Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1986-06-06
1988-06-07
Salce, Patrick R.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
363 68, 323271, 361 56, 361 91, H02M 704
Patent
active
047501006
ABSTRACT:
A transfection high-voltage controller for directing high-voltage currents to a suspension of cells and DNA comprising a control section, a power store, and a high-joule switch. Under control of the control section, the high-joule switch directs a high-voltage current from the power store to a load such as a cuvette. The high-joule switch comprises a semiconductor controlled rectifier (SCR) having a gate coupled to the control unit for triggering the device, an anode for receiving the high-voltage current from the power store, and a cathode for delivering the high-voltage current to the cuvette. A current sink may be connected to the anode of the SCR to render it non-conductive a predetermined time after the high-voltage current appears at the cathode. Multiple SCRs may be connected in series to support voltages over 3,000 and currents in excess of 125 amperes, and a trigger control unit may be attached to the gate of each SCR in the series to effect simultaneous or serial triggering of the group.
REFERENCES:
patent: 3609413 (1971-09-01), Lane
patent: 3772532 (1973-11-01), Petrov et al.
patent: 3898410 (1975-08-01), Peters, Jr.
patent: 4489372 (1984-12-01), Hatano et al.
patent: 4571535 (1986-02-01), Gyugyi
"SCR Manual Including Triacs and Other Thyristors", Fifth Edition, 1972, General Electric Company, pp. 159-164.
"Solid State Device Manual, " 1975, RCA Corporation, pp. 16-18.
Ault Anita M.
Bio-Rad Laboratories
Salce Patrick R.
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