Permanent Magnet Actuator for Automatic Transfer Switch Reliability
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Solution Overview
Problem
Automatic transfer switches (ATS) have complex designs with numerous parts, leading to reliability issues and shortened life cycles due to constrained mechanical structures that impair driving force and increase misoperation risks, particularly in high current applications.
Innovation Solution
The implementation of a permanent magnetic actuator system with a solenoid that controls movable contact members, eliminating the need for traditional mechanical locking and tripping devices, and utilizing a permanent magnetic holding force to maintain contact states, thereby reducing complexity and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional solenoid or motor operating mechanisms with exclusive locking and tripping devices are used, then the ATS can maintain opening and closing states, but the device complexity increases and reliability decreases
Solution Approach 1:
The patent extracts and eliminates the complex exclusive locking and tripping devices from the traditional ATS actuator system. By removing these unnecessary components, the design achieves state maintenance through a simpler permanent magnet mechanism, directly reducing device complexity while improving reliability.
Solution Approach 2:
The patent replaces traditional mechanical locking and tripping devices with a permanent magnet-based actuator system. This substitution eliminates complex mechanical interactions and replaces them with a more reliable magnetic field-based mechanism that inherently maintains operational states without additional locking components.
2Reliability
If conventional mechanical structures are used to control contact members, then the ATS can achieve opening and closing operations, but the driving force is impaired and misoperation risks increase
Solution Approach 1:
The patent replaces conventional mechanical control structures with a permanent magnet actuator system that uses magnetic fields to control contact members. This substitution provides stronger and more reliable driving force while eliminating mechanical friction and wear that cause misoperations in traditional systems.
Solution Approach 2:
The patent changes the fundamental operating parameter from mechanical force transmission to magnetic field interaction. By utilizing magnetic field strength and polarity changes instead of mechanical linkages, the system achieves superior driving force and operational stability without the limitations of conventional mechanical structures.
3Ease of manufacture
If numerous parts and complex constructions are used in ATS design, then the contactor can perform switching functions, but the manufacturing complexity increases and assembly time extends
Solution Approach 1:
The patent merges multiple separate components into an integrated permanent magnet actuator assembly. By combining the magnet, armature, and linkage mechanisms into a unified structure, the design reduces the total number of parts while maintaining full switching functionality, directly improving ease of manufacture and reducing assembly time.
Solution Approach 2:
The permanent magnet actuator is designed to perform multiple functions simultaneously - it provides both the driving force for contactor operation and the holding force to maintain operational states. This multi-functionality eliminates the need for separate locking and tripping devices, simplifying the overall construction while maintaining comprehensive switching capabilities.
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 enhances the reliability and longevity of ATS systems, reduces manufacturing complexity, and minimizes misoperation risks, resulting in improved performance and extended product life cycles.
Implementation Method 1
generate a holding force so as to maintain a state of the at least one first movable contact member at the first location and a state of the at least one second movable contact member at the second location
Data Source
AI summary
An automatic transfer switch system includes a contact subsystem having a plurality of movable contact members, including at least one first movable contact member and at least one second movable contact member at first and second locations, respectively, and at least one fixed contact member. The switch system further includes a permanent magnet operating mechanism that controls opening and closing of the movable contact members relative to the fixed contact member, generates a holding force to maintain a state of the at least one first movable contact member at the first location and a state of the at least one second movable contact member at the second location, and connects to the subsystem via a linkage, and a solenoid permitting movement of the at least one first movable contact member and the at least one second movable contact member at the first and second locations, respectively.