Abstract: A dynamic damper in a lighting driving circuit for limiting an inrush current includes a damper circuit and a timing circuit comprising capacitor. The damper circuit is connected to the timing circuit. When an input voltage is provided to the dynamic damper, the capacitor begins to be charged and the capacitance-voltage of the capacitor rises. The damper circuit enters to a first working state and generates a dynamic damper resistor value. When the capacitance-voltage of the capacitor is greater than a first threshold voltage, the damper circuit enters to a second working state and the dynamic damper resistor value begins to decrease. When the capacitance-voltage of the capacitor is greater than a second threshold voltage, the damper circuit enters to a short-circuit state, and the dynamic damper resistor value decreases to zero to facilitate the normal work of the power source converter.

Abstract: A solar energy conversion apparatus includes a solar energy conversion unit and a ground fault detection and interruption unit. The ground fault detection and interruption unit includes a switch subunit, a control subunit, and a leakage current sensing subunit. The control subunit is configured to turn off the switch subunit when the leakage current sensing subunit senses that a leakage current passing through the leakage current sensing subunit exceeds a predetermined leakage current threshold.

Abstract: A surge suppression apparatus is applied to an alternating current power supply apparatus. The surge suppression apparatus includes a rectification unit and a first transient voltage surge suppressor. The rectification unit includes a first diode, a second diode, a third diode, and a fourth diode. The first transient voltage surge suppressor is electrically connected to the first diode, the second diode, the third diode, and the fourth diode. The alternating current power supply apparatus is electrically connected to the first diode, the second diode, the third diode, and the fourth diode. The first diode is electrically connected to the second diode and the third diode. The fourth diode is electrically connected to the second diode and the third diode.

Abstract: A dynamic damper in a lighting driving circuit for limiting an inrush current includes a damper circuit and a timing circuit comprising capacitor. The damper circuit is connected to the timing circuit. When an input voltage is provided to the dynamic damper, the capacitor begins to be charged and the capacitance-voltage of the capacitor rises. The damper circuit enters to a first working state and generates a dynamic damper resistor value. When the capacitance-voltage of the capacitor is greater than a first threshold voltage, the damper circuit enters to a second working state and the dynamic damper resistor value begins to decrease. When the capacitance-voltage of the capacitor is greater than a second threshold voltage, the damper circuit enters to a short-circuit state, and the dynamic damper resistor value decreases to zero to facilitate the normal work of the power source converter.