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. An apparatus, comprising:
a power circuit including: a switching device coupled to a source of electrical power, the switching device being adapted to receive a control signal and to produce an alternating current power signal, a frequency of the alternating current power signal being responsive to the control signal, the switching device including a first pair of transistors and a second pair of transistors, the first pair of transistors for driving a highside of the AC power signal, the second pair of transistors for driving a lowside of the AC power signal; and,
a frequency dependent reactive device electrically coupled to the switching device for receiving the alternating current power signal and producing an output power signal having a first voltage level, the frequency dependent reactive device including a plurality of capacitors, a first one of the capacitors being coupled to the first pair of switching devices for receiving the highside of the AC power signal, a second one of the capacitors being coupled to the second pair of transistors for receiving the lowside of the AC power signal, the capacitors being chosen to achieve a desired voltage of the output power signal relative to the frequency of the AC power signal, wherein the output power signal is a direct current power signal, the frequency dependent reactive device including a rectifier circuit coupled to the first and the second capacitors for transforming the AC power signal into the DC power signal.