Embedded Ground Pin Stator Core Grounding for Vibration Stability
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Solution Overview
Problem
Existing motor stator grounding methods, such as wire welding, are prone to failure due to vibrations and complicate the assembly process, particularly in applications like blowers where electromagnetic compatibility is crucial.
Innovation Solution
A motor design featuring a ground pin partially embedded in the stator core for reliable electrical connection to both the stator core and the housing, ensuring stable grounding even under operational vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wire welding is used to ground the stator core, then electromagnetic compatibility is achieved, but the grounding is prone to failure due to vibrations and the assembly process becomes complicated
Solution Approach 1:
The patent replaces the mechanical wire welding process with a embedded ground pin structure. The ground pin is directly embedded into the stator core during manufacturing, eliminating the need for separate welding operations. This substitution of the mechanical connection method resolves the contradiction by providing both reliable vibration-resistant grounding and simplified assembly.
Solution Approach 2:
The ground pin is pre-installed and embedded into the stator core before final assembly. This preliminary action ensures that the grounding connection is established in advance, avoiding the need for complex welding operations during assembly and ensuring reliable grounding from the outset.
2Reliability
If wire welding is used to ground the stator core, then electromagnetic compatibility is achieved, but the grounding connection fails under violent vibrations
Solution Approach 1:
The patent replaces the vulnerable wire welding connection with a robust embedded ground pin structure. The ground pin is physically embedded into the stator core, creating a mechanical interlock that can withstand violent vibrations. This mechanical substitution eliminates the harmful effect of vibrations on grounding stability.
Solution Approach 2:
The ground pin merges the grounding function with the structural integrity of the stator core. By embedding the pin directly into the core, the grounding connection becomes an integral part of the motor structure, ensuring that vibrations affecting the motor also strengthen rather than weaken the grounding connection.
3Ease of manufacture
If wire welding is used for stator grounding, then electrical connection is achieved, but the assembly process is disadvantageous and time-consuming
Solution Approach 1:
The ground pin is pre-installed into the stator core during the manufacturing process before final assembly. This preliminary action allows the grounding connection to be established in advance, eliminating the need for time-consuming welding operations during assembly and significantly reducing assembly time.
Solution Approach 2:
The patent replaces the complex wire welding process with a simple embedded pin structure that can be installed using basic mechanical operations. This substitution dramatically simplifies the manufacturing process and reduces the time required to implement grounding.
Data Source
AI summary
A motor that includes a stator having a stator core; a rotor; and a ground pin for at least achieving a ground connection of the stator core; the ground pin is configured to be electrically connected to the stator core by being partially embedded in the stator core.