Tap Changer Electric Operator With Encoder Feedback Control
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Solution Overview
Problem
Conventional electric operators for tap changers have complex mechanical configurations, requiring many components and skilled personnel for assembly and maintenance, and lack effective use of position information for operation control.
Innovation Solution
An electric operator for tap changers utilizing a driver, multi-rotation type encoder, and controller, which enables electronic control of a motor to perform tap changing with improved position detection and monitoring, reducing mechanical components and simplifying assembly and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a mechanical step control mechanism and dial switch are used for tap changing control, then position information can be obtained, but the number of components increases and assembly and maintenance become complex
Solution Approach 1:
The patent replaces the mechanical step control mechanism and dial switch with an electronic control system using a microcomputer and encoder. The encoder detects the rotation angle of the drive shaft electronically, eliminating the need for mechanical position detection components. This substitution reduces the number of parts while maintaining accurate position information detection capability.
2Ease of operation
If a mechanical step control mechanism is used, then tap position control can be achieved, but skilled personnel are required for assembly and maintenance
Solution Approach 1:
By replacing the mechanical control system with an electronic control system using a microcomputer, the patent simplifies the control logic to software-based operations. This electronic system is easier to diagnose and repair as it eliminates complex mechanical linkages and requires fewer specialized mechanical skills for maintenance.
Solution Approach 2:
The electronic control system with encoder feedback provides self-diagnosis capabilities and automated control, reducing the need for skilled personnel intervention during routine maintenance and operation.
3Measurement precision
If a dial switch is used for position detection, then limit information can be obtained, but the signal is not effectively used in operation control
Solution Approach 1:
The patent implements a feedback control system where the encoder continuously provides position information to the microcomputer, which automatically adjusts the motor drive based on the detected tap position. This closed-loop feedback enables effective use of position data for automated control, eliminating the need for manual interpretation of limit signals.
Solution Approach 2:
Replacing the dial switch with an encoder provides continuous digital position signals that can be directly processed by the microcomputer for automated control decisions, enhancing the extent of automation in operation control.
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
Simplifies assembly and maintenance by reducing mechanical components, enhances position detection accuracy, and improves motor stop accuracy through electronic control, detecting abnormalities like tap congestion and runaway states.
Implementation Method 1
The multi-rotation type encoder has a member which rotates n times with respect to one rotation of the main drive shaft and detects a rotation position of the main drive shaft by detecting a rotation position of the member.
Data Source
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AI summary
An electric operator for a tap changer according to an embodiment includes a drive unit, a multi-turn encoder, a monitor unit, and a control unit. The drive unit drives a main shaft via a motor to change a tap in a tap changer. The multi-turn encoder has a member that rotates n times the rotation of the main shaft, and detects the rotational position of the member to thereby detect the rotational position of the main shaft. The monitor unit monitors the state of the tap changer on the basis of the rotational position detected by the multi-turn encoder. The control unit controls the drive unit on the basis of the monitoring results from the monitor unit.