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Electromagnetic interference (EMI) and its filtering are important considerations in switching power converter design. It has been recognized that an EMI filter must be sufficiently damped in order to avoid undesirable interactions with the converter or the source, which otherwise may lead to instability and degraded control performance. Optimal damping of single-stage LC filters that achieves maximal...
Damping of EMI filter input impedance to avoid resonance with the source output impedance is presented. Optimization of the damping resistor to maximize the damping effects for a given damping capacitor or inductor while minimizing the power loss is proposed. Three different damping circuits are studied, and for each, an analytical model defining the optimal damping resistance is presented. Performances...
Parallel operation of PWM rectifiers and inverters has been used in UPS, motor drives, telecom power supply, and other applications to reduce system development cost and to provide easy power scalability as well as redundancy. Conventional symmetric interleaving can eliminate certain harmonics and their sideband components but is not necessarily optimal for EMI filter design if the filter attenuation...
This paper presents a new current control method for dual-boost power-factor-corrected (PFC) converters which avoids the need for sensing the ac input current. The control method is a generalization to the nonlinear average current control previously developed for boost PFC converters that has demonstrated better control performance and reduced sensitivity to noise. The generalized method for dual-boost...
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