SYMMETRICAL THREE-PHASE BIPOLAR TWO-LAYER WINDING Russian patent published in 2005 - IPC

FIELD: electric machine industry, applicable in manufacture and laying of two-layer windings of three-phase bipolar asynchronous and synchronous electric motors.

SUBSTANCE: in a symmetrical three-phase bipolar two-layer windings the coils are divided into 6 groups and laid by two layers in Z=6q slots, where q>2 is an integral number of uniformly distributed along the running air gap so that the first layer is formed by analogous (left-hand or right-hand) active sides of the coils, which occupy a half of each slot, the second layer that occupies the remaining the remaining volume of each slot, is formed by the opposite (right-hand or left-hand active sides of the coils. According to the invention, each coil group of the winding made of (q-m) coils, where l≤m<q is an integral number, ia laid in (q-m) of the adjacent slots with pitch 4=2q and omission of m slots between the adjacent groups.

EFFECT: variation of the quantity of coils in the coil groups and the new order of coil laying in the slots make it possible to the increase the winding coefficient in the working harmonic at a simultaneous reduction of the cost of insulation and winding wire.

1 dwg