EMERGENCY DIMMING APPARATUS

摘要

An emergency dimming apparatus. The emergency dimming apparatus includes an input, a charger, an energy storage device, a power conversion device, an emergency control output, and a controller. The input is configured to receive a line voltage. The charger is configured to receive the line voltage and generate a charging voltage. The energy storage device is configured to receive the charging voltage and selectively output a stored voltage. The power conversion device is configured to convert the stored voltage to an output voltage. The emergency control output is configured to output an emergency control signal. The controller includes a processor and a memory. The controller is configured to monitor the line voltage, determine if the line voltage has crossed a threshold, output the output voltage when the line voltage has crossed the threshold, and output an emergency control signal when the line voltage has crossed the threshold.