Single voltage-loop sensorless control in Power Factor Correction for AC /DC power simplifies hardware while maintaining high performance

https://www.eurekalert.org/news-releases/1110207

"bulky/ costly current sensor elimination... derives duty cycle using only inductor voltage equation, split into feedforward/ control components... built-in delay compensation ensures current/ voltage perfectly aligned... implements on standard digital signal processors avoiding complex mathematical observers/ models... 1.3 kW prototype: up to 0.9998 power factor, low 2.12% total harmonic distortion at full load, high tolerance for variations in circuit parameters, for scalability... slimmer laptop adapters, compact chargers"