Switch Drive Shaft Position Feedback for Reliable On-Load Operation
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Solution Overview
Problem
Existing drive systems for switches in substations lack operational reliability and flexibility, particularly during on-load operations, where malfunctions can have severe technical and economic consequences.
Innovation Solution
A drive system equipped with a feedback system that determines the position of a drive shaft and generates a feedback signal to control a motor, enhancing position determination accuracy and reliability through the use of encoders and auxiliary contacts, which can be connected directly or indirectly to the switch via gear units, allowing for open-loop or closed-loop control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a feedback system with encoders and auxiliary contacts is added to determine drive shaft position, then position determination accuracy and operational reliability are improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback system that determines the position of the drive shaft using encoders and auxiliary contacts, generating feedback signals that are processed by a control device. This closed-loop feedback mechanism enables accurate position determination and enhances operational reliability by providing real-time position information for monitoring and control purposes.
Solution Approach 2:
The patent introduces auxiliary contacts as intermediary elements that work in conjunction with encoders to provide additional position information. These auxiliary contacts act as mediators between the mechanical drive shaft and the electronic control system, enhancing position determination accuracy without requiring complete redesign of the entire feedback mechanism.
2Measurement precision
If feedback system components (encoders, auxiliary contacts) are added to the drive system, then measurement precision of drive shaft position is improved, but device complexity increases
Solution Approach 1:
The feedback system continuously monitors drive shaft position using encoders and auxiliary contacts, providing precise measurement data to the control device. This enables accurate determination of the drive shaft position at any moment, which is critical for safe and reliable switch operation.
Solution Approach 2:
The patent divides the position measurement function into multiple independent components: encoders for continuous position monitoring and auxiliary contacts for discrete position detection. This segmentation allows each component to specialize in specific measurement aspects, improving overall measurement precision while enabling modular implementation.
Data Source
AI summary
A drive system drives a switch. The drive system includes: a drive shaft connecting the drive system to the switch; a motor configured to drive the drive shaft; a feedback system; and a controller. The feedback system is configured to: determine at least one value for a position of the drive shaft; and generate a feedback signal based on the at least one value. The controller acts on an operation of the motor depending on the feedback signal.