Power factor control device

Details Power factor control device Power factor control device

2005-12-13

2005-12-13

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

C323S207000

Reexamination Certificate

active

06975524

ABSTRACT:
A power factor correction device comprising a rectifier (10) operable to receive an AC input voltage (100) and output a rectified voltage (110), and a first analog module (20) connected to the rectifier (10) so as to receive the rectified voltage (110) and generate a corresponding first output signal (120). The device (1) also comprises a second analog module (30) connected in parallel to the first module (20) and connected to the rectifier (10) so as to receive the rectified voltage (110) and generate a corresponding second output signal (130); the output signals (120, 130) are duly combined and transmitted to a load (40) in the form of a main signal (140) that defines a main current (I) and main voltage (V) of the load (40) itself. A digital controller (50) receives the rectified voltage (110) and the main signal (140) and generates, accordingly, a command signal (150) to be transmitted to the modules (20, 30) in order to regulate the input current (IIn) of the latter and thereby obtain control over the power factor (PF) of the load (40) viewed from the network (11) while simultaneously maintaining the main voltage (V) at a preset value.

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