Traditional Winding Research Articles

Asymmetrical winding configuration to reduce inrush current with appropriate short-circuit current in transformer

A method for transformer design with an asymmetric winding configuration to reduce the inrush current with appropriate voltage regulation and short-circuit current is proposed. Differing from the traditional symmetric winding structure in transformer design, this method can provide the high inrush equivalent inductance and suitable leakage inductance for a transformer. The formulas of the leakage inductance and inrush equivalent inductance are derived for the asymmetric winding configuration. Theoretical analyses showing the desirable winding configuration that the inrush current can be reduced to with appropriate voltage regulation and short-circuit current are presented. Using the inferential result in experiments, the inrush current can be successfully limited under a low voltage regulation and a suitable short-circuit current.

The comparison of single- and multi-solenoidal windings for superconducting storage device performance

The author compares a scheme utilizing multisolenoidal windings (MSW) in a superconducting storage device to the traditional single solenoidal winding (SSW). It has been found that in the case of a MSW assembled from a number of solenoids smaller in diameter than those used in the SSW with the same storage capacity, the stored energy per unit volume is higher than in the SSW. It is shown that there is a parameter space where MSW is preferable to SSW. This scheme also offers additional advantages such as higher reliability, controllability and durability.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Field-containing inductors

Typical coils such as solenoids have a large magnetic dipole moment resulting in excessive interfering magnetic fields. An improved design for a field-containing inductor based on the traditional toroidal coil winding is presented. This new design consisting of two windings is suitable for high-voltage applications. Optimal shapes, energy, and forces exerted are discussed. The normalized plots of attainable inductance for various geometrical parameters presented can be used in design and applications. >