| 摘要 |
PURPOSE:To eliminate radio wave trouble and prevent the flicker of fluorescent lamps by providing a high frequency sine wave generator and lighting a plurality of the fluorescent lamps using a high frequency power source. CONSTITUTION:An a.c. motor 1 rotated using a commercial power source rotates a high frequency generator 2 through a speed increasing mechanism. The speed increasing mechanism selects a speed increasing ratio so as to generator a high frequency sine wave a.c. over 1kHz on the output side of the generator 2 according to the revolutional number of the motor 1. Then, respective fluorescent lamps are lighted using the generated high frequency sine wave as a power source. As the above power source is high frequency over 1kHz, the flicker is remarkably reduced. In addition, as the power source has a sine wave, it is possible to eliminate radio wave trouble without disturbing the other radio wave and the waveform as a control signal. Further, by using high frequency, the accessaries of the fluorescent lamp can be miniaturized. |
