Ceiling Fan Sensor Fixing Structure Using Magnetic Pole Spacer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The installation of conventional ceiling fan motors with built-in sensors is complex, often resulting in assembly errors and noise due to friction between interrupting plates and photo interrupters, and the numerous components on the circuit board reduce reliability.
Innovation Solution
A fixing structure for the ceiling fan sensor featuring a motor axle, stator, and rotor with sensing magnets, where a supporting base with pinching arms securely holds the sensor, allowing for easy assembly and precise positioning within a magnetic pole spacer, reducing sensing errors and improving stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interrupting plates and photo interrupters are used in the conventional ceiling fan motor, then the sensor function is achieved, but the assembly becomes complicated and produces noise due to friction
Solution Approach 1:
The patent extracts the photo interrupter from the narrow space inside the motor and relocates it to the outer periphery of the stator. This extraction eliminates the need for interrupting plates and complex positioning mechanisms, simplifying the assembly process while maintaining the sensor's detection function. The sensor now detects magnet positions from the outside rather than from within the confined motor interior.
Solution Approach 2:
The patent introduces a magnetic pole spacer as an intermediary structure that houses the sensor. This spacer serves as a mediator between the stator and the sensor, providing a stable mounting position and ensuring precise alignment with the rotating magnets. The magnetic pole spacer eliminates the need for complex positioning mechanisms while maintaining accurate detection.
2Reliability
If the photo interrupter is installed in the narrow space inside the ceiling fan motor, then the sensor function is achieved, but assembly errors cause friction and noise between interrupting plates and photo interrupter
Solution Approach 1:
The sensor is extracted from the narrow internal space and positioned on the outer periphery of the stator. This eliminates the assembly difficulties caused by limited space, allowing for easier installation and adjustment while maintaining detection accuracy. The sensor can now be properly positioned without risk of friction with interrupting plates.
Solution Approach 2:
The magnetic pole spacer acts as an intermediary that ensures precise positioning of the sensor relative to the rotating magnets. It provides a stable mounting structure that eliminates assembly errors and prevents friction between components, while maintaining accurate detection of magnet positions.
3Device complexity
If Hall sensor and magnet are used in usual ceiling fan motors, then the sensor function is achieved, but the invention replaces them with interrupting plates to simplify structure
Solution Approach 1:
The patent replaces the mechanical interrupting plate system with an optical detection system using a sensor and magnets. This substitution eliminates the need for physical interrupting plates that cause friction and noise, while maintaining the sensing function. The optical system is simpler in operation though requires precise positioning, which is achieved through the magnetic pole spacer.
4Reliability
If numerous elements are placed on the circuit board to achieve sensor function, then the sensing capability is improved, but the reliability of the ceiling fan motor decreases
Solution Approach 1:
The patent extracts the sensor from the crowded circuit board environment and positions it on the magnetic pole spacer. This extraction reduces the number of elements on the circuit board, lowering complexity and improving reliability. The sensor maintains its detection capability while being positioned in a less congested area with better access for assembly and maintenance.
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 solution simplifies the assembly process, reduces sensing errors, and enhances the operational stability of the ceiling fan motor by effectively using the existing stator and rotor structure, while maintaining cost-effectiveness and reliability.
Implementation Method 1
The sensor is correspondingly embedded in the supporting base composed of the two pinching arms for sensing the positions of the sensing magnets on the rotor
Data Source
AI summary
A fixing structure for the sensor of a ceiling fan is disclosed. The stator of the ceiling fan has several coil arms in equal spacing for field coils to wind around. A magnetic pole spacer is formed between each adjacent two coil arms. The magnetic pole spacer has a supporting base for the disposition of a sensor to sense the position of the rotor.