Transformer with improved insulation structure

• Main Author: Raju, Ravisekhar Nadimpalli
• Format: Patent
• Language: English
• Published: 22.08.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

A transformer is provided which includes an insulating sheet separating the primary-side windings and portion of split magnetic core from the secondary-side windings and portion of split magnetic core. Thin layers of conductive and semiconductive material are deposited on areas of the insulating sheet surfaces facing the primary and secondary sides. These layers are electrically referenced or tied to the potentials of the respective primary or secondary sides. This ensures that the high electric field due to primary-to-secondary potential gradient is substantially placed across the insulating sheet dielectric and avoided in the air gaps or voids in the transformer, thus reducing undesirable partial discharge effects. The two core sections on the primary and secondary side are also electrically referenced or tied to the potentials of their adjacent windings, thus reducing high electric fields and partial discharge in the space between the core sections and the windings.