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:
Nov. 04, 2025
Filed:
Nov. 02, 2021
Sumitomo Electric Industries, Ltd., Osaka, JP;
Naoki Ayai, Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
An inverter according to the present disclosure is an inverter connected in parallel to an alternating-current circuit to which an alternating-current power source is connected, and configured to provide an independent output to the alternating-current circuit. The inverter includes a power converter configured to convert a direct-current power into an alternating-current power to supply power to the alternating-current circuit, a voltage sensor configured to detect an alternating-current voltage of the alternating-current circuit, and a controller configured to control the power converter. The controller is configured to add frequency feedback processing to an operation of calculating a frequency detection value in a phase locked loop to be executed based on the alternating-current voltage, the frequency feedback processing being processing of adding a frequency correction value obtained by performing a proportional integral operation on a comparison result between a previous value of the frequency detection value and a frequency reference value.