Electric Machine Enclosure with Compartmentalized EMI Shielding and Cooling
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Solution Overview
Problem
Existing electric machine enclosures lack effective cooling and electromagnetic interference (EMI) shielding, leading to inefficient heat dissipation and potential damage from EMI, which complicates maintenance and component replacement.
Innovation Solution
An enclosure with compartments for field wiring and drive electronics, featuring a fan for air flow through heat sink fins and EMI shielding between compartments, along with removable covers for easy access and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If existing electric machine enclosures are used, then the structure is simple, but heat dissipation is inefficient and EMI shielding is lacking
Solution Approach 1:
The enclosure is divided into multiple compartments (first compartment for field wiring, second compartment for drive electronics, third compartment for heat dissipation) to separate different functional requirements. This segmentation allows each compartment to be optimized independently for its specific function while maintaining overall structural integrity.
Solution Approach 2:
The patent implements nested compartments within the enclosure structure, where the first, second, and third compartments are arranged in a nested configuration. The EMI shield is positioned within the enclosure to provide shielding between compartments, creating a nested protective structure that enhances both EMI protection and heat dissipation without significantly increasing external dimensions.
2Object-affected harmful factors
If existing electric machine enclosures are used, then the structure is simple, but EMI shielding is insufficient
Solution Approach 1:
The enclosure is segmented into electrically isolated compartments separated by an EMI shield. The first compartment houses field wiring terminals, the second compartment contains drive electronics, and the EMI shield positioned between them provides electromagnetic isolation. This segmentation prevents electromagnetic interference from affecting sensitive components while maintaining a relatively simple overall enclosure design.
3Object-affected harmful factors
If components are enclosed in a sealed manner, then protection from EMI and environment is improved, but maintenance and component replacement become difficult
Solution Approach 1:
The enclosure incorporates removable covers that can be dynamically opened and closed to provide access to the first and second compartments. This dynamic feature allows the enclosure to transition between a sealed protective state during operation and an accessible state during maintenance, combining the benefits of both sealed protection and easy maintenance without compromising either function.
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
Enhances heat dissipation and shields against EMI, facilitating easy maintenance and component replacement by directing airflow through heat sink fins and providing compartmentalized protection from environmental interference.
Implementation Method 1
a fan is coupled to the rotor and directs a flow of air through the second compartment
Implementation Method 2
an electromagnetic interference (EMI) shield
Data Source
AI summary
An electric machine includes a stator, a rotor positioned adjacent the stator and rotatable with respect to the stator, and a housing that at least partially surrounds the stator. An enclosure is coupled to the housing and includes a first compartment and a second compartment. A plurality of fins are positioned within the second compartment and a fan is coupled to the rotor and directs a flow of air through the second compartment.