# US 7,608,967 B2 · Single field rotor motor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,608,967 B2 - Document ID: US7608967B2 - Status: Granted - Kind: B2 - Application number: 11/443,945 - Filed: 2006-05-30 - Published: 2007-12-06 - Granted: 2009-10-27 - Earliest claimed: 2006-05-30 - Assignees: Tri-Seven Research, Inc. - Inventors: Gary L. Durham; Harold S. Durham - Web page: https://patentgrep.com/patent/US7608967B2 ## CPC - H02K 21/44: with armature windings wound upon the magnets - H02K 19/103: {Motors having windings on the stator and a variable reluctance soft-iron rotor without windings} - H02K 19/20: with variable-reluctance soft-iron rotors without winding - H02K 21/16: having annular armature cores with salient poles (with homopolar co-operation H02K21/20) - H02K 2201/12: Transversal flux machines - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A single field rotor motor comprising a rotor mounted for rotation with respect to a stator. The stator has a plurality of stator poles each having a coil for creating a magnetic pole force. The rotor has a plurality of circumferentially spaced salient rotor poles formed thereon, wherein the flux within the rotor maintains a constant polarity. Magnetic means are provided for creating a pair of magnetic flux fields, wherein interaction of the pair of magnetic flux fields causes the magnetic flux fields to spray radially outward with respect to the rotor, thereby creating uniform magnetic polarity on the rotor poles. Circuit means are provided for alternately charging said stator coils to alternate the polarity of a given stator pole to alternately attract and repel said rotor poles to produce rotation of said rotor. ## Claims ### Claim 1 A single field rotor motor comprising: a stator having a plurality of stator poles, each of said stator poles having a coil for creating a magnetic pole force; a rotor mounted for rotation with respect to said stator and having a plurality of circumferentially spaced salient rotor poles formed thereon; magnetic means for creating a pair of magnetic flux fields wherein interaction of said pair of magnetic flux fields causes said magnetic flux fields to spray radially outward with respect to said rotor, thereby creating uniform magnetic polarity on said rotor poles; and circuit means for alternately charging said stator coils to alternate the polarity of a given stator pole to alternately attract and repel said rotor poles to produce rotation of said rotor. ### Claim 2 (depends on 1) The single field rotor motor stated in claim 1, further comprising: said stator poles numbering twice the number of rotor poles. ### Claim 3 (depends on 1) The single field rotor motor stated in claim 1, further comprising: a small, changing, radial air gap between said stator poles and said rotor. ### Claim 4 (depends on 1) The single field rotor motor stated in claim 1, further comprising: said stator having extensions for transferring magnetic flux between said stator and rotor across a small, unchanging, radial air gap. ### Claim 5 (depends on 1) The single field rotor motor stated in claim 1, further comprising: said stator having extensions for transferring magnetic flux between said stator and rotor across a small, unchanging, axial air gap. ### Claim 6 (depends on 1) The single field rotor motor stated in claim 1, further comprising; a stator housing fabricated from a magnetically non-conductive material; and each said stator pole having a laminated, modular stator section. ### Claim 7 (depends on 1) The single field rotor motor stated in claim 1, further comprising: said pair of magnetic flux fields are substantially toroidal. ### Claim 8 (depends on 1) The single field rotor motor stated in claim 1, further comprising: a stator housing fabricated from a magnetically conductive material for transferring magnetic flux between said stator and said rotor. ### Claim 9 (depends on 1) The single field rotor motor stated in claim 1, said magnetic means comprising a plurality of magnets circumferentially spaced around said rotor. ### Claim 10 A single field rotor motor comprising: a stator having a plurality of stator poles, each of said stator poles having a coil for creating a magnetic pole force; a rotor mounted for rotation with respect to said stator and having a radial periphery having a plurality of circumferentially spaced magnets to define a plurality of spaced salient rotor poles of uniform magnetic polarity, there being twice the number of stator poles than rotor poles, and a small, changing, radial air gap between said stator poles and said rotor poles; circuit means for alternately charging said stator coils to alternate the polarity of a given stator pole to alternately attract and repel said rotor poles to produce rotation of said rotor; and a pair of magnetically conductive pole surfaces positioned adjacent to opposite axial ends of said rotor for transferring magnetic flux from said stator to said rotor across a small, unchanging axial air gap. ### Claim 11 (depends on 10) The single field rotor motor stated in claim 10, further comprising: a stator housing fabricated from a magnetically conductive material for transferring magnetic flux between said stator and said rotor. ### Claim 12 (depends on 10) The single field rotor motor stated in claim 10, further comprising: a stator housing fabricated from a magnetically non-conductive material; and each said stator pole having a laminated, modular stator section. ### Claim 13 (depends on 12) The single field rotor motor stated in claim 12, further comprising: said stator having extensions for transferring magnetic flux between said stator and rotor across a small, unchanging, radial air gap. ### Claim 14 (depends on 12) The single field rotor motor stated in claim 12, further comprising: said stator having extensions for transferring magnetic flux between said stator and rotor across a small, unchanging, axial air gap. ### Claim 15 (depends on 10) The single field rotor motor stated in claim 10, further comprising: adjacent rotor poles of said plurality of rotor poles having equal spacing. ### Claim 16 (depends on 10) The single field rotor motor stated in claim 10, further comprising: adjacent stator poles of said plurality of stator poles having equal spacing. ### Claim 17 (depends on 1) The single field rotor motor stated in claim 1, further comprising: a pair of magnetically conductive pole surfaces positioned adjacent to opposite axial ends of said rotor for transferring magnetic flux between said stator and said rotor across a small unchanging axial air gap.