《A Control Circuit With Load-Current Injection for Single-Phase 》.pdf

1272 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 54, NO. 3, JUNE 2007 A Control Circuit With Load-Current Injection for Single-Phase Power-Factor-Correction Rectifiers Emilio Figueres, Associate Member, IEEE , José Manuel Benavent, Gabriel Garcerá, Member, IEEE, and Marcos Pascual, Associate Member, IEEE Abstract—A load-current-injection control technique for boost- i , v , v , i Inputs and output of the multiplier/ gm ff c M derived power-factor-correction (PFC) rectifiers with average divider block (both iM and igm are current current-mode control is proposed in this paper. By adding a load- signals in most power-factor-correction current loop to the conventional inductor current loop, the output voltage response to load steps is speeded up, almost eliminating the integrated circuits). typical voltage overshoots of this kind of converters. Although the viL ref Reference signal for the inductor current con- techniques based on the load-current injection are traditionally trol loop. called “load feedforward,” this paper shows that an additional K = i /v . Sensing gain of the rectified input v gm g feedback loop, which modifies the linear small-signal model of the voltage. converter, is also introduced. In order to validate the concept, a K = v /v