ELECTRONIC START-UP REGULATING APPARATUS FOR GAS-DISCHARGE LAMP Russian patent published in 2011 - IPC H05B41/16 

FIELD: physics.

SUBSTANCE: in an electronic start-up regulating apparatus for a gas-discharge lamp (1), connected to output leads of the apparatus on a serial resonant circuit, comprising a monophase bridge rectifier on four diodes (2-5), output leads of which are connected to input leads of the apparatus through a resistor (6), a clamp which shunts output leads of the rectifier and comprising a serial circuit consisting of a capacitor (7), a diode (8), a themistor (9) and a second capacitor (10) as well as a second (11) and a third (12) diode, common connection points of the capacitors of the serial circuit of the clamp with the diode and the thermistor are connected to corresponding output leads of the rectifier through anti-parallel connected second and third diodes, respectively, a monophase half-bridge inverter on transistors (13, 14) with anti-parallel diodes (15, 16), input leads of which are connected to output leads of the rectifier, also comprising two series-connected filter capacitors (17, 18), a three-winding transformer, a protective capacitor (19), as well as a commutating capacitor (20) an a commutating inductor (21), which form with the gas-discharge lamp a serial resonant circuit connected through the primary winding (22) of the transformer and the protective capacitor to output leads of the inverter, formed by common connection points of the filter capacitors and transistors, respectively, the base of the transistor is connected to the emitter through the second serial circuit from an anti-parallel connected fourth diode (23) and a resistor (24), as well as through a third serial circuit from the secondary winding (25) of the transformer, connected anti-parallel to the primary winding, a separating capacitor (26) and a second resistor (27), the transistor is shunted by damping capacitor (28) and a third resistor (29), the collector of the second transistor is connected to the base through a fourth resistor (30), the base of the second transistor is connected to the emitter through a fourth serial circuit from an anti-parallel connected fifth diode (31) and a fifth resistor (32), as well as through a fifth serial circuit from the second secondary winding (33) of the transformer, connected in accordance with the primary winding, a second separating capacitor (34) and a sixth resistor (35), a sixth serial circuit from a third capacitor (36), a seventh resistor (37), a sixth diode (38), a threshold element (39), an eighth resistor (40) and a fourth capacitor (41), shunted by a ninth resistor (42), which connects the common connection point of the commutating capacitor and the commutating inductor with the emitter of the second transistor, common connection points of the seventh resistor and the sixth diode, the sixth diode and the threshold element of the sixth serial circuit are connected to the emitter of the second transistor through a posistor (43) and, respectively, through a tenth resistor (44) with parallel-connected fifth capacitor (45), thyristor (46), whose anode is connected to the base of the transistor through a seventh diode (47), and to the collector of the transistor through an eleventh resistor (48), the cathode is connected to the emitter or the second transistor, and the control electrode is connected to the common connection point of the eight resistor and the fourth capacitor.

EFFECT: high reliability of the electronic start-up regulating apparatus for a gas-discharge lamp.

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