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:
Jan. 13, 2026
Filed:
Mar. 25, 2022
Foshan Shunde Midea Electric Science and Technology Co., Ltd., Foshan, CN;
Gd Midea Air-conditioning Equipment Co., Ltd., Foshan, CN;
Ming Zhao, Foshan, CN;
Zhaobin Huang, Foshan, CN;
Tan Long, Foshan, CN;
Xianshi Wen, Foshan, CN;
Dong Wei, Foshan, CN;
Zhenghui Huang, Foshan, CN;
FOSHAN SHUNDE MIDEA ELECTRIC SCIENCE AND TECHNOLOGY CO., LTD., Foshan, CN;
GD MIDEA AIR-CONDITIONING EQUIPMENT CO., LTD., Foshan, CN;
Abstract
A voltage control method includes obtaining two half-bus voltages at a direct current side of a three-level converter, overvoltage protection values of the two half-bus voltages, and a load voltage required by a load. One of the two half-bus voltages is configured to supply voltage to the load. The method further includes determining a voltage control strategy based on a relationship among the two half-bus voltages, the overvoltage protection values, and the load voltage. The voltage control strategy compensates for an output duty ratio of a switch of the three-level converter, such that the one of the two half-bus voltages is greater than or equal to the load voltage and each of the two half-bus voltages is smaller than or equal to a corresponding one of the overvoltage protection values. The method also includes performing voltage control on the two half-bus voltages based on the voltage control strategy.