Title:
ROTATION CONTROLLER
Document Type and Number:
Japanese Patent JP3216306
Kind Code:
B2
Abstract:
PURPOSE: To provide a controller for allowing quick rise of rotational speed and rotational phase of a rotator upto target levels.
CONSTITUTION: A controller is started to raise the rotational speed of a rotator upto a first target speed which is different by 1/5-1/6 from a final target speed (Step ST1, 2). When the first target speed is reached, phase difference is monitored between an external reference signal corresponding to the final target speed and the rotator. When the difference comes within a predetermined range, acceleration from the first target speed to the final target speed is started (Step ST3, 4). The phase difference range is set such that the rotational phase is matched with that of the reference signal upon reaching the final target speed.
Inventors:
Youko Sano
Yasuhiro Ogawa
Koji Okumoto
Yasuhiro Ogawa
Koji Okumoto
Application Number:
JP6115193A
Publication Date:
October 09, 2001
Filing Date:
February 25, 1993
Export Citation:
Assignee:
ソニー株式会社
International Classes:
G11B15/467; G11B15/473; G11B15/48; G11B19/247; G11B19/28; H02P29/00; H02P29/20; (IPC1-7): H02P5/00; G11B15/467; G11B15/473; G11B15/48; G11B19/247
Domestic Patent References:
| JP4193086A |
Attorney, Agent or Firm:
Akira Koike (2 outside)