EPE Association: EPE 2016 - LS6b: EV's Batteries and Chargers

EPE 2016 - LS6b: EV's Batteries and Chargers
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2016 ECCE Europe - Conference > EPE 2016 - Topic 08: e-Mobility > EPE 2016 - LS6b: EV's Batteries and Chargers

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   Components Selection of a Direct Three-Phase to Single-Phase AC/AC Converter for a Contactless Electric Vehicle Charger
By Ferdi Perdana KUSUMAH [View]
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Abstract: This paper explains a procedure on how to select resonant circuit components of a unique direct three-phase to single-phase AC/AC converter for a contactless electric vehicle (EV) charger. The topology has a fewer bi-directional switches than a matrix converter and consists of a resonant circuit to utilize a zero-current switching (ZCS) mechanism. The selection goal was to realize a working prototype that does not violate each electrical component's limitations as well as has a low resonant damping ratio since the switches are driven based on a resonant current. Selection methods were based on graphical analysis of damping factor, resonant frequency, and primary circuit voltage and current characteristics derived from dynamic and steady-state models. Simulation results are then presented to validate the selection procedures.

   Field test results of interoperable electric vehicle wireless power transfer
By Olaf SIMON [View]
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Abstract: To provide a public infrastructure for wireless power transfer (WPT) to electrical vehicles, the abilityof interoperable use between infrastructure and vehicle parts of different manufacturers is necessary.Based on the interoperability definition given in IEC 61980-3 (draft) Annex AA several different primaryand secondary devices (pickups) have been realized by four manufacturers and have been appliedto full electric cars. Experimental results of the interoperability check and field test results ofcross manufacturer vehicle operation are presented, proving the usability of the interoperability definition.

   Optimal Design of a Matrix Converter with a LC Active Buffer for On-board Vehicle Battery Charger in Single Phase Grid Structure
By Teck Chiang GOH [View]
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Abstract: This paper discusses a design approach of an isolated type of single phase power converter that uses a matrix converter (MC) with a LC active buffer for the on-board vehicle battery charger in PHEV/EV. The MC is advantaged in terms of size due to the lack of DC bus, where the electrolytic capacitor is not required as direct conversion of AC/AC is possible. However, in the case of single phase, the 50/60 Hz grid power will cause power fluctuation in the battery current due to the lack of smoothing capacitor in the matrix converter stage. In order to compensate the power fluctuation, a LC buffer that utilizes the center-tapped of transformer in the inverter (INV) stage has been discussed. As a result, the circuit features small size because a low volume of capacitor is achieved. Furthermore, switching loss in MC stage is greatly reduced because the switching devices can achieve ZVS (zero voltage switching) behavior by using a synchronize control. In this paper, first the tradeoff relationship between the capacitor volume and efficiency which is subjected to the voltage conditions is discussed. Then, a design flow chart that considers between the capacitor volume, isolated transformer and device losses are discussed accordingly. Finally, based on the design flow chart, an ultraslim thickness of prototype (203mm x 113mm x 10mm) was constructed and the results show a conversion efficiency of 92\% at a power density of 4.36W/cc.

   Parameterization of equivalent circuit models for high-power lithium-ion batteries in HEV application
By Stefan SKOOG [View]
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Abstract: Three different linear equivalent electrical circuit models for power optimized lithium-ion batteries areparameterized and compared in a long dynamic load cycle representing typical hybrid electric vehicleusage. The goal is to estimate the voltage on the battery terminals by only using an open-loop electricalmodel. Model parameters are extracted trough a simple discharge pulse test and the parameter results arepresented for five different types of batteries. A quantification of the model fit is presented and comparedwith similar studies.

EPE 2016 - LS6b: EV's Batteries and Chargers
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2016 ECCE Europe - Conference > EPE 2016 - Topic 08: e-Mobility > EPE 2016 - LS6b: EV's Batteries and Chargers
	[return to parent folder]

	Components Selection of a Direct Three-Phase to Single-Phase AC/AC Converter for a Contactless Electric Vehicle Charger By Ferdi Perdana KUSUMAH	[View] [Download]
Abstract: This paper explains a procedure on how to select resonant circuit components of a unique direct three-phase to single-phase AC/AC converter for a contactless electric vehicle (EV) charger. The topology has a fewer bi-directional switches than a matrix converter and consists of a resonant circuit to utilize a zero-current switching (ZCS) mechanism. The selection goal was to realize a working prototype that does not violate each electrical component's limitations as well as has a low resonant damping ratio since the switches are driven based on a resonant current. Selection methods were based on graphical analysis of damping factor, resonant frequency, and primary circuit voltage and current characteristics derived from dynamic and steady-state models. Simulation results are then presented to validate the selection procedures.

	Field test results of interoperable electric vehicle wireless power transfer By Olaf SIMON	[View] [Download]
Abstract: To provide a public infrastructure for wireless power transfer (WPT) to electrical vehicles, the abilityof interoperable use between infrastructure and vehicle parts of different manufacturers is necessary.Based on the interoperability definition given in IEC 61980-3 (draft) Annex AA several different primaryand secondary devices (pickups) have been realized by four manufacturers and have been appliedto full electric cars. Experimental results of the interoperability check and field test results ofcross manufacturer vehicle operation are presented, proving the usability of the interoperability definition.

	Optimal Design of a Matrix Converter with a LC Active Buffer for On-board Vehicle Battery Charger in Single Phase Grid Structure By Teck Chiang GOH	[View] [Download]
Abstract: This paper discusses a design approach of an isolated type of single phase power converter that uses a matrix converter (MC) with a LC active buffer for the on-board vehicle battery charger in PHEV/EV. The MC is advantaged in terms of size due to the lack of DC bus, where the electrolytic capacitor is not required as direct conversion of AC/AC is possible. However, in the case of single phase, the 50/60 Hz grid power will cause power fluctuation in the battery current due to the lack of smoothing capacitor in the matrix converter stage. In order to compensate the power fluctuation, a LC buffer that utilizes the center-tapped of transformer in the inverter (INV) stage has been discussed. As a result, the circuit features small size because a low volume of capacitor is achieved. Furthermore, switching loss in MC stage is greatly reduced because the switching devices can achieve ZVS (zero voltage switching) behavior by using a synchronize control. In this paper, first the tradeoff relationship between the capacitor volume and efficiency which is subjected to the voltage conditions is discussed. Then, a design flow chart that considers between the capacitor volume, isolated transformer and device losses are discussed accordingly. Finally, based on the design flow chart, an ultraslim thickness of prototype (203mm x 113mm x 10mm) was constructed and the results show a conversion efficiency of 92\% at a power density of 4.36W/cc.

	Parameterization of equivalent circuit models for high-power lithium-ion batteries in HEV application By Stefan SKOOG	[View] [Download]
Abstract: Three different linear equivalent electrical circuit models for power optimized lithium-ion batteries areparameterized and compared in a long dynamic load cycle representing typical hybrid electric vehicleusage. The goal is to estimate the voltage on the battery terminals by only using an open-loop electricalmodel. Model parameters are extracted trough a simple discharge pulse test and the parameter results arepresented for five different types of batteries. A quantification of the model fit is presented and comparedwith similar studies.