Stator with a winding arrangement, in particular a distributed winding arrangement, for an electric motor
The stator winding arrangement optimizes conductor material use and reduces ohmic losses by employing a distributed design with specific slot pitches and layer jumps, addressing inefficiencies in existing hairpin conductor arrangements.
Patent Information
- Application Number
- DE102024200819
- Authority / Receiving Office
- DE · DE
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2025-07-31
AI Technical Summary
Existing distributed winding arrangements in electric motors, particularly those using hairpin conductors, suffer from inefficient use of conductor material due to large and numerous layer jumps, leading to increased ohmic losses and space requirements.
A stator winding arrangement with a distributed design where conductor strands are wound on multiple teeth, using hairpin conductors with specific slot pitches and layer jumps only between adjacent poles, minimizing intersecting conductor tracks and optimizing layer jump sections for compactness and symmetry.
This design reduces conductor material waste, minimizes ohmic losses, and optimizes space usage by ensuring compact and symmetrical layer jumps, enhancing the efficiency and compactness of the winding arrangement.
Smart Images
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Abstract
Claims
[1] Stator (0) with a winding arrangement (1), in particular a distributed winding arrangement (1), for an electric motor with a number of N slots n arranged regularly along an inner circumference (IU) of the stator (0) i , each of which is formed by two adjacent teeth i , e.g. i+1 are limited, wherein the winding arrangement (1) comprises a first conductor strand (13) and a second conductor strand (24) per electrical phase (U, V, W), and wherein all conductor strands (13, 24) are each arranged radially relative to one another within the slots n i spaced-apart conductor track layers l k by groove pitches spaced on the teeth z i wound to form a number of 2P magnetic poles p j per phase (U, V, W), and wherein layer jumps with a N2P different slot pitches are only present between exactly two adjacent poles p1, p2 of each phase (U, V, W). [2] Stator (0) with a winding arrangement (1) according to claim 1, wherein in the case of layer jumps with a N2P different slot pitch, the first conductor strand (13) of each phase (U, V, W) has a slot pitch which is different from the slot pitch of the second conductor strand (24) of the same phase (U, V, W). [3] Stator (0) with a winding arrangement (1) according to one of the preceding claims, wherein in the case of layer jumps with a slot pitch different from N / 2P, the slot pitch is equal to N2P+1 or N2P−1 is. [4] Stator (0) with a winding arrangement (1) according to one of the preceding claims, wherein at the front layer jump section (vLSA) there are exactly two layer jumps per conductor strand (13, 24) and per phase (U, V, W) with a slot pitch different from N / (2P). [5] Stator (0) with a winding arrangement (1) according to claim 4, wherein at the front layer jump section (vLSA) the layer jumps are arranged with a N2P different slot pitch only between the conductor layer l L / 2 and the conductor layer l L / 2+1 are present, where L is the number of conductor layers. [6] Stator (0) with a winding arrangement (1) according to one of the preceding claims, wherein on a rear layer jump section (hLSA) projecting from the stator (0) only layer jumps with a slot pitch of N2P are present. [7] Stator (0) with a winding arrangement (1) according to one of the preceding claims, wherein all layer jumps between two adjacent conductor track layers l k and l k+1 appear. [8] Stator (0) with a winding arrangement (1) according to one of the preceding claims, wherein 2P ≥ 4 and / or L mod 4 = 0, where L is the number of conductor track layers. [9] Stator (0) with a winding arrangement (1) according to one of the preceding claims, wherein all conductor strands (13, 24) are designed as flat wire. [10] Stator (0) with distributed winding arrangement (1) according to claim 9, wherein the flat wire is formed from hairpins. [11] Stator (0) with a winding arrangement (1) according to claim 9 or 10, wherein at all layer jumps with one of N2P different slot pitch, a first pin section (P1) of the first conductor strand (13) of a phase (U, V, W) is spaced from a second pin section (P2) of the second conductor strand (24) of the same phase (U, V, W) parallel to a rotation axis (R) of the stator (0). [12] Stator (0) with a winding arrangement (1) according to one of claims 9 to 11, wherein at all layer jumps with a slot pitch of N2P all pin sections (P) of the conductor strands (13, 24) are at the same height with respect to a rotation axis (R) of the stator (0).