| 摘要 |
<p>The present invention relates to a static source for supplying auxiliary services on the passenger waggons and railway restaurants, which are supplied from the main train conduit of 1.500 VAC-50 Hz. The power source supplies the heating aggregate under the waggon, with the alternating mono-phase voltage of 1.500 VAC-50 Hz, by means of a separator (1) that may break the load current, a contactor (4) and a thermal fuse (3). From the separator (1), by means of another contactor (6) and a thermal fuse (5), a monophase power transformer (7) is supplied. The monophase transformer (7), which is supplied from the train bus with the voltage of 1.500 VAC - 50 Hz, at the output has three voltages: the first voltage, of 230 VAC, passes through a voltage limiter (9) and supplies the consumers of 230 VAC - 50 Hz, the second voltage at the output of the second secondary winding of the transformer (7), enters into a high-vacuum rectifier valve (11) and then, by means of a high-frequency monophased inverter (17), and of a diode rectifier bridge (21) gives, at the output, the rated voltage of 24 VDC for the auxiliary service consumers and charges the storage battery at limited current and voltage, depending on the battery temperature. The third output voltage on the transformer is taken from the third secondary winding of the monophase transformer and is applied by means of a rectifying bridge (30) to a three-phase inverter (35) which gives at the output, the voltage of 3x400 VAC-2...50Hz by which there is driven the compressor motor of the air conditioning equipment, the motor start up being performed by a low frecquency of about 2 Hz that increases up to 50 Hz, the ratio supply voltage/frequency ratio being maintained constant.</p> |
