H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 37/02 (2006.01) H05B 39/04 (2006.01)
Patent
CA 2282114
The present invention relates to a method for providing an output signal (U a) having a desired value of a characteristic quantity (U arms) at the output of a switched-mode power supply unit, where at least one low-voltage lamp is connected to the output of the switched-mode power supply unit, a load current (I L) corresponds to the sum of the currents (I1, I2) flowing through all the low-voltage lamps, on the input side the switched-mode power supply unit is driven by an input signal (U el, U e2) having at least one variable characteristic quantity (PW), and the switched-mode power supply unit is connected to an operating voltage (U B), having the following steps: firstly, in a calibration operation, the dependence of the characteristic quantity (U arms) of the output signal (U a) on the operating voltage (U B), the load current (I L) and at least one variable characteristic quantity (PW) of the input signal (U e1, U e2) is determined and this dependence is stored in a memory. During operation, characteristic quantities of the load current (I L) and of the operating voltage (U B) are determined and from the memory is read a value or values of the at least one variable characteristic quantity (PW) of the input signal (U e1, U e2) in dependence on the previously determined values of load current (I L) and operating voltage (U B), which correspond to the desired value of the characteristic quantity of the output signal. The at least one variable characteristic quantity (PW) of the input signal (U e1. U e2) is subsequently varied to the value(s) read from the memory.
Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh
Smart & Biggar
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