| 摘要 |
The present invention relates to the determination of a temperature of a brake resistor (3), in particular a brake resistor (3) for dissipating kinetic energy of a railroad traction vehicle into heat. During operation of the brake resistor (3), a resistor current carried by the brake resistor (3) is repeatedly switched on and off, so that a plurality of consecutive current pulses are generated, wherein the commencement of each of the pulses is defined by a respective point in time (ta) when the resistor current is switched on. An electric voltage UD across the brake resistor (3) is measured during at least one of the current pulses by performing a voltage measurement. The resistor current iRB is measured during the at least one of the current pulses by performing a current measurement. The current measurement is performed not earlier than the end of a first time interval (k) of defined length after commencement of the pulse. The temperature of the brake resistor (3), or an equivalent quantity, is determined using the electric voltage UD, the resistor current iRB and a temperature coefficient - or equivalent information - of the brake resistor (3). <IMAGE> |
