Over-voltage interrupt for a phase controlled regulator

Details Over-voltage interrupt for a phase controlled regulator Over-voltage interrupt for a phase controlled regulator

1976-12-29

1977-08-23

Shoop, William M.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 87, H02M 118

Patent

active

040442950

ABSTRACT:
An over-voltage interrupt circuit is provided which senses the local output of the phase controlled regulator. A reference is generated which is utilized in a comparator as the over-voltage threshold. When the sensed regulator output is above this threshold setting an override signal is produced which overrides the condition of the on/off control. The comparator is arranged to have a lower reset threshold value than the setting threshold so that the on/off control is again switched in response to the sensed voltage dropping below the reset threshold level. If the over-voltage condition persists, the comparator continues to set and reset and, accordingly, the on/off control is continually switched off and on giving a limited average voltage output from the regulator. The on/off control operates through a walk-in circuit which controls the voltge during turn on and off to prevent over and undershoot voltage problems. The active capacitor is also turned off by an over-voltage condition recognized by the comparator and remains off as long as the over-voltage condition persists.

REFERENCES:
patent: 3611086 (1975-10-01), Mokrytzki et al.
patent: 3719873 (1973-03-01), Graf
patent: 3733540 (1973-05-01), Hawkins
patent: 3800198 (1974-03-01), Graf et al.
patent: 3840798 (1974-10-01), Burchall et al.
patent: 3848175 (1974-11-01), Demarest
patent: 3986047 (1976-10-01), Griess

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