Title:
ROTATION CONTROLLER OF MOTOR
Document Type and Number:
Japanese Patent JPS6020777
Kind Code:
A
Abstract:
PURPOSE:To shorten the time from a start to phase lock-in by operating phase control means when the rotating speed of a motor at the motor starting time becomes substantially the same rotating speed at the phase lock-in time. CONSTITUTION:When the start signal (b) of a motor becomes H level, a phase comparator 8 is released from its reset, but its output (h) is in the state of the intermediate level. The rotating speed of the motor 1 is controlled to rotate at the same rotating speed as that after the phase lock-in by the output (h). When the rotating speed of the motor 1 becomes the same rotating speed as that after the phase lock-in, the output (c) of a rotation variation detector 14 becomes H level. Thus, D flip-flops 16, 17 are set, and the comparator 8 outputs a phase comparison signal (h). Thus, the time from the start to the phase lock-in can be shortened.
Inventors:
OKITA MASAYA
SAWADA MASAHIRO
OOTA MASA
SAWADA MASAHIRO
OOTA MASA
Application Number:
JP12686183A
Publication Date:
February 02, 1985
Filing Date:
July 14, 1983
Export Citation:
Assignee:
NIPPON KOGAKU KK
International Classes:
H02P1/16; G11B19/28; H04N1/21; (IPC1-7): H02P1/16
Domestic Patent References:
| JPS5436514A | 1979-03-17 | |||
| JPS5436515A | 1979-03-17 | |||
| JPS607478A | 1985-01-16 | |||
| JPS5819311B2 | 1983-04-18 |
Attorney, Agent or Firm:
Masatoshi Sato