Electric Switch Closing Control for Contact Wear Reduction
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Solution Overview
Problem
Existing electric switches face issues such as excessive wear and mechanical interlock failure due to fluctuations in closing speed, particularly at varying control voltages, which affect the service life and reliability of the switch.
Innovation Solution
A control method and device that adjusts target control parameters like voltage and current based on real-time control voltage, ensuring a stable closing speed by employing different parameters for different voltage ranges, preventing excessive wear and interlock failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the closing speed of the movable contact is increased to improve switching responsiveness, then the switching speed is improved, but excessive wear of the contact point and mechanical interlock failure occur
Solution Approach 1:
The patent applies dynamics by making the control parameters of the electromagnetic assembly adjustable rather than fixed. The control device dynamically adjusts voltage and current based on real-time feedback about the closing process, enabling the system to adapt the closing speed during operation. This resolves the contradiction by allowing high closing speed when needed while preventing excessive wear through active control.
Solution Approach 2:
The patent implements feedback control by monitoring the closing process and using this information to adjust control parameters in real-time. The control device receives feedback about the closing state and modifies voltage and current accordingly, ensuring the closing speed remains within optimal ranges. This feedback mechanism prevents both excessively slow closing and damagingly fast closing, resolving the reliability issue.
2Device complexity
If a fixed control parameter is used for the electromagnetic assembly, then the control system is simple, but the closing speed fluctuates with varying control voltage affecting reliability
Solution Approach 1:
The patent transforms the static control system into a dynamic one by implementing adjustable control parameters. Instead of using fixed voltage and current values, the control device dynamically modifies these parameters based on the actual closing process and control voltage conditions. This dynamic approach maintains reliability across varying voltages while the implementation remains practically simple through standardized control components.
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
Stabilizes closing speed across varying control voltages, preventing wear and mechanical interlock failures, thus enhancing the reliability and longevity of electric switches.
Implementation Method 1
a control voltage input to the electric switch and applied to an electromagnetic assembly of the electric switch
Data Source
AI summary
Embodiments of the present disclosure provide a control method and a control device for an electric switch, and an electric switch. The control method includes: obtaining a voltage signal representing a control voltage, the control voltage input to the electric switch and applied to an electromagnetic assembly of the electric switch via a regulation device of the electric switch; determining, based on the voltage signal obtained, a target control parameter for the electromagnetic assembly, the target control parameter comprising at least one of a target voltage and a target current; and generating, based on the target control parameter determined, a control signal for the regulation device, to cause the electromagnetic assembly to drive a movable contact of the electric switch to contact a static contact of the electric switch. The solution of the present disclosure can effectively reduce wear of contact points of contacts, to thus prolong the service life of the electric switch.