What is claimed is:
1. A motor structure comprising:
a stator, comprising:
a coil assembly, including:
a ring-shaped slot having an inner periphery on its inner side and an outer periphery on its outer side away from said inner periphery;
a plurality of first teeth mounted around said inner periphery of said ring-shaped slot; and
a plurality of second teeth mounted around said outer periphery of the ring-shaped slot, wherein each of said first teeth is arranged to partly fall behind said corresponding second tooth; and
a coil wound in said ring-shaped slot; and
a rotor including a circular magnet located above said coil.
2. The motor structure according to claim 1, wherein said teeth shapes are selected as one configuration from a group consisting of chamfered teeth, teeth with round top corners, and teeth with indentations.
3. The motor structure according to claim 1, further comprising:
a base on which said coil assembly is mounted.
4. The motor structure according to claim 3, wherein a ring-shaped concavity is formed on said base for allowing said coil assembly to be mounted therein.
5. The motor structure according to claim 3, wherein:
said stator further comprising:
a static shaft substantially perpendicular to and fixed on said base; and
a ring-shaped groove being formed around said static shaft;
said rotor further comprising:
a hub in which a through hole is formed;
a metal sheet arranged between said hub and said circular magnet; and
a bearing positioned in said through hole and being penetrated by said static shaft.
6. The motor structure according to claim 5, further comprising:
an engagement ring positioned in said through hole and on said bearing for fixing said bearing; and
an elastic ring positioned in said ring-shaped groove for elastically fixing said bearing.
7. A motor structure comprising:
a stator, comprising:
a coil assembly, including:
a ring-shaped slot having an inner periphery on its inner side and an outer periphery on its outer side away from said inner periphery;
a plurality of first teeth mounted around said inner periphery of said ring-shaped slot; and
a plurality of second teeth mounted around said outer periphery of the ring-shaped slot, wherein each of said first teeth is arranged to partly exceed the corresponding tooth of said second teeth; and
a coil wound in said ring-shaped slot; and
a rotor including a circular magnet located above said coil.
8. The motor structure according to claim 7, wherein said teeth shapes are selected as one configuration from a group consisting of chamfered teeth, teeth with round top corners, and teeth with indentations.
9. The motor structure according to claim 7, further comprises a base, said coil assembly being mounted on said base.
10. The motor structure according to claim 9, wherein a ring-shaped concavity is formed on said base for said coil assembly to be mounted therein.
11. The motor structure according to claim 9, wherein:
said stator further comprising:
a static shaft substantially perpendicular to and fixed on said base; and
a ring-shaped groove being formed around said static shaft;
said rotor further comprising:
a hub in which a through hole is formed;
a metal sheet arranged between said hub and said circular magnet; and
a bearing positioned in said through hole and being penetrated by said static shaft.
12. The motor structure according to claim 11, further comprising:
an engagement ring positioned in said through hole and on said bearing for fixing said bearing; and
an elastic ring positioned in said ring-shaped groove for elastically fixing said bearing.
13. A stator structure comprising:
a ring-shaped slot having an inner periphery on its inner side and an outer periphery on its outer side away from said inner periphery;
a plurality of first teeth mounted around said inner periphery of said ring-shaped slot; and
a plurality of second teeth mounted around said outer periphery of the ring-shaped slot, wherein each of said first teeth is arranged to partly fall behind or exceed the corresponding tooth of said second teeth.
14. The stator structure according to claim 13, wherein said first and second teeth are shaped as one configuration selected from a group consisting of chamfered teeth, teeth with round top corners, and teeth with indentations.
15. The stator structure according to claim 13, wherein the number of said first teeth is unequal to that of said second teeth.
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. A video server, comprising:
a recording device configured to encode a video signal into video data based on a predetermined encoding method;
a write controller configured to divide the video data into a plurality of divided data, generate redundant data for restoring the divided data, and perform write control of the plurality of divided data and the plurality of redundant data;
a plurality of storage devices configured to record the divided data and the redundant data, the divided data distributed across the plurality of storage devices according to the write control performed by the write controller; and
a main controller configured to record management information associated with the video data recorded on each storage device.
2. The video server of claim 1, wherein, if one of the plurality of storage devices is to be exchanged with a replacement storage device,
the main controller selects priority video data to be reconstructed by choosing a segment of video data among the video data recorded on the plurality of storage devices based on priority information in the management information; and
the write controller reads the selected priority video data recorded on each storage device except for the storage device to be exchanged, generates the divided data and the redundant data which were recorded on the storage device to be exchanged based on the read selected priority video, and writes the divided data and the redundant data to the replacement storage device.
3. The video server of claim 1, wherein,
the management information comprises a recording time, a material ID, and a frame length for the recorded video data, and
the main controller is configured to select the priority video data based at least in part on the recording time.
4. The video server of claim 2, wherein,
the management information comprises a programmed playback time, a material ID, and a frame length of video data; and
the main controller is configured to select the priority video data based at least in part on the programmed playback time.
5. The video server of claim 2, wherein,
the management information comprises a playback priority, a material ID, and a frame length of video data; and
the main controller is configured to select the priority video data based at least in part on the playback priority.
6. The video server of claim 1, wherein, if one of the plurality of storage devices is exchanged,
the main controller outputs the management information to the write controller,
the write controller selects priority video data to be reconstructed by choosing a segment of video data among the video data recorded on the plurality of storage devices based on the management information; and
the write controller reads the selected priority video data recorded on each storage device except for the storage device to be exchanged, generates the divided data and the redundant data which were recorded on the storage device to be exchanged based on the read selected priority video, and writes the divided data and the redundant data to the replacement storage device.
7. The video server of claim 6, wherein,
the management information comprises a recording time, a material ID, and a frame length for the recorded video data, and
the priority video data is selected based at least in part on the recording time.
8. The video server of claim 6, wherein,
the management information comprises a programmed playback time, a material ID, and a frame length of video data; and the priority video data is selected based at least in part on the programmed playback time.
9. The video server of claim 2 wherein the priority video data to be selected to be reconstructed can be located at any memory location within the plurality of storage devices.
10. A video recording method, comprising,
generating a video data by encoding a received video signal based on a predetermined encoding method;
generating divided data by dividing the video data;
generating redundant data for restoring the divided data;
writing the divided data and the redundant data to a plurality of storage devices; and
recording management information of the video data.
11. The method of claim 10, wherein, if one of the plurality of storage devices is to be exchanged with a replacement storage device,
selecting a priority video data to be reconstructed by choosing a segment of video data among the video data recorded on the plurality of storage devices based on priority information in the management information;
reading the selected priority video data recorded on each storage device except for the storage device to be exchanged;
generating the divided data and the redundant data which were recorded on the storage device to be exchanged based on the read selected priority video; and
writing the divided data and the redundant data to the replacement storage device.
12. The method of claim 11 wherein the priority video data to be selected to be reconstructed can be located at any memory location within the plurality of storage devices.
13. The method of claim 11, wherein,
the management information comprises a recording time, a material ID, and a frame length for the recorded video data, and
the priority video data is selected based at least in part on the recording time.
14. The method of claim 11, wherein,
the management information comprises a programmed playback time, a material ID, and a frame length of video data; and
the main controller is configured to select the priority video data based at least in part on the programmed playback time.
15. The method of claim 11, wherein,
the management information comprises a playback priority, a material ID, and a frame length of video data; and
the main controller is configured to select the priority video data based at least in part on the playback priority.
16. A method rebuilding video in a video server comprising,
determining that a storage device among a plurality of storage devices requires exchanging with a replacement storage device;
choosing a priority video data for reconstructing based on management information recorded when video data was recorded;
reading video data recorded on the plurality of storage device other than the storage device that requires exchanging corresponding to the priority video data;
generating divided data and redundant data which were recorded on the storage device requiring exchange based on the recorded video data; and
writing the generated dividing data and the generated redundant data on the replacement storage device.
17. The method of claim 16, wherein,
the management information comprises a recording time, a material ID, and a frame length for the recorded video data, and
the priority video data is selected based at least in part on the recording time.
18. The method of claim 16, wherein,
the management information comprises a programmed playback time, a material ID, and a frame length of video data; and
the main controller is configured to select the priority video data based at least in part on the programmed playback time.
19. The method of claim 16, wherein,
the management information comprises a playback priority, a material ID, and a frame length of video data; and
the main controller is configured to select the priority video data based at least in part on the playback priority.
20. The method of claim 16 wherein the priority video data chosen to be reconstructed can be located at any memory location within the plurality of storage devices.