Motor Base with Metallic Induction Member for Easy Starting
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Solution Overview
Problem
Existing miniaturized motors face issues with structural strength due to recesses for sensing plates, which can lead to disengagement and inadequate electromagnetic shielding, causing unstable electronic device operations.
Innovation Solution
A motor base formed by a plastic member wrapped with a metallic induction member via molding, incorporating magnetic attraction portions to prevent rotor stoppage and provide effective electromagnetic shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If recesses are arranged in the base to receive sensing plates, then the motor can be started easily through sensing plates, but the base has smaller thickness where recesses are arranged, affecting the overall structural strength of the base
Solution Approach 1:
The sensing plates are nested within recesses of the base, with positioning posts integrated into the base structure to hold the sensing plates securely. This nesting arrangement allows the sensing plates to be received within the base without requiring external mounting structures, maintaining compact design while ensuring proper positioning for easy motor starting.
Solution Approach 2:
The base is constructed using composite material comprising a plastic member and a metallic induction member wrapped with the plastic member by way of molding. The metallic induction member provides enhanced structural strength and electromagnetic shielding, while the plastic member provides structural support and housing for the recesses and positioning posts, thereby maintaining both ease of operation and structural strength.
2Reliability
If positioning posts are mounted on the base to securely mount the printed circuit board and firmly press sensing plates, then the sensing plates are prevented from disengaging, but the positioning posts are liable to crack or break after long duration of time
Solution Approach 1:
The base uses composite material with a metallic induction member wrapped with a plastic member by way of molding. This composite structure distributes mechanical stresses more evenly across the base, reducing stress concentration on the positioning posts and thereby extending their service life while maintaining secure fixing of the printed circuit board and sensing plates.
Solution Approach 2:
The positioning posts are optimized in terms of material composition, geometric dimensions, and structural configuration. These parameter changes enhance the posts' resistance to cracking and breaking over time, thereby extending their durability while maintaining their function of securely mounting the printed circuit board and firmly pressing the sensing plates.
3Ease of manufacture
If the base is made of plastic material in injection molding, then the manufacturing process is simple, but the base is not able to provide an electromagnetic shielding effect
Solution Approach 1:
The base is constructed using composite material comprising a plastic member and a metallic induction member wrapped with the plastic member by way of molding. The metallic induction member provides effective electromagnetic shielding to block electromagnetic fields, while the plastic member maintains manufacturing simplicity through injection molding. This composite structure simultaneously achieves ease of manufacture and electromagnetic shielding capability.
Solution Approach 2:
The metallic induction member acts as an intermediary layer between the plastic base and the electromagnetic environment. It mediates the electromagnetic field by providing shielding while allowing the plastic member to maintain its manufacturing advantages. The wrapped structure ensures close contact between the metallic induction member and the plastic member, maximizing shielding effectiveness without complicating the manufacturing process.
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 enhances structural strength, ensures easy motor starting, and prevents electromagnetic interference, ensuring stable electronic device operations by securely engaging the metallic induction member and shielding against electromagnetic fields.
Implementation Method 1
The at least one magnetic attraction portion is magnetically attracted by the permanent magnet, to prevent the rotor from stopping at a dead location where it is difficult to start the motor.
Implementation Method 2
the base is able to provide an effective electromagnetic shielding effect via the metallic induction member of the base. Thus, when the motor is installed in an electronic device, the electronic device is immune to electromagnetic interference.
Data Source
AI summary
An easy-to-start motor includes a base, a stator and a rotor. The base has a plastic member and a metallic induction member wrapped with the plastic member. The metallic induction member includes at least one magnetic attraction portion. Each magnetic attraction portion is in the form of a protrusion. The stator is coupled with the base. The rotor has a shaft and a permanent magnet. The shaft is capable of being coupled with the base. The at least one magnetic attraction portion is magnetically attracted by the permanent magnet, to prevent the rotor from stopping at a dead location where it is difficult to start the motor. A base of the easy-to-start motor is adapted to be coupled with a rotor, including a plastic member and a metallic induction member wrapped with the plastic member.