# US 2021/0281186 A1 · Conversion apparatus, device, and control method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0281186 A1 - Document ID: US20210281186A1 - Status: Published application - Kind: A1 - Application number: 16/338,755 - Filed: 2016-10-03 - Published: 2021-09-09 - Earliest claimed: 2016-10-03 - Assignees: Honda Motor Co., Ltd. - Applicants: Honda Motor Co., Ltd. - Inventors: Satoshi HASHINO; Masaaki KOMATSU - Web page: https://patentgrep.com/patent/US20210281186A1 ## CPC - H02M 3/1584: {with a plurality of power processing stages connected in parallel} - H02M 1/0009: {Devices or circuits for detecting current in a converter} - H02M 1/0025: {Arrangements for modifying reference values, feedback values or error values in the control loop of a converter} - H02M 3/1586: {switched with a phase shift, i.e. interleaved} - H02M 7/537: using semiconductor devices only, e.g. single switched pulse inverters - 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 7/5387: in a bridge configuration - H02P 27/06: using DC to AC converters or inverters (H02P27/05 takes precedence) - H02P 2201/07: DC-DC step-up or step-down converter inserted between the power supply and the inverter supplying the motor, e.g. to control voltage source fluctuations, to vary the motor speed - 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) - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS ## Abstract A conversion apparatus includes: a conversion module having plural phases, each including a converter and a sensor, in which the plural phases are electrically connected in parallel, and a controller. The controller includes a first unit for determining a basic duty ratio common to all of the plural phases, so that an input or an output of the conversion module becomes equal to a target voltage or a target current, a second unit for determining a correction duty ratio and correcting the basic duty ratio for each of the plural converters, and a generator for generating the control signal based on the basic duty ratio and the correction duty ratio. The second unit determines the correction duty ratio based on a difference between plural phase currents respectively flowing in the plural converters. The basic duty ratio is equal to or greater than an absolute value of the correction duty ratio. ## Claims ### Claim 1 A conversion apparatus comprising: a conversion module having a plurality of phases, each of which includes a converter capable of performing a voltage conversion of electric power discharged from or charged in a power source and a sensor for detecting a current value of a phase current flowing in the converter, wherein the plurality of phases are electrically connected in parallel; and a controller for controlling a plurality of converters respectively according to a control signal generated based on a predetermined duty ratio, wherein the controller includes: a first determination unit for determining a basic duty ratio common to all of the plurality of phases, so that an input or an output of the conversion module becomes equal to a target voltage or a target current; a second determination unit for determining a correction duty ratio including at least one positive value and at least one negative value and correcting the basic duty ratio for each of the plurality of converters; and a generator for generating the control signal based on the basic duty ratio and the correction duty ratio, wherein the second determination unit determines the correction duty ratio based on a difference between a plurality of phase currents respectively flowing in the plurality of converters, and the basic duty ratio is equal to or greater than an absolute value of the correction duty ratio. ### Claim 2 (depends on 1) The conversion apparatus according to claim 1, wherein an absolute value of a sum of individual correction duty ratios with respect to the plurality of converters is equal to or less than a predetermined value. ### Claim 3 (depends on 2) The conversion apparatus according to claim 2, wherein the sum of individual correction duty ratios with respect to the plurality of converters is 0. ### Claim 4 (depends on 1) The conversion apparatus according to claim 1, wherein the second determination unit determines the correction duty ratio that is within an upper limit or lower limit whose absolute value is smaller than the basic duty ratio. ### Claim 5 (depends on 4) The conversion apparatus according to claim 4, wherein the absolute value of the upper limit or the lower limit is a value equal to or greater than a maximum value of the correction duty ratio that is determined from a difference between current values that are output normally from all of sensors included in the plurality of phases. ### Claim 6 (depends on 4) The conversion apparatus according to claim 4, wherein the absolute value of the upper limit or the lower limit is a value equal to or less than a minimum value of the correction duty ratio that is determined from a difference between current values that are output when some of sensors included in the plurality of phases are abnormal. ### Claim 7 (depends on 4) The conversion apparatus according to claim 4, wherein the absolute value of the upper limit or the lower limit is a value equal to or greater than a maximum value of the correction duty ratio that is determined from a difference between current values that are output normally from all of sensors included in the plurality of phases, and a value equal to or less than a minimum value of the correction duty ratio that is determined from a difference between current values that are output when some of the sensors included in the plurality of phases are abnormal. ### Claim 8 (depends on 7) The conversion apparatus according to claim 7, wherein the absolute value of the upper limit or the lower limit is a value closer to the maximum value than the minimum value. ### Claim 9 A conversion apparatus comprising: a conversion module having two phases, each of which includes a converter capable of performing a voltage conversion of an electric power discharged from or charged in a power source and a sensor for detecting a current value of a phase current flowing in the converter, wherein the two phases are electrically connected in parallel; and a controller for controlling two converters respectively according to a control signal generated based on a predetermined duty ratio, wherein the controller includes: a first determination unit for determining a basic duty ratio common to all of the plurality of phases, so that an output of the conversion module becomes equal to a target voltage or a target current; a second determination unit for determining a correction duty ratio including at least one positive value and at least one negative value and correcting the basic duty ratio for each of the two converters; and a generator for generating the control signal based on the basic duty ratio and the correction duty ratio, wherein the second determination unit determines the correction duty ratio based on a difference between a plurality of phase currents respectively flowing in the two converters, and the basic duty ratio is equal to or greater than an absolute value of the correction duty ratio. ### Claim 10 (depends on 1) A device comprising the conversion apparatus according to claim 1. ### Claim 11 A control method of a conversion apparatus including a conversion module having a plurality of phases, each of which includes a converter capable of performing a voltage conversion of electric power discharged from or charged in a power source and a sensor for detecting a current value of a phase current flowing in the converter, in which the plurality of phases are electrically connected in parallel, and a controller for controlling a plurality of converters respectively according to a control signal generated based on a predetermined duty ratio, the control method comprising: determining a basic duty ratio that is common to all of the plurality of phases so that an output of the conversion module becomes equal to a target voltage or a target current; determining individual correction duty ratios with respect to the plurality of converters based on a difference among a plurality of phase currents flowing in the plurality of converters respectively, wherein the correction duty ratio includes at least one positive value and at least one negative value and an absolute value of the correction duty ratio is equal to or less than the basic duty ratio; and generating the control signal based on the basic duty ratio and the correction duty ratio. ### Claim 12 A control method of a conversion apparatus including a conversion module having two phases, each of which includes a converter capable of performing a voltage conversion of electric power discharged from or charged in a power source and a sensor for detecting a current value of a phase current flowing in the converter, wherein the two phases are electrically connected in parallel, and a controller for controlling the two converters respectively according to a control signal generated based on a predetermined duty ratio, the control method comprising: determining a basic duty ratio that is common to the two phases so that an output of the conversion module becomes equal to a target voltage or a target current; determining individual correction duty ratios with respect to the two converters based on a difference between two phase currents flowing in the two converters respectively, wherein the correction duty ratio includes at least one positive value and at least one negative value and an absolute value of the correction duty ratio is equal to or less than the basic duty ratio; and generating the control signal based on the basic duty ratio and the correction duty ratio.