Isolated input current sense means for high power factor rectifi

Details Isolated input current sense means for high power factor rectifi Isolated input current sense means for high power factor rectifi

1994-06-09

1996-11-05

Nguyen, Matthew V.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

323222, H02M 704, G05F 1625

Patent

active

055724167

ABSTRACT:
A converter for enhancing power factor utilizes a line sense winding magnetically coupled to sense a voltage across a line inductor in the input of a high power factor power converter. This winding in the illustrative embodiment is typically a single turn. This winding provides a measurement of the derivative (with respect to time) of the line current, and a specially designed integrator connected to the winding provides the estimate of the line current. An integrator is operative to accurately estimate the current by using known properties of this current to prevent mismeasurement due to reconstructing the "constant of integration" and any small biases in the integrator which normally cause errors.

REFERENCES:
patent: 4672300 (1987-06-01), Harper
patent: 5391976 (1995-02-01), Farrington et al.
patent: 5450029 (1995-09-01), Jacobs et al.
patent: 5479336 (1995-12-01), Motoki et al.
patent: 5489837 (1996-02-01), Arakawa

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