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:
Jul. 16, 2019
Filed:
Apr. 11, 2018
Sungrow Power Supply Co., Ltd., Hefei, Anhui, CN;
Jiacai Zhuang, Anhui, CN;
Yuqing Cui, Anhui, CN;
Deyong Zhao, Anhui, CN;
Xiaohui Luo, Anhui, CN;
Chaoxuan Zhang, Anhui, CN;
Jun Xu, Anhui, CN;
Yilei Gu, Anhui, CN;
Xinyu Wang, Anhui, CN;
SUNGROW POWER SUPPLY CO., LTD., Anhui, CN;
Abstract
An ANPC inverter, a zero-crossing switching method and a zero-crossing switching apparatus of the ANPC inverter are provided. The method includes: controlling switch states of switch devices in a bridge leg to change according to a preset logic when zero-crossing switching occurs in an output voltage instruction of the bridge leg, so as to prevent overvoltage in the switch device in the bridge leg. The preset logic includes switching among a sequence of switch state combinations. Switch state combinations of the switch devices before and after the zero-crossing switching occurs are defined as the first and second switch state combinations of the sequence. The second to the penultimate switch state combinations are all safe switch state combinations selected in advance, in each of which a maximum voltage borne by the switch devices in the bridge leg is clamped to a safe limit value.