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Patent Agency Ranking
公开(公告)号：US20220181910A1
公开(公告)日：2022-06-09
申请号：US17599238
申请日：2020-03-26
Inventor： Hiroyuki HOSOI , Hiroshi YAMAMOTO , Satoru KIKUCHI , Toru MATSUGI , Masanori AKINAKA , Akira NISHIKAWA
Abstract: A power receiving device includes: a power receiving antenna to wirelessly receive AC power from a power transmitting antenna in the power transmitting device; a power receiving circuit to convert the AC power received by the power receiving antenna into DC power and to output the DC power; an impedance adjustment circuit disposed on a transmission path between a load that utilizes the DC power and the power receiving antenna, the impedance adjustment circuit being capable of causing a change in input impedance thereof; and a power reception control circuit to control the impedance adjustment circuit. The power reception control circuit consecutively changes a value of the input impedance of the impedance adjustment circuit to a value selected from among a plurality of values, determines from among the plurality of values a value at which power to be supplied to the load becomes largest, and sets and maintains the input impedance at an operating impedance value that is based on the determined value.
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2.发明申请公开(公告)号：US20220149657A1
公开(公告)日：2022-05-12
申请号：US17598518
申请日：2020-03-26
Inventor： Kazunori SATO , Satoru KIKUCHI
IPC: H02J50/05 , H02J50/90 , H02J50/40 , H02J7/02 , H02J7/00 , H02J50/12 , B60L53/12 , B60L53/22 , B60L53/62
Abstract: A power receiving device includes: a power receiving antenna to wirelessly receive AC power from a power transmitting antenna in a power transmitting device; a power receiving circuit to convert the AC power received by the power receiving antenna into DC power and to output the DC power; a charge-discharge control circuit to control charging and discharging of an electrical storage device to be charged by the DC power output from the power receiving circuit; and a switching circuit connected between the power receiving circuit and the charge-discharge control circuit and between the electrical storage device or the other electrical storage device and the charge-discharge control circuit. The charge-discharge control circuit is booted by energy that is stored in the electrical storage device or another electrical storage device. The switching circuit switches between a first state in which power is supplied from the electrical storage device or the other electrical storage device to the charge-discharge control circuit and a second state in which power is supplied from the power receiving circuit to the charge-discharge control circuit.
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公开(公告)号：US20190089202A1
公开(公告)日：2019-03-21
申请号：US16198824
申请日：2018-11-22
Inventor： Eiji TAKAHASHI , Tsutomu SAKATA , Satoru KIKUCHI , Hiroshi KANNO
CPC classification number: H02J50/12 , B60L1/00 , B60L53/12 , B60L2210/30 , B60L2210/40 , H02J7/025 , H02J50/10 , H02J50/20 , H02J50/80 , H02M7/537 , Y02T10/7005 , Y02T10/7072 , Y02T10/7241 , Y02T90/122 , Y02T90/127 , Y02T90/14
Abstract: A power receiving device includes a power receiving antenna that receives AC power from a power transmitting antenna, a rectifier circuit that converts the AC power into DC power, a detection circuit that detects the DC power, a load driven by the DC power, a battery that charges the DC power, a switching circuit that provides i) connection and disconnection between the rectifier circuit and the load and ii) connection and disconnection between the load and the battery, and a control circuit that controls the power receiving device. The control circuit controls the switching circuit to disconnect the rectifier circuit from the load and connect the load to the battery if the DC power is less than or equal to a power threshold value, and drive the load by the DC power charged in the battery.
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公开(公告)号：US20180178660A1
公开(公告)日：2018-06-28
申请号：US15847929
申请日：2017-12-20
Inventor： Hiroshi YAMAMOTO , Satoru KIKUCHI
Abstract: A vehicle to be driven by electric power which is wirelessly transmitted from a power transmitter having two transmission electrodes includes: two reception electrodes to receive AC power from the two transmission electrodes through capacitive coupling respectively with the two transmission electrodes; a power receiving circuit which is connected to the two reception electrodes to convert AC power received by the two reception electrodes into DC power or another form of AC power, and supply the DC power or other form of AC power to an electric motor which drives the vehicle; and a control circuit which, while the vehicle is traveling over the two transmission electrodes, increases an impedance of the vehicle as viewed from the power transmitter when a value of at least one of power, voltage and current in the power receiving circuit, or a change rate over time thereof, exceeds a threshold value.
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5.发明申请公开(公告)号：US20180205266A1
公开(公告)日：2018-07-19
申请号：US15865975
申请日：2018-01-09
Inventor： Hideaki MIYAMOTO , Satoru KIKUCHI , Tsutomu SAKATA , Eiji TAKAHASHI , Hiroshi KANNO
Abstract: A power transmitter wirelessly transmits electric power to a power receiver that includes a reception antenna. The power transmitter includes: an inverter circuit; a transmission antenna which sends out the AC power having been output from the inverter circuit; and a control circuit which, based on measurement values of voltage and current to be input to the inverter circuit, determines a value of a control parameter defining an output voltage from the inverter circuit and controls the inverter circuit by using the determined value of the control parameter. When at least one of the measurement values of voltage and current to be input to the inverter circuit changes, the control circuit changes the value of the control parameter based on the measurement values of voltage and current so that a voltage to be output from the power receiving circuit is maintained within a predetermined range.
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