| 摘要 |
The invention relates to the method for controlling high intensity discharge lamp comprising supplying a signal of variable frequency and constant filling factor from the switches cascade to the ballast circuit and the lamp, said ballast circuit having included at least one condenser and at least one inductance, hi the method it is used the signal of periodically fluctuating frequency and constant filling factor 50 to 50%, supplied from the electronic switches cascade of the half-bridge type, connected with the ballast circuit and the lamp 9, where the ballast circuit includes at least first condenser (C1), the lamp and includes first inductance (L1) and second condenser (C2) forming a resonant circuit. The invention also related to the supply system for high intensity discharge lamp comprising the stabilized voltage source, which supplies the electronic switches cascade, half or full bridge type, connected with the lamp and the ballast, which ballast includes at least one condenser and at least one inductance, and includes the generator of the signal of voltage or current regulated frequency and the generator control unit for generating modulated width impulses. The system is characterised in that it includes the signal generator (CONTROL1) of voltage or current regulated frequency and constant filling factor and the control unit (CONTROL2) comprising at least one signal generator of constant frequency and variable filling factor. The control unit (CONTROL2) output is connected with the control input of the signal generator (CONTROL1) in such way that the control system (CONTROL2) is adapted to deliver to the signal generator (CONTROL1) impulses of modulated width, which change the signal generator (CONTROL1) operating frequency, and where the signal generator (CONTROL1) is connected with the electronic switches (T1, T2) cascade of half- bridge type, and the ballast includes first condenser (C1), first inductance (L1), second condenser (C2), and it includes second inductance (L2) separating the lamp (LAMP) from second condenser (C2). |
