DEVICE FOR ADJUSTING OUTPUT CURRENT OF IMPULSE STABILIZING TRANSFORMER Russian patent published in 2008 - IPC H02M7/00 

FIELD: power electronics, possible use in powerful supplies of stabilized current.

SUBSTANCE: the device contains two-cycle impulse transformer with two high frequency controllable switches (1,2), an input LC-filter (3) and output transformer (9), connected to secondary winding (8) of which are: rectifier (7); network rectifier (10), connected through switch (11) to input of LC-filter (3); output LC-filter (4), is connected by input to output of rectifier (7) and by output to load circuit (5); control unit (15) is connected by output to contacts of primary windings of dividing transformers (17,18), contacts of secondary windings of which are connected to control circuits of switch (1,2); adding amplifier (16) is connected by first input through current sensor (6) to output of LC-filter (4) and by output to input of control unit (15); pulse-width modulation comparator (12) is connected by output to control input of switch (11) and by first input through generator of linearly changing voltage (13) is connected to output of clock impulse generator (14); integration adder (21) is connected by first input to current setting supporting voltage supply (19), by second input to output of current sensor (6) and by output to second input of adding amplifier (16); and amplifier with piecewise-linear transfer characteristic (20) is connected by input to output of adding amplifier (16) and by output to second input of the pulse width modulation comparator.

EFFECT: increased reliability of operation of impulse transformer and precision of regulation of its output current for any value of current setting signal.

2 dwg