# US 12,224,629 B2 · Control system and method of controlling control system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,629 B2 - Document ID: US12224629B2 - Status: Granted - Kind: B2 - Application number: 17/856,439 - Filed: 2022-07-01 - Published: 2023-01-12 - Granted: 2025-02-11 - Earliest claimed: 2021-07-06 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Takeshi Ide - Web page: https://patentgrep.com/patent/US12224629B2 ## CPC - H02J 50/12: of the resonant type - H02K 11/27: Devices for sensing current, or actuated thereby (overcurrent protection responsive to temperature of the machines or parts thereof, e.g. windings, H02K11/25) - H02J 50/20: using microwaves or radio frequency waves - H02J 50/80: involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices - H02K 11/04: for rectification - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A control system includes a switch circuit configured to switch an alternating-current voltage, a power transmission antenna configured to wirelessly transmit power based on the alternating-current voltage determined by switching of the switch circuit, a power reception antenna configured to wirelessly receive the power wirelessly transmitted from the power transmission antenna, a rectification circuit configured to rectify a voltage output from the power reception antenna to apply the alternating-current voltage to a load unit, a current detection unit configured to detect an alternating current flowing through the switch circuit, and a control unit configured to control a value of the alternating-current voltage applied to the switch circuit based on a value of the alternating current detected by the current detection unit. ## Claims ### Claim 1 A control system, comprising: a switch circuit configured to switch an alternating-current voltage; a power transmission antenna configured to wirelessly transmit power based on the alternating-current voltage determined by switching of the switch circuit; a power reception antenna configured to wirelessly receive the power wirelessly transmitted from the power transmission antenna; a rectification circuit configured to rectify a voltage output from the power reception antenna to apply the alternating-current voltage to a load unit; a current detection unit configured to detect an alternating current flowing through the switch circuit; a control unit configured to control a value of the alternating-current voltage applied to the switch circuit based on a value of the alternating current detected by the current detection unit; a clock generation circuit configured to generate a clock signal; a first driving circuit configured to drive the switch circuit based on the clock signal generated by the clock generation circuit; a transmission circuit configured to generate a signal based on the clock signal generated by the clock generation circuit; a transmission antenna configured to wirelessly transmit the signal; a reception antenna configured to wirelessly receive the signal wirelessly transmitted from the transmission antenna; a reception circuit configured to restore the clock signal based on the signal received by the reception antenna; and a second driving circuit configured to drive the rectification circuit based on the clock signal restored by the reception circuit. ### Claim 2 (depends on 1) The control system according to claim 1, wherein the control unit controls the value of the alternating-current voltage applied to the switch circuit based on a difference between the value of the alternating current detected by the current detection unit and a target value. ### Claim 3 (depends on 1) The control system according to claim 1, wherein at least one of the following is movable: the power transmission antenna and the power reception antenna, and wherein the control unit controls the value of the alternating-current voltage applied to the switch circuit based on a relative position of the power reception antenna to the power transmission antenna and the value of the alternating current detected by the current detection unit. ### Claim 4 (depends on 2) The control system according to claim 2, wherein at least one of the following is movable: the power transmission antenna and the power reception antenna, and wherein the target value is a target value based on a sequence of movement. ### Claim 5 (depends on 1) The control system according to claim 1, wherein each of the switch circuit and the rectification circuit includes a bidirectional switch. ### Claim 6 (depends on 1) The control system according to claim 1, wherein the switch circuit and the rectification circuit are driven based on clock signals synchronized with each other. ### Claim 7 (depends on 6) The control system according to claim 6, wherein the clock signal for the rectification circuit is a wirelessly-transmitted clock signal for the switch circuit. ### Claim 8 (depends on 1) The control system according to claim 1, further comprising an alternating-current power supply configured to apply an alternating-current voltage to the switch circuit under control of the control unit. ### Claim 9 (depends on 1) The control system according to claim 1, wherein the load unit is a motor. ### Claim 10 A method of controlling a control system, the method comprising: switching an alternating-current voltage, by a switch circuit; wirelessly transmitting power based on the alternating-current voltage determined by switching of the switch circuit, by a power transmission antenna; wirelessly receiving the power wirelessly transmitted from the power transmission antenna, by a power reception antenna; rectifying a voltage output from the power reception antenna to apply the alternating-current voltage to a load unit, by a rectification circuit; detecting an alternating current flowing through the switch circuit, by a current detection unit; controlling a value of the alternating-current voltage applied to the switch circuit based on a value of the alternating current detected by the current detection unit, by a control unit; generating a clock signal, by a clock generation circuit; driving the switch circuit based on the clock signal, by a first driving circuit; generating a signal based on the clock signal, by a transmission circuit; wirelessly transmitting the signal, by a transmission antenna; wirelessly receiving the signal wirelessly transmitted from the transmission antenna, by a reception antenna; restoring the clock signal based on the signal received by the reception antenna, by a reception circuit; and driving the rectification circuit based on the clock signal restored by the reception circuit, by a second driving circuit.