Electric power conversion systems – Current conversion – Including automatic or integral protection means
Patent
1992-03-06
1994-03-01
Voeltz, Emanuel T.
Electric power conversion systems
Current conversion
Including automatic or integral protection means
363 21, 363 57, 323281, 323907, 361 18, 361103, H02H 7122
Patent
active
052913872
ABSTRACT:
A switching-type voltage regulator of this invention comprises a voltage control section for generating a stabilized voltage by controlling a voltage supply period from input side to output side, and a protective device. The protective device monitors the temperature of a certain component part or parts of the voltage control section and convert the temperature into a voltage to compare with the reference voltage generated by a reference voltage source, and brings the output of the voltage control section to a halt in accordance with the result of comparison. The output of the voltage control section is brought to a halt regardless of the presence of output abnormalcy when the temperature of the component part or parts monitored exceeds a certain level. As the monitoring means, it is preferable to utilize the electrical characteristic of semiconductor p-n junction changing with temperature, and a semiconductor diode is more preferable. A preferable halting means is a 2-input AND circuit where a signal representing the result of the comparing means are inputted into one of the input terminals, and a switching control signal to the other to control a switching element. Preferably, a latching means is installed between the comparing means and halting means to maintain a halted condition.
REFERENCES:
patent: 4727450 (1988-02-01), Fachinetti et al.
patent: 5008771 (1991-04-01), Palara
patent: 5021620 (1991-06-01), Inumada
patent: 5073838 (1991-12-01), Ames
patent: 5115388 (1992-05-01), Shigekane
NEC Corporation
Voeltz Emanuel T.
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