Electric power conversion systems – Current conversion – Including automatic or integral protection means
Patent
1987-12-16
1989-02-14
Wong, Peter S.
Electric power conversion systems
Current conversion
Including automatic or integral protection means
363133, 378101, H02H 7122
Patent
active
048050806
ABSTRACT:
The invention relates to a power supply circuit for an X-ray tube for converting direct current to high-frequency pulses and including at least two transistors (8, 9) whose collector-emitter circuits are controlled by means of a pulse-width modulator (5) through base control transformers (12) in a manner that transistors (8, 9) operate in push-pull fashion, one terminal (+) of a direct-current source being connected to the collector-emitter circuit of transistors (8, 9). The collector-emitter circuit of each transistor (8, 9) is separately connected through its own transformer (23, 23a) to said one terminal (+) of a direct-current source in a manner that the primary windings (24, 24a) of transformers (23, 23a) serve as ballasts limiting the current passing through transistors (8, 9) and the secondary windings (25, 25a) is connected in series with diodes (26) between the terminals terminals (+ and -) of a direct-current source.
REFERENCES:
patent: 3925715 (1975-12-01), Venable
patent: 3938024 (1976-02-01), Clarke
patent: 4190883 (1980-02-01), Cowett, Jr.
patent: 4371918 (1983-02-01), Schierjott
patent: 4654770 (1987-03-01), Santurtun et al.
patent: 4698742 (1987-10-01), Jones et al.
Radiante Oy
Wong Peter S.
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