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Patent Agency Ranking
公开(公告)号：US20190313490A1
公开(公告)日：2019-10-10
申请号：US16308015
申请日：2016-12-27
Applicant: WHIRLPOOL CORPORATION
Inventor： Andrea Gallivanoni , Cristiano Vito Pastore , Matteo Rinaldi , Natalia Roumpedaki
Abstract: A solid state radio frequency generation system is provided for an electromagnetic cooking device having an enclosed cavity. The radio frequency generation system includes: an RF feed for introducing electromagnetic radiation into the cavity to heat a food load; a high-power RF amplifier coupled to the RF feed, the amplifier comprising at least one amplifying stage configured to output a signal that is amplified in power with respect to an input RF signal; a small signal generator for supplying the input RF signal to the amplifier; and a switching power supply unit including a single DC-DC converter that converts AC mains power to low voltage DC for supply to the amplifier, and a controller configured to adapt an input current from the AC mains power to form a predefined periodic waveform with the same frequency as the AC mains power for supply to the small signal generator.
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公开(公告)号：US11057969B2
公开(公告)日：2021-07-06
申请号：US16308015
申请日：2016-12-27
Applicant: WHIRLPOOL CORPORATION
Inventor： Andrea Gallivanoni , Cristiano Vito Pastore , Matteo Rinaldi , Natalia Roumpedaki
Abstract: A solid state radio frequency generation system is provided for an electromagnetic cooking device having an enclosed cavity. The radio frequency generation system includes: an RF feed for introducing electromagnetic radiation into the cavity to heat a food load; a high-power RF amplifier coupled to the RF feed, the amplifier comprising at least one amplifying stage configured to output a signal that is amplified in power with respect to an input RF signal; a small signal generator for supplying the input RF signal to the amplifier; and a switching power supply unit including a single DC-DC converter that converts AC mains power to low voltage DC for supply to the amplifier, and a controller configured to adapt an input current from the AC mains power to form a predefined periodic waveform with the same frequency as the AC mains power for supply to the small signal generator.
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公开(公告)号：US11804807B2
公开(公告)日：2023-10-31
申请号：US16312329
申请日：2016-12-30
Applicant: WHIRLPOOL CORPORATION , Panasonic Corporation
Inventor： Franco Brindani , Natalia Roumpedaki
CPC classification number: H03F1/52 , H05B6/64 , H05B6/681 , H05B6/686 , H05B6/70 , H05B6/705 , H05B6/72 , Y02B40/00
Abstract: An RF generation system is provided for an electromagnetic cooking device having a cavity. The system includes: a signal generator for generating an input RF signal; an RF feed configured to introduce electromagnetic radiation into the cavity and to receive reflected electromagnetic radiation from the cavity; and a high-power amplifier coupled between the signal generator and the RF feed. The high-power amplifier including an amplifying stage configured to output a signal that is amplified in power, and a circulator for directing the amplified output signal to the RF feed and for redirecting any reflected radiation received from the RF feed to a dummy load. The system further includes a hardware protection component for detecting backward power in the reflected radiation and for reducing power supplied to the amplifying stage if the backward power exceeds a power threshold within a time scale that prevents damage to the circulator.
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公开(公告)号：US11122653B2
公开(公告)日：2021-09-14
申请号：US16308064
申请日：2017-09-28
Applicant: WHIRLPOOL CORPORATION
Inventor： Natalia Roumpedaki , Francesco Giordano
Abstract: A microwave oven having an enclosed cavity is provided including an RF signal generator; a solid state amplifier having a coplanar waveguide transmission line, the amplifier coupled to the RF signal generator for receiving and amplifying the RF signals generated thereby; an intermediate transition including: a metal boundary having a first section and a second section having different dimensions than that of the first section; a first dielectric disposed in the first section; a second dielectric disposed in the second section; and a center conductor extending from a first side of the substrate to a second side of the substrate through the first and second dielectrics, where a first end of the center conductor is connected to an output of the amplifier; and an antenna coupled to a second end of the center conductor for receiving the amplified RF signals and introducing electromagnetic radiation into the cavity.
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公开(公告)号：US20190312555A1
公开(公告)日：2019-10-10
申请号：US16312329
申请日：2016-12-30
Applicant: WHIRLPOOL CORPORATION , Panasonic Corporation
Inventor： Franco Brindani , Natalia Roumpedaki
Abstract: An RF generation system is provided for an electromagnetic cooking device having a cavity. The system includes: a signal generator for generating an input RF signal; an RF feed configured to introduce electromagnetic radiation into the cavity and to receive reflected electromagnetic radiation from the cavity; and a high-power amplifier coupled between the signal generator and the RF feed. The high-power amplifier including an amplifying stage configured to output a signal that is amplified in power, and a circulator for directing the amplified output signal to the RF feed and for redirecting any reflected radiation received from the RF feed to a dummy load. The system further includes a hardware protection component for detecting backward power in the reflected radiation and for reducing power supplied to the amplifying stage if the backward power exceeds a power threshold within a time scale that prevents damage to the circulator.
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