POWER DEVICE

摘要

An energy efficient apparatus includes a switching device, a frequency dependent reactive device, and a control element is provided. The switching device is coupled to a source of electrical power and includes a pair of transistors and is adapted to receive a control signal and to produce an alternating current power signal. The frequency of the alternating current power signal is responsive to the control signal. The frequency dependent reactive device is electrically coupled to the pair of transistors for receiving the alternating current power signal and producing an output power signal. The frequency dependent reactive device is chosen to achieve a desired voltage of the output power signal relative to the frequency of the alternating current power signal. The control element senses an actual voltage of the direct current power signal and modifies the control signal delivered to achieve the desired voltage of the direct current power signal.

主权项

1. A method for operating an apparatus for delivering power to an electrical device, the apparatus being coupled to a source of electrical power for receiving an input power signal from the source of electrical power and delivering an output power signal to the electrical device, the apparatus including a controller and a voltage reduction circuit including a first pair of switching devices coupled to a first capacitor and a second pair of switching devices coupled to a second capacitor, the method including the controller performing the steps of:
detecting an input power signal being received from the source of electrical power; initiating a start-up routine including detecting a current draw of the electrical device upon detecting the input power signal; initiating a sleep mode if the current draw of the electrical device is not detected, initiating a predefined sleep period, and reinitiating the start-up routing upon expiration of the predefined sleep period; and initiating a charging routine if the current draw of the electrical device is detected, the charging routine including transmitting a control signal to the first and the second pairs of switching devices to produce an alternating current (AC) power signal that is delivered to the first and the second capacitors, the frequency of the AC power signal being responsive to the control signal, the first and the second capacitors for receiving the AC power signal from the first and the second pairs of switching devices and producing the output power signal having a voltage level that is less than a voltage level of the input power signal.