A STUDY ON THE INDUCTIVE COUPLING SYSTEM

In recent years, the electric vehicle (EV) has attracted growing interest for its environmentally friendly features. Although a great deal of effort has been placed in battery development to increase the range of EV per charge, there is still a large gap between conventional vehicles and EVs. The inductive coupling system that transfers energy contactlessly from inductors buried beneath the road surface to an EV's on-vehicle inductor is promising to overcome the range limitation of EVs. The primary concern is whether this system can be more efficient for vehicles running at cruising speeds on freeways (100 km/h) than Pb acid battery. The drawback of this system is that efficiency decreases as the lateral offset between the road inductor and the on-vehicle inductor increases. Three conclusions were reached. Computer simulation has found that a core-type inductor provides less degradation of efficiency in the event of a large lateral offset than other types of inductors. The efficiency of this type of inductor was evaluated by experiment using a 70 percent reduced-size model and it was confirmed that the simulation coincides with results of the experiment. Assuming that the probability of the lateral offset between inductors of this system follows the normal distribution, the standard deviation of the offset must be less than 20 cm to obtain higher efficiency than Pb acid battery, which motivates the introduction of an auto-steering mechanism in vehicles at cruising speeds on freeways.

  • Supplemental Notes:
    • Five volumes of papers and one volume of abstracts comprise the published set of conference materials.
  • Corporate Authors:

    VERTIS

    TORANOMOM 34 MORI BUILDING 1-25-5
    TORANOMON, MINATOKU, TOKYO 105  Japan 
  • Authors:
    • Arisaka, S
    • Isojima, S
    • OHKUBO, H
    • Suzuki, T
    • Nagao, E
  • Conference:
  • Publication Date: 1995-11

Language

  • English

Media Info

  • Pagination: p. 1011

Subject/Index Terms

Filing Info

  • Accession Number: 00722030
  • Record Type: Publication
  • Report/Paper Numbers: Volume 2
  • Files: TRIS
  • Created Date: Jun 23 1996 12:00AM