Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1992-02-20
1993-12-07
Pellinen, A. D.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
323272, 363 71, G05F 100
Patent
active
052685934
ABSTRACT:
A parallel type switching power source circuit wherein reliable energization is achieved by individual power source switches provided for power source units, without common start-up switch, is provided. The start-up signal input terminals I.sub.1 and I.sub.2 and the drive stop signal input terminals R.sub.1 and R.sub.2 of power source units 12, 22 become active when they are connected to the negative side of an input power source 31. The power source unit 12 (or 22) starts only if the start-up signal input terminal I.sub.1 (or I.sub.2), is active and the drive stop signal input terminal R.sub.1 (or R.sub.2) is non-active. When the power source switch 16 is turned on at first, I.sub.1 becomes active, while R.sub.1 retains in active. Then the start-up condition is not satisfied and both of the first and second switching power sources 15 and 25 do not start. When the power source switch 26 is turned on next, I.sub.2 becomes active and both of R.sub.1 and R.sub.2 become non-active. This causes a start-up condition to be arranged, and then the switching power sources 15 and 25 start simultaneously.
REFERENCES:
patent: 4766364 (1988-08-01), Biamonte et al.
patent: 4877972 (1989-10-01), Sobhani et al.
patent: 5122726 (1992-06-01), Elliott et al.
Japanese Published Unexamined Utility Model Appl. 3-3018, Jan. 14, 1991 (no English translation), FIGS. 1-3.
Elms Richard T.
NEC Corporation
Pellinen A. D.
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