シリコンカーバイドインバーターがもたらす農業革命 (NREL-Developed Silicon Carbide Inverter Part of Production-Intent Program at John Deere)

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2025-01-07 米国国立再生可能エネルギー研究所

A close-up image of the silicon carbide-based John Deere traction inverter.
The John Deere traction inverter NREL helped develop can allow heavy-duty vehicles to operate with less fuel—and has many associated cost savings. Image from John Deere

米国エネルギー省の国立再生可能エネルギー研究所(NREL)は、農業機械大手のジョン・ディア社と共同で、シリコンカーバイド(SiC)を用いた新型インバーターを開発しました。このインバーターは、従来のシリコン製品と比較して約4倍の電力密度を持ち、高電圧(1,050ボルト)での動作が可能です。これにより、農業や建設業界の重機が燃料消費を削減し、運用コストや有害な排出物の低減が期待されます。現在、このSiC技術はジョン・ディア社の製品化プログラムに組み込まれています。NRELの研究者とジョン・ディア社の技術者は、5年間の開発期間を経て、この高性能かつコスト効率の高いインバーターを実現しました。さらに、小型化された筐体により、製造時のカーボンフットプリントの削減にも寄与しています。

<関連情報>

オフロードのヘビーデューティー用途向け炭化ケイ素インバータ: パワーエレクトロニクス実装における熱設計と熱機械設計の重要性 Silicon Carbide Inverter for Off-Road Heavy-Duty Applications: The importance of thermal and thermomechanical design in power electronics packaging

Brij Singh; Emily Cousineau; Paul Paret; Kevin Bennion; Sreekant Narumanchi
IEEE Electrification Magazine  Published:19 September 2023
DOI:https://doi.org/10.1109/MELE.2023.3291255

Abstract

Electrification of drivetrain systems is now seen as a major opportunity by the transportation industry across the globe to reduce the greenhouse gas emissions and revolutionize the travel patterns of millions of people. The cumulative number of plug-in hybrid and battery electric vehicles (EVs) sold in the United States has now surpassed 2 million in 2021, according to the International Energy Agency. The introduction of EVs in different classes of passenger vehicles and the continued drop in prices spurred by government incentives have attracted the attention of consumers despite certain barriers, such as higher initial cost and range anxiety. In the United States, the EV market share is now growing at an exponential pace, with the domestic automakers allocating a lion’s share of new and future car sales to EVs. Additionally, different market studies project decreasing cost and rising sales of medium- and heavy-duty electric trucks. Although electrification initiatives are strongly pursued in the on-road passenger vehicle market, off-highway sectors, such as construction, mining, and agriculture, are also gradually implementing electric drivetrain technologies in their machineries. As EVs grow in popularity on a global scale, innovative drivetrain technologies must meet the increasing energy demand by significantly increasing system efficiency.

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