Method and apparatus for producing a speed control voltage for d

Details Method and apparatus for producing a speed control voltage for d Method and apparatus for producing a speed control voltage for d

1987-07-27

1989-08-22

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...

388910, 388933, H02P 500

Patent

active

048599182

ABSTRACT:
A method and means for producing a control voltage for controlling a direct current motor makes use of a tachometer voltage providing two ninety degree phase shifted tachometer signals. From these are derived four coding signals comprising the tachometer signals and their inverse signals. The four signals are combined to produce a triangular signal, which is differentiated. The differentiated signal and its inverse are applied through a switching circuit to produce a control signal.

REFERENCES:
patent: 4008424 (1977-02-01), Bompani
patent: 4228396 (1980-10-01), Palombo et al.
patent: 4270868 (1981-06-01), Morgan et al.
patent: 4414496 (1983-11-01), Watanabe et al.

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