Power factor control for switched mode rectifiers

Details Power factor control for switched mode rectifiers Power factor control for switched mode rectifiers

1996-10-22

1997-11-11

Wong, Peter S.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 89, 323222, H02M 706, H02M 542, G05F 1652

Patent

active

056870701

ABSTRACT:
A power factor correction system with an EMI input filter includes circuitry to sense the capacitor current of the filter to improve the accuracy of the power factor enhancement by providing a split current sensing resistor connected to the EMI filter or a voltage sensing capacitor. Both arrangements may be tightly coupled to the current control loop of the power factor control and compensate for the unsensed current in the EMI filter capacitors.

REFERENCES:
patent: 4677366 (1987-06-01), Wilkinson et al.
patent: 4683529 (1987-07-01), Bucher, II
patent: 5001620 (1991-03-01), Smith
patent: 5012058 (1991-04-01), Smith
Kelkar and Lee, "A Novel Input Filter Compensation Scheme for Switching Regulators", PESC, pp. 260-271, Jun. 14, 1982.
Kelkar and Lee, "Adaptive Input Filter Compensation for Switching Regulators", IEEE Trans. Aerospace and Electronic Systems, vol. AES-20, No. 1, pp. 57-66, Jan. 1984.
Todd, "UC3854 Controlled Power Factor Correction Circuit Design", Unitro Application Note, (Unitrobe Integrated Circuits of Merrimack, NH; Integrated Circuits/ U-134), pp. 10-303 through 10-322 May 1982.
Andreycak, "Optimizing Performance in UC3854 Power Factor Correction Applications", Unitro Design Note, (Unitrobe Integrated Circuits of Merrimack, NH; Integrated Circuits/ DN-39-E), pp. 10-527 through 10-531).

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