- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE 2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC) - Shenzhen, China (2018.11.4-2018.11.7)] 2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC) - Parity-time-symmetric Wireless Power Transfer System Using Switch-mode Nonlinear Gain Element
摘要： Parity-time (PT) symmetry, a concept ranging from quantum field theories and mathematical physics to classical optics, is generalized to a wireless power transfer (WPT) system in [7]. However, the already introduced system is based on an operational amplifier, limiting the power transfer efficiency of the whole system. In this paper, the concept of PT symmetry is generalized to a switch-mode WPT system. PT symmetry is achieved with a nonlinear gain element which is a single-phase bridge inverter, achieving robust wireless power transfer scheme. It is shown in simulation that the system could adjust the frequency within tens of switching period, providing attractive way of dynamic charging. The analysis of the whole system is based on coupled mode theory (CMT).
关键词： averaged model,switch-mode,Parity-time symmetry,coupled modes,wireless power transfer
更新于2025-09-23 15:22:29
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[IEEE 2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC) - Shenzhen, China (2018.11.4-2018.11.7)] 2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC) - Analysis and Design of Class-E ZVS Inverter with Parallel Circuit for MHz Wireless Power Transfer
摘要： This paper presents a class-E zero-voltage-switching (ZVS) inverter for wireless power transfer (WPT) systems. The inverter is designed to achieve high efficiency and low electromagnetic interference (EMI) by operating at the resonant frequency of the load network. The experimental results show that the inverter can achieve an efficiency of over 90% with a power output of 100 W at a frequency of 1 MHz. The switch voltage is minimized to reduce stress and improve reliability. The proposed design is suitable for various WPT applications, including electric vehicle charging and consumer electronics.
关键词： class-e,inverter,wireless power transfer
更新于2025-09-23 15:22:29
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[IEEE 2018 IEEE International Conference on Electron Devices and Solid State Circuits (EDSSC) - Shenzhen (2018.6.6-2018.6.8)] 2018 IEEE International Conference on Electron Devices and Solid State Circuits (EDSSC) - Simplified reconfigurable rectifier with consistent input capacitance for wireless power transfer
摘要： A 1X/2X reconfigurable rectifier with compact structure and consistent input capacitance under different modes is presented for wireless power transfer in implantable medical devices (IMD). Compared to the conventional design consisting of five switches and three comparators (5S3C), the proposed rectifier merely needs one switch and four comparators (1S4C) and greatly reduces the design complexity. It makes the input capacitance keep consistent during mode transition, and thus does not require extra input capacitance compensation circuit. Additionally, the proposed design eliminates the simultaneous conduction problem during mode transition. Simulation results in a commercial 0.18 um CMOS technology verified the proposed design.
关键词： 1X/2X reconfigurable rectifier,wireless power transfer,consistent input capacitance
更新于2025-09-23 15:22:29
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[IEEE 2018 IEEE Asia Pacific Conference on Postgraduate Research in Microelectronics and Electronics (PrimeAsia) - Chengdu, China (2018.10.26-2018.10.30)] 2018 IEEE Asia Pacific Conference on Postgraduate Research in Microelectronics and Electronics (PrimeAsia) - Wireless Power Transfer for 3D Printed Unmanned Aerial Vehicle (UAV) Systems
摘要： Unmanned aerial vehicles (UAVs) have attracted a lot of attention for various applications such as service delivery, pollution mitigation, farming, and rescue operations over the past few years. However, the short duration of battery and the inconvenience of changing it is always a problem. Basically, small UAVs can only carry very limited payloads otherwise the battery will be drained more frequently. This project presents an automatic and high-efficient wireless power transfer (WPT) to supply a 3D printed UAV. A UAV has been 3D printed with wireless power transfer kit implemented to charge 3S 1500 mAh Li-Po battery with up to 1000 mAh automatically once it is landed, without manual operation. 24V DC is supplied to the transmitting side of WPT with the operating frequency at 180kHz and once the battery is fully charged, the charging process will also stop automatically.
关键词： Unmanned Aerial Vehicle (UAV),Wireless Power Transfer,3D Printing
更新于2025-09-23 15:22:29
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Wireless Information and Power Transfer (Theory and Practice) || Wireless Power Transfer
摘要： Large-scale wireless networks are characterized by the existence of multi-user interference due to the concurrent transmission of the network’s terminals. In conventional networks, i.e. networks where the main focus is information transfer, interference is a critical degrading factor of a terminal’s performance. On the other hand, in networks where the main focus is wireless power transfer (WPT), interference is beneficial as it increases the harvesting efficiency. However, in both cases all wireless links are influenced by path-loss effects due to the distances between the terminals. As such, the terminals’ deployment is another important element which affects their performance. Therefore, a reasonable approach is to study radio frequency (RF) energy harvesting in large-scale networks by taking into account spatial randomness. The modeling of the geometrical characteristics of large-scale networks can be achieved with the employment of stochastic geometry, a suitable mathematical tool for studying spatial point processes [1]. Specifically, this chapter presents three sections, each dealing with a different wireless-powered communication scenario: Section 15.1 focuses on a wireless-powered cooperative network where the relays harvest energy from the source in order to convey its transmitted information; Section 15.2 deals with a simultaneous wireless information and power transfer (SWIPT) scenario, where terminals employ successive interference cancellation (SIC) techniques to boost the harvesting efficiency; Section 15.3 studies a wireless-powered communication network (WPCN) implementing a wireless-powered opportunistic beamforming (OBF) protocol. In each section closed-form mathematical expressions are provided for the considered performance metric of each scenario as well as numerical results with useful insights regarding the network’s performance.
关键词： stochastic geometry,SWIPT,opportunistic beamforming,wireless power transfer,cooperative networks
更新于2025-09-23 15:22:29
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[IEEE 2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP) - Auckland (2018.8.5-2018.8.8)] 2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP) - Maximum efficiency analysis in wireless power transfer
摘要： The optimum design of loosely coupled transformer is the key technique in the wireless power transfer system (WPT). An improved magnetic model based on partial element equivalent circuit (PEEC) method is proposed in this paper. All parts of magnetic flux are divided into four categories: 1) flyback to topology; 2) resonant to topology; 3) quasi-resonant to topology; and 4) self-resonant to topology. As becomes clear from previous discussion, the converter topology used must be able to tolerate the minimum copper loss and minimum number of turns in given power transformer capability. In this method, the preferred parameters are coil shape and dimension, operating frequency, and coupling coefficient. The validity of the optimization algorithm is verified by experimental results.
关键词： reluctance model,parameter optimization,partial element equivalent circuit method,wireless power transfer,Prime-Mal
更新于2025-09-23 15:22:29
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[IEEE IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society - D.C., DC, USA (2018.10.21-2018.10.23)] IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society - Basic Study of Solar Battery Powered Wireless Power Transfer System with MPPT Mode and DC Bus Stabilization for Lunar Rover
摘要： Due to the extremely low temperature of Moon surface at lunar night, lunar rover has suffered from heat leakage along the wire connection between solar battery and rover body. In this paper, a wireless power transfer system has been proposed to transfer energy from solar battery to rover body in order to aovid the heat leakage at lunar night. The solar battery is controlled by a buck converter to be switched between the Maximum Power Point Tracking (MPPT) mode and buck mode to output appropriate amount energy to load and battery in rover body through the wireless power transfer system. The load and battery is connected to the DC bus which is controlled by a DC-DC converter to stabilize the voltage. Based on the experiment results, the whole system ef?ciency is about 48.7% at 22 W. It has been demonstrated the system ef?ciency is closely related with system power level due to the power electronics wasted power, and the ef?ciency can be improved to 62.1% with higher system power at 48.6 W.
关键词： DC-DC converter,Lunar rover,heat leakage,wireless power transfer
更新于2025-09-23 15:22:29
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A Dual-Mode RF Power Harvesting System With an On-Chip Coil in 180-nm SOI CMOS for Millimeter-Sized Biomedical Implants
摘要： In this paper, we present a dual-mode power harvesting system for millimeter-sized biomedical implants that are immune to the variation of wireless link parameters and loading. The design includes a multistage full-wave voltage rectifier, a power management unit, and a low dropout voltage regulator. Depending on the received RF power level and the required power by the load, power delivery is conducted in a continuous or duty-cycled mode. The system is fabricated in 180-nm silicon on insulator (SOI) CMOS technology with an active area of 2.56 mm2 including an on-chip coil. RF power is transferred to the chip from a 2 × 2 cm2 coil through 10 mm of air at 434 MHz. The efficiency of the designed wireless link, which is the power transfer efficiency from the external coil to the on-chip coil, reaches up to 0.68% (?21.7 dB) at 10-mm separation through air. Keeping the transmitted RF power below 24 dBm, the system can provide a 1.08-V dc voltage for resistive loads larger than 20 kΩ continuously over time. When the harvested power is not enough to drive the load continuously, the system operates in the duty-cycled mode. Measurement results show that the system can drive a 1-kΩ load in the duty-cycled mode when the transmitted power level is 15 dBm.
关键词： voltage rectifier,millimeter-sized implant,power management,on-chip coil,CMOS,rectenna,low dropout (LDO) regulator,wireless power transfer (WPT)
更新于2025-09-23 15:21:21
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[IEEE 2018 IEEE International Conference on Intelligence and Safety for Robotics (ISR) - Shenyang, China (2018.8.24-2018.8.27)] 2018 IEEE International Conference on Intelligence and Safety for Robotics (ISR) - Experimental study on operator-based integral sliding mode robust nonlinear control for WPT systems
摘要： In our previous research on wireless power transfer systems, an operator-based sliding mode control design was proposed to regulate the output voltage. However, the steady-state error exists in the nonlinear control system. In this paper, an operator-based integral sliding mode robust nonlinear control design scheme is proposed to eliminate the steady-state error in the wireless power transfer system. Besides, the robust stability is guaranteed by using robust right coprime factorization approach. Results of simulations and experiments are presented to prove the effectiveness of the proposed control design scheme.
关键词： operator-based control,robust nonlinear control,steady-state error,sliding mode control,wireless power transfer
更新于2025-09-23 15:21:21
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[IEEE 2018 International Power Electronics Conference (IPEC-Niigata 2018 –ECCE Asia) - Niigata, Japan (2018.5.20-2018.5.24)] 2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia) - Driving Test Evaluation of Sensorless Vehicle Detection Method for In-motion Wireless Power Transfer
摘要： In-motion wireless power transfer (WPT) has the capability to drastically increase a cruising distance of electric vehicles (EVs). A vehicle detection technique is important for a road facility to reduce standby power consumption and to prevent an unnecessary magnetic ?eld leakage. A sensorless vehicle detection method using voltage pulses has been proposed and fundamental experiments have been demonstrated with small-scale equipment. In this paper, a full-scale in-motion WPT system is implemented and a test vehicle is developed with the second generation wireless in-wheel motor (W-IWM2). The sensorless vehicle detection method is applied to the implemented in-motion WPT system and the feasibility of the proposed system is veri?ed by the driving experiment with the test vehicle.
关键词： In-motion charging,Electric vehicle,Sensorless vehicle detection,Wireless power transfer
更新于2025-09-23 15:21:21