Contactor Interlocking Module for Inverter Systems
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Solution Overview
Problem
Conventional electrical interlocks between contactors require manual wiring, which is time-consuming and prone to errors, necessitating a quicker and more reliable method for achieving electrical interlocking.
Innovation Solution
An electrical connection module with normally closed auxiliary contacts and connection terminals that connect two contactors without manual wiring, ensuring that one contactor cannot be closed simultaneously with the other by using elastic and rigid portions for secure engagement and actuation by the contactors' sliders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual wiring is used to achieve electrical interlocking between contactors, then the interlocking can be implemented, but the process is time-consuming and prone to wiring errors
Solution Approach 1:
The patent introduces an intermediary module that pre-contains the interlocking circuitry and connection terminals. This module acts as a mediator between the contactors, eliminating the need for manual wiring between them. The module's pre-configured connection terminals and interlocking circuitry ensure accurate electrical connections while significantly reducing installation time, as the module can be quickly mounted onto the contactors without complex manual wiring operations.
2Ease of manufacture
If manual wiring is used to connect contactors for interlocking, then the connection can be established, but wiring errors are possible and the process is complex
Solution Approach 1:
The patent applies preliminary action by pre-configuring the interlocking circuitry and connection terminals within the module during manufacturing. The module arrives pre-assembled with the correct electrical connections already established, eliminating the need for complex manual wiring operations during installation. This preliminary preparation ensures connection reliability while greatly simplifying the assembly process, as installers only need to mount the module onto the contactors rather than perform complex wiring tasks.
3Loss of time
If a removable module is used to connect contactors, then manual wiring is eliminated and installation is quicker, but the module requires secure engagement with the contactors
Solution Approach 1:
The patent segments the interlocking system into separate modular components: the removable module and the contactor units. This segmentation allows the module to be independently manufactured and tested, then quickly mounted onto the contactors. The modular design maintains strong connections through dedicated mounting interfaces while enabling rapid installation and replacement, resolving the contradiction between quick installation and connection strength.
Data Source
Figure 1~2
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AI summary
The module (10) has two closed auxiliary contacts (25, 26) respectively cooperating with a slide of two contactors (1', 1''). Two connecting terminals cooperate with an outer circuit for supplying power to two coils. Two connecting elements (22, 23) respectively cooperate with a connecting unit of the two contactors and are positioned on a face of a body at two parts of the module, respectively. The parts are arranged on a front face of the two contactors, respectively. An independent claim is also included for an inverter arrangement comprising an insulating body.