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:
Sep. 17, 2024
Filed:
Mar. 12, 2020
Tmeic Corporation, Chuo-ku, JP;
Yoshihiro Tawada, Tokyo, JP;
Kenta Yamabe, Tokyo, JP;
TMEIC Corporation, Chuo-ku, JP;
Abstract
A power conversion device including a power conversion circuit, an AC filter circuit, and a calculation unit. The power conversion circuit converts DC input power from a DC power supply to output a first AC output current and a first AC output voltage. The AC filter circuit filters the first AC output current and the first AC output voltage to generate a second AC output current and a second AC output voltage. The calculation unit calculates an estimated value of an upper impedance based on a difference value between a first voltage value and a second voltage value, the first voltage value being a value of the second AC output voltage at a time of stop of the power conversion circuit or at a time of zero output from the power conversion circuit or at a time of a certain amount of output from the power conversion circuit.