Electric power conversion systems – Current conversion – Including automatic or integral protection means
Patent
1986-02-24
1988-03-15
Salce, Patrick R.
Electric power conversion systems
Current conversion
Including automatic or integral protection means
363 19, 363131, H02H 7122
Patent
active
047317213
ABSTRACT:
A regulated high-voltage power supply comprising a tuned-collector type oscillation circuit (3) having an oscillation transistor (TR4), a control circuit (2) for controlling the base current of the oscillation transistor (TR4), a resistance circuit (4) for supplying the base current to the oscillation transistor (TR4) in response to the output from the control circuit (2) and a protection circuit (5) having a protective transistor (TR3) for partially receiving the output from the resistance circuit (4) to attenuate the output from the control circuit (2) when short-circuiting is caused in the area of a load (RL). The protective transistor (TR3) is made conductive upon short-circuiting in the area of the load (RL). In order to delay the oscillation starting time of the oscillation circuit (3) immediately after releasing of the short-circuiting, provided is a time-constant circuit (51) formed by a delay capacitor (C51) and discharge resistors (R51, R52) for discharging the storage charge of the delay capacitor.
REFERENCES:
patent: 3879647 (1975-04-01), Hamilton et al.
Igashira Kiyoteru
Maeba Yukio
Murata Manufacturing Co. Ltd.
Salce Patrick R.
Sterrett Jeffrey
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