IEEE Transactions on Electromagnetic Compatibility · 2020 · 35 citations · 28 references
EngineeringElectrical EngineeringAnalog ElectronicsCircuit TheoryPower ElectronicsActive FiltersElectromagnetic CompatibilityHigh-frequency Power ConversionMagnetic ComponentsNoise ReductionNoise Reduction DesignCurrent CompensationCurrent-mode Active FiltersCurrent-mode FiltersElectromagnetic InterferenceElectromagnetic Interference MitigationElectromagnetic Interference ReductionElectromagnetic Interference SuppressionFeedforward Compensation
This paper proposes a balanced feedforward current-sense current-compensation (CSCC) common-mode (CM) active electromagnetic interference (EMI) filter (AEF). The advantages of the feedforward CSCC-type AEF are theoretically demonstrated. The operation of the proposed AEF is completely analyzed, and practical design guidelines are developed regarding performance and stability. The proposed AEF is applied to an L-C-L EMI filter for a 2.2 kW resonant inverter, and CM noises are further reduced by 3 to 18 dB from 150 kHz to 10 MHz. The problem of CM-to-differential mode noise transformation due to an unbalanced AEF structure is also investigated by the measurements using a vector network analyzer.
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