Design of a high power brushless linear variable transformer

High power variable transformers are required for use in advanced high voltage-high power laboratories. However, their design is always confronted with various difficulties caused by different physical and electromagnetic design constraints. This paper presents a new design for a high power brushless linear variable transformer. The proposed design has desirable features such as low short circuit impedance which may be useful for different tests particularly high current tests, over a wide range of power requirement. An analytical design procedure is followed, after which a finite element analysis is used to confirm the analytical design results.