| 摘要 |
PURPOSE:To improve a power factor by connecting in series a simulated capacitor circuit provided with a property of a phase advancing current to the impressed AC voltage to an AC power supply and a discharge lamp. CONSTITUTION:An AC power supply 1, a discharge lamp 2 and a simulated capacitor circuit 3 are provided being connected serially. The simulated capacitor circuit 3 is provided with a property of flowing an advancing phase current to the impressed AC voltage, while being provided with four transistors Q1 to Q4 as semiconductor switching elements controlling charge and discharge of this capacitor C being connected to the main capacitor C in a bridge form, and a single chock L connected between a connection middle point of the transistors Q1, Q2 and a discharge lamp 2. Thereby, a point of a power factor to power supply can be cancelled and corrected while improving the power factor, for example, by using it in the form of combining with such in the simulated inductor circuit system, or the like. |
