A New ICPT System with Harmonic of Inverse Injection for Achieving High-Quality Electric Power Transmission

Chenyang Xia,Cong Zhu,Yu-Xiang Peng,Zhi-Xun Ma 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.2

In order to reduce harmonic component of inductively coupled power transfer (ICPT) system, this work proposes a twochannel ICPT system based on the harmonic of inverse injection which detects the harmonic component of fundamental wave channel by controlling the harmonic of inverse injection from harmonic channel. First, based on the transfer admittance model, each harmonic component in the fundamental wave channel is analyzed to determine the size and ordinal number of harmonic which needs to be eliminated. Then, the principle block diagram of the system is given. Accordingly, the harmonic channel should possess good constant current and frequency-selecting property. The resonance compensation topology of the harmonic channel is determined by making the comparative analysis of frequency-selecting property of LCCL and LCL. Finally, conditions of the selected harmonic elimination can be derived by optimizing the whole system parameter. Experiment shows that when parameter optimization is achieved, the novel ICPT system can off set the selected harmonic of output current of high-frequency inverter in the fundamental wave channel, achieving high-quality electric power transmission.

Hopf Bifurcation Study of Inductively Coupled Power Transfer Systems Based on SS-type Compensation

Chenyang Xia,Ying Yang,Yuxiang Peng,Aiguo Patrick Hu 전력전자학회 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.3

In order to analyze the nonlinear phenomena of the bifurcation and chaos caused by the switching of nonlinear switching devices in inductively coupled power transfer (ICPT) systems, a Jacobian matrix model, based on discrete mapping numerical modeling, is established to judge the system stability of the periodic closed orbit and to study the nonlinear behavior of Hopf bifurcation in a system under full resonance. The general flow of the parameter design, based on the stability principle for ICPT systems, is proposed to avoid the chaos and bifurcation phenomena caused by unreasonable parameter selection. Firstly, based on the state equation of SS-type compensation, a three-dimensional bifurcation diagram with the coupling coefficient as the bifurcation parameter is established with a numerical simulation to observe the nonlinear phenomena in the system. Then Filippov’s method based on a Jacobian matrix model is adopted to deduce the boundary of stable operation and to judge the type of the bifurcation in the system. Then the general flow of the parameter design based on the stability principle for ICPT systems is proposed through the above analysis to realize stable operation under the conditions of weak coupling. Finally, an experimental platform is built to confirm the correctness of the numerical simulation and modeling.

Hopf Bifurcation Study of Inductively Coupled Power Transfer Systems Based on SS-type Compensation

Xia, Chenyang,Yang, Ying,Peng, Yuxiang,Hu, Aiguo Patrick The Korean Institute of Power Electronics 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.3

In order to analyze the nonlinear phenomena of the bifurcation and chaos caused by the switching of nonlinear switching devices in inductively coupled power transfer (ICPT) systems, a Jacobian matrix model, based on discrete mapping numerical modeling, is established to judge the system stability of the periodic closed orbit and to study the nonlinear behavior of Hopf bifurcation in a system under full resonance. The general flow of the parameter design, based on the stability principle for ICPT systems, is proposed to avoid the chaos and bifurcation phenomena caused by unreasonable parameter selection. Firstly, based on the state equation of SS-type compensation, a three-dimensional bifurcation diagram with the coupling coefficient as the bifurcation parameter is established with a numerical simulation to observe the nonlinear phenomena in the system. Then Filippov's method based on a Jacobian matrix model is adopted to deduce the boundary of stable operation and to judge the type of the bifurcation in the system. Then the general flow of the parameter design based on the stability principle for ICPT systems is proposed through the above analysis to realize stable operation under the conditions of weak coupling. Finally, an experimental platform is built to confirm the correctness of the numerical simulation and modeling.

Cross-Shaped Magnetic Coupling Structure for Electric Vehicle IPT Charging Systems

Siyuan Ren,Chenyang Xia,Limin Liu,Xiaojie Wu,Qiang Yu 전력전자학회 2018 JOURNAL OF POWER ELECTRONICS Vol.18 No.4

Inductive power transfer (IPT) technology allows for charging of electric vehicles with security, convenience and efficiency. However, the IPT system performance is mainly affected by the magnetic coupling structure which is largely determined by the coupling coefficient. In order to get this applied to electric vehicle charging systems, the power pads should be able to transmit stronger power and be able to better sustain various forms of deviations in terms of vertical, horizontal direction and center rotation. Thus, a novel cross-shaped magnetic coupling structure for IPT charging systems is proposed. Then an optimal cross-shaped magnetic coupling structure by 3-D finite-element analysis software is obtained. At marking locations with average parking capacity and no electronic device support, a prototype of a 720*720mm cross-shaped pad is made to transmit 5kW power at a 200mm air gap, providing a 1.54m2 full-power free charging zone. Finally, the leakage magnetic flux density is measured. It indicates that the proposed cross-shaped pad can meet the requirements of the International Commission on Non-Ionizing Radiation Protection (ICNIRP) according to the Australian Radiation Protection and Nuclear Safety Agency (ARPANSA).

Cross-Shaped Magnetic Coupling Structure for Electric Vehicle IPT Charging Systems

Ren, Siyuan,Xia, Chenyang,Liu, Limin,Wu, Xiaojie,Yu, Qiang The Korean Institute of Power Electronics 2018 JOURNAL OF POWER ELECTRONICS Vol.18 No.4

Inductive power transfer (IPT) technology allows for charging of electric vehicles with security, convenience and efficiency. However, the IPT system performance is mainly affected by the magnetic coupling structure which is largely determined by the coupling coefficient. In order to get this applied to electric vehicle charging systems, the power pads should be able to transmit stronger power and be able to better sustain various forms of deviations in terms of vertical, horizontal direction and center rotation. Thus, a novel cross-shaped magnetic coupling structure for IPT charging systems is proposed. Then an optimal cross-shaped magnetic coupling structure by 3-D finite-element analysis software is obtained. At marking locations with average parking capacity and no electronic device support, a prototype of a 720*720mm cross-shaped pad is made to transmit 5kW power at a 200mm air gap, providing a $1.54m^2$ full-power free charging zone. Finally, the leakage magnetic flux density is measured. It indicates that the proposed cross-shaped pad can meet the requirements of the International Commission on Non-Ionizing Radiation Protection (ICNIRP) according to the Australian Radiation Protection and Nuclear Safety Agency (ARPANSA).

Research on Synchronous Phase Shift Control Strategy of Bilateral Converter in Bidirectional Inductive Power Transfer System

Wang Songcen,Jiang Cheng,Lu Qiang,Xia Chenyang,Wei Nan 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.5

It is the key to realize the precise control of power transfer direction and energy to ensure the synchronous phase shift of the bilateral converters in bidirectional inductive power transfer (BD-IPT) system. In order to solve the problem that wireless communication is adopted in bidirectional inductive power transfer system, and the delay caused by the power oscillation aff ects power transfer. A method for synchronizing the control signals of the bilateral converters that track the extreme value of the output DC current is proposed in this paper, and dual phase-shift control is adopted to make the system effi cient when it operates in a wide output power range. First, the power and effi ciency characteristics of the BDIPT system are analyzed in the paper. Next, a method to track the extreme value of the output DC current is designed for synchronization. Then, in order to ensure that the system maintains high-effi ciency operation in a wide power range, a bilateral phase shift control is proposed. Finally, the validity of the scheme is verifi ed through simulation and experiment.