Development of Thin In-Wheel-Motor Unit for EVs


As a means of adding value to electric vehicles (EVs), new control methods have been investigated for EVs equipped with in-wheel motors (IWMs). As part of their project to reduce the energy usage of vehicles and add value of vehicle dynamics, the authors are carrying out research and development of the thin IWM units needed to validate this concept. They have been investigating face gears, which offer a large speed reduction using just a single pair of gears. The face gear is directly attached to the wheel axle and the pinion is on the motor axle. Placing the wheel axle at a right angle to the motor axle allows efficient use of the space in the open center of the face gear, allowing a very thin unit to be designed. The capabilities of the IWM unit manufactured in this study were assessed on a test bench and its efficiency and noise while powered were evaluated. The results revealed that the torque of the motor was as high as controlling EVs.インホイールモータを用いた電気自動車は四輪の駆動力を独立に制御できる点で優れている一方,モータユニットを小型化する背反として効率面や静音性の向上が大きな課題である.本研究では,薄型で高減速比の視点からフェースギヤを採用したインホイールモータを開発し,高効率化と静音性の両立が可能な見込みを得た.


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  • Accession Number: 01673459
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: May 15 2018 3:05PM