The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 17, 2013
Filed:
Aug. 23, 2010
William Michael Jackson, Edmonton, CA;
Kurt Johannes Ledoux, Canyon Lake, TX (US);
Omid Ghoreishi, Edmonton, CA;
Jeffrey Lim, Edmonton, CA;
Obinna Ilochonwu, Edmonton, CA;
Faruq Rajwani, Edmonton, CA;
Adunola Ige, Sugar Land, TX (US);
William Michael Jackson, Edmonton, CA;
Kurt Johannes LeDoux, Canyon Lake, TX (US);
Omid Ghoreishi, Edmonton, CA;
Jeffrey Lim, Edmonton, CA;
Obinna Ilochonwu, Edmonton, CA;
Faruq Rajwani, Edmonton, CA;
Adunola Ige, Sugar Land, TX (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Toshiba International Corporation, Houston, TX (US);
Abstract
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.