What problems in the manufacturing process of high voltage motors can lead to partial discharge

High Voltage AC Motor

In recent industry evaluations, engineers and quality experts have raised growing concerns about the impact of manufacturing defects on the performance of high voltage motors. At the forefront of this investigation, XIAN Lite Simo motors has identified several critical areas in the production process that could contribute to the occurrence of partial discharge—a phenomenon that, if left unchecked, can lead to insulation degradation and motor failure.

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Partial discharge typically originates from flaws within the motor’s insulation system. One of the most common culprits is the presence of air voids or microgaps in the stator windings, caused by incomplete vacuum pressure impregnation (VPI) during the resin application stage. These gaps can allow partial discharges to initiate under high voltage stress, progressively damaging the insulation materials from within. Contaminants such as dust, moisture, or foreign particles introduced during winding or assembly can further amplify this risk, acting as discharge initiators.

Another contributing factor is inconsistent coil positioning during stator assembly. Even slight misalignment can concentrate the electric field in specific areas, creating localized stress points that accelerate the onset of partial discharge. Moreover, improper thermal curing of insulation materials may result in uneven dielectric strength, leaving certain zones more vulnerable to electrical stress. Variations in the curing cycle or temperature profiles during baking can compromise the overall mechanical and electrical integrity of the motor.

XIAN Lite Simo motors has taken proactive steps to mitigate these issues by implementing automated insulation systems, advanced quality control protocols, and enhanced environmental cleanliness in production zones. By aligning its processes with global standards such as IEC 60034 and using high-grade materials from certified suppliers, the brand reinforces its commitment to reliability and long-term performance in high voltage motors.

As the demand for dependable power solutions grows across industrial and energy sectors, addressing the root causes of partial discharge in manufacturing is no longer optional—it is essential. With continuous investment in process innovation and testing technologies, XIAN Lite Simo otors remains a trusted leader in delivering high voltage motors engineered for durability and operational excellence.

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