1. A system for identifying an optimal route in a network, comprising:
a destination node having an associated node address;
a source node having an associated node address; and
a plurality of intermediate nodes each having an associated node address, the plurality of intermediate nodes including a plurality of neighboring nodes associated with the source node;
wherein the node addresses associated respectively with the destination node and the plurality of intermediate nodes include location information associated respectively with the destination node and the plurality of intermediate nodes;
wherein the source node is configured to select one or more of the plurality of neighboring nodes to receive a route request, the selection of the selected one or more neighboring nodes being based on the location information associated with the destination node and the selected one or more neighboring nodes;
wherein one or more of the selected one or more neighboring nodes propagate their route requests received from the source node to the destination node along one or more routes, each of the one or more routes including one or more of the plurality of intermediate nodes; and
wherein the destination node is configured to:
receive the route requests propagated by one or more of the selected one or more neighboring nodes, the route requests respectively identifying the one or more routes; and
select the optimal route from the one or more routes based on the received route requests.
2. The system of claim 1 wherein the node addresses respectively associated with the destination node, the source node and the plurality of intermediate nodes are based on Ipv6 (Internet Protocol version 6).
3. The system of claim 1 wherein the location information associated respectively with the destination node and the plurality of intermediate nodes includes longitudinal and latitudinal information that can be used to derive corresponding geographical locations of the destination node and the plurality of intermediate nodes.
4. The system of claim 3 wherein the corresponding geographical locations of the selected one or more neighboring nodes and the destination node are used by the source node to make the selection.
5. The system of claim 4 wherein the selected one or more neighboring nodes are geographically located in the direction of the destination node.
6. The system of claim 1 wherein the source node is further configured to communicate with one or more of the plurality of neighboring nodes that are not selected to receive a route request while the route request is being forwarded to the selected one or more neighboring nodes.
7. The system of claim 1 wherein the source node further includes a transceiver having a plurality of transmission antennas;
wherein one or more of the plurality of transmission antennas are selectively used to forward the route request to the selected one or more neighboring nodes; and
wherein the one or more of the plurality of transmission antennas are respectively aimed in the direction of the selected one or more neighboring nodes.
8. The system of claim 7 wherein the plurality of transmission antennas are formed from a plurality of antenna panels.
9. The system of claim 7 wherein the plurality of transmission antennas are formed from a plurality of parasitic elements.
10. The system of claim 7 wherein the source node and the plurality of neighboring nodes are configured to communicate with each other via radio frequencies.
11. The system of claim 1 wherein the route request includes route requirements; and
wherein the one or more of the plurality of intermediate nodes included in each of the one or more routes are able to satisfy the route requirements.
12. The system of claim 11 wherein the route requirements include at least one of a bandwidth requirement and a quality of service requirement.
13. The system of claim 11 wherein the route requirements are specified either as a minimum or a range.
14. The system of claim 11 wherein the optimal route is selected based on one or more of a plurality of factors including a number of intermediate nodes traversed and an amount of resources that are available to satisfy the route requirements.
15. The system of claim 1 wherein the node address associated with the source node includes location information associated with the source node; and
wherein the selection of the selected one or more neighboring nodes is further based on specified geographic confines, wherein the specified geographic confines are derived based on the location information of the source and destination nodes and are adjustable.
16. The system of claim 15 wherein the selected one or more neighboring nodes are located within the specified geographic confines.
17. The system of claim 1 wherein the source node and the plurality of intermediate nodes are configured to cache route data and use the route data to optimize route selection to the destination node.
18. The system of claim 1 wherein the source node and the destination node include mobile devices.
19. The system of claim 1 wherein the plurality of intermediate nodes includes at least a router configured to provide an alternative connection to the destination node.
20. The system of claim 19 wherein the alternative connection includes an external network.
21. The system of claim 1 wherein the one or more of the selected one or more neighboring nodes are configured to select zero, one or more of its plurality of neighboring nodes to receive the propagated route request.
22. The system of claim 21 wherein the selection of the selected one or more neighboring nodes by the neighboring node being based on a geographic direction to the destination node.
23. The system of claim 21 wherein the selection of the selected one or more neighboring nodes by the neighboring node being based on specified geographic confines, wherein the specified geographic confines are derived based on the location information of the selected one or more neighboring nodes and the destination node and are adjustable.
24. The system of claim 23 wherein the selected one or more neighboring nodes are located within the specified geographic confines.
25. A system for identifying an optimal route in a network, comprising:
a destination node having an associated node address;
a source node having an associated node address; and
a plurality of intermediate nodes each having an associated node address, the plurality of intermediate nodes including a plurality of neighboring nodes associated with the source node;
wherein the node addresses associated respectively with the destination node and the plurality of intermediate nodes include location information associated respectively with the destination node and the plurality of intermediate nodes;
wherein the source node is configured to select a first neighboring node and a second neighboring node from the plurality of neighboring nodes to receive a route request, the selection of the first and second neighboring nodes being based on the location information associated with the destination node and the first and second neighboring nodes;
wherein the first neighboring node propagates its route request received from the source node to the destination node along a first route, and the second neighboring node propagates its route request received from the source node the destination node along a second route, each of the first and second routes including one or more of the plurality of intermediate nodes; and
wherein the destination node is configured to:
receive the route requests propagated by the first and second neighboring nodes, the route requests respectively identifying the first and second routes; and
select the optimal route from the first and second routes based on the received route requests.
26. The system of claim 25 wherein the node addresses respectively associated with the destination node, the source node and the plurality of intermediate nodes are based on Ipv6 (Internet Protocol version 6).
27. The system of claim 25 wherein the location information associated respectively with the destination node and the plurality of intermediate nodes include longitudinal and latitudinal information that can be used to derive the corresponding geographical locations of the destination node and the plurality of intermediate nodes.
28. The system of claim 27 wherein the corresponding geographical locations of the first and second neighboring nodes and the destination node are used by the source node to make the selection.
29. The system of claim 28 wherein the first and second neighboring nodes are geographically located in the direction of the destination node.
30. The system of claim 25 wherein the source node is further configured to communicate with one or more of the plurality of neighboring nodes that are not selected to receive route request while the route request is being forwarded to the first and second neighboring nodes.
31. The system of claim 25 wherein the source node further includes a transceiver having a plurality of transmission antennas;
wherein one or more of the plurality of transmission antennas are selectively used to forward the route request to the first and second neighboring nodes; and
wherein the one or more of the plurality of transmission antennas are respectively aimed in the direction of the first and second neighboring nodes.
32. The system of claim 31 wherein the source node and the plurality of neighboring nodes are configured to communicate with each other via radio frequencies.
33. The system of claim 31 wherein the plurality of transmission antennas are formed from a plurality of antenna panels.
34. The system of claim 31 wherein the plurality of transmission antennas are formed from a plurality of parasitic elements.
35. The system of claim 25 wherein the route request includes route requirements; and
wherein the one or more of the plurality of intermediate nodes included in each of the first and second routes are able to satisfy the route requirements.
36. The system of claim 35 wherein the route requirements include at least one of a bandwidth requirement and a quality of service requirement.
37. The system of claim 35 wherein the route requirements are specified either as a minimum or a range.
38. The system of claim 35 wherein the optimal route is selected based on one or more of a plurality of factors including number of intermediate nodes traversed and amount of resources that are available to satisfy the route requirements.
39. The system of claim 25 wherein the node address associated with the source node includes location information associated with the source node; and
wherein the selection of the first and second neighboring nodes is further based on specified geographic confines, wherein the specified geographic confines are derived based on the location information of the source and destination nodes and are adjustable.
40. The system of claim 39 wherein the first and second neighboring nodes are located within the specified geographic confines.
41. The system of claim 25 wherein the source node and the plurality of intermediate nodes are configured to cache route data and use the route data to optimize route selection to the destination node.
42. The system of claim 25 wherein the source node and the destination node include mobile devices.
43. The system of claim 25 wherein the plurality of intermediate nodes includes at least a router configured to provide an alternative connection to the destination node.
44. The system of claim 43 wherein the alternative connection includes an external network.
45. The system of claim 25 wherein the one or more of the selected first and second neighboring nodes are configured to select zero, one or more of its plurality of neighboring nodes to receive the propagated route request.
46. The system of claim 45 wherein the selection of the selected first and second neighboring nodes by the neighboring node being based on a geographic direction to the destination node.
47. A method for identifying an optimal route in a network, the network having a destination node having an associated node address, a source node having an associated node address and a plurality of intermediate nodes each having an associated node address, the plurality of intermediate nodes including a plurality of neighboring nodes associated with the source node, wherein the node addresses associated respectively with the destination node and the plurality of intermediate nodes include location information associated respectively with the destination node and the plurality of intermediate nodes, the method comprising:
providing a node address associated with the destination node, the node address comprising the location information association with the destination node;
directing the source node to select one or more of the plurality of neighboring nodes to receive a route request, the selection of the selected one or more neighboring nodes being based on the location information associated with the destination node and the selected one or more neighboring nodes;
directing one or more of the selected one or more neighboring nodes to propagate their route requests received from the source node to the destination node along one or more routes, each of the one or more routes including one or more of the plurality of intermediate nodes;
and directing the destination node to receive the route requests propagated by one or more of the selected one or more neighboring nodes, the route requests respectively identifying the one or more routes, and select the optimal route from the one or more routes based on the received route requests.
48. The method of claim 47 wherein the node addresses respectively associated with the destination node, the source node and the plurality of intermediate nodes are based on Ipv6 (Internet Protocol version 6).
49. The method of claim 47 wherein the location information associated respectively with the destination node and the plurality of intermediate nodes include longitudinal and latitudinal information that can be used to derive the corresponding geographical locations of the destination node and the plurality of intermediate nodes.
50. The method of claim 49 wherein the corresponding geographical locations of the selected one or more neighboring nodes and the destination node are used by the source node to make the selection.
51. The method of claim 50 wherein the selected one or more neighboring nodes are geographically located in the direction of the destination node.
52. The method of claim 47 further comprising:
directing the source node to communicate with one or more of the plurality of neighboring nodes that are not selected to receive route request while the route request is being forwarded to the selected one or more neighboring nodes.
53. The method of claim 47 wherein the source node further includes a transceiver having a plurality of transmission antennas, the method further comprising:
directing the source node to selectively use one or more of the plurality of transmission antennas to forward the route request to the selected one or more neighboring nodes;
wherein the one or more of the plurality of transmission antennas are respectively aimed in the direction of the selected one or more neighboring nodes.
54. The method of claim 53 wherein the plurality of transmission antennas are formed from a plurality of antenna panels.
55. The method of claim 53 wherein the plurality of transmission antenna are formed from a plurality of parasitic elements.
56. The method of claim 53 further comprising:
configuring the source node and the plurality of neighboring nodes to communicate with each other via radio frequencies.
57. The method of claim 47 wherein the route request includes route requirements; and
wherein the one or more of the plurality of intermediate nodes included in each of the one or more routes are able to satisfy the route requirements.
58. The method of claim 57 wherein the route requirements include at least one of a bandwidth requirement and a quality of service requirement.
59. The method of claim 57 wherein the route requirements are specified either as a minimum or a range.
60. The method of claim 57 wherein the optimal route is selected based on one or more of a plurality of factors including number of intermediate nodes traversed and amount of resources that are available to satisfy the route requirements.
61. The method of claim 47 wherein the node address associated with the source node includes location information associated with the source node; and
wherein the selection of the selected one or more neighboring nodes is further based on specified geographic confines, wherein the specified geographic confines are derived based on the location information of the source and destination nodes and are adjustable.
62. The method of claim 61 wherein the selected one or more neighboring nodes are located within the specified geographic confines.
63. The method of claim 47 further comprising:
configuring the source node and the plurality of intermediate nodes to cache route data and use the route data to optimize route selection to the destination node.
64. The method of claim 47 wherein the source node and the destination node include mobile devices.
65. The method of claim 47 wherein the plurality of intermediate nodes includes at least a router configured to provide an alternative connection to the destination node.
66. The method of claim 65 wherein the alternative connection includes an external network.
67. The method of claim 47 wherein the one or more of the selected one or more neighboring nodes are configured to select zero, one or more of its plurality of neighboring nodes to receive the propagated route request.
68. The method of claim 67 wherein the selection of the selected one or more neighboring nodes by the neighboring node being based on a geographic direction to the destination node.
69. The method of claim 67 wherein the selection of the selected one or more neighboring nodes by the neighboring node being based on specified geographic confines, wherein the specified geographic confines are derived based on the location information of the selected one or more neighboring nodes and the destination node and are adjustable.
70. The method of claim 69 wherein the selected one or more neighboring nodes are located within the specified geographic confines.
71. A node for use in identifying an optimal route in a network, the node comprising:
a node address comprising location information associated with the node;
wherein the node is configured to operate in a source mode, a neighboring mode and a destination mode;
wherein, in the source mode, the node is configured to select one or more of a plurality of neighboring nodes to receive a route request, the selection of the selected one or more neighboring nodes being based on location information associated with a destination node and the neighboring nodes;
wherein, in the neighboring mode, the node is configured to selectively propagate a received route request by selecting zero, one or more of the plurality of neighboring nodes to receive the received route request, the selection of the selected neighboring nodes being based on the location information associated with a destination node and the neighboring nodes; and
wherein, in the destination mode, the node is configured to:
receive one or more route requests propagated by a respective one or more neighboring nodes, each route request identifying a respective route; and
select the optimal route from the one or more routes based on the received route requests.
72. The node of claim 71 further comprising:
a transceiver having a plurality of transmission antennas;
wherein one or more of the plurality of transmission antennas are selectively used to forward the new route request to the selected one or more neighboring nodes; and
wherein the one or more of the plurality of transmission antennas are respectively pointed in the direction of the selected one or more neighboring nodes.
73. The node of claim 71 wherein, in the source mode and the neighboring mode, the selected one or more of the plurality of neighboring nodes being based on a geographic direction from the node to the destination node.
74. The node of claim 71 wherein, in the source mode and the neighboring mode, the node is further configured to communicate with one or more of the plurality of neighboring nodes that are not selected to receive the route request while the route request is being forwarded to the selected one or more neighboring nodes.
75. The node of claim 71 wherein the selection of the selected one or more neighboring nodes in the source mode and the neighboring mode is further based on specified geographic confines, wherein the specified geographic confines are derived based on the location information of the node and the destination node and are adjustable.
76. The node of claim 75 wherein the selected one or more neighboring nodes are located within the specified geographic confines.
77. The node of claim 71 wherein the node comprises a mobile device.
78. The node of claim 71 wherein the plurality of intermediate nodes includes at least a router configured to provide an alternative connection to the destination node.
79. The node of claim 78 wherein the alternative connection includes an external network.
80. The node of claim 71 wherein the selected one or more of the plurality of neighboring nodes comprises a selected plurality of neighboring nodes.
81. A method for identifying optimal routes in a network, the network having a plurality of nodes each having an associated node address identifying a geographic location, the method comprising, at a node:
providing a node address associated with the node, the node address comprising the location information associated with the node;
selecting one or more of a plurality of neighboring nodes to receive a new route request comprising a destination node, the act of selecting based on location information associated with the destination node and the plurality of neighboring nodes;
selectively propagating a received route request by selecting zero, one or more of the plurality of neighboring nodes to receive the received route request, the act of selecting based on the location information associated with a destination node and the plurality of neighboring nodes; and
receiving one or more route requests identifying the node as a destination node and propagated by a respective one or more of the plurality of neighboring nodes, each route request identifying a respective route; and
selecting an optimal route from the one or more routes based on the received route requests identifying the node as the destination node.
82. The method of claim 81 further comprising, at a node:
sending the new route request message to the selected one or more of a plurality of neighboring nodes;
timing out waiting for an acknowledgement of a destination node receiving the new route request; and
selecting, in response to timing out, one or more additional neighboring nodes to receive the new route request.
83. The method of claim 81 further comprising:
selecting one or more of a plurality of transmission antennas to transmit the route request to the selected one or more of a plurality of neighboring nodes based on a location of the selected one or more of a plurality of neighboring nodes;
wherein the one or more of the plurality of transmission antennas are respectively pointed in the direction of the selected one or more neighboring nodes.
84. The method of claim 81 wherein the act of selecting the one or more of the plurality of neighboring nodes and the act of selectively propagating are based on specified geographic confines, wherein the specified geographic confines are derived based on the location information of the node and the destination node and are adjustable.
85. The method of claim 84 wherein the selected one or more neighboring nodes are located within the specified geographic confines.
86. The node of claim 81 further comprising selecting a router configured to provide an alternative connection to the destination node.
87. The method of claim 86 wherein the alternative connection includes an external network.
88. The method of claim 81 wherein the act of selecting the one or more of the plurality neighboring nodes is based on a geographic direction from the node to the destination node, and wherein the act of selectively propagating the received route request is based on a geographic direction from the node to the destination node.
89. The method of claim 81 wherein the act of selecting the one or more of the plurality neighboring nodes comprises selecting a plurality of neighboring nodes, and wherein the act of selectively propagating the received route request comprises selecting a plurality of neighboring nodes.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1-21. (canceled)
22. A synchronous motor comprising:
a rotor having a plurality of magnetic poles arranged around a circumference of the rotor at an equal interval; and
a stator having a plurality of stator teeth arranged around a circumference of the stator, the stator teeth radially protruding from an annular yoke of the stator and differing in number from the magnetic poles, wherein
the stator teeth form a plurality of stator teeth groups, each of the stator teeth groups including a predetermined number of stator teeth consecutive around the circumference of the stator, and the stator teeth groups being arranged circumferentially at an equal interval,
the predetermined number of stator teeth are arranged at an interval different from the interval of the magnetic poles of the rotor,
for each stator tooth among the predetermined number of stator teeth, a main coil included in a coil of one phase is wound around at least one of two sections of the yoke respectively located between the stator tooth and a stator tooth adjacent on either side,
in at least one of the predetermined number of stator teeth in a certain stator teeth group, in addition to the main coil, a sub-coil included in a coil of a different phase than the one phase is wound around the at least one of two sections of the yoke,
the sub-coil is connected in series with the main coil included in another stator teeth group located at a different electrical angle than the certain stator teeth group, and
the number of turns in each coil and a direction in which each coil is wound are set to compensate for a difference between a timing at which a magnetic field produced at each stator tooth by applying alternating current to each coil is at a maximum value and a timing at which a point between adjacent magnetic poles passes by the stator tooth as the rotor rotates.
23. The synchronous motor of claim 22, wherein
the other stator teeth group located at the different electrical angle than the certain stator teeth group is adjacent to the certain stator teeth group.
24. The synchronous motor of claim 22, wherein
for each of the stator teeth groups, a sub-coil is wound in correspondence with each of at least two of the predetermined number of stator teeth, and
the coil of one phase includes, by connection in series, every main coil corresponding to the stator teeth included in a certain stator teeth group, the sub-coil corresponding to one of the stator teeth included in one of the stator teeth groups located ahead of the certain stator teeth group in electrical angle, and the sub-coil corresponding to one of the stator teeth included in one of the stator teeth groups located behind the certain stator teeth group in electrical angle.
25. The synchronous motor of claim 22, wherein
in each stator teeth group, only the main coil is wound in correspondence with a first stator tooth among the predetermined number of stator teeth, and the main coil and the sub-coil are wound in correspondence with a second stator tooth adjacent to the first stator tooth, and
a coil ratio between the main coil and the sub-coil wound in correspondence with the second stator tooth is set so that when the first stator tooth and the magnetic poles of the rotor are in a predetermined positional relationship, the magnetic field produced at the first stator tooth is at the maximum value, and when the rotor rotates so that the second stator tooth and the magnetic poles of the rotor are in the same positional relationship as the predetermined positional relationship, the magnetic field produced at the second stator tooth is at the maximum value.
26. The synchronous motor of claim 25, wherein
in each stator teeth group, the number of turns in the main coil wound in correspondence with the first stator tooth, and the number of turns in the main coil and the number of turns in the sub-coil wound in correspondence with the second stator tooth, are set so that the maximum value of the magnetic field produced at the first stator tooth and the maximum value of the magnetic field produced at the second stator tooth are equal.
27. The synchronous motor of claim 22, wherein
a coil coefficient \u03b1 is defined such that when the number of the magnetic poles is A, A being an even integer two or greater, the number of stator teeth is B, B being a multiple of three not equal to A, the number of magnetic pole pairs P is A2, m is a positive integer, and k is the number of stator teeth per phase equaling B3, then
when k=3m, \u03b1=|2\u03c0A\u22122\u03c0B|\xd7P, and
when k=3m+1, or when k=3m+2, \u03b1=|2\u03c0A\u22122\u03c0B||P2, and
when six coils of the same phase are respectively wound around six adjacent sections of the yoke and are connected in series, ratios of numbers of turns of each coil being, in order, +N1, \u2212N2, +N3, \u2212N3, +N2, and \u2212N1, +Nn being the same number of turns as \u2212Nn yet wound in an opposite direction, n being 1, 2, or 3,
N1 is approximately equal to sin(\u03b1),
N2 is approximately equal to sin(\u03b1)+sin(\u03c03\u2212\u03b1), and
N3 is approximately equal to sin(\u03c03)+sin(\u03c03\u2212\u03b1).
28. The synchronous motor of claim 22, wherein
the rotor rotates around the stator with the stator at a center of rotation,
the stator teeth radially protrude outward from a peripheral surface of the stator yoke,
a plurality of inner stator teeth, equal in number to the outer stator teeth, are further provided protruding inwards from an inner peripheral surface of the stator yoke in a direction opposite the stator teeth that protrude outward, and
the synchronous motor further comprises a rotor rotating along an inner periphery of the stator.
29. The synchronous motor of claim 22, wherein
at least one of the stator teeth is in a skew arrangement by being circumferentially skewed progressively along an axis direction of the rotor by, at most, the interval between the stator teeth.
30. The synchronous motor of claim 22, wherein
the synchronous motor is an Interior Permanent Magnet Motor.
31. The synchronous motor of claim 22, wherein
the sections of the yoke include first sections, around each of which a coil of one of three phases is wound by concentrated winding, and second sections, around each of which coils of two of three phases are wound by concentrated winding, and
a phase of one coil among the coils wound around one of the second sections adjacent to one of the first sections is the same phase as the coil wound around the one of the first sections.
32. The synchronous motor of claim 31, wherein
a coil coefficient \u03b1 is defined such that when the number of the magnetic poles is A, the number of stator teeth is B, the number of magnetic pole pairs P is A2, m is a positive integer, and k is the number of stator teeth per phase equaling B3, then
when k=3m, \u03b1=|2\u03c0A\u22122\u03c0B|\xd7P,
when k=3m+1, or when k=3m+2, \u03b1=|2\u03c0A\u22122\u03c0B|\xd7P2, and
when a coil of one of three phases or coils of two of three phases are wound around each section of the yoke by concentrated winding, and the number of turns of the coil wound around each first section is N1, then among the coils wound around one of the first sections and one of the second sections adjacent thereto, the number of turns of a coil of a first phase is approximately equal to (N1)\xd7sin(\u03b1)sin(\u03c03), and the number of turns of a coil of a second phase is approximately equal to (N1)\xd7sin(\u03c03\u2212\u03b1)sin(\u03c03).
33. The synchronous motor of claim 31, wherein
the number of turns in the coil in each first section equals a sum of the number of turns in the coils in one of the second sections.
34. The synchronous motor of claim 22, wherein
a coil coefficient \u03b1 is defined such that when the number of the magnetic poles is A, the number of stator teeth is B, the number of magnetic pole pairs P is A2, m is a positive integer, and k is the number of stator teeth per phase equaling B3, then
when k=3m, \u03b1=|2\u03c0A\u22122\u03c0B|\xd7P,
when k=3m+1, or when k=3m+2, \u03b1=|2\u03c0A\u22122\u03c0B|\xd7P2, and
when a coil of a first phase and a coil of a second phase, the first and the second phase being any two of three phases, are wound around a section of the yoke by concentrated winding, a ratio of number of turns of the coil of the first phase to the number of turns of the coil of the second phase is approximately equal to a ratio of sin(\u03b1)sin(\u03c03) to sin(\u03c03\u2212\u03b1)sin(\u03c03).
35. The synchronous motor of claim 22, wherein
the sub-coil has fewer turns than the main coil.
36. A synchronous motor driving system formed by a synchronous motor and a corresponding actuator device, wherein
the synchronous motor comprises:
a rotor having a plurality of magnetic poles arranged around a circumference of the rotor at an equal interval;
a stator having a plurality of stator teeth radially protruding from an annular yoke of the stator and differing in number from the magnetic poles; and
a stator coil by each of the stator teeth, the stator coil including, by connection in series, a first coil wound around a section of the yoke between the stator tooth and a stator tooth adjacent on one side, and a second coil wound around a section of the yoke between the stator tooth and a stator tooth adjacent on another side, the second coil being wound in an opposite direction from the first coil, wherein
a plurality of stator coils form stator coil groups, each stator coil group including m stator coils consecutive around a circumference of the stator, m being an integer two or greater, and the stator coil groups being arranged circumferentially at an equal interval,
at least a pair of adjacent stator coils among the stator coils in each stator coil group are arranged at a different interval than the interval between the magnetic poles of the rotor,
a stator coil adjacent to one of the at least a pair of adjacent stator coils is further wound around at least one section of the yoke around which the one of the at least a pair of adjacent stator coils is wound, and
the actuator device provides currents of different phases to the at least a pair of adjacent stator coils, the currents being set to compensate for a difference between a timing at which a magnetic field produced at each stator tooth is at a maximum value and a timing at which a point between magnetic poles passes by the stator tooth as the rotor rotates.
37. The synchronous motor driving system of claim 36, wherein
each of the at least a pair of adjacent stator coils is connected at one end to an individual external terminal and at another end to one of the stator coils included in a different stator coil group.
38. The synchronous motor driving system of claim 37, wherein
the stator coils are arranged so that an interval between adjacent stator coil groups corresponds to 2\u03c03 radians in electrical angle,
each of the at least a pair of adjacent stator coils is connected at the other end to another stator coil located at a position differing by 2\u03c03 radians in electrical angle, and
the actuator device provides currents that differ in phase by 2\u03c03 radians respectively to a first stator coil included in any one of the stator coil groups and to a second stator coil corresponding to the first stator coil and included in an adjacent stator coil group.
39. The synchronous motor driving system of claim 36, wherein
the pair of adjacent stator coils in each stator coil group produce magnetic fields of opposite polarity when current of the same phase is provided via the external terminals connected thereto, and
the actuator device provides currents that differ in phase within a range of \xb12\u03c03m radians respectively to the pair of adjacent stator coils in each stator coil group.
40. The synchronous motor driving system of claim 36, wherein
the pair of adjacent stator coils in each stator coil group produce magnetic fields of identical polarity when current of the same phase is provided via the external terminals connected thereto, and
the actuator device provides currents that differ in phase within a range of it \xb12\u03c03m radians respectively to the pair of adjacent stator coils in each stator coil group.
41. The synchronous motor driving system of claim 36, wherein
each stator coil group includes a first stator coil, a second stator coil, and a third stator coil,
the first stator coil is provided at a position \u03c0 radians ahead of the second stator coil in electrical angle along a direction of rotation,
the third stator coil is provided at a position \u03c0 radians behind the second stator coil in electrical angle along the direction of rotation,
the first, second, and third stator coils are respectively connected to individual external terminals, and adjacent stator coils produce magnetic fields of opposite polarity when current of the same phase is provided via the external terminals connected thereto, and
for each stator group, the actuator device provides, to the first stator coil, current of a phase that is behind a phase of current provided to the second stator coil and provides, to the third stator coil, current of a phase that is ahead of the phase of current provided to the second stator coil.
42. The synchronous motor driving system of claim 39, wherein
the position at which the first stator coil is provided is, at most, \u03c0+\u03c03m radians ahead of the second stator coil in electrical angle along the direction of rotation,
the position at which the third stator coil is provided is, at most, \u03c0+\u03c03m radians behind the second stator coil in electrical angle along the direction of rotation,
the phase of the current provided to the first stator coil is, at most, \u03c03m radians behind the phase of the current provided to the second stator coil, and
the phase of the current provided to the third stator coil is, at most, \u03c03m radians ahead of the phase of the current provided to the second stator coil.
43. The synchronous motor driving system of claim 35, wherein
the m stator coils in each stator coil group are arranged at an equal interval differing from the interval between the magnetic poles of the rotor.
44. The synchronous motor driving system of claim 35, wherein
the m stator coils in each stator coil group are respectively connected to individual external terminals.