Motor speed control apparatus

Details Motor speed control apparatus Motor speed control apparatus

1988-03-16

1989-09-05

Shoop, Jr., William M.

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

Armature control by digital or combined analog and digital...

388810, 388900, H02P 500

Patent

active

048642002

ABSTRACT:
A speed detector outputs a deviation, from a desired rotation speed, of the rotation speed of a capstan motor for driving a tape. A phase detector outputs a phase deviation, from a reference signal, of a reproduction control signal. When in a recording mode, in which only speed control is effected, the capstan motor is driven on the basis of a signal obtained by integrating the integration output of the speed detector. When in a reproduction mode, in which speed and phase controls are effected, the capstan motor is driven on the basis of a signal obtained by adding the deviation output of the speed detector to a signal derived by integrating the deviation output of the phase detector. Further, the capstan motor is driven on the basis of the integration data, which is stored in a data register in the reproduction mode, at the time of transition from the reproduction mode to the recording mode.

REFERENCES:
patent: 4203061 (1980-05-01), Minakuchi
patent: 4386300 (1983-05-01), Ogawa
patent: 4418304 (1983-11-01), Iwai
patent: 4591768 (1986-05-01), Kudelski
patent: 4613799 (1986-09-01), Sumi
patent: 4680516 (1987-07-01), Guzik et al.
patent: 4739238 (1988-04-01), Sonobe et al.
Kornhaas et al., "So funktioniert ein Videorecorder", Funkschau, No. 13, 1984.

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