Automatic EMI Measurement and Filter Design System for Telecom Power Supplies

Chiu, Huang‐Jen; Pan, Tian-Fu; Yao, Chun-Jen; Lo, Yu‐Kang

doi:10.1109/tim.2007.907948

Cited by 11 publications

(6 citation statements)

References 10 publications

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“…The concept of DC power distribution has been there for telecommunication facilities [44], [45] as well as data centers [46]- [49]. Reference [50] mentions a practical DC data center.…”

Section: Miscellaneousmentioning

confidence: 99%

Enhancing the Energy/Power Efficiency of a DC Distribution Grid for Residential Buildings via Modular Architecture of DC/DC Solid State Transformers

Dastgeer¹,

Gelani²,

Faisal³

et al. 2018

Adv. sci. technol. eng. syst. j.

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DC power is apparently attempting to breach into the power system-the system which it once lost to the AC power paradigm. DC is already present in the generation, transmission and utilization sides of the system, leaving distribution as the only area where it has not shown any significant presencethis may be regarded as still in research phase. The current work aims to investigate efficiency enhancement of a DC power distribution system for residential buildings via the use of a modular approach for the DC/DC solid state transformers (SSTs). Specifically, DC distribution system shows reduced efficiency at light loads because of the lowering in efficiency of its constituent SSTs. Via the use of modular approach, a single SST is composed of smaller modules which may be turned on or off individually, for the purpose of improving the converter efficiency. In this paper, we utilize two methods of load division upon SST converter modules. As the efficiency of an SST is increased, the overall efficiency of the system increases because bulk power passes through these transformers.

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“…The concept of DC power distribution has been there for telecommunication facilities [44], [45] as well as data centers [46]- [49]. Reference [50] mentions a practical DC data center.…”

Section: Miscellaneousmentioning

confidence: 99%

Enhancing the Energy/Power Efficiency of a DC Distribution Grid for Residential Buildings via Modular Architecture of DC/DC Solid State Transformers

Dastgeer¹,

Gelani²,

Faisal³

et al. 2018

Adv. sci. technol. eng. syst. j.

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“…To mitigate conducted emissions, power line electromagnetic interference (EMI) filters are commonly used. However, at frequencies ranging from several hundred kilohertz to a few tens of megahertz the performance of EMI filters is typically undermined by parasitic effects such as parasitic parallel capacitances between windings in inductors and parasitic series inductances of capacitors [2][3][4][5]. Therefore, characterizing the response of these components at those high frequencies is becoming increasingly important to reduce design time, cost and size of the filter.…”

Section: Introductionmentioning

confidence: 99%

“…Common mode chokes (CMCs), made up of a pair of tightly coupled inductors, are key components of EMI filters primarily intended to limit common mode (CM) noise [2,5]. However, CMCs typically exhibit an inductive response to differential mode (DM) noise (leakage inductance) which has a significant impact on the attenuation that the EMI filter provides to differential mode (DM) noise [2].…”

Section: Introductionmentioning

confidence: 99%

Simple Setup for Measuring the Response to Differential Mode Noise of Common Mode Chokes

et al. 2020

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This work presents a technique to measure the attenuation of differential mode noise provided by common mode chokes. The proposed setup is a simpler alternative to the balanced setup commonly employed to that end, and its main advantage is that it avoids the use of auxiliary circuits (baluns). We make use of a modal analysis of a high-frequency circuit model of the common mode choke to identify the natural modes actually excited both in the standard balanced setup and in the simpler alternative setup proposed here. This analysis demonstrates that both setups are equivalent at low frequencies and makes it possible to identify the key differences between them at high frequencies. To analyze the scope and interest of the proposed measurement technique we have measured several commercial common mode chokes and we have thoroughly studied the sensitivity of the measurements taken with the proposed setup to electric and magnetic couplings. We have found that the proposed setup can be useful for quick assessment of the attenuation provided by a common mode choke for differential mode noise in a frequency range that encompasses the frequencies where most electromagnetic compatibility regulations impose limits to the conducted emissions of electronic equipment.

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“…In this case the high number of iterations, usually needed to obtain the optimal or sub-optimal solution, results in a high time consuming procedure. Finally, a PC-based automatic EMI filter design method without any volume minimization implications is proposed in [9], whereas an optimization of the DM EMI filter utilizing some constant factors has been done by minimizing the filter volume function [10], where it is demonstrated that an optimal number of filter stages leads to the minimal occupied volume.…”

Section: Introductionmentioning

confidence: 99%

Computer aided optimal design of high power density EMI filters

Ala

Giaconia

Giglia

et al. 2016

2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC)

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Abstract-Power density of power converter systems is becoming an increasing crucial design constraint for a wide range of technical applications. Size reduction of EMI filter in power converters is an important challenge due to its significant impact on the overall converter volume and weight. In order to take on this issue, a computer aided procedure for a fast selection of optimal discrete EMI filter components and layout is described in this paper. The proposed technique is a rule-based automatic procedure based on a suitable database that considers the commercially available data sheets of passive components (e.g. magnetic cores, capacitors). It allows the minimization of the filter's volume and therefore the improvement of the converter's power density. The size and the performance of an EMI filter designed by using the proposed procedure, have been compared with those of a conventionally designed one. The comparison demonstrates the effectiveness of the proposed method.

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Automatic EMI Measurement and Filter Design System for Telecom Power Supplies

Cited by 11 publications

References 10 publications

Enhancing the Energy/Power Efficiency of a DC Distribution Grid for Residential Buildings via Modular Architecture of DC/DC Solid State Transformers

Enhancing the Energy/Power Efficiency of a DC Distribution Grid for Residential Buildings via Modular Architecture of DC/DC Solid State Transformers

Simple Setup for Measuring the Response to Differential Mode Noise of Common Mode Chokes

Computer aided optimal design of high power density EMI filters

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