# US 10,770,917 B2 · Power transmission system transmitting powers from multiple power transmitter apparatuses to multiple power receiver apparatuses, and capable of distinguishing and separating transmitted powers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,770,917 B2 - Document ID: US10770917B2 - Status: Granted - Kind: B2 - Application number: 16/347,772 - Filed: 2017-11-07 - Published: 2019-10-17 - Granted: 2020-09-08 - Earliest claimed: 2016-11-08 - Assignees: Panasonic Intellectual Property Management Co., Ltd. - Applicants: Panasonic Intellectual Property Management Co., Ltd. - Inventors: Masahiro Yamaoka; Akira Minegishi; Junichi Kanou - Web page: https://patentgrep.com/patent/US10770917B2 ## CPC - H02J 13/14: the power network being locally controlled, e.g. home energy management systems [HEMS] - H02J 3/14: by switching loads on to, or off from, the networks, e.g. progressively balanced loading - H02J 3/46: Controlling the sharing of generated power between the generators, sources or networks - H02J 4/00: Circuit arrangements for mains or distribution networks not specified as AC or DC; Circuit arrangements for mains or distribution networks combining AC and DC sections or sub-networks (arrangements using intermediate DC-AC-DC conversion H02J1/002; arrangements using high-voltage DC [HVDC] links H02J3/36) - H02J 13/00: Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network - H02J 13/1311: {using the power network as support for the transmission} - H02J 13/1313: {using pulsed signals} - H02M 7/5387: in a bridge configuration - H04B 3/542: {the information being in digital form} - H04L 25/4904: {using self-synchronising codes, e.g. split-phase codes} - H04Q 11/04: for time-division multiplexing {(H04Q11/0001 takes precedence)} - H02J 2105/12: supplying households or buildings - H02M 1/007: {Plural converter units in cascade (push-pull DC/DC converters with pre-regulator H02M3/3374; DC-AC converters following a DC-DC stage including a high frequency transformer H02M7/4807; DC-AC converters following a DC-DC conversion stage generating periodically varying voltages H02M7/4826)} - H02M 1/008: {Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators} - H02M 7/219: in a bridge configuration - Y02E 60/00: Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation - Y04S 40/121: using the power network as support for the transmission - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS ## Abstract Each one of code modulators modulates first power to generate a code-modulated wave using a modulation code based on a code sequence, and transmits the code-modulated wave to one of code demodulators. Each one of code demodulator receives the code-modulated wave from one of the code modulators, and demodulates the received code-modulated wave to generate second power using a demodulation code based on a code sequence identical to the code sequence of the modulation code used. When power is transmitted between each one of transmitter and receiver pairs, a controller selects and assigns code sequences to the transmitter and receiver pairs, so as to reduce an average of an absolute value of a total current of the code-modulated waves of the transmitter and receiver pairs in a transmission path, as compared to a reference value, the average being averaged over a predetermined time. ## Claims ### Claim 1 A power transmission system, comprising a plurality of power transmitter apparatuses, a plurality of power receiver apparatuses, and a controller, the power transmission system transmitting powers from the plurality of power transmitter apparatuses to the plurality of power receiver apparatuses via a transmission path, wherein each of the plurality of power transmitter apparatuses comprises a code modulator that modulates first power to generate a code-modulated wave by code modulation using a modulation code based on a code sequence, and transmits the code-modulated wave to one of the plurality of power receiver apparatuses via the transmission path; wherein each of the plurality of power receiver apparatuses comprises a code demodulator that receives the code-modulated wave from one of the plurality of power transmitter apparatuses via the transmission path, and demodulates the received code-modulated wave to generate second power by code demodulation using a demodulation code based on a code sequence identical to the code sequence of the modulation code used for the code modulation; and wherein, when power is transmitted between each of a plurality of transmitter and receiver pairs, each of the transmitter and receiver pairs including one of the plurality of power transmitter apparatuses and one of the plurality of power receiver apparatuses, the controller selects and assigns a plurality of code sequences to the plurality of transmitter and receiver pairs, respectively, so as to reduce an average of an absolute value of a total current of the code-modulated waves of the plurality of transmitter and receiver pairs in the transmission path, as compared to a predetermined reference value, the average being averaged over a predetermined time. ### Claim 2 (depends on 1) The power transmission system as claimed in claim 1, wherein, when a new transmitter and receiver pair starts power transmission in a state that at least one existing transmitter and receiver pair is transmitting power, the controller selects and assigns one code sequence to the new transmitter and receiver pair, so as to reduce an average of an absolute value of a total current of the code-modulated wave of the existing transmitter and receiver pair, and the code-modulated wave of the new transmitter and receiver pair, in the transmission path, as compared to the reference value, the average being averaged over the predetermined time. ### Claim 3 (depends on 1) The power transmission system as claimed in claim 1, wherein the controller selects and assigns a plurality of code sequences to the plurality of transmitter and receiver pairs, respectively, so as to minimize a maximum peak value of a frequency spectrum of a total current of the code-modulated waves of the plurality of transmitter and receiver pairs in the transmission path. ### Claim 4 (depends on 1) The power transmission system as claimed in claim 1, wherein the controller selects and assigns a plurality of code sequences to the plurality of transmitter and receiver pairs, respectively, so as to minimize a peak value having a lowest frequency among one or more peak values of a frequency spectrum of a total current of the code-modulated waves of the plurality of transmitter and receiver pairs in the transmission path. ### Claim 5 (depends on 1) The power transmission system as claimed in any claim 1, wherein the controller selects and assigns a plurality of code sequences to the plurality of transmitter and receiver pairs, respectively, such that a total current of the code-modulated waves of the plurality of transmitter and receiver pairs in the transmission path meets a predetermined criterion for electromagnetic interference. ### Claim 6 (depends on 1) The power transmission system as claimed in claim 1, wherein the modulation codes used by the power transmitter apparatuses of the plurality of transmitter and receiver pairs have a same length, are synchronized with each other, and have a head bit of an identical value. ### Claim 7 (depends on 1) The power transmission system as claimed in claim 1, wherein the plurality of code sequences are orthogonal to each other. ### Claim 8 (depends on 1) The power transmission system as claimed in claim 1, wherein in each of the plurality of power transmitter apparatuses, the first power is direct-current power or alternating-current power; and wherein in each of the plurality of power receiver apparatuses, the second power is direct-current power or alternating-current power. ### Claim 9 (depends on 1) The power transmission system as claimed in claim 1, wherein the code modulator of at least one of the plurality of power transmitter apparatuses is further operable as a code demodulator; wherein the code demodulator of at least one of the plurality of power receiver apparatuses is further operable as a code modulator; and wherein power is transmitted from the power receiver apparatus comprising the code demodulator operable as the code modulator, to the power transmitter apparatus comprising the code modulator operable as the code demodulator. ### Claim 10 (depends on 1) The power transmission system as claimed in claim 1, wherein the code modulator comprises a first generation circuit that generates the modulation code; and wherein the code demodulator comprises a second generation circuit that generates the demodulation code. ### Claim 11 (depends on 10) The power transmission system as claimed in claim 10, wherein the controller transmits a control signal for generating the modulation code, a modulation start time, and a modulation end time to the plurality of power transmitter apparatuses; wherein the controller transmits a control signal for generating the demodulation code, a demodulation start time, and a demodulation end time to the plurality of power receiver apparatuses; wherein in each of the plurality of power transmitter apparatuses, the code modulator modulates the first power to generate the code-modulated wave by code modulation based on the control signal for generating the modulation code, the modulation start time, and the modulation end time; and wherein in each of the plurality of power receiver apparatuses, the code demodulator demodulates the code-modulated wave into the second power by code demodulation based on the control signal for generating the demodulation code, the demodulation start time, and the demodulation end time. ### Claim 12 (depends on 11) The power transmission system as claimed in claim 11, further comprising: first power measuring means that measures amounts of the first power in the plurality of power transmitter apparatuses; and second power measuring means that measures amounts of the second power in the plurality of power receiver apparatuses. ### Claim 13 (depends on 12) The power transmission system as claimed in claim 12, wherein the controller controls operations of the plurality of power transmitter apparatuses and the plurality of power receiver apparatuses, based on the amounts of the first power measured by the first power measuring means, and the amounts of the second power measured by the second power measuring means, to transmit powers from the plurality of power transmitter apparatuses to the plurality of power receiver apparatuses. ### Claim 14 (depends on 13) The power transmission system as claimed in claim 13, further comprising current measuring means that measures an amount of current in the transmission path. ### Claim 15 (depends on 14) The power transmission system as claimed in claim 14, wherein the controller controls operations of the plurality of power transmitter apparatuses and the plurality of power receiver apparatuses based on the amount of current measured by the current measuring means, to transmit powers from the plurality of power transmitter apparatuses to the plurality of power receiver apparatuses. ### Claim 16 A power transmission system, comprising a plurality of power transmitter apparatuses, a plurality of power receiver apparatuses, and a controller, the power transmission system transmitting powers from the plurality of power transmitter apparatuses to the plurality of power receiver apparatuses via a transmission path, wherein each of the plurality of power transmitter apparatuses comprises a code modulator that modulates first power to generate a code-modulated wave by code modulation using a modulation code based on a code sequence, and transmits the code-modulated wave to one of the plurality of power receiver apparatuses via the transmission path; wherein each of the plurality of power receiver apparatuses comprises a code demodulator that receives the code-modulated wave from one of the plurality of power transmitter apparatuses via the transmission path, and demodulates the received code-modulated wave to generate second power by code demodulation using a demodulation code based on a code sequence identical to the code sequence of the modulation code used for the code modulation; and wherein, when power is transmitted between each of a plurality of transmitter and receiver pairs, each of the transmitter and receiver pairs including one of the plurality of power transmitter apparatuses and one of the plurality of power receiver apparatuses, the controller selects and assigns a plurality of code sequences to the plurality of transmitter and receiver pairs, respectively, so as to minimize an average of an absolute value of a total current of the code-modulated waves of the plurality of transmitter and receiver pairs in the transmission path, the average being averaged over a predetermined time. ### Claim 17 (depends on 16) The power transmission system as claimed in claim 16, wherein, when a new transmitter and receiver pair starts power transmission in a state that at least one existing transmitter and receiver pair is transmitting power, the controller selects and assigns one code sequence to the new transmitter and receiver pair, so as to minimize an average of an absolute value of a total current of the code-modulated wave of the existing transmitter and receiver pair, and the code-modulated wave of the new transmitter and receiver pair, in the transmission path, the average being averaged over the predetermined time.