High efficiency roller shade

摘要

A motorized roller shade is provided. The motorized roller shade includes a shade tube in which a motor unit, a controller unit and a power supply unit are disposed. The controller unit includes a controller to control the motor. The power supply unit includes at least one bearing rotatably coupled to a support shaft. The motor unit includes at least one bearing, rotatably coupled to another support shaft, a DC gear motor and a counterbalancing device. The output shaft of the DC gear motor is coupled to the support shaft such that the output shaft and the support shaft do not rotate when the support shaft is attached to a mounting bracket.

主权项

1. A system for operating a roller shade comprising:
a roller tube; a shade operably connected to the roller tube; a DC motor; the DC motor having a rated voltage; the DC motor operatively connected to the roller tube and configured to rotate the roller; a DC power source; the DC power source operatively connected to the DC motor and configured to provide DC power to the DC motor at an average voltage; wherein a maximum average voltage the DC power source can supply the DC motor is less than half the rated voltage of the DC motor; a counterbalance assembly; the counterbalance assembly operatively connected to the roller tube and configured to provide a counterbalance force to the roller tube.