A Three-Level Converter With Reduced Filter Size Using Two Transformers and Flying Capacitors

Kim, Duk-You; Kim, Jae-Kuk; Moon, Gun-Woo

doi:10.1109/tpel.2012.2191798

Cited by 47 publications

(15 citation statements)

References 32 publications

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“…The reduction of the output inductance with TL secondary rectified voltage waveform has been discussed in [16][17][18][19]. According to these references, the required output inductance of the converters with TL secondary rectified voltage waveform is about one-third of that of conventional two-level converters.…”

Section: Reduced Filter Sizementioning

confidence: 99%

“…Second, three-level (TL) dc-dc converters (TLDCs) are suitable topologies for high voltage applications due to only half the input voltage stress on the primary switches [4]. The first diode-clamped TLDC was proposed in 1992 [4], and then, many other efforts have been made on this topic, e.g., novel topologies and corresponding control strategies [4][5][6][7][8][9][10][11], wide range soft switching solutions [12][13][14][15][16] and reduced filter size solutions [16][17][18][19]. Finally, modular multilevel dc-dc converters (MMDCs) can also be used in high voltage applications [20].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparative Evaluation of Wide-Range Soft-Switching PWM Full-Bridge Modular Multilevel DC–DC Converters

Chen

Dang

et al. 2020

Electronics

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This paper discusses some wide-range soft-switching full-bridge (FB) modular multilevel dc–dc converters (MMDCs), and a comparative evaluation of these FB MMDCs is also presented. The discussed topologies have all merits belonging to conventional FB MMDCs, e.g., smaller voltage stress on the primary switches, no added primary clamping devices and modular primary structure. In addition, the primary switches in each converter can obtain zero-voltage switching (ZVS) or zero-current switching (ZCS) in a wide load range. Two presented topologies are selected as examples to discuss in detail. The proposed FB MMDCs are assessed and evaluated based on performance, components and topology structure indices, such as soft switching characteristics, current stress, power loss distribution, number of added devices, complexity of structure and added cost. Experimental results are also included to verify the feasibility and advantages of the new topologies.

show abstract

Section: Reduced Filter Sizementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative Evaluation of Wide-Range Soft-Switching PWM Full-Bridge Modular Multilevel DC–DC Converters

Chen

Dang

et al. 2020

Electronics

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“…Moreover, high voltage dynamic transition would cause some electrical-magnetic compliable (EMC) problems, which is not preferred in the designing and producing procedure of the high input dc-dc power converters. Therefore, using series connected low voltage rating and high-performance power modules to sustain high dc bus voltage is still the papers have been published, and these solutions can be concluded into two kinds, which are TL dcdc converters [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] and input series cells dc-dc converters [20][21][22][23][24][25][26][27][28][29][30][31][32]. The first TL dc-dc converter was proposed in [5], which is a diode clamped half bridge (HB) dc-dc converter.…”

Section: Introductionmentioning

confidence: 99%

“…A series of zero-voltage and zero-current switching (ZVZCS) TL dcdc converters were proposed in [6], and the primary switches in this converter can achieve ZVZCS operation over wide load range; furthermore, a simple switching scheme is used in these converters, which makes these topologies more convenient to industrial customers. Then, many other good research results have been reported in following main aspects: new topologies for special applications [8][9][10], wide range soft switching technologies [6,[10][11][12][13][14][15][16], and converters with reduced volume of the input and output filters [16][17][18][19]. All above mentioned papers have made the TL dc-dc converters more applicable.…”

Section: Introductionmentioning

confidence: 99%

Wide Load Range ZVS Three-level DC-DC Converter: Modular Structure, Redundancy Ability, and Reduced Filters Size

Shi

2019

Energies

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In future dc distributed power systems, high performance high voltage dc-dc converters with redundancy ability are welcome. However, most existing high voltage dc-dc converters do not have redundancy ability. To solve this problem, a wide load range zero-voltage switching (ZVS) three-level (TL) dc-dc converter is proposed, which has some definitely good features. The primary switches have reduced voltage stress, which is only Vin/2. Moreover, no extra clamping component is needed, which results simple primary structure. Redundancy ability can be obtained by both primary and secondary sides, which means high system reliability. With proper designing of magnetizing inductance, all primary switches can obtain ZVS down to 0 output current, and in addition, the added conduction loss can be neglected. TL voltage waveform before the output inductor is obtained, which leads small volume of the output filter. Four secondary MOSFETs can be switched in zero-current switching (ZCS) condition over wide load range. Finally, both the primary and secondary power stages are modular architecture, which permits realizing any given system specifications by low voltage, standardized power modules. The operation principle, soft switching characteristics are presented in this paper, and the experimental results from a 1 kW prototype are also provided to validate the proposed converter.

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“…Levels of inverters are increased to reduce the harmonics. Some of them use greater number of switches to increase the level of the inverter [6], [7]. Contradicting this fact this inverter topology uses less number of switches and uses multicarrier sine waves as an interrupt.…”

Section: Introductionmentioning

confidence: 99%

Design and Simulation of Novel 11-level Inverter Scheme with Reduced Switches

Palanisamy¹,

Singh²,

Das³

et al. 2018

IJECE

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This work recommends the performance of coupled inductor based novel 11-level inverter with reduced number of switches. The inverter which engender the sinusoidal output voltage by the use of split inductor with minimised total harmonic distortion (THD). The voltage stress on each controlled switching devices, capacitor balancing and switching losses can be reduced. The proposed system which gives better controlled output current and improved output voltage with moderate THD value. The switching devices of the system are controlled by using multicarrier sinusoidal pulse width modulation algorithm by comparing the carrier signals with sinusoidal signal. The simulation and experimental results of the proposed 11-level inverter system outputs are established using matlab/Simulink and dsPIC microcontroller respectively.<br /><br />

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A Three-Level Converter With Reduced Filter Size Using Two Transformers and Flying Capacitors

Cited by 47 publications

References 32 publications

Comparative Evaluation of Wide-Range Soft-Switching PWM Full-Bridge Modular Multilevel DC–DC Converters

Comparative Evaluation of Wide-Range Soft-Switching PWM Full-Bridge Modular Multilevel DC–DC Converters

Wide Load Range ZVS Three-level DC-DC Converter: Modular Structure, Redundancy Ability, and Reduced Filters Size

Design and Simulation of Novel 11-level Inverter Scheme with Reduced Switches

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