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:
Aug. 07, 2018
Filed:
Nov. 11, 2015
Sungrow Power Supply Co., Ltd., Hefei, Anhui, CN;
Jie Ding, Anhui, CN;
Haiyan Zou, Anhui, CN;
Lei Tao, Anhui, CN;
Taotao Xu, Anhui, CN;
Cheng Zhang, Anhui, CN;
SUNGROW POWER SUPPLY CO., LTD., Anhui, CN;
Abstract
A method and device for modulating a five-level inverter, and a photovoltaic system are provided. The method includes: acquiring a voltage command value Vcmd of a phase bridge; controlling a first and a fourth switching devices to be switched on alternately when Vcmd≥VPos+Vthrs; controlling the first and a third switching devices to be switched on alternately when VPos−Vthrs≤Vcmd<VPos+Vthrs; controlling the fourth and the third switching devices to be switched on alternately when 0≤Vcmd<VPos−Vthrs; controlling the third and a fifth switching devices to be switched on alternately when −VNeg+Vthrs≤Vcmd<0; controlling the third and a second switching devices to be switched on alternately when −VNeg−Vthrs≤Vcmd<−VNeg+Vthrs; controlling the fifth and the second switching devices to be switched on alternately when Vcmd<−VNeg−Vthrs