| 摘要 |
<p>PURPOSE:To provide a power supply controller for an airport illumination lamp in which a constant voltage to be extracted from an illumination lamp power supply circuit is stabilized and illuminance of the lamp is variable. CONSTITUTION:A conduction wire (c) connected with a switch circuit 3 for short-circuiting an illumination transformer is provided in a power supply circuit having a constant-current power source l, illumination transformers T1, 1-TLn for supplying powers to illumination lamps L1-Ln and saturated transformation circuits ST1-STk for supplying a constant-voltage to electric loads RL1-RLk. A conducting angle is so controlled that an output current of the power source l becomes a constant value in a conducting angle controller 2', and a conducting angle for turning ON the circuit 3 is variably controlled to always supply a predetermined current to the circuits ST1-STk, and voltage supply amounts of the transformers are variable in response to an ON period of the circuit 3.</p> |
