Fan With Outer Electronics Reduces Axial Space
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Solution Overview
Problem
Existing fan designs with integrated motor control electronics require significant axial installation space and lack easy access for replacement, limiting cooling options and component size due to sealed electronics housings and compact stator designs.
Innovation Solution
A fan design with a housing upper part featuring an axial opening for the stator and electronics mounted on the outer side, eliminating the need for a separate electronics housing, allowing external access and replacement, and utilizing a connecting ring for wireless connection to the stator, along with a plate for improved heat dissipation and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If motor control electronics are accommodated in a sealed electronics housing directly adjoining the motor structure, then the electronics are protected from the medium delivered by the fan, but replacement of the electronics in service is either not possible or requires considerable assembling effort
Solution Approach 1:
The housing is divided into a first housing part containing the motor and a second housing part containing the electronics, which can be separated from each other. This segmentation allows the electronics to be accessed and replaced independently while the motor remains in place, resolving the contradiction between protection and ease of repair.
Solution Approach 2:
The electronics are nested within the second housing part that can be integrated into or separated from the first housing part. This nested structure allows the electronics to be protected when assembled while enabling easy removal and replacement by separating the housing parts.
2Reliability
If a sealed electronics housing is used to protect electronics from the medium delivered by the fan, then the electronics are protected, but the options for cooling the motor control electronics are very limited
Solution Approach 1:
The housing configuration is made dynamic, allowing the second housing part containing the electronics to be separated from the first housing part. This dynamic structure enables cooling options during operation while maintaining protection when assembled, resolving the contradiction between protection and cooling capability.
3Reliability
If motor control electronics are accommodated in a sealed electronics housing directly inserted between the motor and motor control electronics, then the electronics are protected, but more space is required inside the fan housing
Solution Approach 1:
The housing parts are designed to connect in a manner that optimizes space utilization. The second housing part can be positioned to utilize available space efficiently, reducing the axial installation space requirement while maintaining protection for the electronics.
4Ease of manufacture
If stators press-coated with synthetic material are used, then they are favorable for application, but they can only be produced in small installation sizes with relatively small diameter, which limits the size of the circuit board for electronics
Solution Approach 1:
By separating the electronics into a distinct second housing part, the design decouples the stator size constraints from the electronics size requirements. This allows the use of press-coated stators for ease of manufacture while providing sufficient space in the separate housing part for larger circuit boards with more electronic components.
Data Source
AI summary
A fan includes a fan housing and a motor accommodated therein. The motor has a stator and a rotor, which is connected to a fan wheel. The fan housing consists of at least a housing upper part and a housing lower part. The housing upper part has an axial opening on the axial inner face of which facing the housing lower part the stator is arranged. On the axial outer face of the axial opening at least electronics are arranged.