Patent GB-1339334-A (GB)
Title: Method and apparatus for winding dynamoelectric machine field coils
IPC: H02K15/04
Filed: 1971-11-19
Abstract: 1339334 Winding dynamo-electric machine coils ESSEX INTERNATIONAL Inc 19 Nov 1971 53921/71 Heading B3A A method of winding dynamo-electric machine field coils comprises providing at least one coil form 12 having a distal end 18 and a proximal end 14, winding a first part 50-1 of a coil 48 on the form progressing from the proximal end to the distal end and winding the remaining part 52-1 of the coil progressing from the distal end to the proximal end with the finishing end 30 of the coil adjacent the proximal end. To commence winding, a turret 16, Fig. 8, is rotated to align a coil form 12 with a winding flyer 62. A clutch 182 is actuated to rotate the flyer by a motor 180, via a belt and pulley drive 72, 74, 76, and it is oscillated over the length of coil form step 46À1 by the rotation of a heart-shaped cam 150, which moves a slide 90 via levers 142, 148. When winding is nearly completed, a counter 188 sends a warning signal through a circuit 194 to a control 196, which deactuates a clutch 158 to stop rotation of the cam 150, causes the motor 180 to run at low speed and actuates a cylinder 166 to move the slide and flyer so that the latter is adjacent the distal forward end of the step 46-1. On completion of the coil, the counter 188 sends a signal to the control 196, which, also receives a signal from a commutator 181 indicating that the flyer is in the required rotational position. The control releases a latch 100 so that a cylinder 96 can advance a block 86, on which the flyer shaft 66 is mounted, until a latch 102 engages an abutment 106 so that the flyer is now aligned with the forward end of coil form step 46-2. The clutch 158 is re-engaged to drive the cam 150, the motor 180 resumes high speed running and a coil part 50-2 is wound on the step 46-2. When winding is completed, the block 86 is again shifted to re-align the flyer, but this time the latch 102 is released and the latch 100 engages an abutment 108. Winding continues until the block 86 is in its forwardmost position to wind the smallest coil part on the step 46-4. In this position it engages a limit switch LS-1 which, through the control 196 reverses cylinder 96, but rearward movement of the block is prevented by a latch 112, which engages an abutment 116. When the early warning signal is received by the control 196, the slide is moved to position the flyer adjacent the rear end of step 46-4 with the motor 180 running at low speed. When the coil complete signal is received and when a commutator 183 indicates that the flyer is in its required rotational position, the latch 112 is released and the slide 90 is moved backwardly until a latch 114 engages an abutment 118. The winding procedure is repeated until coils 52-3, 52-2 and 52-1 have been wound. In an alternative embodiment, Fig. 9 (not shown), the flyer traverses the coil form steps so as to layer-wind the coils, the traversing movement being produced by a lead screw (202). The lead screw and the block (86) move together during each incremental step between the coil form steps. During rearward movement of the flyer, it is rotated very slowly when forming the cross-over portions (58-4)-(58-1), Fig. 5 (not shown) which lie over the coils wound during forward movement.