Electricity: motive power systems – Limitation of motor load – current – torque or force
Patent
1998-11-12
2000-02-08
Masih, Karen
Electricity: motive power systems
Limitation of motor load, current, torque or force
318560, 360 9701, 360 99, H01R 3946
Patent
active
060231408
ABSTRACT:
A magnetic disc which can easily detect the pole position of a brushless DC motor at a standstill, a magnetic disc apparatus employing the magnetic disc and a motor driving method are provided. The magnetic disc includes a first plane and a second plane opposite to the first plane on/from which data is recorded or the recorded data is read. Each plane is provided with a data recording zone where data is stored and a parking zone. A pole information recording zone, disposed between the data recording zone and the parking zone on at least one side of the first and second planes of the magnetic disc, stores the information of a motor pole. This information indicates the rotation position of a brushless DC motor at a start-up time and is used during the start-up phase to begin rotating the motor in the proper direction so as not to damage the disc.
REFERENCES:
patent: 4306259 (1981-12-01), Saito et al.
patent: 4874976 (1989-10-01), Ohsawa et al.
Joo Sung-jun
Kim Heui-wook
Masih Karen
Samsung Electronics Co,. Ltd.
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