H - Electricity – 02 – K
Patent
H - Electricity
02
K
310/112
H02K 17/14 (2006.01) H02K 11/00 (2006.01) H02K 17/12 (2006.01) H02K 17/30 (2006.01) H02P 1/32 (2006.01)
Patent
CA 2001051
Abstract Of The Present Invention A three phase two-pole induction motor includes a three phase winding wound as a two-pole winding with an effective full pitch wound winding connected in a double delta connection. Each pole group includes a plurality of coils wound as a concentric winding or as a short pitch lap wound equivalent winding. A 36 slot stator is illustrated and includes each phase winding wound with 2 coil units each having 2 coil groups. Each coil group has 3 concentric coils and in the illustrated concentric winding the one phase winding has one group with coil sides in slots 1-3 and 16-18 and the second group in slot 19-21 and 34-36. The next phase winding has similar coils in slots 4-6 and 25-27 and in slots 7-9 and 22-24. The third phase winding has similar coils in slots 10-12 and 31-33 and in slots 13-15 and 29- 30. The coil sides of each of the two groups are connected to form a full pitch winding. Thus, coil sides in slots 1-19, in 7-25 and in 13-31 are connected to form an effective coil spanning a full pitch of 18 slots. The coil groups of different phase windings are connected in the double delta circuit connection including a series circuit connection for starting, and a parallel circuit connection for running. The simplified full pitch winding for the double delta motor winding connection allows the motor to accelerate to operating speed in the start winding connection and also reduces the starting current while minimizing side pull effects and the rate of temperature rise.
Oyster Randal A.
Watkins William J.
Marks & Clerk
Oyster Randal A.
Smith (a.o.) Corporation
Watkins William J.
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