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. 30, 2025
Filed:
Oct. 18, 2023
Delta Electronics (Shanghai) Co., Ltd., Shanghai, CN;
Delta Electronics (Shanghai) Co., Ltd., Shanghai, CN;
Abstract
A modular multilevel converter and a control method are provided. When an AC input voltage from a power grid is lower than a drop threshold value and the modular multilevel converter is in a drop state, the idle upper bridge arm submodules of the n upper bridge arm submodules and the idle lower bridge arm submodules of the n lower bridge arm submodules are in the on-state. Consequently, the total number of the on-state upper bridge arm submodules and the on-state lower bridge arm submodules is increased to be greater than n. Since the average value of the DC voltages received by the upper bridge arm submodules or the lower bridge arm submodules is decreased, the voltage stress of the total submodule capacitor voltage of the on-state upper bridge arm submodules and the on-state lower bridge arm submodules is reduced.