Reduction of switching regulator audiosusceptibility to zero

Otto, D.

doi:10.1049/el:19860301

Cited by 19 publications

(6 citation statements)

References 1 publication

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“…The stability of the EMI-filter-converter system has to be checked by applying the Nyquist stability criterion to the corresponding minor-loop gain, which usually consists of the filter output impedance (Z of ) and the closed-loop input impedance of the converter (Z in−c = 1/Y in−c ). In addition to the above-named control techniques, the high input-noise attenuation can be accomplished with certain conditions applying input-voltage feedforward (IVFF) [37,44,45]. In those cases, the minor-loop gain consists of the filter output impedance and the open-loop input impedance of the converter (i.e., Z in−o = 1/Y in−o ).…”

Section: Input Emi Filtermentioning

confidence: 99%

Interconnected Systems

Suntio

2009

Dynamic Profile of Switched‐Mode Converter

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The switched-mode converter is usually a subsystem within a system either in a single equipment or in a wider constellation known as a distributed power system [1-3] forming a dynamically complicated interconnected overall system, which is prone to instability and performance degradation. The use of distributed power architectures is continuously growing and would become gradually the most popular way of applying the converters [3]. The distributed systems can be found, for example, on electronic circuit boards [4,5], in space [6], and automotive [7] power applications, and so on. The stability and performance problems are actually general problems, which can also be encountered equally in the AC power systems [8,9] and are supposed to be increasing when more and more power electronic equipments are deployed into the AC grid systems.The switched-mode converters are a natural source of electromagnetic interference (EMI) due to its operating principles. Therefore, the converters are typically equipped with an input EMI filter to suppress the EMI noise to an acceptable level in order to comply with the stringent international EMI standards. The converter and the EMI filter form a complicated interconnected system, which may easily affect the stability and dynamic performance of the converter if not carefully designed [10][11][12]. Those effects are not very well understood [13][14][15]. Basically it is a question of the differences in the open-loop input admittance (Y in−o ), the ideal (Y in−∞ ) and short-circuit (Y in−sc ) input admittances, which dictate the way the converter would react on the source or EMI-filter interactions [16].The stability analysis of the interconnected systems [17][18][19][20] is typically based on the application of the methods developed for the EMI-filter analysis and design [10,11] as the impedance ratio consisting of the output impedance of the supplying subsystem and the input impedance of the load subsystem, which is commonly known as minor-loop gain according to [10]. It is shown in [21,22] that the question is actually on the internal stability of the interconnected system, in which the stability can be related to the minor-loop gain with Dynamic Profile of Switched-Mode Converter. Teuvo Suntio 

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Section: Input Emi Filtermentioning

confidence: 99%

Interconnected Systems

Suntio

2009

Dynamic Profile of Switched‐Mode Converter

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“…Audio susceptibility, which is defined as the input voltage to output voltage transfer function, is an important parameter of the DC-DC converter. When the audio susceptibility is equal to zero, the converter shows high attenuation of input-side noise so the propagation of the noise from supply side to load side can be eliminated [1,2]. In a cascaded system, if the audio susceptibility of the load converter is equal to zero, the control loop of the load converter will not be affected by the impedance interactions of the source and load converters [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…In a cascaded system, if the audio susceptibility of the load converter is equal to zero, the control loop of the load converter will not be affected by the impedance interactions of the source and load converters [3][4][5]. Therefore audio susceptibility has been focused in many literatures [1][2][3][4][5][6][7]. In this paper, A(s) is used to denote the audio susceptibility.…”

Section: Introductionmentioning

confidence: 99%

“…Reduction of audio susceptibility by feedforward control has been focused in many literatures, but most literatures focus on the basic second-order DC-DC converters [1,2,8,9] and there are few papers to discuss this issue about high-order converters because of their complex desired feedforward controllers. As many high-order converters can offer continuous input and output currents, which are suitable for the connection of solar arrays and batteries [10][11][12][13][14][15][16], high-order converters become more and more popular in the power system.…”

Section: Introductionmentioning

confidence: 99%

“…In [2] the idea about reduction of audio susceptibility A ( s ) to zero is proposed and a unified form of input‐voltage feedforward controller has been given. However, the feedforward controller may have right‐half‐plane (RHP) poles.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Research on input‐voltage feedforward control for high‐order converter topologies

Jia

Zheng

2014

IET Power Electronics

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The input-voltage feedforward control for the high-order converter is researched in this study. Input-voltage feedforward control can significantly reduce the audio susceptibility, that is, the input voltage to output voltage transfer function of DC-DC converter. The unified feedforward controller forms in different control modes have been derived. If the converter's model is a high-order model, its desired feedforward controller to eliminate audio susceptibility is complex. In this study, a decomposition block diagram for high-order controller is given so the complex controller can be realised by the composition of simple controllers. When the desired controller is impossible for realisation, its proportional form can be applied to the converter to decrease the audio susceptibility in the low-frequency range. The effective frequency range is related to the main circuit parameters of the converter. The conclusions have been verified by simulation and experiment results.

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Feedforward control of DC-DC PWM boost converter

Kazimierczuk

Massarini

1997

IEEE Trans. Circuits Syst. I

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Reduction of switching regulator audiosusceptibility to zero

Cited by 19 publications

References 1 publication

Interconnected Systems

Interconnected Systems

Research on input‐voltage feedforward control for high‐order converter topologies

Feedforward control of DC-DC PWM boost converter

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