Connector Partition Walls Prevent Arc Propagation
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Solution Overview
Problem
Existing connectors for permanent magnet motors lack separate electromagnetic shielding for three-phase windings, leading to mutual interference and potential short circuits, and are prone to arc damage when an arc occurs, compromising motor safety and connected equipment.
Innovation Solution
A connector design featuring a shielding shell with partition walls to create separate insertion cavities for each terminal, along with sealing and cable management features to prevent interference and arc flow, ensuring correct mating and secure electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If three terminals are located in the same accommodation cavity without separation, then the connector structure is simple, but mutual interference and short circuits occur between terminals
Solution Approach 1:
The single accommodation cavity is segmented into three separate insertion cavities using partition walls, with each terminal housed in its own cavity. This segmentation provides electromagnetic shielding between terminals, preventing mutual interference and short circuits while maintaining a relatively simple overall connector structure.
2Reliability
If a single accommodation cavity is used for all terminals, then manufacturing is easier, but electromagnetic shielding protection is insufficient
Solution Approach 1:
The shielding shell is divided into multiple insertion cavities by partition walls, creating separate electromagnetic shielding environments for each terminal. This segmented approach provides adequate electromagnetic shielding protection while maintaining manufacturing feasibility through a modular design that can be produced using standard manufacturing processes.
3Object-affected harmful factors
If terminals are not separated by electromagnetic shielding, then the connector structure is simpler, but arc damage can propagate to connected equipment
Solution Approach 1:
Partition walls create separate insertion cavities that act as electromagnetic shielding barriers between terminals. If an arc occurs at one terminal, the partition walls confine the arc within its own cavity, preventing arc damage from propagating to other terminals and connected equipment, while the overall structure remains relatively simple.
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 effectively prevents mutual interference and short circuits between terminals, and prevents arcs from damaging the motor or connected equipment, enhancing the safety and reliability of the electrical connections.
Implementation Method 1
The two first partition walls separate an internal space enclosed by the first outer wall into three first insertion cavities electromagnetically separated from each other
Implementation Method 2
when the permanent magnet motor generates an arc, the arc is easy to flow through the connector, which will cause damage to the converter and other equipment connected to the connector
Data Source
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AI summary
A connector, a mating connector and a connector assembly are disclosed. A connector comprises a first shielding shell (100), three first insulators (200) and three first terminals (300). The first shielding shell (100) comprises a first outer wall and two first partition walls (140). The two first partition walls (140) separate an internal space enclosed by the first outer wall into three first insertion cavities (101) electromagnetically separated from each other. The three first insulators (200) are respectively inserted into three first insertion cavities (101) of the first shielding shell (100). The three first terminals (300) are respectively inserted into the three first insulators (200) for electrical connection with three-phase windings (U, V, W) of a permanent magnet motor (M). In the above-mentioned exemplary embodiments according to the present invention, three insertion cavities separated from each other are formed in the shielding shell, and the three terminals are respectively accommodated in the three insertion cavities, so that mutual interference or even short circuit between the three terminals can be avoided, and the arc can be prevented from flowing through the connector, ensuring the safety of the permanent magnet motor and related electrical equipment connected to the terminals.