# US 9,438,092 B2 · Electric disk rotor motor and electric bicycle or pedelec comprising a disk rotor motor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,438,092 B2 - Document ID: US9438092B2 - Status: Granted - Kind: B2 - Application number: 13/883,421 - Filed: 2011-11-07 - Published: 2013-10-24 - Granted: 2016-09-06 - Earliest claimed: 2010-11-10 - Assignees: Binova GmbH - Applicants: Christian Becker - Inventors: Christian Becker - Web page: https://patentgrep.com/patent/US9438092B2 ## CPC - H02K 16/02: Machines with one stator and two {or more} rotors - B60L 15/20: for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed - B60L 50/20: using propulsion power generated by humans or animals - B60L 50/52: characterised by DC-motors - B62M 6/55: power-driven at crank shafts parts - H02K 1/148: {Sectional cores (H02K1/141 takes precedence)} - H02K 3/30: Windings characterised by the insulating material - H02K 21/24: with magnets axially facing the armatures, e.g. hub-type cycle dynamos - B60L 2200/12: Bikes - B60L 2240/423: Torque - Y02T 10/64: Electric machine technologies in electromobility - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/72: Electric energy management in electromobility - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - 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 - B62M: RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR {SINGLE-TRACK} CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES (arrangements or mounting of transmissions in vehicles in general B60K; transmission elements per se F16) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An electric disk-armature motor includes at least one stator in the form of a disk, at least one rotor in the form of an armature disk which is mounted rotatably about an axis of rotation with respect to the stator and/or a motor housing. The rotor and the stator are oriented parallel to one another and are spaced apart from one another by a gap. An end side of the rotor, which end side faces the stator, has a multiplicity of permanent magnets polarized in the axial direction, which are arranged in the form of a ring around the axis of rotation. A north pole and a south pole faces the stator alternately in the tangential direction, and wherein the stator has a multiplicity of coil elements. An electric bicycle or pedelec comprises such a disk-armature motor. ## Claims ### Claim 1 An electric disk-armature motor for an electric bicycle or pedelec, comprising: a stator in the form of a disk, and a first rotor in the form of an armature disk which is mounted rotatably about an axis of rotation with respect to the stator, wherein the first rotor and the stator are oriented parallel to one another and are spaced apart from one another by a gap, wherein an end side of the first rotor, which end side faces the stator, has a multiplicity of permanent magnets polarized in the axial direction, which permanent magnets are arranged in the form of a ring around the axis of rotation, wherein a north pole and a south pole faces the stator alternately in the tangential direction, wherein the stator has a multiplicity of coil elements, which are arranged in the form of a ring around the axis of rotation of the first rotor, wherein the stator is arranged between the first rotor and a second rotor, which are each mounted rotatably about the axis of rotation, wherein the coil elements of the stator are arranged in such a way that each respective coil axis is tangential to a circle having a center at the axis of rotation, wherein the coil elements each have a coil former with a coil core around which a coil wire is wound, wherein the coil core has, at its opposite ends along the coil axis, two mutually opposite pole bodies, which extend in the axial and/or radial direction in relation to the axis of rotation of the first rotor on both sides beyond the coil core, and wherein both pole bodies of each coil element each form pole faces, which each face the first or second rotor and are opposite the permanent magnets of the faced rotor, characterized in that the pole bodies are aligned radially in relation to the axis of rotation of the first rotor, with the result that a circumferential distance between the two pole bodies of a coil element increases as the two pole bodies extend farther from the axis of rotation of the first rotor, and in that the coil core is a flat body, whose radial extent in relation to the axis of rotation of the first rotor is larger than its axial extent. ### Claim 2 (depends on 1) The disk-armature motor as claimed in claim 1, characterized in that the pole faces are formed on a widened portion of the pole body, which widened portion is tangential in relation to the axis of rotation of the first rotor. ### Claim 3 (depends on 2) The disk-armature motor as claimed in claim 2, characterized in that the tangential widened portion of the pole body comprises a widened portion in the direction of the respective other pole body of the same coil element. ### Claim 4 (depends on 1) The disk-armature motor as claimed in claim 1, characterized in that the pole bodies are aligned radially in relation to the axis of rotation of the rotor, with the result that the tangential extent of the coil element increases as the radial distance from the axis of rotation of the first rotor increases. ### Claim 5 (depends on 1) The disk-armature motor as claimed in claim 1, characterized in that the coil core is a flat body, whose tangential length in relation to the axis of rotation of the first rotor is at least double its axial length. ### Claim 6 (depends on 1) The disk-armature motor as claimed in claim 1, characterized in that the coil formers consist partially or entirely of a magnetic polymer and/or of metal. ### Claim 7 (depends on 1) The disk-armature motor as claimed in one of claim 1, characterized in that the first and second rotors and/or the stator are manufactured in an injection molding process with inserts. ### Claim 8 (depends on 1) An electric disk-armature motor as claimed in claim 1, characterized in that the disk-armature motor is arranged between a bottom bracket and a chain ring on the pedal spindle of the electric bicycle or pedelec, wherein the first and second rotors are connected to the pedal spindle in such a way that the first and second rotors can transmit a torque to the pedal spindle. ### Claim 9 (depends on 8) The electric disk-armature motor as claimed in claim 8, characterized in that the transmission of the torque from the first and second rotors to the pedal spindle is performed via a direct fixed connection or toothed connection, without a transmission thread.