Active buck power factor correction device

摘要

The present disclose relates to a power active buck power factor correction device, comprising: a AC source; a rectifying device coupled to the AC source for receiving and rectifying the AC source so as to generate an input voltage; a first converting device coupled to the assistance device for receiving, transmitting, converting and storing energy; a load coupled to the first converting device; and an assistance device coupled to the first converting device for generating an assistance voltage. Specifically, the polarity of the assistance voltage is same with the input voltage, but is contrary to an output voltage, so that the first converting device may continue to work and receive an input current under the input voltage is smaller than the output voltage while the discontinue time of the input current is getting shorter so as to obtain the perfected power factor correction effect.

主权项

1. An active buck power factor correction device, comprising:
an assistance device, for generating a assistance voltage; and a first converting device, coupled to the assistance device, for transferring, storing and converting energy, wherein the first converting device is a buck power correction device, and comprises a storing energy inductor, an active power switch, a diode and an output capacitor; wherein a polarity of the assistance voltage is same with an input voltage, but is contrary to an output voltage; when the active power switch is ON, and the input voltage is added to the assistance voltage, and simultaneously, the storing energy inductor and the output capacitor are charged.