Flat-angled coil having three-dimensional shape for maximizing space factor and electric motor comprising same
A flat-angled coil having a three-dimensional shape for maximizing a space factor according to the present invention comprises a unit coil comprising multiple layers which are provided to surround the peripheries of teeth of a core provided on an electric motor and laminated along the longitudinal direction of the teeth of the core so as to be integrally connected to each other continuously. The unit coil is formed such that at least a part of an adjacent portion thereof, which is adjacent to another unit coil provided in the same slot formed between the surrounded teeth of the core and the teeth of an adjacent core, is non-parallel with the side surfaces of the surrounded teeth of the core.
1. A flat-angled coil comprising a unit coil including multiple layers which are provided to surround the peripheries of teeth of a core provided on an electric motor and laminated along the longitudinal direction of the teeth of the core so as to be integrally connected to each other continuously,
wherein the unit coil is formed such that at least a part of an adjacent portion thereof, which is adjacent to another unit coil provided in the same slot formed between the surrounded teeth of the core and the teeth of an adjacent core, is non-parallel with the side surfaces of the surrounded teeth of the core,
wherein each layer of the unit coil comprises,
a slot insertion region inserted into a slot between the teeth of the cores adjacent to each other; and
an exposure region which is connected to form a predetermined angle from the slot insertion region and provided outside the slot,
wherein the unit coil is formed so that the width of the slot insertion region is gradually increased toward the layer in the outer diameter portion direction from the inner diameter portion of the electric motor,
wherein the unit coil has the same width of the exposure region formed for each layer.
2. The flat-angled coil of claim 1 , wherein the adjacent portion of the unit coil is formed to be non-parallel with side surfaces of the teeth of the core surrounded in a continuous straight shape throughout the multiple layers.
3. The flat-angled coil of claim 2 , wherein an angle between the side surfaces of the teeth of the core surrounded by the unit coil and the adjacent portion is determined by a geometric shape of the unit coil, which may be changed according to the number of slots provided in the electric motor.
4. The flat-angled coil of claim 1 , wherein the unit coil is formed so that the thickness thereof is gradually decreased toward the layer in the outer diameter portion direction from the inner diameter portion of the electric motor.
5. The flat-angled coil of claim 1 , wherein in both end portions of the unit coil, end winding connection portions to which an end winding member for connection with another unit coil is connected are formed.
6. The flat-angled coil of claim 5 , wherein an end portion of the unit coil is provided within a laterally cross-sectional range of the unit coil, and
the end winding connection portion is formed so that at least a part of the width of the end portion of the unit coil is removed to form a step in a lateral direction.
7. The flat-angled coil of claim 5 , wherein an end portion of the unit coil is provided within a laterally cross-sectional range of the unit coil, and
the end winding connection portion is formed so that at least a part of the thickness of the end portion of the unit coil is removed to form a step in a vertical direction.
8. The flat-angled coil of claim 5 , wherein the end winding connection portion is formed to protrude above the laterally cross-sectional range of the unit coil.
9. An electric motor comprising the flat-angled coil of claim 1 .