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:
Aug. 15, 2023
Filed:
Dec. 28, 2020
Neturen Co., Ltd., Tokyo, JP;
Hitoshi Nakatsu, Tokyo, JP;
Masato Yoshioka, Tokyo, JP;
Yoshimasa Tanaka, Tokyo, JP;
Tsutomu Ito, Tokyo, JP;
Kenji Koyanagi, Tokyo, JP;
Masaki Sagae, Tokyo, JP;
Tatsuya Ishii, Tokyo, JP;
Yoshitaka Misaka, Tokyo, JP;
Yasuharu Ogawa, Tokyo, JP;
NETUREN CO., LTD., Tokyo, JP;
Abstract
An induction heating device is provided. The induction heating device comprises a plurality of induction heating devices disposed at intervals along the circumference of a ring-shaped workpiece, a setting unit for setting induction heating conditions, and a switching control unit. Each of the plurality of induction heating devices comprises heating coils disposed facing areas to be heated of the workpiece, a plurality of transformers connected to the heating coils in parallel, a plurality of matching units connected to any one of the plurality of transformers, an inverter unit having a rectifier unit and an inverter unit, an inverter control unit having a rectification control unit, and a group of switches.