Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent
1981-08-27
1984-12-11
Truhe, J. V.
Electricity: motive power systems
Braking
Automatic and/or with time-delay means
318317, 318345B, 320 1, H02P 516
Patent
active
044880960
ABSTRACT:
A first capacitor is discharged with every pulse of a train of pulses of a frequency proportional to the actual speed of a rotary machine under control and is charged up during intervals between these pulses. The voltage of the first capacitor provides a signal to a threshold circuit which operates to provide a second signal whenever the voltage of the first capacitor exceeds a predetermined voltage which may be set in order to set the speed at which the machine is to be controlled. During the presence of the second signal a second capacitor is charged, beginning at a predetermined voltage, preferably zero. The regulating magnitude for the machine to be controlled is derived from the voltage of the second capacitor either directly or indirectly through a controller circuit and a power stage. The circuit is particularly useful for control of the speed of machines that run slowly or can conveniently provide only relatively few speed-indicating pulses per revolution.
REFERENCES:
patent: 3355719 (1967-11-01), Fox
patent: 3946295 (1976-03-01), Moore
patent: 4008426 (1977-02-01), Ogura
patent: 4121141 (1978-10-01), Frazee
patent: 4121273 (1978-10-01), Jarrett et al.
patent: 4177412 (1979-12-01), Minakuchi
patent: 4240014 (1980-12-01), M/u/ ller
patent: 4267496 (1981-05-01), Ivanov et al.
patent: 4337424 (1982-06-01), Cap et al.
Cap Hinrich
M/u/ ller Rolf
von der Heide Johann
Kasper Horst M.
Papast-Motoren GmbH & Co. KG
Ro Bentsu
Truhe J. V.
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