Inter-turn short circuit is an electrical fault that may occur during the production, processing and application of any motor winding. When an inter-turn short circuit fault occurs, can it be repaired and what measures should be taken?
The winding and embedding of motor windings may have adverse effects on the insulation layer of electromagnetic wires. Whether it is enameled electromagnetic wire or mica wire wrapped wire used in forming windings, it is difficult to avoid such problems. The molding process of the molded winding also has a great impact on the quality of the electromagnetic wire insulation layer. When the mold is inappropriate and the winding shape design is unreasonable, it will lead to serious insulation damage problems during the molding process, which is a potential quality hazard for inter-turn short circuit problems.
When similar problems occur in the winding before dipping in paint, necessary insulation remedial measures can be taken to isolate and protect the damaged electromagnetic wires; during the winding insulation treatment process, insulating paint can play a certain role in strengthening the insulation between turns. It turns out that The insulation performance of the injured electromagnetic wire may fully meet the insulation performance requirements of the motor; however, if the insulation effect is not very obvious, it will inevitably lead to electrical quality failures during the operation of the motor, that is, inter-turn short circuit problems during operation.
In comparison, the inter-turn short circuit problem that occurs in the winding before the motor is running is mostly discovered through the inter-turn insulation tester, and there is still an opportunity to take some effective remedial measures; when the winding short circuit occurs during the complete machine test or operation of the motor malfunction with little possibility of repair.
When an inter-turn short circuit fault occurs during the operation of the motor, the fault is manifested as a multi-turn insulation problem, and some even affect the entire coil. More serious effects will be on the phase-to-phase insulation and the ground insulation. That is, the inter-turn short circuit fault has Larger derivative effects, and the degree of inter-turn fault will be more serious. The insulation layer of the electromagnetic wire is almost in a peeling state, so the entire winding must be replaced.
Therefore, many motor manufacturers attach great importance to the winding processing technology, try their best to reduce and eliminate the hidden dangers of insulation faults, and fundamentally improve the electrical performance level of the motor.
Post time: Dec-19-2024