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To reduce the current loop reference distortion in traditional average current control and total harmonic distortion of line current, this paper employs improved average current control (IACC) of Boost PFC, in which a digital-generated unit sinusoidal half-wave (USHW) is introduced as current loop sinusoidal reference. Aimed at generating USHW with DSP's enhanced capture module correctly and conveniently,...
It's known that single-phase power factor correction (PFC) converter has second-order harmonic currents (SHC), which results in voltage ripple on DC load. The active storage unit (ASU) is employed to absorb SHC with ASU's input current (iasu) following SHC. In order to accurately extract ASU's current reference (iasu*) in a simple way, a real-time calculation method is proposed. At the same time,...
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