# US 8,543,365 B1 · Computer-readable medium, a method and an apparatus for designing and simulating electrodynamic machines implementing conical and cylindrical magnets > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,543,365 B1 - Document ID: US8543365B1 - Status: Granted - Kind: B1 - Application number: 11/707,285 - Filed: 2007-02-12 - Granted: 2013-09-24 - Earliest claimed: 2004-10-25 - Assignees: NovaTorque, Inc. - Applicants: John Patrick Petro; Ken George Wasson - Inventors: John Patrick Petro; Ken George Wasson - Web page: https://patentgrep.com/patent/US8543365B1 ## CPC - H02K 1/14: Stator cores with salient poles - H02K 16/00: Machines with more than one rotor or stator {(machines for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts H02K51/00; permanent magnet machines with multiple rotors or stators relatively rotated for vectorially combining the excitation fields or the armature voltages H02K21/029)} - H02K 21/12: with stationary armatures and rotating magnets - H02K 2201/03: Machines characterised by aspects of the air-gap between rotor and stator - H02K 2201/06: Magnetic cores, or permanent magnets characterised by their skew - H02K 2201/12: Transversal flux machines - H02K 2213/03: Machines characterised by numerical values, ranges, mathematical expressions or similar information - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A method, apparatus, system and computer-readable medium for designing and/or simulating electrodynamic machinery are disclosed to, among other things, optimize one or more performance characteristics by manipulating structural and/or functional characteristics of the constituent components of an electrodynamic machine. According to the various embodiments, a motor designer can create a new motor design by modeling a rotor-stator structure to design and/or simulate electrodynamic machines that implement, for example, conically shaped magnets and accompanying field pole members. ## Claims ### Claim 1 A method for designing a rotor-stator structure for an electrodynamic machine, the method comprising: selecting active field pole members including coils at least one of which has a coil length parallel to an axis of rotation, selecting said active field pole members comprising: selecting pole faces to confront conical surfaces of rotors disposed axially from each other, selecting said pole faces comprising: determining a flux in a coil region of an active field pole member to produce a value of torque, said coil region being disposed within said coil length; selecting a magnet material to produce a flux density at an air gap formed between a surface of said magnet material and a pole face of said active field pole member; calculating, in a processor, a surface area of said pole face at which said flux density of said magnet material provides for said flux in said coil region to approximate said value of torque; and determining a non-orthogonal angle at which to orient said pole face relative to said axis of rotation to establish said surface area for said pole face; and sizing said coil length while maintaining a cross-sectional area associated with said active field pole members to adjust said value of torque as one or more performance characteristics. ### Claim 2 (depends on 1) The method of claim 1 wherein selecting said active field pole members comprises: arranging said active field pole members in an arrangement having said cross-sectional area, wherein said arrangement of said active field pole members is coaxial to the axis of rotation. ### Claim 3 (depends on 2) The method of claim 2 wherein arranging said active field pole members in said arrangement further comprises: forming a stator assembly. ### Claim 4 (depends on 1) The method of claim 1 wherein selecting said active field pole members comprises: selecting contoured pole faces associated with said active field pole members. ### Claim 5 (depends on 1) The method of claim 1 wherein sizing said coil length further comprises: adjusting a motor efficiency value representing a motor efficiency as said performance characteristic. ### Claim 6 (depends on 1) The method of claim 1 wherein sizing said coil length further comprises: adjusting a motor constant value representing a motor constant, Km, as said performance characteristic. ### Claim 7 (depends on 1) The method of claim 1 wherein sizing said coil length further comprises: adjusting a torque value representing said value of torque as said performance characteristic while maintaining an input power. ### Claim 8 (depends on 1) The method of claim 1 wherein sizing said coil length further comprises: sizing said coil length to form a first size to establish one value of said one or more performance characteristics; sizing said coil length to form a second size to establish another value of one or more performance characteristics; and implementing a magnet with either said first size or said second size of said coil length. ### Claim 9 (depends on 1) The method of claim 1 wherein selecting said active field pole members further comprises: selecting contoured pole faces to confront at least a portion of a conical magnet. ### Claim 10 (depends on 1) The method of claim 1 wherein selecting said active field pole members further comprises: selecting contoured pole faces to confront at least a portion of a cylindrical magnet. ### Claim 11 (depends on 1) The method of claim 1 further comprising: adjusting the length of one or more field pole members. ### Claim 12 (depends on 1) The method of claim 1 wherein sizing said coil length further comprises: maintaining a wire diameter for said coil. ### Claim 13 (depends on 1) The method of claim 1 wherein sizing said coil length further comprises: maintaining a coil diameter for said coil. ### Claim 14 (depends on 1) The method of claim 1 wherein said cross-sectional area is coextensive with a diameter of a stator assembly. ### Claim 15 A non-transitory computer-readable medium for designing a rotor-stator structure for an electrodynamic machine, the computer-readable medium, comprising executable instructions to: select active field pole members including coils at least one of which has a coil length parallel to an axis of rotation; select pole faces to confront conical surfaces of rotors disposed axially from each other, selecting said pole faces comprising: determine a flux in a coil region of an active field pole member to produce a value of torque, said coil region being disposed within said coil length; select a magnet material to produce a flux density at an air gap formed between a surface of said magnet material and a pole face of said active field pole member; calculate, in a processor, a surface area of said pole face at which said flux density of said magnet material provides for said flux in said coil region to approximate said value of torque; and determine a non-orthogonal angle at which to orient said pole face relative to said axis of rotation to establish said surface area for said pole face; and size said coil length while maintaining a cross-sectional area associated with said active field pole members to adjust said value of torque as one or more performance characteristics. ### Claim 16 (depends on 15) The computer-readable medium of claim 15 wherein said executable instructions to select said active field pole members comprise executable instructions to: arrange said active field pole members in an arrangement having said cross-sectional area, wherein said arrangement of said active field pole members is coaxial to the axis of rotation. ### Claim 17 (depends on 16) The computer-readable medium of claim 16 wherein said executable instructions to arrange said active field pole members in said arrangement further comprises executable instructions to: form a stator assembly. ### Claim 18 (depends on 15) The computer-readable medium of claim 15 wherein said executable instructions to select said active field pole members comprise executable instructions to: select contoured pole faces associated with said active field pole members. ### Claim 19 (depends on 15) The computer-readable medium of claim 15 wherein said executable instructions to size said coil length further comprise executable instructions to: adjust a motor efficiency value representing a motor efficiency as said performance characteristic. ### Claim 20 (depends on 15) The computer-readable medium of claim 15 wherein said executable instructions to size said coil length further comprise executable instructions to: adjust a second motor constant value representing a motor constant, Km, as said performance characteristic. ### Claim 21 (depends on 15) The computer-readable medium of claim 15 wherein said executable instructions to size said coil length further comprise executable instructions to: adjust a torque value representing said value of torque as said performance characteristic while maintaining an input power. ### Claim 22 (depends on 15) The computer-readable medium of claim 15 wherein said executable instructions to size said coil length further comprise executable instructions to: size said coil length to form a first size to establish one value of said one or more performance characteristics; size said coil length to form a second size to establish another value of said one or more performance characteristics; and implement a magnet with either said first size or said second size of said coil length. ### Claim 23 (depends on 15) The computer-readable medium of claim 15 wherein said executable instructions to select said active field pole members comprise executable instructions to: select contoured pole faces to confront at least a portion of a conical magnet. ### Claim 24 (depends on 15) The computer-readable medium of claim 15 wherein said executable instructions to select said active field pole member comprise executable instructions to: select contoured pole faces to confront at least a portion of a cylindrical magnet. ### Claim 25 (depends on 15) The computer-readable medium of claim 15 further comprising executable instructions to: adjust the length of one or more field pole members. ### Claim 26 (depends on 15) The computer-readable medium of claim 15 wherein said executable instructions to size said coil length further comprise executable instructions to: maintain a wire diameter for said coil. ### Claim 27 (depends on 15) The computer-readable medium of claim 15 wherein said executable instructions to size said coil length further comprise executable instructions to: maintain a coil diameter for said coil. ### Claim 28 (depends on 15) The computer-readable medium of claim 15 wherein said cross-sectional area is coextensive with a diameter of a stator assembly.