Double-Flow Self-Ventilated Closed Motor Without External Enclosure
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Solution Overview
Problem
Existing closed, self-ventilated motors require a heavy and bulky external enclosure for efficient ventilation and heat exchange, which is undesirable for lightweight designs.
Innovation Solution
A motor design where the fan generates two distinct air flows: one for external cooling directed towards the first stator cooling channels and another for internal cooling directed towards the rotor cooling channels, eliminating the need for a complete external enclosure by utilizing a flange configuration that allows for efficient heat exchange without additional structural elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external enclosure is used to surround the entire motor for efficient ventilation and heat exchange, then ventilation efficiency and heat exchange are improved, but weight and bulkiness increase
Solution Approach 1:
The patent extracts the essential ventilation and heat exchange functions from a complete external enclosure and implements them through localized flange configurations with integrated cooling channels. The first and second flanges with their respective cooling channels provide the necessary thermal management without requiring a surrounding enclosure, thereby eliminating unnecessary weight and bulkiness while maintaining ventilation efficiency.
Solution Approach 2:
The patent segments the cooling system into distinct first and second cooling channels integrated into the flanges, with the first cooling channel handling external ventilation and the second cooling channel handling internal heat exchange. This segmentation allows efficient thermal management without a complete external enclosure, resolving the contradiction between ventilation efficiency and weight reduction.
2Reliability
If an external enclosure is used to surround the entire motor for efficient ventilation and heat exchange, then heat exchange performance is improved, but device complexity increases
Solution Approach 1:
The patent merges the heat exchange function into the existing flange structures by integrating cooling channels within the first and second flanges. This consolidation eliminates the need for a separate external enclosure while maintaining effective heat exchange performance, thereby reducing structural complexity without compromising thermal management.
Solution Approach 2:
The flanges serve multiple functions: structural support, sealing, and integrated cooling through the first and second cooling channels. This multi-functionality eliminates the need for additional external enclosure structures, reducing device complexity while maintaining heat exchange performance.
3Weight of stationary object
If a complete external enclosure is removed to reduce weight, then weight and bulkiness are reduced, but ventilation efficiency deteriorates
Solution Approach 1:
The flanges with integrated cooling channels serve themselves to provide ventilation and heat exchange functions without requiring an external enclosure. The first cooling channel in the first flange and the second cooling channel in the second flange create self-sufficient thermal management paths that maintain ventilation efficiency while eliminating the need for heavy enclosure structures.
4Weight of stationary object
If flange configurations with integrated cooling channels are used instead of an external enclosure, then weight is reduced, but manufacturing complexity increases
Solution Approach 1:
The cooling channels are merged into the flange manufacturing process as integrated features rather than separate components. This consolidation, while requiring advanced manufacturing capabilities for the flanges themselves, eliminates the need for separate enclosure manufacturing and assembly, potentially simplifying the overall manufacturing process despite the increased complexity of the flange casting or machining.
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
This design achieves efficient ventilation and heat exchange while maintaining a lightweight structure, enhancing the motor's performance without the need for a surrounding enclosure, thus addressing the issue of bulkiness and weight.
Implementation Method 1
the fan generates a first flow and a second flow, the first flange and the second flange being such that the first flow is directed towards the at least one first stator cooling channel then the exterior of the motor and that the second flow is directed towards the at least one second stator cooling channel then the rotor cooling channels
Data Source
Figure 1
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AI summary
The invention relates to a self-ventilating, enclosed motor (10) comprising: - a stator (14), - a rotor (12), - a shaft (16) driven by the rotor (12), - a fan (18) fixed to the shaft (16) and arranged on a first side of the rotor (12) along the main direction, - a first flange (20) arranged on the first side of the rotor (12), and - a second flange (22) arranged on a second side of the rotor (12) opposite the first side along the main direction. The fan (18) generates a first flow (32) directed towards at least a first stator cooling channel (28) and then the exterior of the motor (10), and a second flow (34) directed towards at least a second stator cooling channel (30) and then the rotor cooling channels. The invention further relates to an associated vehicle.