STABILIZED TRANSFORMER OF CONSTANT VOLTAGE Russian patent published in 2008 - IPC H02M3/335 

FIELD: electric engineering.

SUBSTANCE: stabilized transformer of constant voltage (dwg. 1) contains supply (1) of constant voltage, between first and second outputs of which a parametric voltage stabilizer (2) is coupled, output of which is connected to first power output of Schmitt trigger (3), second power output of which is connected to second output of constant voltage supply (1), input of Schmitt trigger (3) is connected to first output of first resistor (4) and to anode of stabilitron (5), and inverse output of Schmitt trigger (3) is connected to first contacts of second resistor (6) and third resistor (7), second contact of which is connected to second contact of first resistor (4) and through first capacitor (8) is connected to second contact of constant voltage supply (1), key (9), control input of which is connected to inverse output of Schmitt trigger (3), first contact of the key is connected to second contact of constant voltage supply (1), second contact of the key is connected to first contact of constant voltage supply (1) through primary winding of impulse transformer (10) which contains n first secondary windings (11.1), (11,2) (where n=2), each of which through serially connected corresponding rectifier (12.1), (12.2) and filter (13.1), (13.2) is connected to corresponding load (14.1), (14.2), and through secondary winding (15), first contact of which directly connects to second contact of constant voltage supply (1), second contact is connected to anode of first diode (16), cathode of which is connected to first contact of fourth resistor (17) and through second capacitor (18) is connected to second contact of constant voltage supply (1), second diode (19), which additionally features third diode (20), anode of which is connected to second contact of fourth resistor (17), and cathode is connected to cathode of stabilitron (5), and fifth resistor (21), contacts of which are connected to cathode of first diode (16) and second contact of constant voltage supply (1) respectively, cathode of second diode (19) is connected to second contact of second resistor (6), and anode is connected to point of connection of first resistor (4), capacitor (8) and third resistor (7).

EFFECT: increased stability when changing temperature of environment and input voltage.

2 dwg