xEVの性能評価に用いるシャシダイナモメータシステム要件の検討（第4報）
-実走行状態の再現を目的としたJASO E018 Part-3の概要-

中手　紀昭（日本自動車輸送技術協会）・鈴木　央一（自動車技術総合機構）・井上　勇（小野測器）・古田　智信（明電舎）・廣瀬　翼（堀場製作所）

実走行時の燃費・電費・排出ガス評価や多種多様な走行を台上で再現するためシャシダイナモメータの制御性要件とその性能評価法を規定したJASO E018規格に，xEVの動力特性を考慮し，それらの車両においても高い精度での評価を可能とする手法及び評価指標を新たに規格化した．その概要及び各種要件を決めたポイントを報告する．

From REEV to Hyper-REEV - Enhancing the Driving Pleasure of Electrified Super Cars

Sens Marc (IAV)･Christoph Koehler (IAV)･Michael Riess･Alexander Fandakov (IAV)

Battery-powered electric drives are shaping the future of passenger cars, but electrified sports cars face reservations due to a lack of emotion. This article presents a powertrain concept for super sports cars that combines electric drive with combustion engine emotions using a range extender. The Hyper-REEV mode synchronizes engine acoustics with acceleration, offering high emotion and high efficiency. The article analyzes requirements and solutions for Hyper-REEV components, including battery design, e-machines, power electronics, and generator. The combustion engine's role is decisive, showcasing high efficiency and dynamic performance. The final part covers the overall concept and control strategy linked to SDV.

異種テストベンチ連携による車両模擬試験システムの基本性能検証

小松　陽二（堀場製作所）

車両電動化の進展により，サブシステム段階での車両レベル評価の重要性が増している．本研究では，バッテリやパワートレインなどの異種テストベンチを連携させた車両模擬試験システムTILSについて，両ベンチを通信により連携する手法と，バス接続により実機環境を模擬した手法との応答性比較により，基本性能検証を行った．

Accelerated Reliability Assessment for Power Electronics: Optimizing Traditional Testing Methods for EV Applications

Gerard Ibars Escarre･Yasmine Himene･Javier A. Corea-Araujo (IDIADA Automotive Technology S.A.)

This paper investigates how optimized accelerated testing methodologies can reduce validation timeframes for power electronics in electric vehicle development. Current OEM approaches utilizing Power-Thermal-Cycle-Endurance and High-Temperature-Operation-Endurance protocols require >6-month validation cycles, conflicting with 2-year EV production timelines. Laboratory data reveals limitations applying conventional power cycling to GaN-based OBCs and SiC DC-DC converters, where standard Coffin-Manson models show reduced applicability. Analysis of physics-of-failure approaches and mission profile-oriented strategies demonstrates potential timeframe reductions. Results indicate properly configured accelerated aging tests incorporating junction temperature swing control and realistic switching conditions maintain reliability assessment accuracy while significantly accelerating validation processes for modern automotive power electronics.

A Study on Electrical Efficiency Improvement and Heating Control via Induced Inefficiencies of an Electric Compressor for EV Energy Consumption Improvement

Woojun Hur (Hyundai Motor)

This study proposes an integrated strategy to improve the electrical efficiency of electric compressors in electric vehicles (EVs), focusing on improvements in both motor design and inverter control. Key optimizations were applied to stator and rotor parameters, along with advanced inverter control techniques such as MTPA, DPWM, and SiC MOSFET integration. Additionally, a novel loss-based heating control method was explored to support heat pump operation under cold ambient conditions. Experimental validation confirms the effectiveness of the proposed approach, demonstrating its potential for improving EV energy consumption and system-level thermal management.