Yi Tang

Yi Tang

Nanyang Technological University

H-index: 56

Asia-Singapore

About Yi Tang

Yi Tang, With an exceptional h-index of 56 and a recent h-index of 49 (since 2020), a distinguished researcher at Nanyang Technological University, specializes in the field of Power electronics, power quality, renewable energy, micro grid.

His recent articles reflect a diverse array of research interests and contributions to the field:

Precise Parameterized Modeling of Coil Inductance in Wireless Power Transfer Systems

Nonlinear Inductor-Based Single Sensor Current Balancing Method for Interleaved DC-DC Converters

Current Balancing Control Method with Reduced Number of Current Sensors for Interleaved LLC Converters

Refining Power Converter Loss Evaluation: A Transfer Learning Approach

A Data-Driven Control Parameters Optimization Method for Dual Active Bridge Converters

Dynamic Improvement of Sub-Resonant Frequency Control for Inductive Power Transfer Systems by Coupling Estimation and Sending-Side Gain-Scheduled Control

A Hybrid Data-driven Power Loss Minimization Method of Dual Active Bridge Converters

Seamless Rotational Phase Shedding for Multiphase DC-DC Converters

Yi Tang Information

University

Nanyang Technological University

Position

___

Citations(all)

11177

Citations(since 2020)

8165

Cited By

6043

hIndex(all)

56

hIndex(since 2020)

49

i10Index(all)

154

i10Index(since 2020)

136

Email

University Profile Page

Nanyang Technological University

Yi Tang Skills & Research Interests

Power electronics

power quality

renewable energy

micro grid

Top articles of Yi Tang

Precise Parameterized Modeling of Coil Inductance in Wireless Power Transfer Systems

Authors

Yue Wu,Yongbin Jiang,Yaohua Li,Huan Yuan,Xiaohua Wang,Yi Tang

Journal

IEEE Transactions on Power Electronics

Published Date

2024/4/16

To expedite the laborious design and optimization of resonant coils in wireless power transfer systems, many traditional modeling methods are studied to calculate the coil inductances based on simplified coil structures. However, coil layouts are oversimplified in these studies, especially ignoring the corners of rectangular coils, thus leading to unavoidable low calculation accuracies. Aiming at these issues, precise parametric structure models are proposed for the circular and rectangular coils, which particularly model the corners of rectangular coils as elliptic arcs for the first time. Moreover, based on the parameterized coil structures, precise parametric inductance models are developed to achieve accurate and fast inductance calculations for coils with and without ferrite plates. Particularly, the complex mutual inductances between elliptic corners and other sections in rectangular coils are precisely analyzed and …

Nonlinear Inductor-Based Single Sensor Current Balancing Method for Interleaved DC-DC Converters

Authors

Zhigang Yao,Haogang Lan,Xinyu He,Fei Deng,Caisheng Wang,Shuai Lu,Yi Tang

Journal

IEEE Transactions on Power Electronics

Published Date

2024/1/17

The nonlinear characteristics of inductors, especially those with soft magnetic powder cores, are often perceived as undesirable and should be typically either avoided or mitigated. However, this letter presents an innovative method to take advantage of the nonlinear behavior of inductors in interleaved dc–dc converters. By analyzing the total current shape after interleaving, a novel single-sensor current balancing method is proposed, which is realized by using peak current sampling and exploiting the inductor's nonlinearity. The proposed method not only achieves low-cost current balancing with just one current sensor but also reduces the hardware volume and complexity of the converter. In addition, it also provides inspiration for various current balancing applications. Experimental validations for an interleaved dc–dc converter confirm the effectiveness of the proposed current balancing scheme.

Current Balancing Control Method with Reduced Number of Current Sensors for Interleaved LLC Converters

Authors

Gang Luo,Zhigang Yao,Linglong Jiang,Ziheng Xiao,Weirong Chen,Yi Tang

Journal

IEEE Journal of Emerging and Selected Topics in Power Electronics

Published Date

2024/4/15

The multiphase interleaved LLC converter has gained significant popularity in high-power isolation applications. However, due to parameter tolerances, it requires multiple current sensors to balance the currents in parallel channels, thereby increasing sensor cost and hardware complexity. In this paper, a current balancing method with reduced number of current sensors for an interleaved LLC converter is proposed to achieve cost-effective current balancing. By introducing an initial phase-shift angle into the traditional variable frequency phase shift control, the total rectifier output current of the interleaved LLC converter can be decoupled into two individual currents in all operating modes. The difference between the two individual currents is used to generate phase-shift angle compensation signals and then to implement the current balancing in parallel channels. As only one low ripple total current needs to be …

Refining Power Converter Loss Evaluation: A Transfer Learning Approach

Authors

Ziheng Xiao,Yu Jiang,Tengfei Sun,Yue Wu,Yi Tang

Journal

IEEE Transactions on Power Electronics

Published Date

2024/1/2

A precise evaluation of power converter losses is essential for accurately predicting power loss and optimizing control parameters to enhance efficiency across various scenarios and applications. Conventional power loss evaluation methods separate the theoretical analysis and experimental verification stages. Consequently, these methods often suffer from irreconcilable disparities between the analytical predictions and measurement outcomes. This article introduces a transfer learning (TL)-based refinement approach for power loss evaluation, which can be iteratively improved with ongoing experimental data. Our method entails the creation of an extensive source domain dataset for training a source domain model, followed by fine-tuning in the target domain. Consequently, a self-adaptive and refined power loss evaluation model is established with a small amount of experimental data. We conducted a case …

A Data-Driven Control Parameters Optimization Method for Dual Active Bridge Converters

Authors

Ziheng Xiao,Yu Jiang,Fei Deng,Zhigang Yao,Yi Tang

Journal

IEEE Transactions on Industrial Electronics

Published Date

2024/3/19

Conventional optimization approaches for dual active bridge converters (DAB) involve separate analysis and experimental verification stages, which may lead to suboptimal experiment results due to unaccounted parameters. This article presents a data-driven control parameters optimization method for DAB. The theoretical analysis and experimental verification of power loss serve as the source and target domains, respectively. By employing a large-scale set of simulation samples, we train an artificial neural network to evaluate power loss under various operating conditions. The insights gleaned from the pretrained source domain model are subsequently transferred to a target domain model (TDM) through transfer learning fine-tuning on a small scale of experiment samples. The TDM is utilized within a mathematical software to explore optimal control parameters, striking a balance between precision and …

Dynamic Improvement of Sub-Resonant Frequency Control for Inductive Power Transfer Systems by Coupling Estimation and Sending-Side Gain-Scheduled Control

Authors

Jiayu Zhou,Shuxin Chen,Giuseppe Guidi,Yi Tang,Jon Are Suul

Journal

IEEE Transactions on Industry Applications

Published Date

2024/1/2

This paper presents a sending-side gain-scheduled controller for improving the dynamic response of Inductive Power Transfer (IPT) systems with sub-resonant frequency control. The presented method is intended for inductive battery charging in high-power transport applications which are required to operate under highly variable conditions, including a wide range of coupling and output power. For such applications, the use of fixed controller gains selected to ensure the system stability in the full range of operation causes a slow response under low coupling or light load conditions. For implementing the gain-scheduling, the output power and coupling coefficient of IPT systems with the sub-resonant frequency control are estimated in real-time by using only sending-side information. The parameters of the gain-scheduled controller are then determined by the output power value and the estimated coupling, to …

A Hybrid Data-driven Power Loss Minimization Method of Dual Active Bridge Converters

Authors

Ziheng Xiao,Yu Jiang,Zhigang Yao,Zhou He,Yongbin Jiang,Yaohua Li,Yi Tang

Journal

IEEE Transactions on Power Electronics

Published Date

2024

Due to the intricate array of control parameters, achieving efficiency optimization for a typical dual active bridge (DAB) prototype becomes a laborious and time-intensive task. Traditional methodologies have revolved around an idealized lossless model of DAB, inevitably leading to a disparity between theoretical ideals and experimental realities. To surmount this challenge, we employ a hybrid data-driven model that seamlessly integrates insights derived from both simulation and experimentation. The disparity between the experimental and simulated models is represented as a residual branch, akin a nonlinear, dissipative impedance. This residual branch contributes to a fraction of power losses and subsequent output voltage/power reduction. The strategic minimization of residual branch emerges as a pivotal step in identifying the optimal control parameters. These optimal control parameters are then subjected to …

Seamless Rotational Phase Shedding for Multiphase DC-DC Converters

Authors

Ziheng Xiao,Zhigang Yao,Fei Deng,Lei Zhang,Yi Tang

Journal

IEEE Transactions on Power Electronics

Published Date

2024/1/29

This letter proposes a seamless rotational phase shedding (PS) operating method designed for multiphase DC-DC converters. Utilizing a 15-kW/50 kHz three-phase interleaved synchronous boost converter as an example, the optimal activation of phases is determined by minimizing power losses. Through a comprehensive analysis of total inductor current sag and swell in both steady-state and dynamic rotational PS operation, the optimal pulse width modulation (PWM) switching patterns are identified. Experimental results demonstrate that the proposed method outperforms traditional approaches, seamlessly achieving rotational PS while preserving interleaved among different activated phases.

Precise Modeling for the Inductance of Rounded Rectangular Coils in Wireless Power Transfer Systems

Authors

Yongbin Jiang,Yue Wu,Yaohua Li,Ziheng Xiao,Ning Wang,Min Wu,Xiaohua Wang,Yi Tang

Published Date

2023

This paper introduces a novel analytical model for the accurate inductance calculation of rounded rectangular coils in wireless power transfer systems (WPTSs). Comprehensive analysis is conducted for the rounded rectangular coil and a new parametric model is proposed to precisely define its structure. A new inductance calculation model is proposed for the rounded rectangular coils based on Neumann's formula and the obtained parametric structure model. The Geometric Mean Distance method is introduced to reduce the complexity and difficulty of self-inductance modeling. The image current method is adopted to achieve accurate inductance modeling for rounded rectangular coils with ferrite plates. Finally, the accuracy of the proposed analytical model is validated and compared with two other traditional methods. It turns out that the proposed models can achieve high calculation accuracy in self-inductance …

A Universal Coil Structure Design Method with Accurate Numerical Computation in Wireless Power Transfer Systems

Authors

Yue Wu,Yongbin Jiang,Yaohua Li,Zhou He,Chang Wang,Ziheng Xiao,Xiaohua Wang,Yi Tang

Published Date

2023/10/29

Conventional design and optimization methods for resonant coils in wireless power transfer systems (WPTSs) heavily rely on finite element simulations, which are very time-consuming and complex. In this paper, a novel Universal Coil Structure Design (UCSD) method is proposed to accelerate and optimize the design process of rounded rectangular coils in WPTSs. First, the analytical model of the resonant coil’s self-inductance is derived when no ferrite plate is added. Second, the image current method is adopted to calculate coil’s self-inductance when ferrite plates are added. Accurate numerical calculation methods are used for the derived analytical model to calculate the coil’s self-inductance quickly and precisely. Next, the working principle of the UCSD method is presented. The UCSD method can calculate the self-inductances of rectangular coils with the proposed analytical model and pinpoint the most …

Efficiency Improvement of DAB Converters with Enhanced Inductor Current Classification

Authors

Ziheng Xiao,Lei Zhang,Zhixing He,Yi Tang

Published Date

2023/10/29

The inductor current plays an important role in dual active bridge converters (DAB) because the ohmic loss and the switching loss are related to the global and detailed characteristics of the inductor current. For most of the previous articles, these two characteristics are analyzed separately, and the DAB efficiency is not be considered comprehensively. This paper gives the operation stage trajectory (OST) analysis based on the intrinsic characteristic of DAB with triple-phase shift modulation scheme (TPS). A novel inductor current classification method considering both the global and detailed characteristics is proposed. On this basis, a reduced non-active current modulation scheme is proposed with a small amount of non-active current while extending the ZVS operation region. The experimental results obtained from the laboratory prototype are given to validate the practical feasibility of the proposed modulation …

A Common-Mode Voltage Suppression Oriented Modulation Method for Modular Multilevel Converters

Authors

Boyu Chen,Shunfeng Yang,Rui Yang,Zhihan Zhang,Xingjiang Shen,Yi Tang,Peng Wang

Published Date

2023/1/29

Modular multilevel converter (MMC) has become the mainstream topology of flexible DC transmission and is widely used in many fields. But since MMC has lots of sub-modules (SMs), power electronic devices will generate high dv/dt and di/dt in the high-frequency switching process, and then generate serious common-mode interference through the parasitic capacitance to ground. By analyzing the traditional nearest level modulation (NLM), this paper proposes a modulation method that divides the area on the basis of the number of ON-state SMs, which is area-division nearest level modulation (ADNLM). Finally, the availability of the proposed method in suppressing the common-mode voltage is verified by comparing the output waveform and common-mode voltage waveform using different methods through simulation.

Computer-Aided Time Domain Operation and Design Optimization of Resonant Converters

Authors

Ziheng Xiao,Zongjian Li,Zhixing He,Hongliang Wang,Yi Tang,An Luo

Journal

IEEE Journal of Emerging and Selected Topics in Power Electronics

Published Date

2023/5/12

This article presents a method for computer-aided operation and design optimization of resonant converters using time-domain analysis. Resonant converters can operate in different operation stage trajectories (OSTs) with the change of two degrees of freedom (2DOFs), namely, switching frequency and duty ratio . This article calculates and analyzes the operation characteristics, zero-voltage switching-ON (ZVS-ON) region, and zero-current switching-OFF (ZCS-OFF) region when the 2DOFs vary by solving the OST differential equation sets. Based on this analysis, an algorithm is proposed to find the operation and design optimizations of a specific resonant converter while considering 2DOFs by traversing all possible control coordinates. This article provides several case studies to demonstrate the design tradeoffs in different scenarios, which are verified through experimental verifications.

Optimized Modulation Method for Three-Level Boost Converter With ZVS Under Unbalanced-Load Operation

Authors

Zhou He,Hongfa Ding,Ziqi Zhang,Zibo Chen,Zhigang Yao,Fei Deng,Yongbin Jiang,Yi Tang

Journal

IEEE Transactions on Power Electronics

Published Date

2023/8/11

Three-level boost (TLB) converters are a promising interface of bipolar dc microgrids. With different powers of the positive and negative dc buses, the conventional modulation method used in TLB converters fails to have zero-voltage switching (ZVS) for all switches, and the peak current is also high, leading to the risk of inductor saturation. In this article, an optimized modulation (OM) method is proposed to achieve ZVS for all switches even under unbalanced loads. The OM method features the same valley current at both the high and low output power sides, contributing to a wider ZVS range as well as a smaller peak-to-peak current. The modulation degree of freedom in TLB converters under unbalanced-load conditions is analyzed in detail for the first time, and the advantages of the proposed OM method are compared with its counterparts in terms of the ZVS range, the peak and valley current, and the efficiency …

A Zero-Knowledge ANN-Based Waveform and Critical Parameter Calculator for Resonant Converters

Authors

Ziheng Xiao,Yu Jiang,Yongbin Jiang,Yi Tang

Published Date

2023

Despite the widespread use of resonant converters in various applications, their analysis and design still necessitate a solid comprehension of the converter's operating principle and nonlinear behavior, which can be a significant manpower burden. To alleviate this issue and free us from repetitive work, this paper proposes a zero-knowledge artificial neural network (ZANN)-based waveform and critical parameter calculator for resonant converters. A normalized resonant network is employed to generate adequate data for training the ZANN. The ZANN can identify the essential characteristics of different resonant networks based on the configuration of hyperparameters. The accuracy of the calculator is verified using a 3-kW 480-V CLLC prototype. The results show that the accuracy of the root-mean-square (RMS) values is less than 5%, while the accuracy for the peak values is less than 20%.

Full-Range ZVS Control Method Based on Near-CRM for T-Type Three-Level Inverter

Authors

Zhigang Yao,Xinyu He,Ziheng Xiao,Zhou He,Yongbin Jiang,Yi Tang

Published Date

2023/10/29

T-type inverter is attractive due to low conduction losses and low switching voltage, and small size of passive component. Usually, zero-voltage switching (ZVS) without auxiliary circuit can be easily achieved by controlling the inverter to operate in the near critical conduction mode (near-CRM). However, with conventional modulation, T-type inverter require an extremely low switching frequency to achieve near-CRM mode when the AC voltage crosses zero, which is impractical for the digital controller. This paper proposes a new third-mode based modulation method and a variable switching frequency control method to make the T-type inverter into near-CRM. The proposed method is able to make all switches achieve ZVS soft-switching at full-range operation. The effectiveness and performance of the proposed modulation and control are validated by an experimental prototype.

Hybrid Modulation for Three-level Boost Converter with ZVS near Double Gain

Authors

Zhou He,Hongfa Ding,Ziqi Zhang,Zibo Chen,Zhigang Yao,Yongbin Jiang,Fei Deng,Yi Tang

Published Date

2023/10/29

Three-level boost (TLB) converters operating under triangular current mode (TCM) have the merits of zero-voltage switching (ZVS) and low EMI. However, owing to the zero ripple near double gain, the ZVS of three-level boost (TLB) converters is lost, leading to the hard switching. In this article, the hybrid modulation with ZVS at valley current near double gain is proposed based on the modulation degree of freedom in TLB. The ZVS is achieved by only changing the penetration of the two-level switching states while keeping the constant switching frequency, which has the small current ripple and low turn-on loss. Implementation of the hybrid modulation considering the voltage balance is presented. The effectiveness of the proposed method is validated through experiments.

Design And Simulation Of On-Board Hybrid Energy Storage Systems In Railway Vehicle

Authors

Zhihan Zhang,Shunfeng Yang,Rui Yang,Boyu Cheng,HaoBo Sun,NianZun Qi,Yi Tang,Peng Wang

Published Date

2023/4/14

In order to achieve high energy density and power density requirements of the on-board energy storage system, batteries and supercapacitors are combined into a hybrid energy storage system. This combination can allow the on-board hybrid energy storage system to inherit the advantages of battery and supercapacitor to improve the overall performance. A distributed energy storage topology is used to improve the reliability of the energy storage system. Based on the above objectives, this paper proposes a hybrid energy system design method, and verifies the effectiveness of the control in the simulation.

Review of fault diagnosis and fault-tolerant control methods of the modular multilevel converter under submodule failure

Authors

Qian Xiao,Yu Jin,Hongjie Jia,Yi Tang,Allan Fagner Cupertino,Yunfei Mu,Remus Teodorescu,Frede Blaabjerg,Josep Pou

Journal

IEEE Transactions on Power Electronics

Published Date

2023/6/6

Modular multilevel converters (MMCs) have attracted extensive research interests in various ac and dc conversion applications due to their modular structure and excellent harmonic performance. However, the large number of power switches increases the potential risk of submodule (SM) failure, which greatly challenges the safe and reliable operation of the MMC. This article presents a detailed review of fault diagnosis and fault-tolerant control methods of the MMC under SM failures. On this basis, comprehensive comparisons are conducted among different fault diagnosis methods, and verification results are provided to analyze the advantages and disadvantages of the popular fault-tolerant control methods. Finally, the review is concluded, and future trends and research opportunities are discussed.

Conditional Pulse Density Modulation for Inductive Power Transfer Systems

Authors

Jiayu Zhou,Giuseppe Guidi,Shuxin Chen,Yi Tang,Jon Are Suul

Journal

IEEE Transactions on Power Electronics

Published Date

2023/10/16

This letter proposes a conditional pulse density modulation (PDM) method for inductive power transfer (IPT) systems, which can automatically adapt the generated output patterns to effectively suppress current/power ripples. The proposed conditional PDM introduces a sending current limitation as an additional condition to skip pulses, which modifies the output patterns generated by conventional delta-sigma-based PDM. Thus, the PDM pulse pattern is continuously adapted to attenuate any excited current/power oscillations. The presented modulator is simple to implement and well-suited for IPT systems with poorly damped constant voltage load characteristics. Simulations and experiments demonstrate the effectiveness of the proposed modulation method.

See List of Professors in Yi Tang University(Nanyang Technological University)

Yi Tang FAQs

What is Yi Tang's h-index at Nanyang Technological University?

The h-index of Yi Tang has been 49 since 2020 and 56 in total.

What are Yi Tang's top articles?

The articles with the titles of

Precise Parameterized Modeling of Coil Inductance in Wireless Power Transfer Systems

Nonlinear Inductor-Based Single Sensor Current Balancing Method for Interleaved DC-DC Converters

Current Balancing Control Method with Reduced Number of Current Sensors for Interleaved LLC Converters

Refining Power Converter Loss Evaluation: A Transfer Learning Approach

A Data-Driven Control Parameters Optimization Method for Dual Active Bridge Converters

Dynamic Improvement of Sub-Resonant Frequency Control for Inductive Power Transfer Systems by Coupling Estimation and Sending-Side Gain-Scheduled Control

A Hybrid Data-driven Power Loss Minimization Method of Dual Active Bridge Converters

Seamless Rotational Phase Shedding for Multiphase DC-DC Converters

...

are the top articles of Yi Tang at Nanyang Technological University.

What are Yi Tang's research interests?

The research interests of Yi Tang are: Power electronics, power quality, renewable energy, micro grid

What is Yi Tang's total number of citations?

Yi Tang has 11,177 citations in total.

What are the co-authors of Yi Tang?

The co-authors of Yi Tang are Frede Blaabjerg.

    Co-Authors

    H-index: 197
    Frede Blaabjerg

    Frede Blaabjerg

    Aalborg Universitet

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