Stator Groove Cooling Channels With Bypass Support Points
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Solution Overview
Problem
The existing stator designs in electric machines suffer from increased flow resistance and pressure loss due to clamping projections in the groove gap channels, which hinder efficient coolant flow.
Innovation Solution
Incorporating fluid channels outside the stator grooves and bypasses to reduce flow resistance and pressure loss by providing support devices with fluid channels and bypasses that allow coolant to flow through the groove gap channels with minimal obstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If clamping projections are used to clamp the conductor bundle, then the conductor bundle is securely held in the stator groove, but the flow area of the groove gap channel is narrowed causing increased flow resistance and pressure loss
Solution Approach 1:
The patent introduces an intermediary structure (support device with bypass channel) that mediates between the clamping function and the cooling function. The bypass channel allows coolant to flow around the support device, avoiding the obstruction caused by clamping projections while still enabling effective clamping of the conductor bundle.
Solution Approach 2:
The support device is segmented into multiple functional elements: clamping elements for securing the conductor bundle and bypass channels for coolant flow. This segmentation allows the clamping function to be separated from the cooling flow path, eliminating the conflict between these two functions.
2Reliability
If clamping projections are used to secure the conductor bundle, then the conductor is firmly clamped, but the groove gap channel flow resistance increases
Solution Approach 1:
The bypass channel acts as an intermediary pathway that allows coolant to circumvent the support device structure. This intermediary flow path eliminates the harmful effect of flow resistance while preserving the beneficial clamping function of the support device.
Solution Approach 2:
The bypass channel extends the coolant flow path into a different spatial dimension, routing the coolant around the support device rather than forcing it through the restricted groove gap channel. This dimensional change in the flow path resolves the conflict between clamping and cooling.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces flow resistance and pressure loss, enabling efficient coolant flow and enhanced cooling of the stator components.
Implementation Method 1
a coolant can flow through the groove gap channel
Implementation Method 2
the conductor or conductor bundle lying in the respective stator groove is clamped at several support points
Data Source
AI summary
The invention relates to a stator (1) of an electric machine (23), comprising a laminated core (3) on which stator teeth (4) and stator grooves (5) lying between the stator teeth (4) are formed and which comprises a plurality of laminations (6), wherein a single conductor (9) or a conductor bundle (10) comprising a plurality of conductors (9) is provided in each stator groove (5) in order to form an electric stator winding (8), wherein support points (11) which are mutually spaced in the axial direction are formed in the stator grooves (5) in order to support the conductor (9) or conductor bundle (10) lying in the respective stator groove (5), and at least one groove gap (14) is formed between the walls (4.2,5.1) of the respective stator groove (5) and the conductor or conductor bundle (9,10) arranged in the stator groove (5), said groove gap forming a groove gap channel (15) which extends in the axial direction and through which a coolant can flow, wherein the support points (11) are formed by support devices (12), each of which comprises one or more support discs (13) of the laminated core (3),whereinthe support devices (12) have at least one fluid channel (18) running outside of the stator groove (5) for at least one of the stator grooves (5), in particular all of the stator grooves, said fluid channel forming an inlet (18.1) or outlet (18.2) into or out of the respective groove gap channel (15) of the respective stator groove (5) and/or a bypass (18.3) for bypassing one of the support points (11) of the respective stator groove (5).