfer to the Rotor.

Author

Maier, Marcel and Parspour, Nejila

Subjects
*SYNCHRONOUS electric machinery, *ENERGY transfer, *ROTORS, *ROTATING machinery, *TOPOLOGY, *HIGH frequency transformers, *ELECTRIC potential
Abstract

This paper deals with the design, the setup, and the operation of a rotating contactless energy transfer (CET) system. The system is used to replace the slip rings of an electrical excited synchronous machine and to transfer energy onto the rotor of the machine without mechanical contact. A compensation topology with an autoresonant circuit to generate the high frequency voltage is presented. Furthermore, the required parameters of the CET system are calculated. Based on these calculations, the system consisting of the power electronics, the compensation network, the magnetic path, the control system, and the electrical excited synchronous machine with controller, is set up. Finally, the calculated parameters are verified by measurements. [ABSTRACT FROM AUTHOR]

Published
2018
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3. ON THE SHIELDING PROPERTIES OF CARBON FIBER REINFORCED PLASTIC COMPOSITES IN MAGNETIC NEAR FIELDS WITH LOW KILOHERTZ FREQUENCY.

Author

Holzer, Michael, Hammer, Daniel, Rothenberg, Sebastian, Sommer-Dittrich, Thomas, Bjekovic, Robert, Zimmer, Marco, Parspour, Nejila, and Middendorf, Peter

Subjects
CARBON fiber-reinforced plastics, MAGNETIC shielding, NEAR-fields, ELECTRIFICATION, INDUCTIVE power transmission
Abstract

Carbon fiber reinforced plastic (CFRP) composites are increasingly used in the automotive industry due to the high lightweight potential. In the course of vehicle electrification, there is a rising interest in wireless charging technologies at the same time. Automotive wireless charging systems are based on inductive power transfer (IPT). Magnetic fields in the low kilohertz frequency range are used to transfer power from the primary side on the ground to the secondary unit under the car body. The vehicle integration of IPT charging units requires information about the magnetic shielding properties of the surrounding materials, whether if there is high shielding or a significant permeability. This paper studies the shielding properties of continuous carbon fiber reinforced plastic in magnetic near fields with low kilohertz frequency. The shielding of alternating magnetic near fields is based on the induction of eddy currents in the material structure. The eddy current flow and therefore the shielding behavior depend on the electrical conductivity and its anisotropy. A novel experimental setup and a new contacting technique have been developed to characterize the electrical conductivity of CFRP in the fiber plane. An extensive experimental study on the anisotropic electrical conductivity of CFRP structures of different lay-up has been conducted. Thereby unidirectional, orthotropic and quasi-isotropic laminates have been investigated and evaluated concerning the magnetic shielding properties. In addition to the electrical conductivity research, a magnetic near field measurement cell was used to study the local shielding behavior. Similar composite types were tested in the frequency range of 30 - 1000 kHz. The results have been qualitatively compared and contrasted with the shielding properties of copper and aluminum specimen. [ABSTRACT FROM AUTHOR]

Published
2016

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