# US 2014/0192577 A1 · Power conversion device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192577 A1 - Document ID: US20140192577A1 - Status: Published application - Kind: A1 - Application number: 14/238,226 - Filed: 2012-07-18 - Published: 2014-07-10 - Earliest claimed: 2011-08-30 - Assignees: Nissan Motor Co., Ltd. - Inventors: Kentaro Shin; Kraisorn Throngnumachai - Web page: https://patentgrep.com/patent/US20140192577A1 ## CPC - H02M 7/003: {Constructional details, e.g. physical layout, assembly, wiring or busbar connections} - B60L 50/51: characterised by AC-motors - H05K 7/14329: {specially adapted for the configuration of power bus bars} - B60L 2210/40: DC to AC converters - B60L 2270/147: electro magnetic [EMI] - H02M 1/14: Arrangements for reducing ripples from DC input or output - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/72: Electric energy management in electromobility - 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) - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract In the present invention, a power conversion device is provided with an inverter for converting power output from a power source; a first power supply bus, connected to the positive electrode side of the inverter and the power source; a second power supply bus, connected to the negative electrode sides of the inverter and the power source; a first conductor that forms, along with the first power supply bus, a capacitor; a second conductor that forms, along with the second power supply bus, a capacitor; and a connection circuit, comprising a resistor, that electrically connects the first conductor and the second conductor. ## Claims ### Claim 1 A power conversion device comprising: an inverter configured to change electric power outputted from a power supply; a first power supply bus connected to the inverter and a positive electrode of the power supply; a second power supply bus connected to the inverter and a negative electrode of the power supply; a first conductive body forming a capacitor in conjunction with the first power supply bus; a second conductive body forming a capacitor in conjunction with the second power supply bus; and a connection circuit including a resistor and configured to electrically connect the first conductive body and the second conductive body together. ### Claim 2 (depends on 1) The power conversion device according to claim 1, wherein a resistance value of the resistor is higher than a resistance value of any of the first conductive body and the second conductive body. ### Claim 3 (depends on 1) The power conversion device according to claim 1, further comprising: a first dielectric body provided between the first power supply bus and the first conductive body; and a second dielectric body provided between the second power supply bus and the second conductive body. ### Claim 4 (depends on 1) The power conversion device according to claim 1, further comprising: a first dielectric body provided between the first power supply bus and the first conductive body while covering at least part of a surface of the first power supply bus, and made of a resin; and a second dielectric body provided between the second power supply bus and the second conductive body while covering at least part of a surface of the second power supply bus, and made of a resin. ### Claim 5 (depends on 1) The power conversion device according to claim 1, wherein a resistance value of the resistor is set at a value being proportional to a square root of an inductance component between the first power supply bus and the second power supply bus, and being inversely proportional to a square root of a capacitance component between the first power supply bus and the second power supply bus. ### Claim 6 (depends on 1) The power conversion device according to claim 1, wherein a resistance value of the resistor is set at a value being proportional to a square root of a distance between the first power supply bus and the second power supply bus, and being inversely proportional to the area of any of an opposed surface of the first power supply bus facing the second power supply bus and an opposed surface of the second power supply bus facing the first power supply bus. ### Claim 7 (depends on 1) The power conversion device according to claim 1, wherein a resistance value of the resistor is a resistance value higher than a resistance value of any of the first conductive body and the second conductive body, and the resistor is provided to any of the first conductive body and the second conductive body. ### Claim 8 (depends on 1) The power conversion device according to claim 1, wherein the resistor is formed from a slit provided to one of the first conductive body and the second conductive body, the slit rendering the cross-sectional area of a portion of the one of the first conductive body and the second conductive body smaller than the cross-sectional area of another portion of the one of the first conductive body and the second conductive body. ### Claim 9 (depends on 1) The power conversion device according to claim 1, wherein the resistor is made from ferrite contained in any of the first conductive body and the second conductive body. ### Claim 10 (depends on 1) The power conversion device according to claim 1, wherein any of the first conductive body and the second conductive body is made from a metal tape. ### Claim 11 (depends on 1) The power conversion device according to claim 1, wherein a resistance value of the resistor is set in accordance with a frequency of noise generated in any of the power supply buses by a switching operation of the inverter. ### Claim 12 (depends on 3) The power conversion device according to claim 3, wherein the first power supply bus is located at the center of an axis, the first dielectric body covers an outer periphery of the first power supply bus, the first conductive body covers an outer periphery of the first dielectric body, the power conversion device further comprises a first insulating portion covering an outer periphery of the first conductive body, the first power supply bus, the first dielectric body, the first conductive body, and the first insulating portion are concentrically arranged, the second power supply bus is located at the center of an axis, the second dielectric body covers an outer periphery of the second power supply bus, the second conductive body covers an outer periphery of the second dielectric body, the power conversion device further comprises a second insulating portion covering an outer periphery of the second conductive body, and the second power supply bus, the second dielectric body, the second conductive body, and the second insulating portion are concentrically arranged. ### Claim 13 (depends on 1) The power conversion device according to claim 1, wherein each of the first and second power supply buses has a cylindrical shape, each of the first and second conductive bodies has a columnar shape made by bending a flat plate, and is disposed in such a manner as to cover part of a side surface of the corresponding one of the first and second power supply buses. ### Claim 14 (depends on 1) The power conversion device according to claim 1, further comprising a second connection circuit including a resistor and configured to electrically connect the first conductive body and the second conductive body together. ### Claim 15 (depends on 1) The power conversion device according to claim 1, wherein the first conductive body is formed from two conductive bodies each having a flat plate shape, and the power conversion device further comprises a second connection circuit including a resistor and configured to electrically connect the two conductive bodies together.