Circuit configuration for limiting the cutoff voltage on a servo

Details Circuit configuration for limiting the cutoff voltage on a servo Circuit configuration for limiting the cutoff voltage on a servo

1993-05-05

1994-07-05

Ro, Bentsu

Electricity: motive power systems

Positional servo systems

With protective or reliability increasing features

318459, 318500, 318519, 318368, H02P 308

Patent

active

053270568

ABSTRACT:
A circuit configuration for limiting the cutoff voltage occurring in controlling a servomotor (M) by means of width-modulated DC pulses comprises a power transistor (T2) which, via a capacitor (C) is connected through for a short time when a cutoff voltage appears thus limiting the cutoff voltage. Subsequently the transistor (T2) presents a high impedance. As a result a short-circuiting of the servomotor (M) will be prevented in the phase in which a spring force resets the servomotor into its zero position.

REFERENCES:
patent: 3619752 (1971-11-01), Bateika
patent: 4325011 (1982-04-01), Peterson
patent: 4658203 (1987-04-01), Freymuth
patent: 4935678 (1990-06-01), Houst

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