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US7863847: Power unit

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Filing Information

Inventor(s) Hideki Morita · Tetsurou Hamada ·
Assignee(s) Honda Motor Co., Ltd. ·
Attorney/Agent(s) Squire, Sanders & Dempsey L.L.P. ·
Primary Examiner Walter Besnon ·
Assistant Examiner Eduardo Colon ·
Application Number US12216585
Filing date 07/08/2008
Issue date 01/04/2011
Prior Publication Data
Predicted expiration date 07/03/2029
Patent term adjustment 360
U.S. Classifications 318/539  · 180/651  · 475/5  · 310/115  · 180/656  · 318/540  ·
International Classifications B60K600  · B60L1114  · H02K2360  ·
Kind CodeB2
Foreign Priority JP2007197995 - 07/30/2007 ·
3 Claims, 21 Drawings


Abstract

A power unit which makes it possible to reduce power transmitted from a prime mover to a driven part via an electrical path, to thereby increase the efficiency of driving the driven part. A first rotating machine of the power unit inputs and outputs energy between a stator and first and second rotors thereof, via magnetic circuits formed by generation of a rotating magnetic field, and the rotating magnetic field, and the rotors rotate while maintaining a linear relation in which respective differences in rotational speed between the rotating magnetic field and the second rotor, and between the second and first rotors are equal. The rotors are mechanically connected to a prime mover and a transmission, respectively. A second rotating machine of the power unit is mechanically connected to a drive part without via the transmission, and electrically connected to the stator.

Independent Claims | See all claims (3)

  1. 1. A power unit that drives a driven part for propelling a transport mechanism, comprising: a prime mover; a transmission that is mechanically connected to said prime mover; a first rotating machine including an immovable stator for generating a rotating magnetic field, a first rotor formed by magnets and disposed in an opposed relation to said stator, and a second rotor formed of a soft magnetic material and disposed between said stator and said first rotor, said first rotating machine being configured to input and output energy between said stator, said first rotor, and said second rotor, via magnetic circuits formed by generation of the rotating magnetic field, and such that in accordance with the energy input and output, the rotating magnetic field, and said first and second rotors rotate while maintaining a linear relation in which a difference in a rotational speed of the rotating magnetic field and a rotational speed of said second rotor, and a difference between the rotational speed of said second rotor and a rotational speed of said first rotor are equal to each other, said second rotor being mechanically connected to said prime mover, and said first rotor being mechanically connected to said transmission; and a second rotating machine mechanically connected to said driven part without via said transmission, and electrically connected to said stator.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US5225744* Aisin Aw Co., Ltd. Ishikawa et al. Jul 1993
US5346441* Fichtel & Sachs AG Kurz et al. Sep 1994
US6005358* Radev Dec 1999
US6159127* Robert Bosch GmbH Loeffler et al. Dec 2000
US6401849* Denso Corporation Seguchi et al. Jun 2002
US7497285* Radev Mar 2009
US20030181276* NISSAN MOTOR CO., LTD. Minagawa et al. Sep 2003
US20070213158* PEUGEOT CITROEN AUTOMOBILES SA Laeuffer Sep 2007
US20080142284* General Electric Company Qu et al. Jun 2008
US20100025128* Honda Motor Co., Ltd. Abe et al. Feb 2010
US20100056312* HONDA MOTOR CO., LTD. Akutsu et al. Mar 2010
US20100071974* HONDA MOTOR CO., LTD. Akutsu et al. Mar 2010
US20100170732* Glaser et al. Jul 2010

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
DE29624299TOYOTA MOTOR CO LTDJan 2002
EP1340645TOYOTA JIDOSHA KABUSHIKI KAISHASep 2003
FR2834248RENAULTJul 2003
FR2834938RENAULTJul 2003
JP2000197324DENSO CORPJul 2000
* cited by examiner

Other Publications

Erik Nordlund et al., “The Four-Quadrant Energy Transducer”, Conference Record of the 2002 IEEE Industry Applications Conference, Oct. 2002, pp. 390-397.
European Search Report 08159708.0-2421/2020326 dated Jul. 9, 2009.

Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US8044628 Honda Motor Co., Ltd. Naoki Fujishiro et al. Oct 2011
US8043181 Honda Motor Co., Ltd. Noriyuki Abe et al. Oct 2011

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