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:
May. 19, 2026
Filed:
Dec. 04, 2025
Epc Power Corporation, Poway, CA (US);
M A Awal, Poway, CA (US);
EPC POWER CORPORATION, Poway, CA (US);
Abstract
A solid-state transformer system comprises a plurality of isolated DC-DC converter modules, each module having a medium voltage port and a low voltage port. The medium voltage ports are series-connected in each phase of a single-phase or three-phase configuration to form a medium voltage AC interface, and each module comprises two quadrant switches with no active front end. The system includes a controller configured to generate voltage references for each module, the voltage references comprising a DC common-mode component and an AC differential-mode component, and optionally an AC common-mode component, wherein the DC common-mode component ensures unidirectional voltage operation across the medium voltage port of each module. The low voltage ports are interconnected to form a low voltage DC interface. The isolated DC-DC converter modules utilize conversion topologies including frequency modulated resonant converters, phase-shift modulated converters, and hybrid conversion topologies, operating at frequencies between 20 kHz and 100 kHz to achieve soft switching operation over wide operating ranges for improved efficiency and simplified manufacturability.