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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,...
This paper proposes a load feedforward digital control scheme to optimize dynamic response of three-phase Vienna rectifier. The transient state of voltage loop in conventional average current mode control is analyzed in detail. In order to reduce overshoot of output voltage, load feedforward control is utilized to compensate voltage loop. The terms of feedforward compensator are derived assuming ideally...
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