Winding interconnection testing (Neutral Zone)
The winding interconnection testing (Neutral Zone) is a key inspection method for the early detection of errors in the winding process of electrical machines. By identifying wiring errors in good time, costly consequential damage and production downtime can be effectively avoided.
Testing principle and measurement method
The winding interconnection test is based on detecting the magnetic field generated during diametrical resistance or coil resistance measurement in the DUT. A precise sensor detects the magnetic field distribution, enabling a detailed analysis of the winding configuration.
Advantages of the method:
- Early detection of interconnection errors
- Rapid response capability within the production process
- Prevention of high follow-up costs caused by faulty windings
Application for armatures
For armatures, winding interconnection testing enables the detection of the following types of errors:
- Displacement of wires at the commutator: Incorrectly positioned wire connections are reliably detected.
- Displacement of coils on the lamination stack: Deviations in coil positioning become visible.
- Incorrect winding direction: Faulty winding directions are clearly identified.
Application for stators
Neutral zone testing also offers significant advantages for stators:
- Verification of coil winding direction: Ensures correct polarity.
- Inspection of connections with terminals or connection plates: Faulty connections are detected.
- Ensuring the direction of rotation of the magnetic field: The correct direction of rotation is essential for later motor operation.
Advantages of winding interconnection testing
- Automated and quick error detection during ongoing production
- Reduction of rework and scrap costs
- Improvement of product quality and process reliability
- Flexible use with different motor types and winding configurations
Conclusion
Winding interconnection testing is an indispensable tool for quality assurance in the winding process. It enables the early detection of wiring errors, ensures the correct function of electrical machines, and makes a significant contribution to reducing production costs.