Potential for CO 2 Reduction by Dynamic Wireless Power Transfer for Passenger Vehicles in Japan

Osamu Shimizu, Sakahisa Nagai, Toshiyuki Fujita and Hiroshi Fujimoto
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Osamu Shimizu: Graduate School of Frontier Science, The University of Tokyo, Chiba 2778561, Japan
Sakahisa Nagai: Graduate School of Frontier Science, The University of Tokyo, Chiba 2778561, Japan
Toshiyuki Fujita: Graduate School of Frontier Science, The University of Tokyo, Chiba 2778561, Japan
Hiroshi Fujimoto: Graduate School of Frontier Science, The University of Tokyo, Chiba 2778561, Japan

Energies, 2020, vol. 13, issue 13, 1-16

Abstract: In this study, a novel system named the third-generation wireless in-wheel motor (WIWM-3), which has a dynamic wireless power transfer (DWPT) system, is developed. It can extend the cruise range, which is one of the key specifications of electric vehicles. DWPT also reduces CO 2 emission as the driving resistance is reduced due to light weight of the batteries. In this study, CO 2 emission by an internal combustion vehicle, a long range drivable electric vehicle with the same cruise range, and an electric vehicle with WIWM-3 equipped with the DWPT system are analyzed using actual measurement data and calculated data based on actual measurement or specification data. A WPT system with WIWM-3 achieves 92.5% DC-to-DC efficiency as indicated by an actual measurement at the nominal position. Thus, the electric vehicle with DWPT can reduce up to 62% of CO 2 emission in internal combustion vehicles, and the long-range drivable vehicle emits 17% more CO 2 than the electric vehicle with DWPT. Moreover, it is expected that by 2050, electric vehicles with DWPT will reduce CO 2 emissions from internal combustion vehicles by 95% in Japan. DWPT systems make electric vehicles more sustainable and, hence, more acceptable for consumers.

Keywords: dynamic wireless power transfer; CO 2 emission; electric vehicle; wireless in-wheel motor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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