| 摘要 |
Constant current regulator (10) for supplying and controlling an AC series circuit (9) current of an airfield lighting system, comprising an input port (11) arranged for being coupled to an AC power supply, an output port (12) arranged for outputting the series circuit current at an output voltage, an interface port (13) arranged for receiving a command signal representative of a set value of the series circuit current, and a transformer (15) coupled between the input port and the output port, for providing galvanic insulation between the input and output ports. A control unit (171, 172) is arranged for determining a root mean square voltage level value required to generate the set value of the series circuit current, and for determining an output voltage signal comprising a fundamental component of sinusoidal shape and of a fundamental frequency, and a third harmonic component of the fundamental component having a frequency three times the fundamental frequency, wherein the third harmonic component has a peak value of at least 1% of a peak value of the fundamental component, wherein the output voltage signal has a root mean square value equal to the root mean square voltage level value. Electric circuitry (14, 16) is arranged for generating the output voltage signal and for applying it to the output port as the output voltage. |
