| 摘要 |
1. Power supply installation comprising a converter which can be fed from an electric supply system and which exhibits a static inverter (1; 30a, 30b, 30c), for loads which also include motors (14) - in particular for lamps (13), motors (14) and a battery charger in a rail vehicle, the converter, given variations in the input voltage, delivering an almost constant output voltage and the inverter (1; 30a, 30b, 30c) featuring at least one inverter/transformer (2), which has at least one leakage gap and whose secondary circuit is equipped with a voltage stabilizer featuring compensation, resonance and output windings (6, 4, 5), a resonance capacitor (7) and harmonics compensation winding (3), and the input side of the inverter (1; 30a, 30b, 30c) being arranged so that it can be connected to the onboard battery, characterized in that a DC to DC converter (28) delivering an output voltage lower than that of the input power supply is arranged between the onboard battery (18) and the input side of the inverter (1; 30a, 30b, 30c), whereby the output voltage of the inverter (1; 30a, 30b, 30c) on input power failure is lower than its rated voltage, in that an input resistance (11) and an input resistance by-pass contact connected in parallel thereto are arranged on the power input side of the inverter (1; 30a, 30b, 30c), the input resistance by-pass contact (12) being the make contact of a relay which is connected to the output side of a comparator (16), in that the input comparator (16) is connected to the output of the inverter (1; 30a, 30b, 30c) and emits a signal when the output voltage of the inverter (1; 30a, 30b, 30c) reaches the rated value of the output voltage, whereby the make contact of the relay is closed, and in that a threshold voltage measuring element (29) is provided, which is connected on the input side to the electricity supply and to the input resistance (11) and from whose output side a contacter arranged in the supply circuit of the motors can be activated to operate the motors (14) when both the power is applied and the input resistance short-circuited. |
