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:
Apr. 21, 2020
Filed:
Apr. 10, 2017
Delta Electronics (Shanghai) Co., Ltd, Shanghai, CN;
Delta Electronics (Shanghai) CO., LTD, Shanghai, CN;
Abstract
A method for monitoring capacitance of DC bus capacitor of a power electronic converter is provided, wherein the power electronic converter includes at least one AC/DC conversion circuit and the DC bus capacitor, a power input/output interface of the AC/DC conversion circuit including a first terminal and a second terminal. The first terminal is connected to an AC grid with a frequency of f, the second terminal is connected to the DC bus capacitor, f is any positive real number, and the method includes: measuring a pulsating power with a frequency of 2f flowing through the DC bus capacitor and a voltage on the DC bus capacitor; and calculating the capacitance of the DC bus capacitor based on the pulsating power and the voltage on the DC bus capacitor. An apparatus for monitoring the capacitance of the DC bus capacitor is provided correspondingly.