Permanent Magnetic Actuator for Automatic Transfer Switch
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Solution Overview
Problem
Traditional automatic transfer switches with solenoid or motor operating mechanisms are prone to reduced reliability and complexity due to their intricate structures, and existing permanent magnetic mechanisms can misoperate in medium-voltage vacuum circuit breakers.
Innovation Solution
An automatic transfer switch design utilizing a permanent magnetic actuator with independent energization of its ends, connected via a link rod and oscillating rods, allowing for bistable or monostable operation to position movable contacts relative to a fixed contact, eliminating the need for traditional mechanical locking and tripping devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solenoid or motor operating mechanisms are used, then the automatic transfer switch can perform opening and closing operations, but the structure becomes complicated and reliability is reduced
Solution Approach 1:
The patent replaces traditional solenoid or motor operating mechanisms with a permanent magnetic operating mechanism that uses magnetic fields instead of complex mechanical components. The permanent magnetic actuator utilizes magnetic attraction and repulsion forces to drive the oscillating rods and movable contacts, eliminating the need for complicated mechanical locking and tripping components while improving reliability and consistency.
Solution Approach 2:
The patent extracts and removes the unnecessary mechanical locking and tripping components from the operating mechanism. By using permanent magnetic forces to directly actuate the oscillating rods and movable contacts, the design eliminates redundant mechanical elements that previously reduced reliability, achieving a simpler and more reliable structure.
2Ease of manufacture
If traditional mechanical locking and tripping components are included, then the opening and closing states can be maintained, but the number of components increases and manufacturing precision requirements increase
Solution Approach 1:
The patent replaces mechanical locking and tripping components with a permanent magnetic operating mechanism that uses magnetic fields to maintain and change states. The permanent magnetic actuator drives the oscillating rods through magnetic forces, eliminating the need for multiple mechanical components and reducing manufacturing complexity while maintaining state stability.
Solution Approach 2:
The permanent magnetic operating mechanism is self-contained and uses inherent magnetic properties to maintain operating states without requiring additional mechanical locking components. The magnetic forces naturally maintain the position of the oscillating rods and movable contacts, eliminating the need for separate locking and tripping devices.
3Reliability
If existing permanent magnetic operating mechanisms are used in medium-voltage vacuum circuit breakers, then the operation can be simplified, but misoperation can occur
Solution Approach 1:
The patent segments the permanent magnetic operating mechanism into two independent ends (first end and second end) that can be energized independently. This segmentation allows precise control of each end's magnetic forces, preventing unintended interaction that could cause misoperation while maintaining the simplicity of permanent magnetic actuation. The independent energization ensures operational consistency.
Solution Approach 2:
The patent controls the magnetic field parameters by independently energizing the first and second ends of the permanent magnetic actuator. By adjusting the energization parameters of each end separately, the system achieves precise control over the magnetic forces applied to the oscillating rods, preventing misoperation while maintaining operational simplicity.
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 enhances reliability and extends the lifetime of automatic transfer switches while reducing manufacturing complexity, ensuring precise and consistent operation by leveraging permanent magnetic forces for contact positioning and switching states.
Implementation Method 1
The permanent magnetic actuator comprises a first end and a second end communicatively and operatively connected to the link rod via a third oscillating rod. The first end is energized independently of the second end. The automatic transfer switch is operable to position the guide plate based at least on a permanent magnetic force applied to the first end or the second end of the permanent magnetic actuator.
Implementation Method 2
At least one of the first movable contact and the second movable contact is positioned away from fixed contact, for example during service. The permanent magnetic actuator exerts a permanent magnetic holding force.
Data Source
AI summary
A system and method for an automatic transfer switch comprising a fixed contact (26), a first oscillating rod (16) communicatively and operatively connected to a first movable contact (25), a second oscillating rod (18) communicatively and operatively connected to a second movable contact (27), a link rod (12) communicatively and operable connected to the first and second oscillating rods (16, 18), a guide plate (20), and a permanent magnetic actuator (2) comprising a first end and a second end communicatively and operatively connected to the link rod (12) via a third oscillating rod (8), wherein the first end being energized independently of the second end. The automatic transfer switch is operable to position the guide plate (20) based at least on a permanent magnetic force applied to the first end or the second end of the permanent magnetic actuator.