Conductor Segment Insulation Testing with Capacitive Pre-Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for testing insulation of conductor segments in large-scale industrial manufacture are limited by low maximum speeds for reliable defect detection, leading to inefficient production cycles.
Innovation Solution
A test method and device that includes capacitive charging of conductor segments before scanning with a test contact, using potential equalization elements to apply a higher voltage for capacitive charging, allowing reliable defect detection at higher speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional insulation testing methods are used, then defect detection is reliable, but production speed is limited to low maximum speeds
Solution Approach 1:
The conductor segment is capacitively charged before the actual insulation testing begins. This preliminary charging action prepares the conductor segment in advance, allowing the subsequent defect detection to proceed at higher speeds while maintaining reliability. The charging process ensures that the conductor segment is in the appropriate electrical state for accurate defect detection without requiring slow testing speeds.
2Speed
If higher voltage is applied for capacitive charging, then defect detection at higher speeds becomes possible, but the complexity of the test device increases
Solution Approach 1:
A potential equalization element is introduced as an intermediary component between the voltage source and the conductor segment. This intermediary element facilitates the capacitive charging process and enables higher voltage application without directly increasing the complexity of the main test device. The potential equalization element acts as a mediator that simplifies the overall system architecture while achieving the desired high-speed testing capability.
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
Enables reliable insulation testing at higher production speeds, reducing cycle times and improving safety in the manufacture of electrical machine components.
Implementation Method 1
checking whether an electrical connection exists between the test connection and the test contact during step c) in order to detect a defect in the insulation
Implementation Method 2
capacitively charging the conductor segment. In some embodiments, step b) comprises the step: b1) applying an electrical field ahead of the test contact in the direction of movement
Data Source
AI summary
A method for testing an insulation of a conductor segment for an electrical machine for defects by: a) electrically connecting a conductor segment connection of the conductor segment to a test connection; b) capacitive charging of the conductor segment; c) relatively moving the conductor segment and a test contact in order to scan the area to be tested of the insulation with the test contact, and d) checking whether an electrical connection exists between the test connection and the test contact during step c) in order to conclude that there is a defect in the insulation. Step b) occurs before or during step c). Also a device for performing such a test method.