公开(公告)号：US20220123592A1

公开(公告)日：2022-04-21

申请号：US17286566

申请日：2019-10-16

申请人： OMRON Corporation

发明人： Goro NAKAO ,  Yusuke KAWAI ,  Kenichi TABATA ,  Atsushi NOMURA ,  Takahiro TAKEYAMA ,  Masanobu NAKAJO

IPC分类号： H02J50/12 ,  H04B5/00

摘要： A power transmission device of a non-contact power feeding device according one or more embodiments may include a control circuit configured to control at least one of a switching frequency or a voltage of AC power supplied from a power supply circuit to a transmission coil, on the basis of a change over time in a strength of a magnetic field detected by a magnetic field detection element configured to detect a strength of a magnetic field generated from the transmission coil of the power transmission device. Whereas, a power reception device has a resonant circuit having a reception coil configured to receive electric power from the power transmission device and a resonance suppression coil arranged to be capable of being electromagnetically coupled to the reception coil.

公开(公告)号：US20210408828A1

公开(公告)日：2021-12-30

申请号：US17294790

申请日：2019-10-16

申请人： OMRON CORPORATION

发明人： Goro NAKAO ,  Kenichi TABATA ,  Yusuke KAWAI ,  Atsushi NOMURA ,  Takahiro TAKEYAMA ,  Masanobu NAKAJO

IPC分类号： H02J50/12 ,  H02J50/60

摘要： A power transmitter device of a non-contact power feeding device includes a transmitter coil configured to supply power to the power receiver device, a power supply circuit including a plurality of switching elements connected between a DC power supply and the transmitter coil in a full-bridge configuration or a half-bridge configuration. The power supply circuit may be configured to switch the plurality of switching elements to an on or off state at a switching frequency to convert DC power supplied from the DC power supply into AC power having the switching frequency and supply the AC power to the transmitter coil, and a phase control circuit including at least one LC series circuit connected to both ends of the transmitter coil.

公开(公告)号：US20220216736A1

公开(公告)日：2022-07-07

申请号：US17429646

申请日：2020-03-02

申请人： OMRON Corporation

发明人： Kenichi TABATA ,  Goro NAKAO ,  Yusuke KAWAI ,  Atsushi NOMURA ,  Masanobu NAKAJO ,  Takahiro TAKEYAMA

IPC分类号： H02J50/70 ,  H02J50/12

摘要： A power transfer device includes a power transfer coil that transfers power to another device in a non-contact manner, a power transmission and reception circuit that supplies power to the power transfer coil or outputs power received by the power transfer coil to a load circuit, and a protection coil disposed between the power transfer coil and the power transmission and reception circuit to prevent a magnetic flux generated by the power transfer coil from reaching the power transmission and reception circuit. The protection coil includes an air-core coil formed of a wiring pattern of a conductor provided on a board disposed between the power transfer coil and the power transmission and reception circuit, and at least one core coil connected in series to the air-core coil.

公开(公告)号：US20220085650A1

公开(公告)日：2022-03-17

申请号：US17416546

申请日：2019-12-03

申请人： OMRON Corporation

发明人： Atsushi NOMURA ,  Goro NAKAO ,  Yusuke KAWAI ,  Masanobu NAKAJO ,  Takahiro TAKEYAMA ,  Kenichi TABATA

IPC分类号： H02J50/12 ,  H04B5/00 ,  H02J50/00

摘要： A measured value of an output voltage may be obtained by rectifying power received through a resonance circuit including a reception coil that receives power from a transmission coil of a power transmission device and a resonance capacitor connected in series with the reception coil. When the measured value becomes equal to or larger than an upper limit threshold value, a power reception device of a non-contact power supply device short-circuits a resonance suppression coil provided so as to be electromagnetically couplable with the reception coil. The power transmission device and the power reception device are provided such that power is transmitted from the transmission coil to the reception coil, and the reception coil and the resonance suppression coil are provided such that a coupling degree between the resonance suppression coil and the transmission coil becomes higher than a coupling degree between the reception coil and the transmission coil.

公开(公告)号：US20210344229A1

公开(公告)日：2021-11-04

申请号：US17286501

申请日：2019-10-18

申请人： OMRON Corporation

发明人： Goro NAKAO ,  Kenichi TABATA ,  Yusuke KAWAI ,  Atsushi NOMURA ,  Takahiro TAKEYAMA ,  Masanobu NAKAJO

IPC分类号： H02J50/12 ,  H02J50/40 ,  H02J50/80

摘要： A power reception device of a non-contact power feeding device has: a resonant circuit having a reception coil configured to receive electric power from a power transmission device and a resonant capacitor connected in series with the reception coil; a first rectifier circuit configured to rectify electric power received via the resonant circuit; a smoothing capacitor connected to the first rectifier circuit and configured to smooth a voltage outputted from the first rectifier circuit; a sub-coil arranged to be capable of being electromagnetically coupled to the reception coil; and a second rectifier circuit connected between the sub-coil and the smoothing capacitor, and configured to output electric power according to a voltage generated in the sub-coil to the smoothing capacitor in response to a voltage obtained by rectifying a voltage generated in the sub-coil being higher than a voltage between both terminals of the smoothing capacitor.