Passive cancellation of common-mode noise in power electronic circuits

Cochrane, D.; Chen, D.Y.; Boroyevic, D.

doi:10.1109/tpel.2003.810858

Cited by 183 publications

(32 citation statements)

References 4 publications

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“…These insights are also relevant to other passive EMI cancellation techniques, such as those in [46][47][48][49].…”

Section: Discussionmentioning

confidence: 80%

“…This technique uses additional passive components to inject a compensation current that cancels the current flowing through the parasitic capacitance, thereby improving high-frequency filtering performance. The proposed technique is related to strategies that have been exploited for reducing common-mode noise in certain power supply topologies [46][47][48][49][50][51], and is applicable to a wide range filtering and power conversion designs where the parasitic feedthrough of magnetic components is an important consideration.…”

Section: Parasitic Capacitance Cancellation In Filtersmentioning

confidence: 99%

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Advanced Filters and Components for Power Applications

Neugebauer¹,

Pierquet²,

Perreault³

2006

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The objective of this thesis is to improve the high frequency performance of components and filters by better compensating the parasitic effects of practical components. The main application for this improvement is in design of low pass filters for power electronics, although some other applications will be presented.In switching power supplies the input and output filters must attenuate frequencies related to the fundamental switching frequency of the converter. The filters represent a major contribution to the weight, volume and price of the power supply. Therefore, aspects of the design of the switching power converter, especially those related to the switching frequency, are limited by the high frequency performance of the filters. The usual methods of improving the high frequency performance of the filter includes using larger, better components. Filter performance can improve by using higher quality inductors and capacitors or by adding high frequency capacitors in parallel with the filter capacitor. Also, an additional filter stage can be added. All of these methods add significant cost to the design of the power supply.If the effect of high-frequency parasitic elements in the components can be reduced (at a low cost) the performance of the filter can be enhanced. This allows the development of filters with much better high frequency attenuation, or the reduction of filter size and cost at a constant performance level. In filtering and other applications, the ability to reduce the effect of parasitic elements will be a technique that will enable many high-frequency designs.Specifically, this thesis will present two techniques that can be used to reduce the effects of parasitic inductance and capacitance. One technique, called inductance cancellation, is used to reduce the amount of parasitic inductance in a path of interest. The other technique, capacitance cancellation, will reduce the effect of a parasitic capacitance in an inductor. The techniques introduced here cannot be used to improve performance of passive components in all applications. These techniques, though, do provide major improvements in most filtering applications, an application in which parasitic components play an important role in the design.

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“…These insights are also relevant to other passive EMI cancellation techniques, such as those in [46][47][48][49].…”

Section: Discussionmentioning

confidence: 80%

Section: Parasitic Capacitance Cancellation In Filtersmentioning

confidence: 99%

Advanced Filters and Components for Power Applications

Neugebauer¹,

Pierquet²,

Perreault³

2006

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“…The traditional overlapped winding transformer shown in Fig. 3(a) requires the connection of an additional capacitor to the compensation winding [1,2], or adjustment of the compensation winding turn number [3], because C cs has a different value from C ps due to their different distances from the secondary winding. However, in the transformer for the LLC resonant converter, C cs can be set at almost the same value as C ps as long as the compensation winding has the same number of turns and the layer arrangement with the primary winding is as shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…A passive noise cancellation method has been proposed to reduce CM noise [1][2][3]. This method places a compensation winding in the transformer, thereby effectively reducing CM noise for buck, boost, buck-boost, and flyback converters.…”

Section: Introductionmentioning

confidence: 99%

Common Mode Noise Reduction for an LLC Resonant Converter by Using Passive Noise Cancellation

Ryu¹,

Kim²,

Jeong³

et al. 2015

Journal of electromagnetic engineering and science

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This paper describes the application of a passive noise cancellation method to a prototype inductor-inductor-capacitor (LLC) resonant converter by placing a compensation winding in a transformer to reduce common mode noise. The connection method for the compensation winding is investigated. A circuit analysis is implemented for the displacement currents between the primary and secondary windings in the transformer. The analyzed displacement currents are verified by performing a circuit simulation and a proper compensation winding connection that reduces common mode noise is found. The measurement results show that common mode noise is reduced effectively up to 20 dB in the 1 to 7 MHz frequency region for the prototype LLC resonant converter by using the proposed passive noise cancellation method. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/ by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. ⓒ

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“…Furthermore, the literature on CM chokes generally focuses on their use within passive or active filters and transformers that also eliminate the CM voltage [6], [13], [15]- [18]. Some accounts give special attention to topics related to the design of systems using CM chokes, such as the reduction of the occupied volume [19], [20] or the leakage capacitance of the choke [21] that reduces its effectiveness.…”

mentioning

confidence: 99%