Efficiency analysis of a high frequency PS-ZVS isolated unidirectional full-bridge DC-DC converter based on SiC MOSFETs

Awwad, Abdullah Eial; Badawi, Nasser; Dieckerhoff, Sibylle

doi:10.1109/epe.2016.7695601

Cited by 19 publications

(6 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To gain a full perspective, instantaneous values of i Lo at the beginning of the first four states (I Lo(I) , I Lo(II) , I Lo(III) , I Lo(IV) ) are also required. These can be calculated based on the design parameter n, instantaneous current values obtained in ( 23) and (25), and partial increments from ( 6) and (13).…”

Section: Derivation Results-output Voltage Expressionmentioning

confidence: 99%

“…Similar formulas later appeared in other works related to PSFB modeling [21][22][23]; however, the problem remains unsolved-if an engineer wants to accurately calculate the output voltage, closedform expressions are required-otherwise it is not feasible. There is a similar situation regarding the PSFB loss calculations, where it is common to provide general loss formulas without stating how the related rms and average semiconductor current values were calculated [24,25]. Recently, a thorough analytical investigation was presented [26] that outlined the relationship between the output voltage and the parasitic components of the PSFB, which cause certain second-order effects.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Closed-Form Formulas for Automated Design of SiC-Based Phase-Shifted Full Bridge Converters in Charger Applications

et al. 2021

View full text Add to dashboard Cite

Phase-Shifted Full Bridge (PSFB) topology in its four-diode variant is the choice with the lowest part count in applications that demand high power, high voltage, and galvanic isolation, such as in Electric Vehicle (EV) chargers. Even though the topology is prevalent in power electronics applications, no single, unified analytical model has been proposed for the design process of four-diode PSFB converters. As a result, engineers must rely on simulations and empirical results obtained from previously built converters when selecting components to properly match the DC source voltage level with the DC load voltage requirements. In this work, the authors provide a design-oriented analysis approach for obtaining the output voltage and semiconductor current values, ready for implementation in a spreadsheet- or MATLAB-type software to automate design optimization. The proposed formulas account for all the first-order nonlinear dependencies by considering the impact of each of the following eight design parameters: DC-link voltage, load resistance, phase-shift ratio, switching frequency, transformer turns ratio, magnetizing inductance, series inductance, and output inductance. The results are verified through experiments at the power level of 10 kW and the DC-link voltage level of 800 V by using a grid simulator and a SiC-based two-level Active Front End (AFE) with a DC–DC stage based on the PSFB topology. The accuracy of the output voltage formula is determined to be around 99.6% in experiments and 100.0% in simulations. Based on this exact model, an automated design procedure for high-power high-voltage SiC-based PSFB converters is developed. By providing the desired DC-link voltage, output voltage, output power, output current ripple factor, maximum temperatures, and semiconductor and heatsink databases, the algorithm calculates a set of feasible designs and points to the one with the lowest semiconductor losses, dimensions, or cost.

show abstract

Section: Derivation Results-output Voltage Expressionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Closed-Form Formulas for Automated Design of SiC-Based Phase-Shifted Full Bridge Converters in Charger Applications

et al. 2021

View full text Add to dashboard Cite

show abstract

“…A single active bridge (SAB) converter has been proposed, in which the secondary converter is replaced with a diode full-bridge rectifier circuit, and a smoothing capacitor is directly connected to the rectifier circuit. High-efficiency experimental results using SiC have been obtained [15]. A comparison of soft switching capabilities between SAB and DAB converters has been clarified [16].…”

Section: Introductionmentioning

confidence: 97%

Analysis and Output Power Control of Unidirectional Secondary-Resonant Single-Active-Half-Bridge DC-DC Converter

Tuan

Takeshita

2021

Energies

View full text Add to dashboard Cite

Development of high-frequency-isolated DC-DC converters is underway for charging and discharging electric vehicle batteries. As a charger, a Single Active Bridge (SAB) converter, which is composed of a primary full-bridge converter, a high-frequency transformer, and a secondary full-bridge diode rectifier circuit, has been proposed as a unidirectional high frequency isolated DC-DC converter. In this paper, as a simple circuit configuration, a Secondary-Resonant Single-Active-Half-Bridge (SR-SAHB) converter, in which the primary and secondary circuits of the SAB converter are both half-bridge circuits, and a resonant capacitor connected in parallel to each secondary diode, is created. Due to the partial resonance on the secondary side, power transmission with unity transformer turn ratio and unity voltage conversion ratio can be realized, and a high total input power factor of the transformer can be achieved. As a result, the maximum voltage and current of the switching devices and the transformer voltage can be reduced. Moreover, soft switching in all commutations can be realized. The operation waveform is analyzed, and output power control is derived using the variable frequency control method. The effectiveness of the proposed SR-SAHB has been verified by experimental results using a 2.4 kW 20 kHz, 265 V laboratory prototype.

show abstract

“…Since the starting current of an asynchronous motor (AM) is several times higher than its rated current [1][2][3][4][5][6], significant network voltage sags occur during start-up. Such voltage sags (VSs) affect electricity consumers connected to the network, which may have different levels of impedance to VSs and different qualities of electricity, and may also lead to an emergency situation and de-energizing of the system [7][8][9][10][11][12][13][14]. Exceeding the level of stability of the electric receiver against VSs generally leads to a violation of the conditions for its normal functioning or to failure.…”

Section: Introductionmentioning

confidence: 99%

Simulation-Based Analysis of Dynamics of Autonomous Electric Power Systems

Awwad¹,

Al-Soud²,

Al-Quteimat³

et al. 2022

MMEP

View full text Add to dashboard Cite

This paper is devoted to the development of a model of an autonomous electric power system to study random processes of voltage, current and power changes in emergency and dynamic operation modes. A diagram for calculating short-circuit currents has been presented, which was focused on a typical wide range of autonomous power plants with three diesel generator units. A model of an autonomous power plant has been developed, allowing to solve the assignments of determining short-circuit currents and starting currents of electric power machines. The equivalent network of the studied power system for transient calculations has been presented. Thus, the voltage waveforms have been obtained. A comparative assessment of theoretical calculation methods and simulation analysis demonstrated a high degree of accuracy of the simulation results. The use of approach suggested in the article and the developed model allows to increase the accuracy of conclusions when testing the abruptly variable processes and to make the most reasonable choice of measures to improve the quality of electricity and the reliability of electrical equipment. In particular, simulation analysis and obtaining transient curves for starting powerful consumers allow more accurately choose the type of circuit breakers used and the related configuration parameters.

show abstract

Efficiency analysis of a high frequency PS-ZVS isolated unidirectional full-bridge DC-DC converter based on SiC MOSFETs

Cited by 19 publications

References 11 publications

Closed-Form Formulas for Automated Design of SiC-Based Phase-Shifted Full Bridge Converters in Charger Applications

Closed-Form Formulas for Automated Design of SiC-Based Phase-Shifted Full Bridge Converters in Charger Applications

Analysis and Output Power Control of Unidirectional Secondary-Resonant Single-Active-Half-Bridge DC-DC Converter

Simulation-Based Analysis of Dynamics of Autonomous Electric Power Systems

Contact Info

Product

Resources

About