# US 12,014,869 B2 · Magnetic field drive system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,014,869 B2 - Document ID: US12014869B2 - Status: Granted - Kind: B2 - Application number: 17/298,220 - Filed: 2019-11-01 - Published: 2022-04-21 - Granted: 2024-06-18 - Earliest claimed: 2018-11-28 - Assignees: Iucf-Hyu (Industry-University Cooperation Foundation Hanyang University) - Applicants: Iucf-Hyu (Industry-University Cooperation Foundation Hanyang University) - Inventors: Gun Hee Jang; Won Seo Lee - Web page: https://patentgrep.com/patent/US12014869B2 ## CPC - A61B 34/73: {Manipulators for magnetic surgery} - H01F 7/064: {Circuit arrangements for actuating electromagnets (circuit arrangements for obtaining special operating characteristics H01F7/18; driving circuits for electromagnets making use of a switching regulator H01H47/325)} - A61B 34/35: for telesurgery - H01F 7/20: without armatures (cores H01F3/00; coils H01F5/00 {; shaping metal by applying magnetic forces B21D26/14; electromagnets specially adapted for NMR applications G01R33/381}) - H01F 27/24: Magnetic cores - H01F 27/28: Coils; Windings; Conductive connections - A61B 2017/00345: {Micromachines, nanomachines, microsystems} - A61B 2034/731: {Arrangement of the coils or magnets} - A61B 2034/732: {arranged around the patient, e.g. in a gantry} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract A magnetic field drive system is disclosed. The magnetic field drive system comprises: a rail; a first magnetic field generation unit provided on the rail; and a second magnetic field generation unit provided on the rail, and arranged to face the first magnetic field generation unit with a target area therebetween, wherein the first magnetic field generation unit and the second magnetic field generation unit can generate magnetic field in the target area. ## Claims ### Claim 1 A magnetic field drive system comprising: a rail; a first magnetic field generation unit installed on the rail; and a second magnetic field generation unit installed on the rail while facing the first magnetic field generation unit with a target area interposed therebetween, wherein the first and second magnetic field generation units generate a magnetic field in the target area, wherein the first magnetic field generation unit includes: a first support frame installed on the rail; at least one first magnetic core supported by the first support frame and having ends disposed toward the target area; and a first coil wound around each of the first magnetic cores, wherein the second magnetic field generation unit includes: a second support frame installed on the rail while facing the first support frame; at least one second magnetic core supported by the second support frame and having ends disposed toward the target area; and a second coil wound around each of the second magnetic cores, wherein the first and second magnetic cores, the first and second support frames and the rail are formed of a magnetic material, and wherein the magnetic field formed in the target area, and magnetic fields formed in the first magnetic core, the first support frame, the rail, the second support frame and the second magnetic core, respectively, constitute a closed magnetic circuit. ### Claim 2 (depends on 1) The magnetic field drive system of claim 1, further comprising: a driving unit configured to move the first and second magnetic field generation units along the rail. ### Claim 3 (depends on 1) The magnetic field drive system of claim 1, wherein the first magnetic field generation unit includes a first core variable module configured to move the first magnetic core along the first support frame, and wherein the second magnetic field generation unit includes a second core variable module configured to move the second magnetic core along the second support frame. ### Claim 4 (depends on 3) The magnetic field drive system of claim 3, wherein the first core variable module is configured to individually move the first magnetic cores, and the second core variable module is configured to individually move the second magnetic cores. ### Claim 5 (depends on 3) The magnetic field drive system of claim 3, wherein the first core variable module is configured to linearly move the first magnetic core in a direction of a central axis of the first magnetic core, and the second core variable module is configured to linearly move the second magnetic core in a direction of a central axis of the second magnetic core. ### Claim 6 (depends on 3) The magnetic field drive system of claim 3, wherein the first and second support frames have ring or arc shapes, respectively, and centers thereof are located on a same axis. ### Claim 7 A magnetic field drive system comprising: a rail; a first magnetic field generation unit installed on the rail; and a second magnetic field generation unit installed on the rail while facing the first magnetic field generation unit with a target area interposed therebetween, wherein the first and second magnetic field generation units generate a magnetic field in the target area, wherein the first magnetic field generation unit includes: a first support frame installed on the rail; at least one first magnetic core supported by the first support frame and having ends disposed toward the target area; and a first coil wound around each of the first magnetic cores, wherein the second magnetic field generation unit includes: a second support frame installed on the rail while facing the first support frame; at least one second magnetic core supported by the second support frame and having ends disposed toward the target area; and a second coil wound around each of the second magnetic cores, and wherein the magnetic field drive system further includes: a power supply unit configured to supply power to the first coil through a first circuit and supply power to the second coil through a second circuit; and variable capacitors provided in the first circuit and the second circuit, respectively. ### Claim 8 A magnetic field drive system comprising: a rail; a first magnetic field generation unit installed on the rail; and a second magnetic field generation unit installed on the rail while facing the first magnetic field generation unit with a target area interposed therebetween, wherein the first and second magnetic field generation units generate a magnetic field in the target area, wherein the first magnetic field generation unit includes: a first support frame installed on the rail; at least one first magnetic core supported by the first support frame and having ends disposed toward the target area; and a first coil wound around each of the first magnetic cores, wherein the second magnetic field generation unit includes: a second support frame installed on the rail while facing the first support frame; at least one second magnetic core supported by the second support frame and having ends disposed toward the target area; and a second coil wound around each of the second magnetic cores, and wherein the first support frame has a structure in which a plurality of base frames formed of a magnetic material are stacked. ### Claim 9 (depends on 8) The magnetic field drive system of claim 8, wherein the base frames have a same radius as the first support frame, and are located on a same central axis. ### Claim 10 A magnetic field drive system comprising: a rail; a first magnetic field generation unit installed on the rail; and a second magnetic field generation unit installed on the rail while facing the first magnetic field generation unit with a target area interposed therebetween, wherein the first and second magnetic field generation units generate a magnetic field in the target area, wherein the first magnetic field generation unit includes: a first support frame installed on the rail; at least one first magnetic core supported by the first support frame and having ends disposed toward the target area; and a first coil wound around each of the first magnetic cores, wherein the second magnetic field generation unit includes: a second support frame installed on the rail while facing the first support frame; at least one second magnetic core supported by the second support frame and having ends disposed toward the target area; and a second coil wound around each of the second magnetic cores, wherein the first magnetic core has a structure in which a plurality of base frames formed of a magnetic material are stacked, and wherein the base frames have a same length as the first magnetic core. ### Claim 11 A magnetic field drive system comprising: a rail; a first magnetic field generation unit installed on the rail; and a second magnetic field generation unit installed on the rail while facing the first magnetic field generation unit with a target area interposed therebetween, wherein the first and second magnetic field generation units generate a magnetic field in the target area, wherein the first magnetic field generation unit includes: a first support frame installed on the rail; at least one first magnetic core supported by the first support frame and having ends disposed toward the target area; and a first coil wound around each of the first magnetic cores, wherein the second magnetic field generation unit includes: a second support frame installed on the rail while facing the first support frame; at least one second magnetic core supported by the second support frame and having ends disposed toward the target area; and a second coil wound around each of the second magnetic cores, wherein the rail has a structure in which a plurality of base frames formed of a magnetic material are stacked, and wherein the base frames have a same length as the rail. ### Claim 12 (depends on 1) The magnetic field drive system of claim 1, wherein the first magnetic core includes: a first core housing having an outer side surface around which the first coil is wound, an inner space, and one end in which an opening is formed; a first auxiliary core inserted into the inner space through the opening; and a first core driving unit configured to linearly move the first auxiliary core in a central direction thereof. ### Claim 13 (depends on 12) The magnetic field drive system of claim 12, wherein a central axis of the first core housing and a central axis of the first auxiliary core are located on a same line. ### Claim 14 (depends on 12) The magnetic field drive system of claim 12, wherein a central axis of the first core housing is parallel with a central axis of the first auxiliary core. ### Claim 15 (depends on 12) The magnetic field drive system of claim 12, wherein a plurality of openings are formed at one end of the first core housing, a plurality of first auxiliary cores are inserted into the openings, respectively, and the first core driving unit is configured to individually move the first auxiliary cores. ### Claim 16 (depends on 15) The magnetic field drive system of claim 15, wherein the openings have mutually different sizes, and the first auxiliary cores have sizes corresponding to the openings, respectively.