Multiphase Inductive Power Transfer Box Based on a Rotating Magnetic Field

Raval, Pratik; Kacprzak, Dariusz; Hu, Aiguo Patrick

doi:10.1109/tie.2014.2334666

Cited by 28 publications

(4 citation statements)

References 24 publications

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“…In the optimisation loop, the partial impedances of the power channel and the signal channel are calculated, respectively, according to (2) and (7). The next step is calculating the voltage gains of the power and signal channels and the interference according to (4), (6) and (9). Finally, the values of the constraint functions can also be found out from (13)- (16).…”

Section: Optimal Design Process and Its Solutionmentioning

confidence: 99%

“…Wireless power transfer (WPT) was originally proposed at the end of the 19th century to transfer power utilising near-field magnetic or electric fields, and it has already attracted the broad attention of researchers in the world, recently [1][2][3][4]. As the development of technology continues on this area, WPT techniques have been extensively researched and applied in many fields such as consumer electronics [5], electrical motors [6,7], medical implants [8], [9], and transportation systems [10,11] owing to its advantages in flexibility, convenience, and safety.…”

Section: Introductionmentioning

confidence: 99%

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Parameter design method for capacitive power and signal transfer system based on multi‐objective optimisation algorithm

Zhou

Wang

et al. 2019

IET Power Electronics

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For most capacitive power transfer applications, a reliable signal transfer link between the primary side and the secondary side plays an essential role. The parameters design of the system has a key effect on the operating performance, however, the existing parameter design method can only get an acceptable solution, instead of a globally optimal solution. This study has proposed a general and global optimal parameter design method based on the constraint multi-objective algorithm. The mathematical models of the power and signal channels as long as the power noise is established and all the objective functions are given according to the models. Besides, the constraints considering the reasonable region of the parameter values and the limitation of the voltage and current on the elements are given. Then the multi-objective optimisation problem with the objective functions and constraints are solved by the non-dominated sorting genetic algorithm II, and the proper global optimal parameters are selected from the Pareto set. Finally, a simulation model and an experimental setup with 180 W power and 200 kbps signal transfer capability are constructed, and the results verified the effectiveness and correctness of this method.

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Section: Optimal Design Process and Its Solutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Parameter design method for capacitive power and signal transfer system based on multi‐objective optimisation algorithm

Zhou

Wang

et al. 2019

IET Power Electronics

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“…Wireless power transfer (WPT) technology that offers a way to transfer electric power through air or other another nonconductive medium has more advantages than traditional conductive charging technology [1][2][3]. In recent years, WPT technologies have been widely studied and many commercialized products have been released in low-power and highpower applications [4][5][6][7], such as consumer electronics [8][9][10][11], electrical machines [12][13][14], biomedical devices [15][16][17][18][19], and transportation systems [20][21][22][23][24][25]. Among the WPT technologies, inductive power transfer (IPT) and capacitive power transfer (CPT) are the two main types in which a magnetic field or an electric field is utilized for power transmission, respectively.…”

Section: Introductionmentioning

confidence: 99%

A General Parameter Optimization Method for a Capacitive Power Transfer System with an Asymmetrical Structure

Xia

Yuan

et al. 2022

Electronics

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Capacitive power transfer (CPT) is an attractive wireless power transfer (WPT) technology and it has been widely studied in many applications. Symmetrical structures and high-order compensation networks are always produced as optimization results and common configurations for high-efficiency CPT systems. However, in space-limited scenarios, an asymmetric structure tends to be a better choice. The related large number of high-order asymmetric system parameters is a key problem in parameter design. In this study, a general parameter design method that is based on reactive power optimization is proposed for an electric field resonance-based CPT system with an asymmetric six-plate coupler. The reactive power in the compensation network was analyzed and optimized under the constraint of transferred power. With equal reactive power, the optimization complexity was significantly reduced and the optimized system parameters were provided. To validate the effectiveness of the proposed method, a 1 MHz, 3.2 kW asymmetric CPT protype with 100 mm gap distance was implemented. The results indicate that, with the optimized parameters, high system efficiency can be achieved when the system’s volume is reduced. At the rated power, about 95% DC–DC overall efficiency was achieved through a 6-pF coupling capacitor.

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“…Mei et al [20] investigated a two-phase WPT system consisting of two orthogonal transmitter coils, which generated the rotational magnetic field by employing a phase-shift angle control method. Raval et al [21] proposed a 3D inductive power system driven by a multiple-phase power converter, which produced a rotating magnetic field by generating phase quadrature currents.…”

Section: Introductionmentioning

confidence: 99%

A 3D Wireless Charging Cylinder With Stable Rotating Magnetic Field for Multi-Load Application

et al. 2019

Self Cite

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This paper proposes a 3D wireless charging cylinder with improved compensation topology to generate a stable rotating magnetic field for charging multiple loads around it. The induced voltage of each receiver is kept constant against load variations when the distance between the transmitter and the receiver is fixed. The 3D charging cylinder has a simple configuration with two perpendicular LCL-compensated transmitter coils driven by separate power inverters sharing a common dc source. The system is fully analyzed with the maximum load limit determined, and design guidance is provided. Both theoretical and experimental results demonstrate that the transmitter currents remain constant against load variations when the total load is within the maximum load limit, and the transfer efficiency is increased with the increase of the total reflected impedance. Compared to the conventional series-series (SS) compensated WPT system, the proposed 3D configuration can maintain the transmitter currents to be constant within the maximum load limit so that multiple loads can be added without affecting each other. It has found that the transmitter currents of the proposed configuration are kept constant at their initial values when four loads with the resistance of 0.5 each are randomly placed at 21 cm from the center of the charging cylinder. By contrast, the transmitter currents of the SS compensated WPT system are obviously changed together with the load voltages. INDEX TERMS 3D wireless charging cylinder, constant induced voltage, maximum load limit, multi-load application, stable rotating magnetic field.

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Multiphase Inductive Power Transfer Box Based on a Rotating Magnetic Field

Cited by 28 publications

References 24 publications

Parameter design method for capacitive power and signal transfer system based on multi‐objective optimisation algorithm

Parameter design method for capacitive power and signal transfer system based on multi‐objective optimisation algorithm

A General Parameter Optimization Method for a Capacitive Power Transfer System with an Asymmetrical Structure

A 3D Wireless Charging Cylinder With Stable Rotating Magnetic Field for Multi-Load Application

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