| 摘要 |
1,099,039. Making armatures. GENERAL ELECTRIC CO. Nov. 10, 1965 [Nov. 12, 1964], No. 47687/68. Heading B3A. [Also in Divisions B5 and H2] A coreless armature is made by arranging the conductors 25 to have all coil sides 32 in sideby-side relationship in a single layer around a cylindrical removable moulding core 102. then encapsulating the armature winding with a liquid casting resinous material 24 and after hardening the resin removing the moulding core. The commutator 22 is also bonded to the encapsulated winding by the resin adhering to an annular aluminium ring 52 which may be integral with or attached to the commutator support 46, as shown, so as to support the armature winding for rotation with a shaft 15. A layer of resin impregnated glass cloth 75 may be provided at the inner surface of the armature winding during assembly. The conductors may be bound with insulating tapes (74), Fig. 2 (not shown), before or after encapsulation to reinforce the armature against centrifugal forces. The conductors are formed with bands, so that they may overlap each other at their ends 60, 61. During assembly groups of conductors are strung to a jig 200 by ties 205 which are removed after the moulding core 102 has been assembled within the conductor arrangement. The aperture may be used in D.C. motors or generators having a fixed core and a permanent or electromagnetic field. |
