AC to DC power converter and method with integrated line current control for improving power factor
This patent describes a power converter for converting alternating line current provided at an input to direct current delivered at an output of the power converter. It comprises: filtering means for filtering the input alternating line current, rectifying means responsive to the input current filtering means for rectifying the filtered input line current, direct current control means, operated at a substantially higher frequency than the frequency of the input alternating line current, for controlling the direct current delivered to the output of the power converter. The direct current control means particularly comprising current switching means for switching the filtered and rectified line current at high frequency and a control circuit for providing a control signal output for controlling the current switching means and an integrating means, line current sensing means, responsive to an output of the current rectifying means, for sensing the filtered and rectified line current and the integrating means responsive to the line current sensing means and to the control signal output of the control circuit of the direct current control means for integrating the sensed line current and for providing a first control signal input to the control circuit of the direct current control means.
- Assignee:
- Viteq Corp., Lanham, MD (USA)
- Patent Number(s):
- US 4943902; A
- Application Number:
- PPN: US s 7-411261
- OSTI ID:
- 6543005
- Resource Relation:
- Patent File Date: 25 Sep 1989
- Country of Publication:
- United States
- Language:
- English
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