CATHODE UNIT OF WELDING ELECTRONIC-OPTICAL SYSTEM WITH CATHODE OF INDIRECT HEATING WITH ELECTRON BOMBARDMENT Russian patent published in 2008 - IPC B23K15/02 

FIELD: technological processes; electricity.

SUBSTANCE: first outlet of the first rectifier is connected with the first outputs of the first condenser and the first resistor, the second outputs of which are connected with the second output of the first rectifier and with the first output of heating winding. The second output of heating winding is connected to the second output of auxiliary cathode. The first output of the second rectifier is connected to the first inlet of voltage divider, to the first outputs of voltage reference diode and second condenser, the second output of which is connected to the second output of voltage reference diode, to the first outputs of the third condenser and second resistor, the second output of which is connected to the second input of voltage divider and second output of the second rectifier. The third resistor is connected parallel to the control element. Resistor of control element is connected between emitter and base of the first transistor, emitter of which is connected to the first output of diode bridge, the first input of which is connected to the power supply source, and the second input - to the second output of the primary winding. The second output of diode bridge via alternating resistor is connected to the first output of the third condenser, emitter of the first transistor and emitter of the second transistor, the second output of the second condenser and the first output of the fourth resistor, the second output of which is connected with the base of the second transistor, the second output of the third condenser and output of voltage divider.

EFFECT: stabilisation of electron bombardment capacity.

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