Improvements in apparatus for altering the configuration of electrical coils of inductive devices and improved method for achieving such alterations

摘要

1,105,500. Electromagnetic forming of coils. GENERAL ELECTRIC CO. 4 Nov., 1966 [10 Dec., 1965], No. 49436/66. Headings B3A and B3Q. Apparatus for altering the configuration of at least one coil of an inductive device comprises a work station for supporting an inductive device and for effecting a coil transforming operation on at least a portion of the coil, an electrical surge supply, and means for coupling the coil with the supply for generating a plurality of electrical surges in the coil to effect the transforming operation. An operator places a stator core 16 over a cylindrical member 97 of a load circuit 32 and depresses a pedal 65 which opens jaws 75, 76, of connectors 66, 67. Leads 68, 69 are placed between the open jaws and the pedal 65 is released, the coils thereby being connected to input contacts 86. Depression of an index switch 39 rotates the turntable 27 through 90 degrees to bring a completed stator to the electrical surge supply station where the contacts 86 connect with output contacts 87. The cylindrical members 88, 97, 98, 99 are made of electrically conductive non-magnetic material such as copper and produce a repulsive effect in the conductor turns when the coils are pulsed. A cardboard tube 100 is provided between the stator bore and cylindrical member. When the turntable stops, a push button 38 is depressed to initiate operation of the surge supply circuit and the operator depresses the foot pedal 65 to disconnect the lead wires of a stator that has been brought to the load circuit connection station, This stator is replaced by one requiring the coil transforming operation. During this period the surge supply circuit has injected two surges of electrical energy into the coils. The first surge presses back the conductor turns into the slots and the second effects compaction of the conductors in the slots and presses back the end turns.