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公开(公告)号：US11596029B2
公开(公告)日：2023-02-28
申请号：US16713125
申请日：2019-12-13
摘要： An induction heating apparatus including an inverter comprising a switching element, the inverter configured to supply a power to a first node based on an operation of the switching element; a first heating coil around which a wire is wound in a first winding direction with respect to the first node and configured to be heated by the power supplied from the first node; a second heating coil around which a wire is wound in a second winding direction different from the first winding direction with respect to the first node and configured to be heated by the power supplied from the first node; and at least one processor configured to control a resonance frequency of a current flowing through the first heating coil and the second heating coil.
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公开(公告)号：US11895759B2
公开(公告)日：2024-02-06
申请号：US17192239
申请日：2021-03-04
发明人： Masashi Sasagawa , Masaki Ono , Masayuki Otawara , Nobuharu Nishikoori , Taro Yoshida , Tomoyuki Kanagawa , Yutaka Yagi
CPC分类号： H05B6/08 , H05B6/1272 , H05B2213/05
摘要： An induction heating apparatus is provided. The induction heating apparatus includes a heating coil configured to heat an object to be heated, a full-bridge type inverter configured to supply power to the heating coil, a capacitor provided between an intermediate node of one arm of the inverter and one end of the heating coil, and a first relay provided between the intermediate node and the other end of the heating coil 30. An intermediate node of the other arm of the inverter and an intermediate point of the heating coil are connected through a first wire. The induction heating apparatus includes a processor configured to open or close the first relay based on an impedance of the object to be heated.
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公开(公告)号：US11751291B2
公开(公告)日：2023-09-05
申请号：US17150458
申请日：2021-01-15
发明人： Tomoyuki Kanagawa , Masaki Ono , Masashi Sasagawa , Masayuki Otawara , Nobuhara Nishikoori , Taro Yoshida , Yutaka Yagi
摘要： An induction heating apparatus is provided. The induction heating apparatus includes a heating coil, an inverter, a current sensor configured to measure a driving current supplied from the inverter to the heating coil, and a controller configured to provide a drive signal to the inverter to allow the driving current to follow a target current based on a user input. The controller reduces a driving duty of the drive signal based on the driving current exceeding a predetermined reference current, and the controller provides a drive signal to the inverter to allow the driving current to follow a current less than the target current, based on the driving current being less than or equal to the predetermined reference current after reducing the driving duty of the drive signal.
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