BALLAST ELETTRONICO TELECOMANDATO A RISPARMIO ENERGETICO PER ALIMENTAZIONE DI LAMPADA DI SCARICA A GAS AD ALTA PRESSIONE.

摘要

The present invention belongs to the class of electronic ballasts for ignition, stability and regulation of regimes for high pressure gas discharge lamps which supply to the lamp the current with the frequency different from the one of the first source of power supply. The device is commanded remotely by means of power line signalling. The invention permits to realize two regimes of the lamp power supply: a) with high frequency alternate current (units - tens of kHz); b) with continuous current with cyclic commutation of polarity. In both cases a continuous or step dimming is provided, through the device working regime variation. One of original characteristics of the proposed invention is a possibility of an essential reduction of component number and reliability increase by means of exclusion of the power factor corrector and some other modules through their substitution with an original circuit of filtering and power factor correction with the phase number multiplication and the use of 3-phase rectifier bridge. The present invention permits not only the control (local or remote) of illumination regimes of the lamp but also provides diagnostic function working in dialog regime with an external control unit, by means of modulated signals transmitted in the power-line network.