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:
Jun. 20, 2023
Filed:
Dec. 13, 2021
Abb Schweiz Ag, Baden, CH;
Yuzhi Zhang, Raleigh, NC (US);
Yu Du, Raleigh, NC (US);
Xiaoqing Song, Raleigh, NC (US);
Harish Suryanarayana, Raleigh, NC (US);
Veerakumar Bose, Richmond, VA (US);
Thomas Anthony Kendzia, III, Richmond, VA (US);
Harshang Shah, Raleigh, NC (US);
Christopher Alan Belcastro, Richmond, VA (US);
ABB Schweiz AG, Baden, CH;
Abstract
A method of operating a static transfer switch is provided. The method includes monitoring a voltage waveform for each phase of first and second power sources, and calculating flux for each phase of the power sources. The method also includes determining (i) a first flux difference between the respective flux of the first phases of the first and second power sources, (ii) a second flux difference between the respective flux of the second phases of the first and second power sources, and (iii) a third flux difference between the respective flux of the third phases of the first and second power sources. The method further includes turning off a third solid-state switch to disconnect the third phase of the first power source from a load, in response to the controller determining that the third flux difference is greater the first and second flux differences.