Investigation and Implementation of an Input-Series Auxiliary Power Supply Scheme for High-Input-Voltage Low-Power Applications

Tao, Meng; Song, Yilin; Wang, Zhongxian; Ben, Hongqi; Li, Chunyan

doi:10.1109/tpel.2017.2669211

Cited by 32 publications

(12 citation statements)

References 22 publications

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“…The working waveforms of the LLC DC-DC converter are shown in Figure 4, which is corresponding to the six working states. g 1,4 and g 2,3 are the driving signals of the S 1 , S 2 , S 3 , and S 4 . V ab is the voltage between point a and point b. i Lm and i Lr are the current of the L m and L r .…”

Section: Operation Principlementioning

confidence: 99%

Research on Digital Synchronous Rectification for a High-Efficiency DC-DC Converter in an Auxiliary Power Supply System of Magnetic Levitation

Zhao

2019

Energies

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In this paper, a new auxiliary power supply system of magnetic levitation based on the LLC DC-DC converter is proposed. The switches of the DC-DC converter are SiC MOSFET, which enables high frequency, high temperature, and high power density. For further improving the efficiency of the system and realizing the stability of the output voltage under different load conditions, the digital synchronous rectification (DSR) based on the phase shift control strategy is proposed. The prototype of the LLC DC-DC converter based on SiC MOSFET is implemented, which can realize zero voltage switching (ZVS) and zero current switching (ZCS). Then, the thermal image of DSR is presented, which proves that the power loss of SiC MOSFET with DSR is relatively low. Additionally, the system efficiency among the Si IGBT, SiC MOSFET, and SiC MOSFET with DSR is analyzed and the prototype demonstrates 98% peak efficiency. Finally, simulations, experiments, and data analysis prove the superiority of the proposed DSR strategy for the new auxiliary power supply system of magnetic levitation.

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Section: Operation Principlementioning

confidence: 99%

Research on Digital Synchronous Rectification for a High-Efficiency DC-DC Converter in an Auxiliary Power Supply System of Magnetic Levitation

Zhao

2019

Energies

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“…Feeding the APS from the HVAC will be required when the SST must form the LVAC grid. APSs with 2.2 kV input voltage are used in [21], [22]. APS with inductive power transfer are proposed in [23]- [24] for grid integration of a MV modular multilevel converter.…”

Section: A Apss Fed From Ac Portsmentioning

confidence: 99%

Energization and Start-Up of CHB-Based Modular Three-Stage Solid-State Transformers

Saeed

Cuartas

Rodríguez

et al. 2018

IEEE Trans. on Ind. Applicat.

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This paper discusses the energization and start-up process of modular three-stage Solid State Transformers (SSTs) based on a cascaded H-bridge (CHB) topology. A key element of the SST is the Auxiliary Power Supply (APS) feeding the auxiliary circuitry. Redundancy and simpler implementation can be achieved by powering the APSs from the cells DC-link capacitors, but at the expense of a more challenging start-up process of the SST. The first steps of this process must be performed before APSs are operative. This can result in undesired transient events (inrush currents, voltage sags in the capacitors voltages, etc.) which could prevent proper start-up of the SST or even jeopardize the power devices or other elements. A simple strategy for the energization and start-up of SSTs using this APSs structure is proposed. The method is valid both for grid-forming and grid-feeding operation of the SST, regardless of the energization port and without the addition of any extra circuitry. Simulation and experimental results are provided.

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“…The traction power supply system is one of the four core systems of a railway and the only source of train power [1]. In addition, the traction power supply system is also an important load of the three-phase power system [2,3]. Because the transformer production technology is mature and simple relatively, the railway mainly power supply is three-phase to single-phase.…”

Section: Introductionmentioning

confidence: 99%

“…3 = 125 switch states, which makes up the number of total voltage levels is 13. Each module is shown on an axis inFigure 4, a cube appears.…”

mentioning

confidence: 99%

Voltage-Balancing Strategy for Three-Level Neutral-Point-Clamped Cascade Converter under Sequence Smooth Modulation

Zhou

et al. 2020

Energies

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Three-level neutral-point clamped cascaded converters (3LNPC-CC) are widely used in high power nigh-voltage applications. This paper mainly discusses the open-circuit fault in DC-side of the 3LNPC-CC. Optimized by the sequence pulse modulation, a sequence smooth modulation (SSM) is proposed to keep the DC-side voltage balance while the 3LNPC-CC suffers open-circuit fault from DC-side. The SSM found efficient switch-state path through a 3-D cube model and simplified the path from thousands of switch state. The SSM avoids the complex calculation in the voltage-balancing modulation, while the dynamic character of it was less influenced. At the same time, the modulation changes the voltage level smoothly and balances the fault DC-side voltage effectively. The characters of the proposed modulation are verified by the simulation and the experiment.

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Investigation and Implementation of an Input-Series Auxiliary Power Supply Scheme for High-Input-Voltage Low-Power Applications

Cited by 32 publications

References 22 publications

Research on Digital Synchronous Rectification for a High-Efficiency DC-DC Converter in an Auxiliary Power Supply System of Magnetic Levitation

Research on Digital Synchronous Rectification for a High-Efficiency DC-DC Converter in an Auxiliary Power Supply System of Magnetic Levitation

Energization and Start-Up of CHB-Based Modular Three-Stage Solid-State Transformers

Voltage-Balancing Strategy for Three-Level Neutral-Point-Clamped Cascade Converter under Sequence Smooth Modulation

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