Multiple Slope Switching Waveform Approximation to Improve Conducted EMI Spectral Analysis of Power Converters

Meng, Jin; Ma, Wei; Pan, Qijun; Zhang, Lei; Zhao, Zhihua

doi:10.1109/temc.2006.882859

Cited by 76 publications

(38 citation statements)

References 10 publications

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“…This result supports the ob and dv/dt are strongly related to the genera trapezoidal waveform, the amplitudes frequency spectral components are reduc every ten-fold increase in rise/fall time (a losses), as described by equation (3) in [2]. If a waveform may be described by a se impulses in a time-derivative of finite orde coefficients may be obtained by waveforms sed waveforms are ysis of converter nsitive to the highwaveforms [3], the re widely used to between waveform ers may be emitted a structures [6], for his paper refers to a tives dv/dt, d 2 …”

Section: Trapezoidal Switching Waveform Appsupporting

confidence: 75%

Synthesizing power electronic switching waveforms for reduced EMI generation

Oswald¹,

Stark²,

Hargis³

et al. 2010

5th IET International Conference on Power Electronics, Machines and Drives (PEMD 2010)

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A method of analysing switching waveforms using their derivative terms shows that imposing an ‘S-shaped’ profile on the switching transitions offers significant improvements in the control of power loss and radiated EMI in power converters. Numerical modelling to investigate the effects of varying the timing parameters of the waveforms enables switching transients to be shaped to reduce high-frequency spectral content. The resulting synthesized waveforms are used to demonstrate experimentally that total high-frequency power content is reduced without any associated increase in switching time and therefore power loss

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Section: Trapezoidal Switching Waveform Appsupporting

confidence: 75%

Synthesizing power electronic switching waveforms for reduced EMI generation

Oswald¹,

Stark²,

Hargis³

et al. 2010

5th IET International Conference on Power Electronics, Machines and Drives (PEMD 2010)

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“…[13]. The turn-on and turn-off dynamics were investigated by dividing the nonlinear transitions into several stages based on an IGBT behavior circuit model.…”

Section: Emi Analysis Including Igbt Nonlinear Switching Transient Modelmentioning

confidence: 99%

Precise methods for conducted EMI modeling, analysis, and prediction

Zhao

Meng

et al. 2008

Sci. China Ser. E-Technol. Sci.

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Focusing on the state-of-the-art conducted EMI prediction, this paper presents a noise source lumped circuit modeling and identification method, an EMI modeling method based on multiple slope approximation of switching transitions, and double Fourier integral method modeling PWM conversion units to achieve an accurate modeling of EMI noise source. Meanwhile, a new sensitivity analysis method, a general coupling model for steel ground loops, and a partial element equivalent circuit method are proposed to identify and characterize conducted EMI coupling paths. The EMI noise and propagation modeling provide an accurate prediction of conducted EMI in the entire frequency range (0 10 MHz) with good practicability and generality. Finally a new measurement approach is presented to identify the surface current of large dimensional metal shell. The proposed analytical modeling methodology is verified by experimental results.

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“…But using these methods in power electronics systems is costly and needs additional space for installation. Furthermore, in order for the expensive postdevelopment need for improvement in EMI compliance to be decreased, designers will face major challenges to predict the EMI noise level with reasonable accuracy for a given structure and operating mode at the design stage [3]. The non-linearity and charge storage of the IGBT and its model also increases the difficulty of predicting the EMI accurately.…”

Section: Introductionmentioning

confidence: 99%

“…An approach that attracts great research interest is to suppress EMI emissions by intervening as close as possible to their source of the EMI -the fast switching transition shape of the IGBT [1][2][3]5]. Firstly, increasing the gate resistor can reduce EMI via reducing the dv/dt.…”

Section: Introductionmentioning

confidence: 99%

Shaping pulse transitions by active voltage control for reduced EMI generation

Yang

Palmer

2013

2013 IEEE Energy Conversion Congress and Exposition

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High-performance power switching devices (IGBT/MOSFET) realise high-performance power converters. Unfortunately, with a high switching speed of the IGBT or MOSFET -freewheel diode chopper cell, the circuit has intrinsic sources of high-level EMI. Therefore, costly EMI filters or shielding are normally demanded on the load and supply side. Although an "S-shaped" voltage transient with a high order of derivation eliminates the discontinuity and could suppress HF spectrum of EMI emissions, a practical control scheme is still under development. In this paper, Active Voltage Control (AVC) is applied to successfully define IGBT switching dynamics with a smoothed Gaussian waveform so a reduced EMI can be achieved without extra EMI suppression devices.

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Multiple Slope Switching Waveform Approximation to Improve Conducted EMI Spectral Analysis of Power Converters

Cited by 76 publications

References 10 publications

Synthesizing power electronic switching waveforms for reduced EMI generation

Synthesizing power electronic switching waveforms for reduced EMI generation

Precise methods for conducted EMI modeling, analysis, and prediction

Shaping pulse transitions by active voltage control for reduced EMI generation

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