| 摘要 |
<p>A land vehicle such as a rail vehicle or a road automobile is provided with electric energy by producing an electromagnetic field on a primary side located on the track, or at a stop, of the vehicle and receiving the electromagnetic field on a secondary side onboard the vehicle above the source of the electromagnetic field by magnetic induction. A primary side conductor assembly 11 carries an alternating current to produce the electromagnetic field and a magnetisable shield assembly 23 extends sideways of, and on the same level, as the conductor 11 to shield regions that are beyond the shield from the electromagnetic field. Similarly a secondary side conductor (fig 6, 21) may have a magnetizable side shield (fig 6, 23) to shield regions beyond the shield from an electromagnetic stray field produced while the conductor is carrying current. The shield may extend from sideways of the conductor and to a level above its lateral edge to shield areas at a higher level from the electromagnetic field. The magnetisable shield may be a U-shape and extend around three sides of the lateral edge of the conductor and redirect flux F around the edge of the conductor 21.</p> |
