HVDC Bypass Switch Magnetic Drive Mechanism
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Solution Overview
Problem
Bypass switches in high voltage direct current (HVDC) transmission systems and static power compensators face challenges in minimizing the size and power of the drive source while ensuring rapid contact between movable and fixed contacts, which is crucial for minimizing the impact of component failures and optimizing space utilization.
Innovation Solution
The bypass switch design incorporates a vacuum interrupter with a movable contact that is rapidly moved to a fixed contact using a drive source, featuring a moving pusher mechanism assisted by a magnet and spring for reliable contact maintenance, and a multi-contactor configuration that simplifies the structure and reduces part count, allowing for efficient assembly and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a drive source is used to move the movable contact to the fixed contact, then the contact reliability is improved, but the size and power of the drive source increases
Solution Approach 1:
The patent replaces the traditional mechanical drive source with a magnetic field-based actuation system. A magnet is positioned to attract the movable contact directly, eliminating the need for complex mechanical drive mechanisms. This substitution reduces the drive source size and power consumption while maintaining contact reliability through controlled magnetic attraction.
Solution Approach 2:
The patent extracts and eliminates unnecessary intermediate components from the drive mechanism. By using direct magnetic attraction between the magnet and movable contact, the system removes intermediate mechanical transmission elements, thereby reducing the overall drive source size and simplifying the structure.
2Device complexity
If a multi-contactor configuration is used, then the device complexity is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent merges multiple contactor functions into a single integrated multi-contactor assembly. The outer body part and contact parts are combined into one component that performs multiple contact functions simultaneously. This merging reduces the total number of separate parts and assembly steps, lowering device complexity while the integrated design ensures consistent manufacturing precision across all contact points.
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
This design minimizes the size and power of the drive source, ensures reliable contact between movable and fixed contacts, enhances the reliability of the bypass switch, and optimizes space utilization by eliminating the need for separate conductive members, thereby improving the overall performance and efficiency of the bypass switch.
Implementation Method 1
a magnet allowing the movable contact to be spaced apart from the fixed contact by applying an attractive force to the latch plate
Implementation Method 2
a spring elastically supporting the latch plate in the direction in which the movable contact and fixed contact are contacted with each other
Data Source
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AI summary
A bypass switch includes: a casing; a vacuum interrupter disposed inside the casing, the vacuum interrupter being disposed such that a movable contact is movable to a fixed contact; a first fixing bus-bar fixed to the casing; a second fixing bus-bar fixed to the casing to be spaced apart from the first fixing bus-bar; a moving pusher connected to the movable contact; a drive source installed in the casing, the drive source pushing the moving pusher to a position at which the movable contact and the fixed contact are contacted with each other; and a multi-contactor disposed to be contacted with the moving pusher. Accordingly, the moving pusher can rapidly contact the movable contact with the fixed contact. Further, the moving pusher can be moved with a small external force. Thus, it is possible to minimize the size of the drive source and the power used in the drive source.