EMI-Regulated GaN-Based Switching Power Converter With Markov Continuous Random Spread-Spectrum Modulation and One-Cycle on-Time Rebalancing

Chen, Yingping; Brian, D.

doi:10.1109/jssc.2019.2931439

Cited by 13 publications

(4 citation statements)

References 19 publications

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“…This lays the foundation to remove or attenuate EMI from the critical frequency bands. Spreading noise energy to a broader frequency range instead of concentrating at the switching frequency and its harmonics can greatly reduce EMI in power converters [41,42].…”

Section: Spread-spectrum Modulation Techniquesmentioning

confidence: 99%

“…C-RSSM has a lower power consumption than D-RSSM in general because C-RSSM can be implemented in chips by using analogue methods to generate random signals. The random signals can be generated in several ways, such as a chaos signal generator [47,48], the avalanche noise of a Zener diode [39], or a Markov-chain-based random clock generator [42].…”

Section: 22mentioning

confidence: 99%

“…The additional output voltage ripple caused by RSSM technique can also be eliminated by a one‐cycle ON‐time rebalancing scheme proposed in ref. [42], which stabilises the duty‐ratio cycle by cycle. The scheme can also be applied in other RSSM implementations, which tends to increase control complexity.…”

Section: Emi Mitigation From Emi Sourcesmentioning

confidence: 99%

See 2 more Smart Citations

A review on recent effort of conductive EMI suppression methods in high‐frequency power converters

Xu³

et al. 2022

IET Power Electronics

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High‐frequency power converters with high switching frequency and compact layout are characterised by high power density and high efficiency, which is superior to conventional converters in many aspects. However, the management of electromagnetic interference (EMI) is a significant limitation for their widespread application. Recent conductive EMI suppression methods are reviewed in this paper. The mechanisms and characteristics of the reviewed methods are discussed in detail. Then, the EMI attenuation of the mentioned methods is compared from the perspective of attenuation band, attenuation amplitude, and cost respectively. It is demonstrated that both the source and the propagation path have a significant impact on EMI problems in performance of high‐frequency power converters. Several suggestions can be proposed based on the reviewed researches. Firstly, both the potential matching method and the balance winding method in transformer design can achieve a significant EMI reduction at all frequencies within the frequency range of conducted EMI. Secondly, spread‐spectrum modulation techniques are suggested to be applied in MHz converters instead of constant frequency control. Thirdly, the reviewed gate driver optimisation methods have a remarkable EMI suppression effect at high frequencies and still work for the suppression of radiated EMI. Finally, filters can have a reduced volume if the reviewed methods are applied.

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Section: Spread-spectrum Modulation Techniquesmentioning

confidence: 99%

Section: 22mentioning

confidence: 99%

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A review on recent effort of conductive EMI suppression methods in high‐frequency power converters

Xu³

et al. 2022

IET Power Electronics

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“…In the subject matter literature, some papers emphasize the necessity for assurance of reliable operation of complex energy systems and the need for EMC assurance [2][3][4][5][6][7][8]. Furthermore, some papers highlight how approaches concerning deterministic modulation (DetM) and random modulation (RanM), based on the parameters' control of fundamental switching frequency ( f sw ) and duty cycle (d), may contribute to achieving EMC requirements [9][10][11][12][13][14][15][16][17][18][19][20]. Indeed, the RanM has been widely used since the 1980s [21].…”

Section: Introductionmentioning

confidence: 99%

Aggregated Conducted Electromagnetic Interference Generated by DC/DC Converters with Deterministic and Random Modulation

et al. 2020

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The assessment of electromagnetic compatibility (EMC) is important for both technical and legal reasons. This manuscript addresses specific issues that should be taken into account for proper EMC assessment of energy systems that use power electronic interfaces. The standardized EMC measuring techniques have been used in a laboratory setup consisting in two identical DC/DC converters with deterministic and random modulations. Measuring difficulties caused by the low frequency envelopes, resulting from frequency beating accompanying aggregation of harmonic components of similar frequencies, were indicated as a phenomenon that might lead to significant problems during the EMC assessment using currently binding standards. The experimental results describing deterministic and random modulated converters might be useful for practitioners implementing power interfaces in microgrids and power systems as well as for researchers involved in EMC assurance of power systems consisting in multiple power electronic interfaces.

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Optimization Design of Distribution Transformers Maintenance Strategy Based on Markov Process

Gu¹,

Zhu²,

Zhu³

et al. 2020

2020 5th Asia Conference on Power and Electrical Engineering (ACPEE)

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EMI-Regulated GaN-Based Switching Power Converter With Markov Continuous Random Spread-Spectrum Modulation and One-Cycle on-Time Rebalancing

Cited by 13 publications

References 19 publications

A review on recent effort of conductive EMI suppression methods in high‐frequency power converters

A review on recent effort of conductive EMI suppression methods in high‐frequency power converters

Aggregated Conducted Electromagnetic Interference Generated by DC/DC Converters with Deterministic and Random Modulation

Optimization Design of Distribution Transformers Maintenance Strategy Based on Markov Process

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