The effect of duty cycle on SMPS common mode emissions: theory and experiment

Nave, M.J.

doi:10.1109/apec.1989.36946

Cited by 15 publications

(10 citation statements)

References 1 publication

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“…With this in mind many efforts have been made to model and characterize (EMI) noise emissions of a particular device or system in power electronics [1,. However, there is still no definitive way for a unified approach of The modeling of EMI can generally be broken down into two categories: detailed, physics based modeling [21][22][23][24][25][26][27][28][29][30] and behavioral modeling [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49]. Either method can be used to model the EMI propagation path or the noise source.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Reference [38] did not include all stray inductance and resistance in the impedance model and it only investigated the CM with an accuracy only up to a couple MHz (due to the fact it did not include all impedances). Some papers that only investigated CM are [39][40], where others only DM [41] and if they investigate both phenomena they are usually separate models for CM and DM [36,[42][43][44]. Often the focus is only on the equivalent noise impedance or the noise source.…”

Section: Behavioral (Terminal) Modeling Approachmentioning

confidence: 99%

“…When the noise impedance is the focus of a particular work an idealized noise source is used [39,[45][46][47][48]. This is usually of the form of a pulsed voltage source that mimics the switched voltage across a switch.…”

Section: Behavioral (Terminal) Modeling Approachmentioning

confidence: 99%

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Generalized Terminal Modeling of Electromagnetic Interference

Baisden

Boroyevich

Wang

2010

IEEE Trans. on Ind. Applicat.

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Terminal models have been used for various power electronic applications. In this work a two-and three-terminal black box model is proposed for electro-magnetic interference (EMI) characterization. The modeling procedure starts with a time-variant system at a particular operating condition, which can be a converter, set of converters, sub-system or collection of components. A unique, linear equivalent circuit is created for applications in the frequency domain. Impedances and current / voltage sources define the noise throughout the entire EMI frequency spectrum. All parameters needed to create the model are clearly defined to ensure convergence and maximize accuracy.The model is then used to predict the attenuation caused by a filter with increased accuracy over small signal insertion gain measurements performed with network analyzers. Knowledge of EMI filters interactions with the converter allows for advanced techniques and design constraints to optimize the filter for size, weight, and cost. Additionally, the model is also demonstrated when the operating point of the system does not remain constant, as with AC power systems.Modeling of a varying operating point requires information of all the operating conditions for a complete and accurate model. However, the data collection and processing quickly become unmanageable due to the large amounts of data needed. Therefore, simplification techniques are used to reduce the complexity of the model while maintaining accuracy throughout the frequency spectrum.The modeling approach is verified for linear and power electronic networks including: a dcdc boost converter, phase-leg module, and a simulated dc-ac inverter. The accuracy of the model is confirmed up to 100 MHz in simulation and at least 50 MHz for experimental validation.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Behavioral (Terminal) Modeling Approachmentioning

confidence: 99%

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Generalized Terminal Modeling of Electromagnetic Interference

Baisden

Boroyevich

Wang

2010

IEEE Trans. on Ind. Applicat.

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“…The DC bus equivalent stray inductances, the switches lead parasitic inductances, the equivalent H-F representation of the filtering capacitance Cdc and the equivalent parasitic capacitance between the floating voltages and the ground Cp are taken into account. A line impedance stabilization network (USN) is connected between (1) (2) Modeling noise sources by trapezoidal waveforms Classically, authors represent the electrical waveforms in semi-conductors by a linearized and simplified representation like a trapezoidal one [6], [7] [8], and [9]. The classical common mode EMI model proposed by [10] as shown in fig.2 uses a trapezoidal voltage source which represents the diode voltage Vd, the equivalent H-F representation of the DC link capacitor and the parasitic capacitance Cp which represents the CM propagation path.…”

mentioning

confidence: 99%

“…The classical common mode EMI model proposed by [10] as shown in fig.2 uses a trapezoidal voltage source which represents the diode voltage Vd, the equivalent H-F representation of the DC link capacitor and the parasitic capacitance Cp which represents the CM propagation path. Fig.3 shows the conventional differential mode EMI model proposed by [8], it is composed by a trapezoidal current source lmos which represents the current seen by the DC link and by the DC link capacitor with its parasitic elements which represents the propagation path. The other switching behaviors like voltage overshoots, diode reverse-related-recovery current and high frequency oscillations are not considered.…”

mentioning

confidence: 99%

Fast modeling of conducted EMI phenomena using improved classical models

Fakhfakh

Alahdal

Ammous

2016

2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)

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Differential mode noise modelling and analysis through high‐frequency equivalent circuit of a single‐phase inverter

Kim

Seng

Seo

et al. 2022

IET Power Electronics

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This paper proposes the prediction method of differential mode noise transmitted to the input power of a single‐phase inverter in a high‐frequency model. A high‐frequency equivalent circuit considering the parasitic impedance is proposed. This paper presents a method to measure the parasitic impedance included in the DC link capacitor and insulated‐gate bipolar transistor (IGBT) using a network analyser and extract the parasitic impedance included in the DC bus plate and PCB using Q3D. A mathematical analysis is proposed by applying the double integral Fourier form to the current noise sources, and a method for obtaining differential‐mode noise by analysing the impedance path is proposed. The switching of IGBT is modelled as the noise current source that reflects the pulse width modulation (PWM) duty change using the double integral Fourier form. The impedance path of differential mode noise transmitted to the input is mathematically analysed. The differential mode noise affecting the input is modelled by multiplying the impedance path and the noise source current. The validity of the proposed high‐frequency equivalent circuit and the mathematical analysis is verified by the less than 5% error in the resonant frequency of the derived differential mode noise voltage and the resonant frequency measured experimentally.

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The effect of duty cycle on SMPS common mode emissions: theory and experiment

Cited by 15 publications

References 1 publication

Generalized Terminal Modeling of Electromagnetic Interference

Generalized Terminal Modeling of Electromagnetic Interference

Fast modeling of conducted EMI phenomena using improved classical models

Differential mode noise modelling and analysis through high‐frequency equivalent circuit of a single‐phase inverter

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