Integrated Contactor Structure for Automatic Over-Current Cutoff
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Solution Overview
Problem
Existing contactors cannot autonomously perform power cutoff in over-current situations.
Innovation Solution
An intelligent contactor with a current splitter, electromagnetic system, and circuit board that automatically disconnects based on current values, featuring a partitioned structure for the current splitter and circuit board within the contactor body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a contactor is used as a simple electromagnetic switch, then the structure is simple, but it cannot autonomously perform power cutoff in case of over-current abnormal state
Solution Approach 1:
The patent combines the current splitter, circuit board, and electromagnetic system into a single integrated contactor body. The current splitter measures current directly within the contactor, the circuit board processes the current signal and controls the electromagnetic system, eliminating the need for external separate components and wires while achieving autonomous over-current protection
Solution Approach 2:
The contactor body serves multiple functions: it houses the electromagnetic system for switching, contains the current splitter for measurement, and includes the circuit board for control logic. This multi-functional integration enables both switching and autonomous over-current protection capabilities within a single device
2Reliability
If additional components are added to enable over-current protection, then the protection capability is improved, but the structure becomes complex and requires additional wires
Solution Approach 1:
The current splitter, circuit board, and electromagnetic system are merged into a single integrated unit within the contactor body. This eliminates the need for separate external components and complex wiring connections, making installation simpler while maintaining comprehensive over-current protection capability
Solution Approach 2:
The contactor performs self-diagnosis and self-protection through the integrated current splitter and circuit board. The system automatically detects over-current conditions and triggers the electromagnetic system to cut off power without requiring external control or additional wiring, enabling autonomous protection operation
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
Enables automatic over-current cutoff, protecting the load circuit by controlling the electromagnetic system based on current measurements, with a simplified structure and enhanced protection against foreign matter entry.
Implementation Method 1
an electromagnetic system for controlling one end of the current splitter to be connected or disconnected with the first conductive piece
Data Source
AI summary
An intelligent contactor is provided which comprises a contactor body, and the contactor body is provided with a first conductive piece and a second conductive piece partially protruding out of the contactor body. A current splitter for measuring a current flowing through the first conductive piece and the second conductive piece is arranged inside the contactor body; an electromagnetic system for controlling one end of the current splitter and a circuit board for controlling the electromagnetic system. The other end of the current splitter is electrically connected to the second conductive piece. A partition plate is vertically and fixedly connected inside the contactor body, and the partition plate is used to partition the interior of the contactor body into a first accommodation chamber and a second accommodating chamber to address the problem of inability of a contactor in the prior arts to perform power cutoff for an over-current case.