Analysis and design considerations for EMI and losses of RCD snubber in flyback converter

Meng, Peipei; Wu, Xinke; Yang, Jianyou; Chen, Henglin; Qian, Zhaoming

doi:10.1109/apec.2010.5433604

Cited by 43 publications

(10 citation statements)

References 14 publications

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“…In most reviewed literature, however the FB MI circuit is rarely used above 200 W [8], [13], [38]- [41], mainly because it is difficult to design an efficient high power FB transformer [13]. The topology is further held back by high peak current stresses and voltage clamping requirements, [5] , [38]- [43]. These factors combine to necessitate interleaving for increasing FB MI power ratings.…”

Section: Overview Of Fb Mismentioning

confidence: 99%

An Isolated Single-Stage Single-Phase Micro-Inverter Topology with Integrated Magnetic Components

Umar-Lawal

Siu

2019

2019 IEEE Energy Conversion Congress and Exposition (ECCE)

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Solar panels have been steadily increasing in capacity and decreasing in cost over the past few years. Given this context, and other incentives designed to increase renewable energy penetration, residential solar adoption is becoming more economically attractive. The solar AC module stands out amongst alternative residential solar technologies, for better modularity, higher efficiency, and ease-of-use. The Micro-Inverter (MI) topology bundled with the AC module then becomes a key factor in the overall cost, safety, and capacity of the system. The Flyback (FB) MI topology is a popular choice, thanks to its low component count and enhanced safety, but as modern residential solar panels trend towards 400 W and up, non-interleaved FB MIs, typically rated around 200 W, must become interleaved. Conventional FB MI interleaving is High Frequency (HF) interleaving, which adds a potentially bulky magnetic device to the topology. This thesis proposes and tests the application of an alternate topology, called the Isolated Manitoba Inverter (ISOMBI). The ISOMBI uses integrated magnetic devices and Low Frequency (LF) interleaving, to match the power rating of HF-interleaved FB MIs, without the extra bulky component. ISOMBI operating principles and analyses are disclosed, and an experimental prototype is constructed to test its ability as a grid connected power generator. The results show near unity Power Factor (PF), acceptable DC current levels and promising Total Demand Distortion (TDD). Overall, these results indicate that the LF-interleaved ISOMBI can be considered as a viable alternative to the HF-interleaved FB MIs in AC modules.

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Section: Overview Of Fb Mismentioning

confidence: 99%

An Isolated Single-Stage Single-Phase Micro-Inverter Topology with Integrated Magnetic Components

Umar-Lawal

Siu

2019

2019 IEEE Energy Conversion Congress and Exposition (ECCE)

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“…The method to derive the expression of voltage and current of the primary winding during the oscillation period has been introduced in [6,7]. In this way, the current through primary winding i 0 and voltage of primary winding u 1 during the oscillation period can be expressed as (15) where…”

Section: Fig 5 Equivalent Circuit Of the Three-windings Transformermentioning

confidence: 99%

“…So far, studies on the oscillation effect in flyback converters mainly focus on oscillation in the primary winding which would deteriorate the converter's power rate. Several schemes have been proposed to suppress the oscillation after the main switch is turned off [6][7][8][9][10][11]. It has been found that the oscillation in primary winding was induced by leakage inductance, parasitic capacitance of switch, and some other factors.…”

Section: Introductionmentioning

confidence: 99%

Oscillation effect of auxiliary winding in primary side regulated flyback converter

Zhang

Qian

et al. 2016

IEEJ Transactions Elec Engng

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In the operation of a primary-side-regulated (PSR) flyback converter, oscillation of the auxiliary winding would degrade the system reliability, as this winding plays an important role. In previous works, the oscillation of the auxiliary winding was thought to be related to the oscillation of the primary winding when the switch is turned off. However, a comprehensive explanation has not been given for this phenomenon. Meanwhile, the oscillation of the auxiliary winding depends not only on the oscillation of the primary winding but also on the conducting size and the layer distribution. Based on a multi-winding model obtained from the physical dimensions, this paper derives a mathematical expression to calculate the relation, in the time domain, between the ringing of the auxiliary winding and primary winding. The analytical results would allow the magnetic windings to be analyzed and optimized because the oscillation of the auxiliary winding is expressed as a function of the winding geometry and position. Besides, the skin and proximity effects as well as the nonlinear core properties are considered in the multi-winding model. An application example is also included. Simulation and experimental results of a single-stage, 16-W PSR flyback converter are given to validate the proposed analysis.

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“…So, their contribution to the magnetic field is reduced too. This is the reason why we modeled only, the main differential loop, which is constituted by the switch, the snubbers and the transformer [12].…”

Section: Flyback Converter Descriptionmentioning

confidence: 99%

Determination of the Resonance Frequencies of the Magnetic Near-Field Radiated by a SMPS

Labarre

Costa²,

Ecrabey³

2011

PIER B

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In this paper, we analyze the behaviour of a switched mode power supply (SMPS) regarding the radiated magnetic nearfield through an initial understanding of the electrical working of the converter, particularly during switchings. We propose a method based on impedance analysis at each state of the converter in order to predict the resonances of currents and/or voltages in the SMPS at the origin of the magnetic radiated near-field.

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Analysis and design considerations for EMI and losses of RCD snubber in flyback converter

Cited by 43 publications

References 14 publications

An Isolated Single-Stage Single-Phase Micro-Inverter Topology with Integrated Magnetic Components

An Isolated Single-Stage Single-Phase Micro-Inverter Topology with Integrated Magnetic Components

Oscillation effect of auxiliary winding in primary side regulated flyback converter

Determination of the Resonance Frequencies of the Magnetic Near-Field Radiated by a SMPS

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