• 한국자동차공학회논문집
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• 제22권2호
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• pp.44-51
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• 2014

This paper describes system definition of the extended range EV and presents cruising strategy of EV mode and ER mode. Also high voltage battery strategic SOC could be indicated and compared depends on various generator working cycles. A C-segment SUV has been produced and carried out cruising test in order to validate on highway, city and hill climbing road. This paper shows advantages and disadvantages of SOC variation on each road environments and presents the strategies as the cruising test results. On the basis of the test result, this paper suggests future works and research directions for strategy of battery management to extended range EV.

• 전기학회논문지
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• 제65권12호
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• pp.2197-2210
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• 2016

Recently, the trend of zero emissions has increased in automotive engineering because of environmental problems and regulations. Therefore, the development of battery electric vehicles (EVs), hybrid/plug-in hybrid electric vehicles (HEVs/PHEVs), and fuel cell electric vehicles (FCEVs) has been mainstreamed. In particular, for light-duty electric vehicles, improvement in electric motor performance is directly linked to driving range and driving performance. In this paper, using an improved design for the interior permanent magnet synchronous motor (IPMSM), the EV driving range for the light-duty EV was extended. In the electromagnetic design process, a 2D finite element method (FEM) was used. Furthermore, to consider mechanical stress, ANSYS Workbench was adopted. To conduct a vehicle simulation, the vehicle was modeled to include an electric motor model, energy storage model, and regenerative braking. From these results, using the advanced vehicle simulator (ADVISOR) based on MATLAB Simulink, a vehicle simulation was performed, and the effects of the improved design were described.

• Elastomers and Composites
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• 제38권2호
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• pp.157-166
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• 2003

The Edwards-Vilgis slip-link theory and the Kaliske-Heinrich extended tube theory were tested experimentally using published experimental data on networks of natural and isoprene rubber and on polysiloxane networks. All parameters were adjusted to achieve an optimum fit. The data description obtained with the EV theory is not satisfactory and the parameter values tend to lie outside their reasonably expected range. But for the region of low strains, the Kaliske-Heinrich theory offers a satisfactorily accurate data description which is able to serve for practical purposes. Its crosslink term, however, is based on approximations which lead to a questionable prediction and values determined for the exponent in the entanglement term lie outside the range expected by the KH model. Thus, the title question cannot be given a positive answer. Conclusions published earlier that the trapped entanglements contribute both to the crosslink and constraint (entanglement) term are supported by the present data analysis. Experimental equibiaxial data on hydrocarbon networks do not show any maximum on their stretch ratio dependence, contrary to the predictions of molecular theories. The stretch ratio dependences of relative reduced stresses do not sensitively reflect differences in the chemical nature of the chain backbone (hydrocarbon vs. siloxane) and in the crosslinking method (end-linking vs. random crosslinking).

• 한국자기학회지
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• 제23권2호
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• pp.49-53
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• 2013

전류센서는 하이브리드 및 전기자동차의 배터리 충 방전과 모터컨트롤러의 모니터링 시스템에 적용되는 중요한 부품이다. 본 연구에서는 자기코어의 공극에 홀센서를 위치시켜 측정전류에 의해 생성된 자기장을 감지하는 구조를 가진 open loop type의 전류센서를 개발하였다. 코어는 방향성규소강판을 사용하여 제작한 후 공극이 3 mm되게 절단하였다. 공극에서의 자기장 측정을 위하여 GaAs 홀센서를 적용하였다. 개발한 전류센서는 측정범위가 -400~+400 A에서 선형도 0.03 %를 확보하였으며, 온도보상회로를 적용하여 동작온도영역인 $-40{\sim}+105^{\circ}C$에서 전류센서의 온도특성을 향상시켰다. 전류센서의 동특성 향상을 위하여 공기자속를 제어하였다. 주파수대역폭 측정은 $40A{\cdot}turn$, 100 Hz~100 kHz의 사인파형으로 측정하여 100 kHz의 대역폭을 갖는 것으로 평가되었으며, 반응속도는 $40A{\cdot}turn$의 5 kHz 구형파로 측정하여 $2{\mu}s$ 이하의 성능을 갖는 것으로 측정되었다.