# US 2013/0278368 A1 · Rectifier transformer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0278368 A1 - Document ID: US20130278368A1 - Status: Published application - Kind: A1 - Application number: 13/976,884 - Filed: 2011-12-27 - Published: 2013-10-24 - Earliest claimed: 2010-12-30 - Assignees: ALSTOM Technology Ltd - Inventors: Serge Tirilly; Triomphant Ngnegueu; David Marnay - Web page: https://patentgrep.com/patent/US20130278368A1 ## CPC - H01F 27/2847: {Sheets; Strips (H01F27/2866 takes precedence)} - H01F 27/40: Structural association with built-in electric component, e.g. fuse - H01F 29/146: {Constructional details} - H02M 7/068: {mounted on a transformer} - H01F 27/408: {Association with diode or rectifier} - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - 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) ## Abstract A rectifier transformer including at least one secondary with windings, one pair of magnetic transductors per winding, one of the transductors having one or more first busbars and the other having one or more second busbars. All of the busbars of the pair of transductors are connected to the same winding. The or each first or second, busbar is connected to a single positive or negative, terminal (2w+) designed to be connected to a positive or negative, arm of the rectifier. All of the busbars of the pair of magnetic transductors form one or more groups that are encircled by at least one magnetic toroid and that comprise at least one first busbar and at least one second busbar, so that, when the terminals are short-circuited, the busbars of a group pass currents of opposite directions such that the sum of the currents in one direction is equal to the sum of the currents in the other direction. ## Claims ### Claim 1 A rectifier transformer including, in a tank, at least one primary, at least one secondary with phase windings, one pair of magnetic transductors per phase winding, one of the transductors having one or more first busbars and the other having one or more second busbars, all of the first and second busbars of the pair of transductors being connected via one end to the same phase winding, the or each first busbar being connected via another end to a single positive outlet connection terminal (2w+) designed to be connected to a positive arm of the rectifier, the or each second busbar being connected via another end to a single negative outlet connection terminal (2w−) designed to be connected to a negative arm of the rectifier, said rectifier transformer being characterized in that all of the busbars of the pair of magnetic transductors form one or more groups, each group being encircled by a magnetic toroid, or by a set of magnetic toroids and comprising one or more first busbars and one or more second busbars in such a manner that when the outlet connection terminals are short-circuited and when the transformer is being fed with AC via its primary, the busbars of a group pass currents of opposite directions such that the current or the sum of the currents in one direction is substantially equal to the current or to the sum of the currents in the other direction. ### Claim 2 (depends on 1) The rectifier transformer according to claim 1, wherein when there are a plurality of first busbars and/or a plurality of second busbars in the pair of magnetic transductors, the first busbars are connected in parallel and/or the second busbars are connected in parallel. ### Claim 3 (depends on 1) The rectifier transformer according to claim 1, wherein in the pair of magnetic transductors, the number of first busbars is equal to the number of second busbars or indeed the number of first busbars is different from the number of second busbars. ### Claim 4 (depends on 1) The rectifier transformer according to claim 1, wherein in a group of busbars encircled by a magnetic toroid or by a set of magnetic toroids, the first busbars are closer to said magnetic toroid or to the magnetic toroids of said set of magnetic toroids than the or each second busbar. ### Claim 5 (depends on 1) The rectifier transformer according to claim 1, wherein in a group of busbars encircled by a magnetic toroid or by a set of magnetic toroids, the second busbars encircled by said magnetic toroid or by said set of magnetic toroids are closer to said magnetic toroid or to the magnetic toroids of said set of magnetic toroids than the or each first busbar. ### Claim 6 (depends on 1) The rectifier transformer according to claim 1, wherein a first busbar or a second busbar of a group is interposed between two second busbars or two first busbars of the group. ### Claim 7 (depends on 1) The rectifier transformer according to claim 1, wherein two first busbars or two second busbars of the same magnetic transductor are encircled by distinct magnetic toroids or by distinct sets of magnetic toroids. ### Claim 8 (depends on 1) The rectifier transformer according to claim 1, wherein the three windings of the secondary are connected in a delta configuration or in a star configuration. ### Claim 9 (depends on 1) The rectifier transformer according to claim 1, wherein the or each first busbar and the or each second busbar are arranged substantially vertically in the tank. ### Claim 10 (depends on 1) The rectifier transformer according to claim 1, wherein the or each first busbar and the or each second busbar are arranged substantially horizontally in the tank. ### Claim 11 (depends on 1) The rectifier transformer according to claim 1, wherein at least one conductive control loop surrounds the magnetic toroid or all of the magnetic toroids of the set of magnetic toroids. ### Claim 12 (depends on 1) The rectifier transformer according to claim 1, wherein at least one conductive premagnetization loop surrounds the magnetic toroid or all of the magnetic toroids of the set of magnetic toroids.