TEST CURRENT SOURCE Russian patent published in 2015 - IPC H02H3/16 

FIELD: electricity.

SUBSTANCE: test current source contains the power unit, the bridge converter implemented on semiconductor switches with free-wheeling diodes, the active-inductive load, the capacitor filter, the diode, the voltage limitation unit, the control system containing the clock generator, regulator with control inputs. T- and D-triggers with direct and inverse outputs. The bridge converter is connected to output circuits of the power unit and to the active-inductive load by the respective circuits, the capacitor filter is connected to power-supply circuits of the bridge converter, and the diode - into one of output circuits of the power unit; the voltage limitation unit is implemented on the basis of the semiconductor switch with series connected discharge resistor and the threshold element in the control circuit of the semiconductor switch, and the input of the threshold element is connected parallel to the added diode, and the semiconductor switch with the discharge resistor is connected parallel to the capacitor filter, the regulator contains the synchronization input connected to output of T-trigger, inputs of D-trigger are connected respectively to direct output of T-trigger and to output of the regulator, and outputs of T- and D-triggers are connected to the control circuits of semiconductor switches of the bridge converter.

EFFECT: simplification of the inverter control system and improvement of efficiency and reliability of operation and when it is used as a part of 100 percentage protection against single-phase ground faults in the stator winding of the generator.

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