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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.:

US 12123900 B1

PDFFull Text
Date of Patent:
Oct. 22, 2024

Filed:

Jul. 29, 2021

Power conversion device, temperature estimation method, and non-transitory computer readable storage medium with an executable program recorded thereon

Applicant:

Kabushiki Kaisha Yaskawa Denki, Kitakyushu, JP;

Inventors:

Kentaro Inomata, Kitakyushu, JP;

Noor Aamir Baloch, Kitakyushu, JP;

Tokuma Nakamichi, Kitakyushu, JP;

Hengbin Rui, Kitakyushu, JP;

Assignee:

KABUSHIKI KAISHA YASKAWA DENKI, Kitakyushu, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Nathaniel T Woodward

Assistant Examiner:

Philip L Cotey

Int. Cl.
CPC ...
G01R 21/06 (2006.01); G01K 7/22 (2006.01); G01K 7/42 (2006.01); G01K 13/00 (2021.01); G01R 21/14 (2006.01); H02P 27/06 (2006.01); H02P 27/08 (2006.01); H02P 29/68 (2016.01); G05F 3/02 (2006.01); H02M 1/00 (2006.01); H02M 1/32 (2007.01); H02M 5/293 (2006.01); H02M 5/458 (2006.01); H02M 7/00 (2006.01); H02M 7/5387 (2007.01); H02P 21/22 (2016.01);
U.S. Cl.
CPC ...
G01R 21/14 (2013.01); G01K 7/22 (2013.01); G01K 7/427 (2013.01); G01K 13/00 (2013.01); G01R 21/06 (2013.01); H02P 27/06 (2013.01); H02P 27/08 (2013.01); H02P 29/68 (2016.02); G05F 3/02 (2013.01); H02M 1/00 (2013.01); H02M 1/327 (2021.05); H02M 5/293 (2013.01); H02M 5/458 (2013.01); H02M 7/003 (2013.01); H02M 7/53871 (2013.01); H02P 21/22 (2016.02);
Abstract

A power conversion device includes a power conversion circuit including a temperature sensor configured to detect a temperature at a sensor position and a switch configured to switch a connection on and off at a switch position separated from the sensor position; a loss calculation processing circuitry configured to calculate a power loss in the switch; a loss correction processing circuitry configured to correct a calculation result of the power loss on the basis of a detection result of the temperature at the sensor position; a temperature correction processing circuitry configured to correct the detection result of the temperature on the basis of the calculation result of the power loss; and a temperature estimation processing circuitry configured to estimate a temperature at the switch position on the basis of a corrected calculation result of the power loss and a corrected detection result of the temperature.

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