Electric power conversion systems – Current conversion – With voltage multiplication means
Patent
1989-08-15
1991-02-12
Wong, Peter S.
Electric power conversion systems
Current conversion
With voltage multiplication means
307110, 355288, 315241P, G03G 1520, H02M 719
Patent
active
049929232
ABSTRACT:
Disclosed is an electrical power supply for use, for example, for a flash fusing device in an electrophotographic recording apparatus, in which a DC high voltage is generated from a low voltage of an AC power supply so that the high voltage DC energy is momentarily consumed or discharged. The electrical power supply is configured in a manner so that, in order to make unnecessary a charging capacitor and a current limiting resistor for preventing rectifier elements from being damaged, at least some of the rectifier elements are constituted by rectifying control elements such as thyristors or transistors and a control signal is given to those rectifying control elements so as to make the rectifying control elements be in an isolated state. By use of such a configuration, the electrical power supply can be reduced in size as well as in power loss. The effect can be fully exhibited not only in a fusing apparatus employing the electrical power supply but in a recording apparatus employing such a fusing apparatus.
REFERENCES:
patent: 3290580 (1966-12-01), Wolff
patent: 3824447 (1974-07-01), Kuwabara
patent: 3900786 (1975-08-01), Jordan
patent: 4016476 (1977-04-01), Morokawa et al.
patent: 4068295 (1978-01-01), Portmann
patent: 4460952 (1984-07-01), Risinger
L. M. Ernst et al., "Flash Fuser Power Supplies", IBM Technical Disclosure Bulletin, vol. 23, No. 2, Jul. 1980, pp. 513-515.
"High Voltage Engineering", Institute of Electrical Engineers of Japan, pp. 90-91.
Fumiwara Shigetaka
Hori Yasuro
Kumasaka Takao
Mitsuya Teruaki
Nishino Shin-ichi
Hitachi , Ltd.
Hitachi Koki Co,. Ltd.
Wong Peter S.
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