Electric power conversion systems – Current conversion – Having plural converters for single conversion
Patent
1995-10-17
1997-06-10
Wong, Peter S.
Electric power conversion systems
Current conversion
Having plural converters for single conversion
307 82, H02M 7155
Patent
active
056382642
ABSTRACT:
A parallelized power supply system including a plurality of switching power supplies each having a circuit for limiting rush current generated when a main switch is turned on. This system can be installed in an apparatus which requires the functions such as power uninterrupted operation and live wire insertion/dismount. Each switching power supply has another power supply for driving the rush current limiter circuit and a relay circuit for supplying relay driving current and making a connection of relay contacts after a predetermined time lapse after the operation start of the switching power supply. An a.c. power is supplied via the relay contacts to each switching power supply. The relay driving time set in the rush current limiter circuit is different for each switching power supply. Accordingly, concentration and excess of rush current when the relay is driven can be suppressed, and sparks at contact pins of a connector to be otherwise generated when the switching power supply is mounted on the connector, can be eliminated so that radiation noises and connector breakage can be avoided. Each of the switching power supplies connected in parallel has a current detecting resistor connected between the low voltage side of a load and the low voltage side of a voltage regulator d.c. output, and at least one operational amplifier for detecting a change in the d.c. output, the negative power supply terminal of the operational amplifier being connected to the current detecting resistor at its one end on the load side.
REFERENCES:
patent: 3665502 (1972-05-01), Means
patent: 3739186 (1973-06-01), Gokey et al.
patent: 4628431 (1986-12-01), Kayser
patent: 5157269 (1992-10-01), Jordan et al.
patent: 5418707 (1995-05-01), Shimer et al.
R. Wu, et al. "Load-Current-Shar.ing Control for Parallel Operation of DC-to-DC Converters", IEEE, PESC-1993, pp. 101-107.
D. Azzis, et al., "Parallel Identical Direct-Mode DC-DC Converters", IBM Technical Disclosure Bulletin, vol. 25, No. 2, Jul. 1982, pp. 624-625.
LinCMOS .mu.Power Precision Quad Operational Emplifier TLC1079, Texas Instruments, 1992, pp. 2-779-2-794.
Abe Yasuo
Hayashi Katsunori
Horie Hideaki
Kanouda Akihiko
Onda Kenichi
Berhane Adolf
Hitachi , Ltd.
Wong Peter S.
LandOfFree
Parallelized power supply system providing uninterrupted operati does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Parallelized power supply system providing uninterrupted operati, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Parallelized power supply system providing uninterrupted operati will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-769947