Shuxin Chen

Shuxin Chen

Nanyang Technological University

H-index: 14

Asia-Singapore

About Shuxin Chen

Shuxin Chen, With an exceptional h-index of 14 and a recent h-index of 14 (since 2020), a distinguished researcher at Nanyang Technological University, specializes in the field of WPT, IPT.

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

A Front-end Monitoring Method for Coupling Coefficient and Receiver Resonant Frequency in the SS-Compensated Wireless Power Transfer Systems with Unknown Receiver Parameters

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

A Primary-Side Monitoring Method for Coupling Coefficient and Receiver Resonant Frequency in SS-Compensated Wireless Charging Systems with Relay Coil

A#-shaped Auxiliary Coil Array for Location Detection in Inductive Power Transfer Systems

A quadrupole receiving coil with series connected diode rectifiers for interoperability of non-polarized and polarized transmitting coils

An Ultrafast Estimation Method for Coupling Coefficient and Receiver Resonant Frequency in Universal Wireless Power Transfer Systems

A Super-Resonant Frequency Control for Handshaking of an Inductive Power Transfer System with Adjacent Units

Conditional Pulse Density Modulation for Inductive Power Transfer Systems

Shuxin Chen Information

University

Nanyang Technological University

Position

___

Citations(all)

719

Citations(since 2020)

698

Cited By

108

hIndex(all)

14

hIndex(since 2020)

14

i10Index(all)

16

i10Index(since 2020)

16

Email

University Profile Page

Nanyang Technological University

Shuxin Chen Skills & Research Interests

WPT

IPT

Top articles of Shuxin Chen

A Front-end Monitoring Method for Coupling Coefficient and Receiver Resonant Frequency in the SS-Compensated Wireless Power Transfer Systems with Unknown Receiver Parameters

Authors

Junming Zeng,Shuxin Chen,Kerui Li,Shu Yuen Ron Hui

Journal

IEEE Transactions on Power Electronics

Published Date

2024/1/29

In this paper, a front-end monitoring method is proposed to estimate the coupling coefficient and receiver resonant frequency in the series-series (SS) compensated wireless power transfer (WPT) systems. The proposal requires no prior knowledge of the receiver circuit parameters, such as the self-inductance of the coil, compensated capacitor, load resistance, and resonant frequency. Hence, it is suitable for the development of universal wireless charging systems and is immune against parameter tolerances and aging effects. It uses a sensing coil, which is decoupled from the transmitter coil but coupled with the receiver coil, to detect the phase information of the current on the receiver side. Only one zero-crossing sensor is required to detect the voltage information in the sensing coil. Two frequency sweeping processes are included to find the frequency points where the ac output voltage is in phase or out of phase …

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 Primary-Side Monitoring Method for Coupling Coefficient and Receiver Resonant Frequency in SS-Compensated Wireless Charging Systems with Relay Coil

Authors

Junming Zeng,Shuxin Chen,Kerui Li,Shu Yuen Ron Hui

Published Date

2023/6/4

A primary-side monitoring approach is proposed to estimate the coupling coefficient and receiver resonant frequency in a series-series compensated wireless power transfer (WPT) system in which the coupling coefficient and receiver’s resonator parameters can be unknown. A relay coil, coupled with the receiver coil but decoupled from the transmitter coil, is designed to obtain the phase information of the receiver current. Two frequency sweeping processes are included to find the frequency points where the output voltage is in phase or out of phase with the input voltage. Only one zero-crossing detector is required in the process. A detailed analysis of the proposed approach is conducted. In the experiment, the estimation errors are less than 6% for the coupling coefficient and 1% for the receiver resonant frequency. Real-time implementation of the proposed method confirms that the estimation process is extremely …

A#-shaped Auxiliary Coil Array for Location Detection in Inductive Power Transfer Systems

Authors

Shuxin Chen,Yaohua Li,Junming Zeng,Kerui Li,Shu Yuen Ron Hui,Yi Tang

Published Date

2023/6/4

Inductive power transfer (IPT) has become popular in applications such as electric vehicles. However, the potential coil misalignment is one drawback of IPT system, which can cause power variations and efficiency reduction. In this article, the detection of the receiver coil location is realized with auxiliary coils. A #-shaped auxiliary coil array is formed by four helix coils. The helix coils can be decoupled from the transmitter coil, which reduces the interference and simplifies the design. In general, the design is advantageous for the simple implementation and low cost. Experimental results are provided to evaluate the basic concept of the proposed method.

A quadrupole receiving coil with series connected diode rectifiers for interoperability of non-polarized and polarized transmitting coils

Authors

Yiming Zhang,Zhiwei Shen,Chao Liu,Xingkui Mao,Yizhan Zhuang,Shuxin Chen,Yi Tang

Journal

IEEE Transactions on Power Electronics

Published Date

2023/4/4

Nonpolarized and polarized coils are utilized in an electric vehicles wireless charging system. These coils are decoupled from each other at the central position, leading to interoperability issues. This letter proposes a new decoupling method and a quadrupole receiving coil with series-connected diode rectifiers for interoperability purposes. Decoupling windings are added to achieve decoupling of the four receiving poles. The total mutual inductance between the transmitting coil and the quadrupole receiving coil is the summation of the absolute values of the mutual inductances between the transmitting coil and the four receiving poles. In this way, the proposed quadrupole coil can be tolerant with not only the nonpolarized transmitting coil, but also with the polarized transmitting coils along two perpendicular directions. The experimental results confirm that a large coupling and efficient power transfer can be …

An Ultrafast Estimation Method for Coupling Coefficient and Receiver Resonant Frequency in Universal Wireless Power Transfer Systems

Authors

Junming Zeng,Yun Yang,Kerui Li,Shuxin Chen,Shu Yuen Ron Hui

Journal

IEEE Transactions on Power Electronics

Published Date

2023/12/29

This paper proposes a fast and accurate front-end monitoring method to estimate the coupling coefficient and receiver resonant frequency of wireless power transfer (WPT) systems. The proposed method is developed for universal WPT systems with a series-compensated transmitter. The receiver parameters can be unknown and different from those on the transmitter side. This method is applicable to a range of receivers with first- or second-order compensation (i.e., series, parallel, and none-compensation). It can be extended to the systems with magnetic shielding, and has a strong immunity to the harmonics. Furthermore, a hardware-based identification approach is proposed for receiver compensation without any additional cost. The detection algorithms are analyzed in detail. The proposed scheme requires one additional phase detection sensor of the transmitter current. The zero-phase-angle frequencies of the …

A Super-Resonant Frequency Control for Handshaking of an Inductive Power Transfer System with Adjacent Units

Authors

Shuxin Chen,Junming Zeng,Yi Tang

Journal

IEEE Transactions on Industrial Electronics

Published Date

2023/2/13

In inductive power transfer (IPT) applications, where multiple IPT units can appear closely, the wrong pairing of one transmitter (Tx) unit and receiver (Rx) unit can happen and may cause damages. For example, for automated guided vehicle and electric vehicle applications, one IPT charger may find multiple nearby Rx units through radio frequency modules. If the charger wrongly pairs with an Rx unit in an adjacent lane, the charger will attempt to charge the correct Rx unit using the information from the adjacent Rx unit, which is a faulty operation. In this letter, IPT coils are used to transmit handshaking information, which inherently avoids adjacent Tx/Rx units. During handshaking, only small ac currents would occur even with a high dc input. When the Tx and Rx are far away, system currents remain small. Hence, the approach is a safe solution to assist pairing. The experimental results have been provided for …

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.

The Voltage Control and the Detuned Design for Handshaking of an Inductive Power Transfer System with Adjacent Units

Authors

Shuxin Chen,Yaohua Li,Junming Zeng,Yi Tang

Published Date

2023/9/4

For wireless charging systems, the pairing of radio frequency modules can fail when there are adjacent units. Coil-based pairing methods can address the issue but may experience high currents. This article introduces the voltage control and the detuned design for handshaking considering current suppression.

Reconfigurable rectifier-based detuned series-series compensated IPT system for anti-misalignment and efficiency improvement

Authors

Yang Chen,Shuangjiang He,Bin Yang,Shuxin Chen,Zhengyou He,Ruikun Mai

Journal

IEEE Transactions on Power Electronics

Published Date

2022/9/6

For an inductive power transfer (IPT) system, mobility is one of the most attractive features, but coupling variations can dramatically affect the system's output. In this article, a reconfigurable rectifier-based detuned series-series (SS) compensated IPT system is proposed to tolerate an extensive coupling range and improve the system efficiency simultaneously. The reconfigurable rectifier, which can operate in a full-bridge rectifier mode or a half-bridge rectifier mode, is used to alter the equivalent ac load from one value to the other so the expected coupling range of the detuned SS topology can be extended. At the same time, the system efficiency is also partly improved because the ac load is changed to get closer to the optimal load of the IPT system. First, a detuned SS IPT system with the reconfigurable rectifier is presented and followed by the analysis of the working modes. Then, a detailed parameter design …

A primary-side method for ultrafast determination of mutual coupling coefficient in milliseconds for wireless power transfer systems

Authors

Junming Zeng,Shuxin Chen,Yun Yang,Shu Yuen Ron Hui

Journal

IEEE Transactions on Power Electronics

Published Date

2022/7/5

This article presents a systematic frequency-sweeping based method for fast and accurate determination of mutual coupling coefficient in a series–series wireless power transfer system. The novel contributions involve a sensitivity analysis to evaluate the robustness of the proposed method and an evaluation of several adaptive frequency step functions to minimize detection time with an accuracy of less than 1% error. It is found that the proposed method is the most sensitive when the frequency is swept from the lower frequency boundary in a weakly-coupled system. Several adaptive frequency step functions are evaluated and compared. A power factor reference and an adaptive frequency step function are designed in a systematic way to achieve the dual purposes of minimum detection time and high accuracy. The experimental results obtained from the hardware setups show that the mutual coupling coefficients …

A Primary-Side Gain-Scheduled Controller Based on Dynamic Coupling Estimation for Inductive Battery Charging Systems with Sub-resonant Frequency Control

Authors

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

Published Date

2022/5/15

Inductive power transfer (IPT) systems in high-power transport applications are often required to operate under highly variable conditions, including a wide range of coupling and output power. For classical controllers, a fixed gain is selected to ensure the system stability in the full range of operation, which poses a challenge to the dynamic performance of the system with different working conditions. This paper presents a primary-side gain-scheduled controller for inductive battery charging systems with the sub-resonant frequency control to significantly improve the system dynamic response. The output power and dynamic coupling of IPT systems with the sub-resonant frequency control are estimated in real-time by using only the information on the primary side. The parameters of the gain-scheduled controller are then determined by the power reference value and estimated coupling, to ensure the rapid response …

Ensuring Soft Switching During Transient Operations of Wireless Power Transfer Systems with Frequency Control

Authors

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

Published Date

2022/10/17

The high switching frequency of wireless power transfer systems makes soft switching important due to switching losses. In the current literature, numerous solutions have been proposed for maintaining soft switching within the entire operating range. However, this study shows that variable frequency control can cause loss of zero voltage switching (ZVS) during system transients, even if soft switching during steady-state operation is ensured. The causes of this phenomena are analyzed thoroughly and two approaches to address such issue are discussed. Firstly, a limitation on the changing rate of the frequency can alleviate the issue. Secondly, phase advance control could also be possible, although this approach requires further studies. Results from both simulations and laboratory experiments are presented to verify the analysis and the control method proposed to avoid losing ZVS during transient conditions.

A Hysteresis ON-OFF Control Method of Inductive Power Transfer Systems with Low Output Ripples and Fast Transient Responses

Authors

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

Published Date

2022/10/17

This paper proposes a hysteresis ON-OFF control method for inductive power transfer (IPT) systems with low output ripples and fast transient responses. System power is regulated by skipping pulses, thus achieving zero voltage switching over the full operating range. Moreover, each switching state is determined by a hysteresis comparator operating on the measured power. This prevents the skipped pulses from exciting poorly damped oscillations. The dynamic behavior of IPT systems with the hysteresis ON-OFF control method is excellent because the controlled state of the system is directly adjusted in every half cycle. The effectiveness and feasibility of the proposed method are validated by simulations and experimental results from a small-scale laboratory prototype.

Reduced-Order Equivalent Circuit Model of Series Resonant Converter Considering the Interaction between Resonant Elements

Authors

Xin Li,Shuxin Chen,Yi Tang,Yiming Zhang,Xin Zhang

Published Date

2021/10/10

The high-order and complex small-signal equivalent circuit of the resonant converter prevents it from providing plentiful physical insights. This paper investigates the order reduction and approximation of the equivalent circuit of the series resonant converter (SRC). It is shown that there is a close interaction between the resonant inductor branch and the resonant capacitor branch that must be taken care of when conducting approximation. Using this methodology, a concise third-order equivalent circuit of the SRC is proposed. It corrects the phase deviation problem of the existing reduced-order model when the switching frequency is close to the resonant frequency, thus is more accurate in stability judgment and the closed-loop design. Finally, the simulation results verify the validity of the equivalent circuit.

Coil relative position transient issue in wireless power transfer systems

Authors

Xin Li,Yiming Zhang,Shuxin Chen,Xin Zhang,Yi Tang

Journal

IEEE Transactions on Industrial Electronics

Published Date

2021/4/7

In wireless power transfer (WPT) systems, the relative position between the transmitting and receiving coils could change suddenly, which is one of the most significant distinctions between wireless and wired power transfer systems. To the best of the authors’ knowledge, no theoretical analysis has been reported on the dynamic behavior of the WPT systems under the relative position transient (RPT). This article proposes the concept of “coupling-coefficient susceptibility” to describe this dynamic behavior. The extended describing function method is applied to extract the mathematical model of the coupling-coefficient susceptibility. Finally, an RPT testing platform, composed of a series-series compensated WPT system and a coil motion mechanism is designed and fabricated to verify the theoretical analysis. The experimental results exhibit a good agreement with the proposed model.

Pulsewidth-modulator-based transfer function measurement method for variable frequency-controlled half-and full-bridge converters

Authors

Xin Li,Yiming Zhang,Shuxin Chen,Xin Zhang,Yi Tang

Journal

IEEE Transactions on Power Electronics

Published Date

2021/2/23

Variable frequency control is widely used in half-bridge and full-bridge converters. Measuring the switching-frequency-to-output-voltage transfer function is critical to verify a derived model and guide the design of closed-loop parameters. The existing voltage-controlled-oscillator-based measurement method is complicated in circuit implementation and the accuracy could be affected by the bandwidth of the voltage-controlled current source. In this letter, a pulsewidth-modulator-based measurement method is proposed, which is much simpler in the circuit and more accurate. The principle of this method is analyzed in detail. Finally, the experimental results of a half-bridge and a full-bridge series-series compensated wireless power transfer systems are presented to verify the proposed method.

Current balancing of a multi-phase inverter for wireless power transfer systems based on mutually negatively coupled inductors

Authors

Yiming Zhang,Yuanchao Wu,Shuxin Chen,Xin Li,Yi Tang

Published Date

2021/10/10

In wireless charging applications, multiple phases of the inverter can be paralleled to enhance the power level. Even though the same pulse-width modulated signals are applied for the corresponding switches, there can still be phase differences in the driving pulses which directly turn on/off the switches, due to the inconsistency in the switch parameters or driving circuits. The different driving pulses can result in large circulating currents, which decrease the power level. Current balancing techniques can be adopted to solve this issue. This paper proposes a passive current balancing method for wireless charging. Compared with the existing method, the proposed method can reduce the number of coupled inductors by half and balance every two sources to achieve good current balancing performance. Experimental results have validated the effectiveness of the proposed method.

Inverter Phase Current Balancing for Wireless Power Transfer Systems Based on Parallel Resonant Networks

Authors

Yiming Zhang,Zhiwei Shen,Xin Li,Shuxin Chen,Yi Tang

Published Date

2021/10/10

To balance the phase output currents of a multiphase inverter in a wireless power transfer (WPT) system, negatively coupled inductors can be utilized to achieve a larger differential mode (DM) loop impedance than the common mode loop impedance. For a good current balancing effect, the inductances of the negatively coupled inductors should be large, leading to extra losses, cost ineffectiveness, and bulky size, which should be avoided in high-power applications. To solve these issues, this paper proposes a novel current balancing method based on parallel resonance. For a series-series compensated WPT system, part of the compensating capacitance is employed to form a parallel resonant network together with an extra inductor. The DM currents are suppressed by the large impedance of the parallel resonant network. Compared with the existing method, the inductances of the negatively coupled inductors …

Soft switching for strongly coupled wireless power transfer system with 90° dual-side phase shift

Authors

Yiming Zhang,Xin Li,Shuxin Chen,Yi Tang

Journal

IEEE Transactions on Industrial Electronics

Published Date

2021/2/2

To increase the power density of a wireless power transfer (WPT) system, the coupling of coils can be strong. However, in a strongly coupled series–series WPT system with a diode rectifier, currents can be distorted and discontinuous, and first harmonic approximation is no longer valid. The inverter is likely to work in hard switching, leading to extra noise, decreased efficiency, and a potential hazard for a safe operation. Through time-domain analysis, this article reveals that with a dual-side 90° phase shift, the hard switching of the inverter can be avoided, the power level can be enhanced, and the discontinuous conduction mode can be avoided to eliminate noises. The factors impacting the soft switching operations of the inverter and the rectifier are analyzed. To achieve 90° dual-side phase shift, the conventional approach of using the receiver voltage/current, which can be distorted and discontinuous in strongly …

See List of Professors in Shuxin Chen University(Nanyang Technological University)

Shuxin Chen FAQs

What is Shuxin Chen's h-index at Nanyang Technological University?

The h-index of Shuxin Chen has been 14 since 2020 and 14 in total.

What are Shuxin Chen's top articles?

The articles with the titles of

A Front-end Monitoring Method for Coupling Coefficient and Receiver Resonant Frequency in the SS-Compensated Wireless Power Transfer Systems with Unknown Receiver Parameters

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

A Primary-Side Monitoring Method for Coupling Coefficient and Receiver Resonant Frequency in SS-Compensated Wireless Charging Systems with Relay Coil

A#-shaped Auxiliary Coil Array for Location Detection in Inductive Power Transfer Systems

A quadrupole receiving coil with series connected diode rectifiers for interoperability of non-polarized and polarized transmitting coils

An Ultrafast Estimation Method for Coupling Coefficient and Receiver Resonant Frequency in Universal Wireless Power Transfer Systems

A Super-Resonant Frequency Control for Handshaking of an Inductive Power Transfer System with Adjacent Units

Conditional Pulse Density Modulation for Inductive Power Transfer Systems

...

are the top articles of Shuxin Chen at Nanyang Technological University.

What are Shuxin Chen's research interests?

The research interests of Shuxin Chen are: WPT, IPT

What is Shuxin Chen's total number of citations?

Shuxin Chen has 719 citations in total.

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