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:
Jun. 07, 2022
Filed:
Feb. 26, 2020
Huawei Digital Power Technologies Co., Ltd., Shenzhen, CN;
HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD., Shenzhen, CN;
Abstract
A method and an apparatus for detecting capacitance of a filter capacitor of an inverter are provided, wherein each output terminal of the inverter is connected to one terminal of a first filter capacitor through an inductor, and the other terminals of all first filter capacitors are interconnected. The method includes: outputting a first voltage {dot over (U)}through an ioutput terminal of the inverter, i=1, 2 . . . N, i≠j, 1≤j≤N, i and j are positive integers, and N is a total quantity of output terminals of the inverter; obtaining İand determining a ratio of |İ| to |İ|, where İis a current of an inductor connected to a koutput terminal when the ioutput terminal outputs the first voltage {dot over (U)}, k=1, 2 . . . N, and k is a positive integer; and determining capacitance of a first filter capacitor connected to the joutput terminal based on İ, {dot over (U)}, and the ratio of |İ| to |İ|.