HIGH EFFICIENCY ROLLER SHADE

摘要

The invention is concerned with a system for operating a roller shade. The system comprises a roller configured to be attached to a shade; a DC motor having a rated voltage, the DC motor operatively connected to the roller and configured to rotate the roller; and a DC power source operatively connected to the DC motor to provide DC power to the DC motor at an average voltage. A maximum average voltage the DC power source can supply the DC motor is approximately half or less than half the rated voltage of the DC motor.