Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1995-11-14
1998-02-03
Wong, Peter S.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 41, 363 97, H02M 3335
Patent
active
057151490
ABSTRACT:
A high-voltage power pack includes: a switching circuit for effecting switching control of a low-voltage d.c. signal to generate a low-voltage a.c. signal; a high-voltage transformer for increasing the voltage of the low-voltage a.c. signal outputted from the switching circuit to generate a high-voltage a.c. signal; a combination of a rectifying circuit and a low-pass filter for rectifying and smoothing the high-voltage a.c. signal to generate a high-voltage d.c. signal; resistors dividing the high-voltage d.c. signal obtained from and smoothed through the rectifying circuit and low-pass filter; a feedback circuit for controlling the switching circuit so that the potential at a divided point between the resistors may be kept constant; and an a.c. power source for applying an alternating current to the divided point, the alternating current having a frequency component transmissible through the low-pass filter, whereby an a.c. superimposed voltage made of the high-voltage d.c. signal with an a.c. voltage superimposed is obtained from the output side of the low-pass filter.
REFERENCES:
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patent: 4747012 (1988-05-01), Maeba et al.
patent: 4841425 (1989-06-01), Maeba et al.
patent: 5285368 (1994-02-01), Ishikawa
patent: 5508904 (1996-04-01), Hara
Aiba Masahiko
Arikawa Sumitaka
Han Y. J.
Sharp Kabushiki Kaisha
Wong Peter S.
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