Outer Rotor Motor Cooling With Exhaust Plates and Annular Fan
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Solution Overview
Problem
Motors with an outer rotor integrated with a governor face challenges in heat dissipation, with existing cooling structures being inadequate, leading to excessive temperature issues and maintenance difficulties.
Innovation Solution
A motor design featuring a cylindrical outer rotor with a cooling fan annularly arranged around it, combined with exhaust plates and air outlets for enhanced air circulation and heat dissipation, along with detachable cooling components for ease of maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling blades are designed on the rotor housing to implement air cooling, then air cooling is provided, but the cooling structure is simple in design and poor in cooling effect
Solution Approach 1:
The cooling system is segmented into multiple functional components: cooling blades on the rotor housing for outer rotor cooling, exhaust plates inside the rotor for enhancing air circulation, and air outlets strategically positioned on the rotor peripheral wall. This segmentation allows each component to perform its specific cooling function efficiently, transforming a simple cooling structure into a multi-component integrated cooling system.
Solution Approach 2:
The exhaust plates are nested within the rotor housing, positioned to work in conjunction with the cooling blades on the outer surface. The exhaust plates are arranged in the radial direction of the rotor, creating a nested configuration where internal exhaust structures work together with external cooling blades to achieve enhanced cooling效果 without increasing overall device volume.
2Temperature
If cooling blades are designed on the rotor housing, then air cooling is provided for the outer rotor main body, but the governor heat cannot be dissipated
Solution Approach 1:
The cooling system is designed with multi-functionality to serve both the outer rotor and the governor. The exhaust plates are positioned to create air circulation paths that reach both the outer rotor main body and the governor housing. The air outlets are strategically arranged to enable cooling air to flow through both components, allowing a single cooling system to perform multiple cooling functions simultaneously.
Solution Approach 2:
The cooling approach transitions from a single-dimension surface cooling (cooling blades on rotor housing) to a multi-dimensional cooling system by adding internal exhaust plates that create three-dimensional air circulation patterns. This allows cooling air to reach both the outer rotor and the governor through different spatial paths, enabling comprehensive heat dissipation for both components.
3Volume of moving object
If the motor is designed with high integration, then small size and light weight are achieved, but heat dissipation capability deteriorates
Solution Approach 1:
The cooling system merges multiple cooling functions into a single integrated structure. The cooling blades, exhaust plates, and air outlets are combined into one unified cooling system that serves both the outer rotor and governor. This merging allows effective heat dissipation to be achieved within the compact integrated motor structure without requiring separate cooling systems for different components.
Solution Approach 2:
The cooling system utilizes dynamic air circulation created by the rotating rotor to enhance heat dissipation. The exhaust plates are positioned to leverage the rotational motion of the rotor, creating dynamic air flow patterns that improve cooling efficiency. This dynamic cooling approach allows effective heat dissipation in a compact design without requiring additional static cooling components that would increase size.
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 design effectively dissipates heat from both the outer rotor and the governor, improving the motor's performance and service life while simplifying maintenance and replacement processes.
Implementation Method 1
a cooling fan annularly arranged in a circumferential direction of the outer rotor at one end of the outer rotor close to the controller and located in an avoidance space formed between the controller and the outer rotor, so as to convey air to the controller and the outer rotor
Implementation Method 2
an inner wall of the outer rotor facing the opening is provided with an exhaust plate, and the exhaust plate is configured to push air in the outer rotor to each of the air outlets
Data Source
AI summary
A motor with an outer rotor, including an inner stator, an outer rotor with a cylindrical structure having an open end, a controller, and a cooling fan. The outer rotor is rotatably sleeved at one end of the inner stator in an axial direction of the inner stator; the controller is arranged at the other end of the inner stator; the cooling fan is annularly arranged in a circumferential direction of the outer rotor at one end of the outer rotor close to the controller, and is located in an avoidance space formed between the controller and the outer rotor, so as to convey air to the controller and the outer rotor.