Measurement of In-Circuit Common-Mode Impedance at the AC Input of a Motor Drive System
Zhenyu Zhao, Fei Fan, Arjuna Weerasinghe, Pengfei Tu, Kye Yak See
Abstract
The in-circuit common-mode (CM) impedance at the AC input of a motor drive system (MDS) provides valuable inputs for evaluating and estimating the CM electromagnetic interference (EMI) noise generated by the switching of power semiconductor devices in the MDS. This paper introduces a single-probe setup (SPS) with frequency-domain measurement to extract the in-circuit CM impedance of a MDS under its different operating modes. The SPS has the merits of noncontact measurement and simple structure.
Topics & Concepts
EMICommon-mode signalElectromagnetic interferenceElectrical impedanceNoise (video)Electrical engineeringEquivalent circuitElectronic engineeringMotor driveCommon-mode rejection ratioComputer scienceEngineeringVoltageOperational amplifierAmplifierCMOSMechanical engineeringDigital signal processingImage (mathematics)Analog signalArtificial intelligenceElectromagnetic Compatibility and Noise SuppressionElectrostatic Discharge in ElectronicsElectromagnetic Compatibility and Measurements