grundspulenaufbau of linear induktionsmotors for direct current for high-speed craft

摘要

1437356 Electric railways JAPANESE NATIONAL RAILWAYS and HITACHI CABLE Ltd 8 June 1973 [10 June 1972 28 July 1972] 27522/73 Heading B7L [Also in Division H2] A ground coil assembly for a D.C. linear induction motor such as for a high speed train comprises a plurality of armature windings each having rectangular coils connected in series and spaced by a distance L in the direction of travel, and a plurality of induction coil windings each having a plurality of separate closed coils also spaced by a distance L, the armature windings being mutually staggered by a distance of L/n where n is the number of armature windings, and the induction coil windings being each displaced a distance of L/2n from a corresponding armature winding. In the arrangement shown wherein a vehicle 10 with a field winding 4 is elevated by; and driven by, a ground coil assembly 1, 2, the armature windings are arranged in eight sets a, b, c, d, e, f, g, h mutually staggered by L/8 along the track, and the induction coil windings 2 are arranged as four sets of closed coils aSP1/SP, cSP1/SP, eSP1/SP, gSP1/SP respectively displaced by L/16 from the corresponding armature windings a, c, e, g. The embodiments of Figs. 2, 5, (not shown) respectively relate to motors with four and two armature windings, the latter having rectangular coils wound in inverse relation to one another and located at different heights. The armature coils are energized intermittently according to a predetermined sequence in each arrangement.