EPE Association: EPE 2020 - LS5c: EMI/EMC in Power Electronics

EPE 2020 - LS5c: EMI/EMC in Power Electronics
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 02: Power Converter Topologies and Design > EPE 2020 - LS5c: EMI/EMC in Power Electronics

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   Analysis of Switching Performance and EMI Emission of SiC Inverters under the Influence of Parasitic Elements and Mutual Couplings of the Power Modules
By Mohammad ALI [View]
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Abstract: Parasitic elements and mutual couplings of SiC half-bridge modules strongly affect the switchingcharacteristics of devices. They excite overshoots and oscillations that further contribute to increasedEMI emissions. This paper will explain and analyze such effects on the switching performance andEMI emissions, based on 3D FEM models of the module. It can be said that knowledge about theeffects of parasitic elements and mutual couplings on the switching behavior is an important basis forthe design guidelines of fast switching wide-bandgap (WBG) power converters. A three-phase DC-ACinverter prototype with three SiC half-bridge MOSFET modules and an EMI measurement test setupare constructed for the experiments. The experiments results are validated with simulation results.

   Common mode noise modelling and resonant estimation in a three-phase motor drive system: 9-150 kHz frequency range
By Hansika RATHNAYAKE [View]
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Abstract: This paper presents an equivalent circuit impedance-based estimation method of resonances in a threephase motor drive system to predict common-mode (CM) noise circulations in 9-150 kHz frequency range, which is not considered so far in electromagnetic interference (EMI) analysis. The paper verifies the presented method by analyzing emission spectrums of CM currents in the three-phase system. The impact of EMI filter, DC-link filter and AC motor models on the generated common mode noise at 9-150 kHz range is also investigated using the predicted equivalent impedance results at the CM voltage source. It is found, there is a high probability to have resonances within 9-150 kHz range due to the components of the drive system. Hence, the work presented is useful to model and predict the possible resonances in the whole drive system that unnecessarily increases the CM noise at this frequency range. The presented estimation method not only enables the ability to early recognition of CM current emissions injected from the drive system to the grid but also supports EMI filter design or modification for 9-150 kHz frequency range. Further, this approach significantly contributes to accelerating the drive products development and entering the market after complying the future standards.

   Differential Model EMI Filter Analysis for Interleaved Boost PFC Converters Considering Optimal Phase Shifting
By NASER NOURANI ESFETANAJ [View]
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Abstract: Interleaved Power Factor Correction (PFC) has become a most popular topology from efficiency and power density point of view over single-switch boost PFC. The dependency of the Differential Model (DM) Electromagnetic Interference (EMI) noise magnitude on input current ripple leads to investigate the influence of the interleaved technique on EMI noise. Hence, this paper provides a comprehensive investigation for the design of DM EMI filter a single-phase interleaved PFC targeting to minimize component size. It is shown how different operation modes (continuous and discontinuous conduction mode) and switching frequency may influence the required filter attenuation and, consequently, the EMI filter size. Furthermore, the impact of the number of interleaved stages and optimal phase shifting on the required filter attenuation is analyzed. Finally, the influence of optimal phase shifting achieve an overall minimum EMI filter corner frequency is discussed. Experimental results from a 2 kW interleaved single-phase boost PFC converter validate the effectiveness of the proposed optimal phase shifting method.

   Investigating the Effect of Different Parameters on Harmonics and EMI Emissions at the Frequency Range of 0-9 kHz
By Amir GANJAVI [View]
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Abstract: Due to the increasing use of fast switching semiconductors, emissions affected by the Adjustable SpeedDrives (ASDs) are entering the new frequency range of 2-150 kHz. Emissions at this new frequencyrange are categorised into 2-9 and 9-150 kHz ranges among the standardization communities.Consequently, designing new filters for theses frequency ranges is of the determined efforts by ASDmanufacturers. In this paper, essential factors impacting on the filter design in ASDs for 0-2 kHz andthe new frequency range of 2-9 kHz are investigated. Non-linear effects of DC link filter on low orderharmonic emissions of 0-2 kHz is investigated to understand how the existing filters can comply withthe emerging standard of 2-150 kHz. Moreover, a system model is presented to predict the effects ofcables and Electromagnetic Interference (EMI) filter parameters on resonances at the frequency rangeof 2-9 kHz.

EPE 2020 - LS5c: EMI/EMC in Power Electronics
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 02: Power Converter Topologies and Design > EPE 2020 - LS5c: EMI/EMC in Power Electronics
	[return to parent folder]

	Analysis of Switching Performance and EMI Emission of SiC Inverters under the Influence of Parasitic Elements and Mutual Couplings of the Power Modules By Mohammad ALI	[View] [Download]
Abstract: Parasitic elements and mutual couplings of SiC half-bridge modules strongly affect the switchingcharacteristics of devices. They excite overshoots and oscillations that further contribute to increasedEMI emissions. This paper will explain and analyze such effects on the switching performance andEMI emissions, based on 3D FEM models of the module. It can be said that knowledge about theeffects of parasitic elements and mutual couplings on the switching behavior is an important basis forthe design guidelines of fast switching wide-bandgap (WBG) power converters. A three-phase DC-ACinverter prototype with three SiC half-bridge MOSFET modules and an EMI measurement test setupare constructed for the experiments. The experiments results are validated with simulation results.

	Common mode noise modelling and resonant estimation in a three-phase motor drive system: 9-150 kHz frequency range By Hansika RATHNAYAKE	[View] [Download]
Abstract: This paper presents an equivalent circuit impedance-based estimation method of resonances in a threephase motor drive system to predict common-mode (CM) noise circulations in 9-150 kHz frequency range, which is not considered so far in electromagnetic interference (EMI) analysis. The paper verifies the presented method by analyzing emission spectrums of CM currents in the three-phase system. The impact of EMI filter, DC-link filter and AC motor models on the generated common mode noise at 9-150 kHz range is also investigated using the predicted equivalent impedance results at the CM voltage source. It is found, there is a high probability to have resonances within 9-150 kHz range due to the components of the drive system. Hence, the work presented is useful to model and predict the possible resonances in the whole drive system that unnecessarily increases the CM noise at this frequency range. The presented estimation method not only enables the ability to early recognition of CM current emissions injected from the drive system to the grid but also supports EMI filter design or modification for 9-150 kHz frequency range. Further, this approach significantly contributes to accelerating the drive products development and entering the market after complying the future standards.

	Differential Model EMI Filter Analysis for Interleaved Boost PFC Converters Considering Optimal Phase Shifting By NASER NOURANI ESFETANAJ	[View] [Download]
Abstract: Interleaved Power Factor Correction (PFC) has become a most popular topology from efficiency and power density point of view over single-switch boost PFC. The dependency of the Differential Model (DM) Electromagnetic Interference (EMI) noise magnitude on input current ripple leads to investigate the influence of the interleaved technique on EMI noise. Hence, this paper provides a comprehensive investigation for the design of DM EMI filter a single-phase interleaved PFC targeting to minimize component size. It is shown how different operation modes (continuous and discontinuous conduction mode) and switching frequency may influence the required filter attenuation and, consequently, the EMI filter size. Furthermore, the impact of the number of interleaved stages and optimal phase shifting on the required filter attenuation is analyzed. Finally, the influence of optimal phase shifting achieve an overall minimum EMI filter corner frequency is discussed. Experimental results from a 2 kW interleaved single-phase boost PFC converter validate the effectiveness of the proposed optimal phase shifting method.

	Investigating the Effect of Different Parameters on Harmonics and EMI Emissions at the Frequency Range of 0-9 kHz By Amir GANJAVI	[View] [Download]
Abstract: Due to the increasing use of fast switching semiconductors, emissions affected by the Adjustable SpeedDrives (ASDs) are entering the new frequency range of 2-150 kHz. Emissions at this new frequencyrange are categorised into 2-9 and 9-150 kHz ranges among the standardization communities.Consequently, designing new filters for theses frequency ranges is of the determined efforts by ASDmanufacturers. In this paper, essential factors impacting on the filter design in ASDs for 0-2 kHz andthe new frequency range of 2-9 kHz are investigated. Non-linear effects of DC link filter on low orderharmonic emissions of 0-2 kHz is investigated to understand how the existing filters can comply withthe emerging standard of 2-150 kHz. Moreover, a system model is presented to predict the effects ofcables and Electromagnetic Interference (EMI) filter parameters on resonances at the frequency rangeof 2-9 kHz.