DC Relay Contact Structure for Electromagnetic Separation Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing DC relays face issues with arbitrary separation of movable contacts during up and down movement, incomplete cancellation of electromagnetic forces, and lack of measures to prevent separation, leading to malfunction or failure in maintaining a stable contact state.
Innovation Solution
A DC relay structure incorporating an upper yoke and a lower yoke to cancel electromagnetic repulsive forces, a pin member and support member for stable coupling, and a coupling protrusion for secure engagement without additional coupling members, ensuring stable contact and preventing arbitrary separation of the movable contactor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the movable contactor is moved up and down during operation, then the electrical connection can be made or disconnected, but the movable contactor may arbitrarily separate from the fixed contactor due to electromagnetic repulsive force
Solution Approach 1:
The patent introduces an upper yoke and lower yoke that generate electromagnetic attractive force to counteract the harmful electromagnetic repulsive force between the movable contactor and fixed contactor. By converting the harmful repulsive force into a beneficial attractive force through the yoke structure, the system maintains stable contact during operation.
Solution Approach 2:
The upper yoke and lower yoke act as counterbalancing elements that generate opposing electromagnetic attractive force to neutralize the electromagnetic repulsive force. This counterforce prevents the movable contactor from arbitrarily separating, similar to how counterweight balances gravitational force.
2Reliability
If additional coupling members are added to prevent separation, then the stability of contact state improves, but the device complexity increases
Solution Approach 1:
The patent combines the coupling function with the existing yoke structure. The upper yoke and lower yoke serve dual purposes: generating electromagnetic attractive force and providing coupling support. This merging eliminates the need for separate coupling members while maintaining contact stability.
Solution Approach 2:
The yoke structure is designed to perform multiple functions simultaneously: it generates electromagnetic attractive force to counteract repulsive force, provides structural support, and enables stable coupling between components. This multi-functionality reduces the overall number of parts needed in the system.
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 maintains a stable contact state between the movable and fixed contactors by canceling electromagnetic repulsive forces and preventing arbitrary separation, ensuring reliable electrical connection and disconnection.
Implementation Method 1
the upper yoke and the lower yoke may be magnetized to generate electromagnetic attractive force therebetween
Implementation Method 2
an upper yoke located on an upper side of the movable contactor to cancel electromagnetic repulsive force generated between the fixed contactor and the movable contactor
Implementation Method 3
a pin member coupled through the support member to support the movable contactor
Data Source
AI summary
A direct current relay is disclosed. A movable contact part provided on a direct current relay, according to an embodiment of the present disclosure, comprises a movable contact and a pin member that is through-coupled to the movable contact. The movable contact can be supported by the pin member and simultaneously move on a straight line along the pin member. Therefore, even when a physical force is applied to the movable contact, the movable contact does not arbitrarily separate therefrom. The pin member is coupled to a support member insertion-coupled to a housing and an upper yoke. The pin member is formed to have a diameter larger than that of a hollow formed in the support member. The pin member can be insertion-coupled to the support member. Therefore, arbitrary separation of the movable contact can be prevented even without a separate fastening member.