# US 2014/0152134 A1 · Energy harvesting devices > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152134 A1 - Document ID: US20140152134A1 - Status: Published application - Kind: A1 - Application number: 14/027,458 - Filed: 2013-09-16 - Published: 2014-06-05 - Earliest claimed: 2012-11-30 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Jin-Suk HEO; Kyung Hoon CHO - Web page: https://patentgrep.com/patent/US20140152134A1 ## CPC - H02K 21/00: Synchronous motors having permanent magnets; Synchronous generators having permanent magnets - H02K 99/10: {Generators} - H02K 53/00: Alleged dynamo-electric perpetua mobilia - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract An energy harvesting device includes at least one first magnet configured to rotate along a first circular path in a first plane. The energy harvesting device includes at least one piezo-electric cantilever spaced apart from the first plane, the at least one piezo-electric cantilever being configured to bend in a direction substantially perpendicular to the first plane. The energy harvesting device also includes at least one second magnet coupled to the at least one cantilever and configured to overlap the at least one first magnet. ## Claims ### Claim 1 An energy harvesting device, comprising: at least one first magnet configured to rotate along a first circular path in a first plane; at least one piezo-electric cantilever spaced apart from the first plane, the at least one piezo-electric cantilever being configured to bend in a direction substantially perpendicular to the first plane; and at least one second magnet coupled to the at least one cantilever and configured to overlap the at least one first magnet. ### Claim 2 (depends on 1) The energy harvesting device of claim 1, wherein the at least one first magnet and the at least one second magnet are arranged such that same magnetic poles face each other. ### Claim 3 (depends on 1) The energy harvesting device of claim 1, further comprising: at least one third magnet configured to rotate along a second circular path in a second plane substantially parallel to the first plane, the second circular path having a center coinciding with a center of the first circular path, the at least one third magnet being disposed opposite to the at least one first magnet with respect to the at least one second magnet and having a substantially fixed position relative to the at least one first magnet. ### Claim 4 (depends on 3) The energy harvesting device of claim 3, wherein the at least one first magnet and the at least one second magnet are arranged such that same magnetic poles face each other, and the at least one third magnet and the at least one second magnet are arranged such that same magnetic poles face each other. ### Claim 5 (depends on 4) The energy harvesting device of claim 4, wherein the at least one first magnet and the at least one third magnet are arranged such that the same magnetic poles face a same direction. ### Claim 6 (depends on 1) The energy harvesting device of claim 1, further comprising: a first rotating plate coupled with the at least one first magnet and configured to rotate around a rotational axis; a second rotating plate configured to rotate around the rotational axis for a substantially same number of rotations as a number of rotations of the first rotating plate, the second rotating plate being disposed opposite to the first rotating plate with respect to the at least one second magnet; and at least one third magnet coupled to the second rotating plate and arranged along a second circular path having a diameter substantially the same as a diameter of the first circular path. ### Claim 7 (depends on 6) The energy harvesting device of claim 6, wherein the at least one second magnet includes a fourth magnet facing the at least one first magnet and a fifth magnet facing the at least one third magnet. ### Claim 8 (depends on 6) The energy harvesting device of claim 6, wherein when viewed from the rotational axis, the at least one first magnet and the at least one third magnet are arranged alternately at a regular interval, and the at least one second magnet is disposed between the at least one first magnet and the at least one third magnet. ### Claim 9 (depends on 8) The energy harvesting device of claim 8, further comprising: a support including a ring having a center on the rotational axis, the at least one cantilever being fixed to the support. ### Claim 10 (depends on 9) The energy harvesting device of claim 9, wherein the at least one cantilever has a first end fixed to the ring and a second end extending from the ring. ### Claim 11 (depends on 9) The energy harvesting device of claim 9, wherein the at least one cantilever has a first end fixed to the ring and a second end contained within the ring. ### Claim 12 (depends on 9) The energy harvesting device of claim 9, further comprising: a rectifier coupled to the support and configured to rectify an electric current generated by the at least one cantilever; and a capacitor coupled to the support and configured to store the rectified electric current. ### Claim 13 (depends on 9) The energy harvesting device of claim 9, further comprising: a support including a first ring and a second ring having a common center on the rotational axis, the at least one cantilever being fixed to the support, wherein the at least one cantilever includes, a first cantilever having a first end fixed to the first ring and a second end disposed between the first ring and the second ring; and a second cantilever having a first end fixed to the second ring and a second end disposed between the first ring and the second ring. ### Claim 14 (depends on 6) The energy harvesting device of claim 6, further comprising a power transmission unit configured to convert a load into rotation to be transmitted to the rotational axis, the power transmission unit comprising: a first converting unit configured to convert the load into rectilinear movement; and a second converting unit configured to convert the rectilinear movement into rotational movement. ### Claim 15 (depends on 14) The energy harvesting device of claim 14, wherein the first converting unit includes a pedal, the second converter includes a rack and a pinion engaged with the rack, and the power transmission unit further comprises a pair of gears configured to change a number of rotations of the rotational movement. ### Claim 16 (depends on 1) The energy harvesting device of claim 1, wherein the at least one cantilever includes at least two cantilevers having different lengths. ### Claim 17 (depends on 16) The energy harvesting device of claim 16, further comprising: a support spaced apart from the first circular path and the second circular path such that the support does not overlap first circular path and the second circular path, one end of the at least one cantilever being fixed to the support. ### Claim 18 An energy harvesting device, comprising: a rotating plate configured to rotate around a rotational axis; at least one first magnet on the rotating plate; at least one first piezo-electric cantilever spaced apart from the rotating plate, the at least one cantilever being configured to bend in a direction substantially perpendicular to a rotation plane of the rotating plate; at least one second piezo-electric cantilever spaced apart from the rotating plate, the at least one cantilever being configured to bend in a direction substantially perpendicular to the rotation plane of the rotating plate and disposed opposite to the at least one first cantilever with respect to the rotating plate; at least one second magnet coupled to the at least one first cantilever and overlapping a circular path along which the at least one first magnet rotates when the rotating plate rotates; and at least one third magnet coupled to the at least one second cantilever and overlapping the circular path along which the at least one first magnet rotate when the rotating plate rotates. ### Claim 19 (depends on 18) The energy harvesting device of claim 18, wherein the at least one cantilever includes at least two cantilevers having different lengths. ### Claim 20 An energy harvesting device, comprising: a plurality of supports; a plurality of piezo-electric cantilevers coupled to the supports; a plurality of rotating plates configured to rotate relative to the supports, the rotating plates and the supports being alternately arranged; a plurality of first magnets on the rotating plates; a plurality of second magnets on the cantilevers; and a power transmission unit configured to convert a load into a rotation of the rotating plates, wherein the cantilevers are configured to bend in a direction substantially perpendicular to a rotation plane of the rotating plates as a result of magnetic forces between the first magnets and the second magnets.