| 摘要 |
The invention concerns an energy saving electrical system with good energy economy for the ignition, operation and extinguishing of gas-discharge lamps, such as up to four low-pressure fluorescent lamps or the equivalent, high-pressure mercury lamps and both high-pressure and low-pressure lamps of sodium type or metal halogen lamps in alternating current networks. The system comprises a rectifier (1), a capacitor (2), a power transistor (50) and a first transformer and a second transformer (T1, T2), each with several windings. The system furthermore comprises means (46) for stabilising the emission of light during changes of voltage in the supply network, and means (59, 39, 3, 46, 19, 35, 52) for limiting the current through and the voltage across the power transistor (50). Lamps that are to be used are connected to outputs of the windings (98 107), which windings are designed and connected such that they cooperate in order to operate the relevant lamp or lamps with negative and positive currents that are equal in magnitude. |
