Shunt-foldback voltage source

Details Shunt-foldback voltage source Shunt-foldback voltage source

1984-03-01

1985-05-28

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Arc suppression at switching point

361 10, 361 55, 361 58, 361111, 307135, H02H 722

Patent

active

045204160

ABSTRACT:
A foldback power supply (12) is used in an automatic testing device for application of power to a device under test (17). Connection to the device under test is made by means of relay contacts (32, 34, 36, and 38). Arcing and unacceptable transients are avoided by means of a current sink (40) in parallel with the power supply (20). The current sink is operated to draw more than the rated current of the power supply so that the power-supply voltage drops to an acceptable level and the stored energy is simultaneously dissipated. The relay contacts (32, 34, 36, and 38) can then be opened or closed without unacceptably large transients and without the time delays that might otherwise be encountered in waiting for energy dissipation of the energy in the energy-storage elements of the power supply (12) and the device under test (17).

REFERENCES:
patent: 3359434 (1967-12-01), Galluzzi
patent: 3512044 (1970-05-01), Jones
patent: 3660721 (1972-05-01), Baird
patent: 3872355 (1975-03-01), Klein et al.
patent: 3953766 (1976-04-01), Howell et al.
patent: 4031431 (1977-06-01), Gross
patent: 4163269 (1979-07-01), Helwig et al.
patent: 4280162 (1981-06-01), Tanka et al.
patent: 4351012 (1982-09-01), Elms et al.
patent: 4351013 (1982-09-01), Matsko et al.
patent: 4353103 (1982-10-01), Whitlow

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