# US 10,320,284 B2 · Inverter device having shunt resistor and printed board with conductive pattern component joining shunt resistor and terminal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,320,284 B2 - Document ID: US10320284B2 - Status: Granted - Kind: B2 - Application number: 15/736,768 - Filed: 2016-06-08 - Published: 2018-07-05 - Granted: 2019-06-11 - Earliest claimed: 2015-06-17 - Assignees: Daikin Industries, Ltd. - Applicants: Daikin Industries, Ltd. - Inventors: Hirotaka Doi; Hiroshi Doumae; Takuji Koyama; Michiya Takezoe; Keito Kotera; Masahiro Yamamoto; Yoshitsugu Koyama; Sumio Kagimura - Web page: https://patentgrep.com/patent/US10320284B2 ## CPC - H02M 1/34: Snubber circuits - G01R 1/203: {Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts (resistors in general H01C; microwave or radiowave terminations H01P1/26; coupling devices H01R)} - H01C 13/00: Resistors not provided for elsewhere - H02M 7/066: {particular circuits having a special characteristic} - H02M 7/48: using discharge tubes with control electrode or semiconductor devices with control electrode - G01R 31/42: AC power supplies - H02M 1/0009: {Devices or circuits for detecting current in a converter} - H02M 1/348: {Passive dissipative snubbers} - H05K 2201/09227: Layout details of a plurality of traces, e.g. escape layout for Ball Grid Array [BGA] mounting - 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) - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - H01C: RESISTORS - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract An inverter device uses an inverter to convert DC voltage supplied from a rectifying component to AC voltage and applies the AC voltage to an inductive load. The inverter device includes a shunt resistor provided on a direct-current link interconnecting the rectifying component and the inverter, a first terminal passing current to the shunt resistor, a second terminal to which the current from the shunt resistor flows, and a printed board having a conductive pattern with first and second conductive pattern components joining the shunt resistor and the first and second terminals, respectively. The first conductive pattern component includes a first central region connecting right and left side ends of the shunt resistor to right and left side ends of the first terminal, and first right and left side protruding regions. A ratio of areas of the first left and right side protruding regions is 0.6 to 1.6. ## Claims ### Claim 1 An inverter device that uses an inverter to convert direct-current voltage supplied from a rectifying component to alternating-current voltage and applies the alternating-current voltage to an inductive load, the inverter device comprising: a shunt resistor provided on a direct-current link interconnecting the rectifying component and the inverter; a first terminal passing current to the shunt resistor; a second terminal to which the current from the shunt resistor flows; and a printed board with a conductive pattern formed thereon, the conductive pattern including a first conductive pattern component that joins the shunt resistor and the first terminal to each other, and a second conductive pattern component that joins the shunt resistor and the second terminal to each other, the first conductive pattern component, as seen from a position facing the shunt resistor from the first terminal, including a first central region connecting a right-side end and a left-side end of the shunt resistor to a right-side end and a left-side end of the first terminal, a first right-side protruding region jutting out on a right side from the first central region and extending between the right side end of the shunt resistor and the right side end of the first terminal, and a first left-side protruding region jutting out on a left side from the first central region and extending between the left side end of the shunt resistor and the left side end of the first terminal, the first right-side protruding region and the first left-side protruding region being different in shape and area, and a ratio of an area of the first left-side protruding region to an area of the first right-side protruding region being a first range of 0.6 to 1.6. ### Claim 2 (depends on 1) The inverter device according to claim 1, wherein the second conductive pattern component, as seen from a position facing the second terminal from the shunt resistor, includes a second central region connecting the right-side end and the left-side end of the shunt resistor to a right-side end and a left-side end of the second terminal, a second right-side protruding region jutting out on the right side from the second central region, and a second left-side protruding region jutting out on the left side from the second central region, and a ratio of an area of the second left-side protruding region to an area of the second right-side protruding region being in a second range of 0.6 to 1.6. ### Claim 3 (depends on 1) The inverter device according to claim 1, wherein at least one of the first conductive pattern component and the second conductive pattern component includes a cutout defining an area that corrects a direction of the current flowing to the shunt resistor. ### Claim 4 An inverter device that uses an inverter to convert direct-current voltage supplied from a rectifying component to alternating-current voltage and applies the alternating-current voltage to an inductive load, the inverter device comprising: a shunt resistor provided on a direct-current link interconnecting the rectifying component and the inverter; a first terminal passing current to the shunt resistor; a second terminal to which the current from the shunt resistor flows; and a printed board with a conductive pattern formed thereon, the conductive pattern including a first conductive pattern component that joins the shunt resistor and the first terminal to each other, and a second conductive pattern component that joins the shunt resistor and the second terminal to each other, the first conductive pattern component, as seen from a position facing the shunt resistor from the first terminal, including a first central region connecting a right-side end and a left-side end of the shunt resistor to a right-side end and a left-side end of the first terminal, a first right-side protruding, region jutting out on a right side from the first central region, and a first left-side protruding region jutting out on a left side from the s central region, a ratio of an area of the first left-side protruding region to an area of the first right-side protruding region being a first range of 0.6 to 1.6, the first conductive pattern component further including a cutout defining an area that corrects a direction of the current flowing to the shunt resistor, and when an area of the first right-side protruding region and an area of the first left-side protruding region are different, and when a protruding distance of the first right-side protruding region using the right-side end of the shunt resistor as a reference and a protruding distance of the first left-side protruding region using the left-side end of the shunt resistor as a reference are different, the cutout being provided in whichever of the first right-side protruding region and the first left-side protruding region having a larger area and a larger protruding distance. ### Claim 5 An inverter device that uses an inverter to convert direct-current voltage supplied from a rectifying component to alternating-current voltage and applies the alternating-current voltage to an inductive load, the inverter device comprising: a shunt resistor provided on a direct-current link interconnecting the rectifying component and the inverter; a first terminal passing current to the shunt resistor; a second terminal to which the current from the shunt resistor flows; and a printed board with a conductive pattern famed thereon, the conductive pattern including a first conductive pattern component that joins the shunt resistor and the first terminal to each other, and a second conductive pattern component that joins the shunt resistor and the second terminal to each other, the first conductive pattern component, as seen from a position facing the shunt resistor from the first terminal, including a first central region connecting a right-side end and a left-side end of the shunt resistor to a right-side end and a left-side end of the first terminal, a first right-side protruding region jutting out on a right side from the first central region, and a first left-side protruding region jutting out on a left side from the first central region, a ratio of an area of the first left-side protruding region to an area of the first right-side protruding region being a first range of 0.6 to 1.6, the second conductive pattern component, as seen from a position facing the second terminal from the shunt resistor, including a second central region connecting the right-side end and the left-side end of the shunt resistor to a right-side end and a left-side end of the second terminal, a second right-side protruding region jutting out on the right side from the second central region, and a second left-side protruding region jutting out on the left side from the second central region, a ratio of an area of the second left-side protruding region to an area of the second right-side protruding region being in a second range of 0.6 to 1.6, the second conductive pattern component including a cutout defining an area that corrects a direction of the current flowing from the shunt resistor, and when the area of the second right-side protruding region and the area of the second left-side protruding region are different, and when a protruding distance of the second right-side protruding region using the right-side end of the shunt resistor as a reference and a protruding distance of the second left-side protruding region using the left-side end of the shunt resistor as a reference are different, the cutout being provided in whichever of the second right-side protruding region and the second left-side protruding region having a larger area and a larger protruding distance. ### Claim 6 (depends on 1) The inverter device according to claim 1, wherein the shunt resistor includes a group of plural resistors connected in parallel to each other. ### Claim 7 (depends on 2) The inverter device according to claim 2, wherein at least one of the first conductive pattern component and the second conductive pattern component includes a cutout defining an area that corrects a direction of the current flowing to the shunt resistor. ### Claim 8 (depends on 2) The inverter device according to claim 2, wherein the shunt resistor includes a group of plural resistors connected in parallel to each other. ### Claim 9 (depends on 5) The inverter device according to claim 5, wherein the shunt resistor includes a group of plural resistors connected in parallel to each other. ### Claim 10 (depends on 3) The inverter device according to claim 3, wherein the shunt resistor includes a group of plural resistors connected in parallel to each other. ### Claim 11 (depends on 4) The inverter device according to claim 4, wherein the shunt resistor includes a group of plural resistors connected in parallel to each other.