Electric power conversion systems – Current conversion – Including automatic or integral protection means
Patent
1997-06-26
1999-07-20
Nappi, Robert E.
Electric power conversion systems
Current conversion
Including automatic or integral protection means
363 39, 361 90, H02M 3315
Patent
active
059263849
ABSTRACT:
An electronic circuit includes a dynamic regulator connected to a load and a dc-to-dc converter to reduce a need for bulky and expensive capacitors which would otherwise be required to suppress transients. The dynamic regulator comprises one or both of a current source circuit for actively sourcing current to the load during load current demand transients, and a current sink circuit for actively sinking current from the load during load current excess transients. The dynamic regulator preferably senses the load voltage, and tracks the load voltage. The current source circuit preferably includes a current source switch, and a current source controller for operating the current source switch responsive to the load voltage falling rapidly with respect to the tracked load voltage. In a similar fashion, the current sinking circuit may include a current sink switch, and a current sink controller for operating the current source switch responsive to the load voltage rising quickly above the tracked load voltage. In one embodiment, the load voltage tracking may be provided by a resistor-capacitor (R/C) network connected across the load. The R/C network may operate at a fast time constant for following load ripple, but at a slower time constant when sourcing or sinking current. The dynamic regulator is preferably a monolithic integrated circuit and may be either separate from or incorporated into the dc-to-dc converter.
REFERENCES:
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patent: 5502370 (1996-03-01), Hall et al.
patent: 5528167 (1996-06-01), Samela et al.
patent: 5539910 (1996-07-01), Brueckmann et al.
Harris Matthew
Hawkes Charles Edward
Jochum Thomas Andrew
Walters Michael Mark
Harris Corporation
Jardieu Derek J.
Nappi Robert E.
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