ADAPTIVE NONLINEAR CURRENT OBSERVER FOR BOOST PFC AC/DC CONVERTERS

摘要

Systems, methods, and devices which estimate the inductor current in a power factor correction (PFC) converter for use with AC/DC converters. A control system for use with the PFC takes as input the input voltage and the output voltage of the PFC. Control signals for power semiconductor subcircuits in the PFC are then output from the control system. The control system uses an adaptive observer sub-circuit that estimates the inductor current and the bus voltage. The adaptive observer uses an adaptive updater which uses both the estimates and the estimate error to update the adaptive observer's estimates.

主权项

1. A power factor correction boost converter with a current transformer, the converter comprising:
a diode bridge coupled between a first coupling node and a second coupling node; an inductor coupled between said first coupling node and a third coupling node; a power semiconductor subcircuit coupled between said third coupling node and said second coupling node; an output diode coupled between said third coupling node and a positive output node; a control subsystem for controlling said first and second power semiconductor subcircuits, said control subsystem having as input an output voltage of said converter, and an input voltage of said converter, said output voltage being between said positive output node and said second coupling node, said input voltage being between said first coupling node and said second coupling node, said control system comprising: an adaptive observer subcircuit for estimating an inductor current and said output voltage.