Insulation technology such as the winding structure, insulation material, and the insulated structure are vital to supporting further miniaturization and larger capacities of power transformers. Evaluating the insulation using electric field analyses is necessary because the insulation strength of transforms depends on the intensity of the electric field. The design does not only need to include the steady state of the insulated structure, but also the overvoltage including the power surges and short circuits.
This example presents the use of an electric field analysis to obtain the electric field intensity distribution when the maximum electric potential is applied between windings. |
