%0 Conference Paper %1 Zimmer.2014 %A Zimmer, Marco %A Heinrich, Jörg %A Parspour, Nejila %B 4th International Electric Drives Production Conference (EDPC 2014) %C Piscataway, NJ %D 2014 %I IEEE %K CET IEW{\_}Konferenzbeitr{\"a}ge hp_iew %P 1--5 %R 10.1109/EDPC.2014.6984415 %T Design of a 3 kW primary power supply unit for inductive charging systems optimized for the compatibility to receiving units with 20 kw rated power %X This paper presents a power unit for use in the primary side of 3kW rated inductive charging system. The objective is the design of 3kW rated primary sides which are compatible to 20kW rated secondary side receiving units inside electric vehicles. The motivation arises from the consideration that 3kW and 20kW charging stations should be kept compatible. Compatible especially in the way that vehicles with 20kW rated receiving units should be able to use 3kW charging stations. The basis for the design of the 3kW system is a series-compensated secondary receiving coil without an additional DC/DC-converter stage between a B4 rectifier and battery with a rated power of 20kW. The absence of a DC/DC stage allows lower weight and installation space in the vehicle, but the possibility for impedance matching is missing. The system behavior is investigated analytically, so that all currents and voltages, as well as the reactive power in both compensation networks can be calculated depending on the given systems parameter, such as the inductance of the secondary coil, the coupling factor, the operation frequency and the transferred power. It is shown that the operation point with the lowest reactive power, and thus least losses in the coils and compensation capacitors, strongly depends on the design of the receiving unit. Since the receiving unit is designed for a transferred power of 20kW, an operation with 3kW will result in a significantly lower efficiency. Therefore a solution is presented, to shift the ideal operation point of the secondary side system from 20kW to a much lower value. That way, the 3kW system is able to operate very close to the shifted ideal operation point. %@ 978-1-4799-5009-6

@inproceedings{Zimmer.2014, abstract = {This paper presents a power unit for use in the primary side of 3kW rated inductive charging system. The objective is the design of 3kW rated primary sides which are compatible to 20kW rated secondary side receiving units inside electric vehicles. The motivation arises from the consideration that 3kW and 20kW charging stations should be kept compatible. Compatible especially in the way that vehicles with 20kW rated receiving units should be able to use 3kW charging stations. The basis for the design of the 3kW system is a series-compensated secondary receiving coil without an additional DC/DC-converter stage between a B4 rectifier and battery with a rated power of 20kW. The absence of a DC/DC stage allows lower weight and installation space in the vehicle, but the possibility for impedance matching is missing. The system behavior is investigated analytically, so that all currents and voltages, as well as the reactive power in both compensation networks can be calculated depending on the given systems parameter, such as the inductance of the secondary coil, the coupling factor, the operation frequency and the transferred power. It is shown that the operation point with the lowest reactive power, and thus least losses in the coils and compensation capacitors, strongly depends on the design of the receiving unit. Since the receiving unit is designed for a transferred power of 20kW, an operation with 3kW will result in a significantly lower efficiency. Therefore a solution is presented, to shift the ideal operation point of the secondary side system from 20kW to a much lower value. That way, the 3kW system is able to operate very close to the shifted ideal operation point.}, added-at = {2022-10-25T14:13:37.000+0200}, address = {Piscataway, NJ}, author = {Zimmer, Marco and Heinrich, J{\"o}rg and Parspour, Nejila}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2a830fd888e3bca421f05ba7b871f9b46/iew_homepage}, booktitle = {{4th International Electric Drives Production Conference (EDPC 2014)}}, doi = {10.1109/EDPC.2014.6984415}, interhash = {78f6791060c9e4a8795f401a2eae0482}, intrahash = {a830fd888e3bca421f05ba7b871f9b46}, isbn = {978-1-4799-5009-6}, keywords = {CET IEW{\_}Konferenzbeitr{\"a}ge hp_iew}, pages = {1--5}, publisher = {IEEE}, timestamp = {2022-10-25T12:14:06.000+0200}, title = {{Design of a 3 kW primary power supply unit for inductive charging systems optimized for the compatibility to receiving units with 20 kw rated power}}, year = 2014 }