Schlumberger Technology Corporation

Toshiba International Corporation

William Michael Jackson

Obinna Ilochonwu

Adunola Ige

Omid Ghoreishi

Jeffrey Lim

Kurt Johannes LeDoux

Faruq Rajwani

A variable frequency drive system for controlling the frequency of a high-voltage power source supplied to a first electric motor includes a transformer section that includes a motorized loadbreak switch system, control power transformers, a controller programmed with control logic to ensure that the motorized loadbreak switch system opens contacts between the high-voltage power source and the variable frequency drive system once the power source is removed, and a tank containing a dielectric fluid, wherein the tank also contains, within the dielectric fluid, a manual isolation switch to supply or remove power to the transformer section, an impedance for use in soft-starting the variable frequency drive system, a primary winding, and a plurality of phase-shifted secondary windings.

Variable frequency drive with dielectric fluid-immersed transformer

Growing community of inventors

Edmonton, Canada

William Michael Jackson