Circuit arrangement for optimal current generation in processes

Details Circuit arrangement for optimal current generation in processes Circuit arrangement for optimal current generation in processes

1992-04-01

1993-01-19

Griffin, Donald A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Capacitor protection

204228, H01G 110, C25D 1700

Patent

active

051811545

ABSTRACT:
A circuit arrangement for current supply in processes of electrochemically initiated plasma-chemical layer production. It is preferably applied in the plasma-chemical conversion of electrochemically pre-formed layers, e.g. on light metals. The output of the adjustable three-phase transformer with subsequently connected 6-pulse rectifier circuit is branched twice, wherein a first bridge circuit comprises a capacitor connected in parallel to a voltage sensor. A second bridge circuit contains a freewheeling diode parallel to the current limiting choke and the bath for process implementation. A pulse analyzer is arranged parallel to the latter, and the two bridge circuits are separated by a switch element. An optoelectronic sensor which is connected with the control unit, as is the pulse analyzer, the voltage sensor and a current sensor, is introduced for indicating the pulsed plasma discharges controlled by the circuit arrangement, wherein the control unit influences the switch element with the three-phase transformer in a directed manner to optimally adjust the pulse frequency and duty factor.

REFERENCES:
patent: 3781911 (1973-12-01), Davidson
patent: 4849849 (1989-07-01), Zucker et al.
patent: 5007993 (1991-04-01), Hull et al.

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