A Switched-Capacitor Interleaved Bidirectional Converter With Wide Voltage-Gain Range for Super Capacitors in EVs

Zhang, Yun; Zhang, Wei; Gao, Fei; Gao, Shenghan; Rogers, Dan

doi:10.1109/tpel.2019.2921585

Cited by 87 publications

(51 citation statements)

References 25 publications

(44 reference statements)

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“…In order to further illustrate the effectiveness of the optimal power distribution strategy proposed in this article, we also give the compared simulation results of other three commonly used control strategies such as rule-based logic threshold [5], fuzzy control [6], and dynamic programming (DP) [13]. e comparison results are shown in Figures 13 and 14.…”

Section: Cosimulation Between Advisor and Matlab/simulinkmentioning

confidence: 99%

“…Supercapacitor has the advantages of high power, long cycle life, and fast charging and discharging speed, but it has low energy density and weak energy storage capacity [5]. erefore, the composite power system composed of power battery and supercapacitor can not only meet the requirements of vehicle power performance but also recover braking energy, increase driving range, and improve energy efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Online Optimal Energy Distribution of Composite Power Vehicles Based on BP Neural Network Velocity Prediction

Jiang

Zhi-jun

2021

Mathematical Problems in Engineering

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In this paper, an online optimal energy distribution method is proposed for composite power vehicles using BP neural network velocity prediction. Firstly, the predicted vehicle speed in the future period is obtained via the output of a BP neural network, where the current vehicle driving state and elapsed vehicle speed information is used as the input. Then, according to the predicted vehicle speed, an energy management method based on model predictive control is proposed, and online real-time power distribution is carried out through rolling optimization and feedback correction. Cosimulation results under urban drive cycle show that the proposed method can effectively improve the energy efficiency of composite power sources compared with the commonly used method with the assumption of prior known driving conditions.

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Section: Cosimulation Between Advisor and Matlab/simulinkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Online Optimal Energy Distribution of Composite Power Vehicles Based on BP Neural Network Velocity Prediction

Jiang

Zhi-jun

2021

Mathematical Problems in Engineering

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“…The interleaved converters not only promise the low input current but also it offers higher conversion efficiency at higher output powers due to thermal losses distribution. There are many interleaved approaches that have been developed SI and SC VMCs to rectify this problem and achieve high step-up voltage gain [25][26][27][28][29]. The introduced converter in [25] utilizes active SI and SC to increase the voltage gain.…”

Section: Introductionmentioning

confidence: 99%

“…However, the input current is pulsating and the common source-load ground is lost which arises safety problems and passing of PV leakage current through the circuit. The two-phase [26,27] and three-phase [28,29] SC based interleaved converters achieve high voltage gain while maintaining the low input current ripple and common source-load ground.…”

Section: Introductionmentioning

confidence: 99%

An interleaved ZVS ultra‐large gain converter for sustainable energy systems applications

Bagherian

Nouri

Shaneh

et al. 2021

IET Power Electronics

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This paper proposes an interleaved zero-voltage switching (ZVS) ultra-large gain converter. By implementing coupled-inductor (CI) and built-in transformer (BIT) together with a switched capacitor (SC) voltage multiplier cell (VMC), a higher degree of flexibility is achieved for improvement of step-up voltage gain in comparison with those in which only one of these magnetic devices is utilised. Furthermore, the imposed voltage across the semiconductors is reduced by adjusting the turns ratio of the implemented CI and BIT. To further improve the efficiency, semiconductor devices with low ON-state resistance can be used. Moreover, to ensure ZVS turn-on, active clamp circuits are located in parallel with the main MOSFETs, which realize ZVS for all MOSFETs during an entire switching cycle. Minimizing the input current ripple as well as attenuating the reverse recovery problem of the diodes are the other advantages of this converter. Therefore, the proposed converter is a suitable candidate for those applications requiring high step-up gain and high conversion efficiency, such as renewable energy systems. To validate the performance of the proposed converter, a 600 W prototype with 22-380 V voltage conversion is designed, fabricated, and tested. Experimental results confirm that the proposed converter outperforms the previously presented ones in terms of the voltage gain and efficiency.

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“…Some kinds of ESSs are used in electrical systems, such as pumped hydro storage (PHS), battery energy storage (BES), supercapacitor energy storage (SES), superconducting magnetic energy storage (SMES), thermal energy storage (TES), and flywheel energy storage system (FESS) technologies. A FESS stores the motive energy in a high-speed rotating turntable connected to the machine shaft and releases the energy in the system when necessary [2], [3]. Hence, a FESS is a mechanical energy storage system.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Equivalent Magnetic Network Analysis of an Axial PM Bearingless Flywheel Machine

Zhu

et al. 2021

IEEE Access

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A nonlinear dynamic equivalent magnetic network model for an axial permanent magnet bearingless flywheel machine (APM-BFM) is proposed in this paper. The model focuses on analyzing the magnetic field changes at the air gap of the machine. According to the relative position of the stator and rotor, the magnetic circuit between the rotor and the suspension pole (the torque pole) is divided into 7 stages (8 stages), and dynamic equivalent magnetic network models are established. The local saturation coefficient is introduced to characterize the local magnetic saturation phenomenon of the rotor yoke during the rotation of the rotor. Using the proposed model and based on the obtained winding flux, the opposing electromotive forces and inductances of the suspension and torque windings of the APM-BFM are all analyzed and calculated. Finally, the validity of the proposed model is verified by finite element analysis (FEA).INDEX TERMS Bearingless flywheel machine, equivalent magnetic network, local saturation coefficient, finite element analysis.

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A Switched-Capacitor Interleaved Bidirectional Converter With Wide Voltage-Gain Range for Super Capacitors in EVs

Cited by 87 publications

References 25 publications

Online Optimal Energy Distribution of Composite Power Vehicles Based on BP Neural Network Velocity Prediction

Online Optimal Energy Distribution of Composite Power Vehicles Based on BP Neural Network Velocity Prediction

An interleaved ZVS ultra‐large gain converter for sustainable energy systems applications

Dynamic Equivalent Magnetic Network Analysis of an Axial PM Bearingless Flywheel Machine

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