- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
[IEEE 2019 IEEE 13th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG) - Sonderborg, Denmark (2019.4.23-2019.4.25)] 2019 IEEE 13th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG) - Active Class E Rectifier with Controlled Output Voltage for Megahertz Wireless Power Transfer
摘要： Wireless power transfer (WPT) is desirable for its elimination of direct electrical contact, i.e., safer charing solution, water-proof and dust-proof capability, sterile environment application, etc. However, the variable working conditions, such as the coupling coil relative position, can always lead to output voltage ?uctuations. Therefore, output voltage regulation is especially necessary for the charging of electronic terminals. This paper proposes an active Class E recti?er that can perform both high frequency recti?cation and output voltage regulation. The basic working principle of the active recti?er is explained and design guidance is provided. Both simulations and experiments are done to demonstrate the proposed design and desired performance. With the duty cycle control of the active recti?er, an constant output voltage can be maintained under a varying coupling coef?cients and ?nal DC load.
关键词： active Class E recti?er,output voltage regulation,duty cycle control,Wireless power transfer (WPT)
更新于2025-09-11 14:15:04
-
[IEEE 2018 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer (WoW) - Montréal, QC, Canada (2018.6.3-2018.6.7)] 2018 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer (Wow) - The Optimization of Auxiliary Detection Coil for Metal Object Detection in Wireless Power Transfer
摘要： For the safety of customers and WPT Electrical Vehicles (WPTEVs), Metal Object Detection (MOD) is a necessary module in the whole WPT system design. In this paper, auxiliary detection coil which utilizes the influence of metal objects on the detection voltage is used as the method to achieve the MOD and an equation which can optimize the design of MOD auxiliary detection coil is proposed. To optimize the detection coil, approximate quantitative description of voltage change in the detection coil is done by modeling the effect of a metal object. A comparison between the simulation and equation’s numerical analysis results is presented that verifies the use of proposed equation. The influence of the radius, turns and position of auxiliary detection coil on voltage variation are also analyzed. And at the end of the paper, the testing result is proposed to verify the feasibility of the optimization method of this auxiliary detection coil design.
关键词： metal object detection (MOD),wireless power transfer (WPT),auxiliary detection coil
更新于2025-09-11 14:15:04
-
[IEEE 2018 IEEE International Conference on System, Computation, Automation and Networking (ICSCAN) - Pondicherry, India (2018.7.6-2018.7.7)] 2018 IEEE International Conference on System, Computation, Automation and Networking (ICSCA) - Power Factor Correction in Z-Source Resonant Converter for Wireless Power Transfer Applications
摘要： In this paper the Z-source converter is introduced to power factor correction (PFC) applications. The concept is demonstrated through a wireless power transfer (WPT) system for electric vehicle battery charging, namely Z-source resonant converter (ZSRC). Due to the Z-source network (ZSN), the ZSRC inherently performs PFC and regulate the system output voltage simultaneously, without adding extra semiconductor devices and control circuitry to the conventional WPT system such as conventional PFC converters do. In other words, the ZSN can be categorized as a family of the single stage PFC converters. In addition, the ZSN is suitable for high power applications since it is immune to shoot-through states, which increases reliability and adds a boost feature to the system. The ZSRC-based WPT system operating principle is described and analyzed in this paper. Simulations, and experimental results based on a 1-kW prototype with 20-cm air gap between the system primary and secondary side are presented to validate the analysis, and demonstrate the effectiveness of the ZSN in the PFC of the WPT system.
关键词： Power factor correction (PFC),Wireless Power Transfer (WPT),Total Harmonic Distortion (THD),Z-source resonant converter (ZSRC),Series resonant converter (SRC)
更新于2025-09-10 09:29:36
-
[IEEE 2018 2nd International Conference on Biomedical Engineering (IBIOMED) - Bali, Indonesia (2018.7.24-2018.7.26)] 2018 2nd International Conference on Biomedical Engineering (IBIOMED) - Study of Midfield Wireless Power Transfer for Implantable Medical Devices
摘要： Mid-?eld wireless power transfer (MF-WPT) is a scheme developed for transcutaneous power transfer to micro-implants kept deep inside the body in GHz frequency. With deep seated implants, the possible locations available for application increases to almost the entire body. But, this advantage of applicability is severely limited as the power delivered to the micro implants by MF-WPT is very low -in the range of few 100W. Yet, the mid-?eld operations have higher ef?ciency in miniaturized weakly coupled coil implants compared to traditional near-?eld system. So, with improvement in certain aspects, MF-WPT is expected to play a vital role in biomedical ?eld. For the same reason this paper focuses on analyses of literature available in various aspects of MF-WPT, its challenges, drawbacks and future scope of the scheme in medical ?eld.
关键词： Mid?eld wireless power transfer,Wireless Power Transfer(WPT),Biomedical device
更新于2025-09-10 09:29:36
-
[IEEE 2018 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer (WoW) - Montréal, QC, Canada (2018.6.3-2018.6.7)] 2018 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer (Wow) - Modified Series-Series Compensation Topology for WPT Systems
摘要： Wireless Power Transfer Systems use a wide selection of different compensation topologies to enhance one or the other of their characteristics. Among the simplest topologies, the series-series compensation offers high efficiency in a wide range of transferred power but requires an effective control of the output voltage and of the supply current when used in applications where the load varies substantially in order to protect the system from overvoltage or overcurrent. This paper presents a modified series-series compensation topology that inherently implements this protection at the expenses of a small decrease of the transfer efficiency. At high loads, the modified series-series topology operates as the conventional one, but at low loads its behavior changes limiting the transmitting side current and the output voltage. A preliminary analysis of operations of the proposed topology is performed in the time domain, then it is completed in the phasor domain and, finally, the obtained results are checked against those obtained by simulation implemented in the PSIM environment.
关键词： Wireless Power Transfer (WPT),Series-Series compensation,Extreme operating condition
更新于2025-09-09 09:28:46
-
Uneven-to-Even Power Distribution for Maintaining High Efficiency of Dual-Linearly Polarized Rectenna
摘要： The RF-to-dc power conversion ef?ciency (PCE) of the conventional dual-linearly polarized (DLP) rectenna often suffers from uneven RF power received by two ports of the DLP antenna, which is caused by a tilt angle between the linearly polarized incidence and the two polarizations of the antenna. In this letter, a hybrid coupler is employed to redistribute the uneven power from the DLP antenna to two even power distributions for a successive modi?ed Greinacher charge pump (GCP). Thus, a high RF-to-dc PCE of the modi?ed GCP can be maintained. Both theoretical analysis and experiment validate the proposed power distribution scheme, which maintains a stable high PCE of a DLP rectenna irrespective of polarization tilt angle. The proposed scheme is, thus, suitable for high-ef?ciency wireless power transfer.
关键词： wireless power transfer (WPT),hybrid coupler,Dual-linearly polarized (DLP) rectenna
更新于2025-09-09 09:28:46
-
[IEEE 2018 IEEE International Conference on Computational Electromagnetics (ICCEM) - Chengdu, China (2018.3.26-2018.3.28)] 2018 IEEE International Conference on Computational Electromagnetics (ICCEM) - A High Efficiency Multi-Receiver Wireless Power Transfer System with Unanimous Power Reception at a Certain Angle
摘要： This paper presents a high efficiency magnetically coupled resonant wireless power transfer(MCR-WPT) system which can achieve uniform power distribution for five receivers that are at different positions and an angle with the horizontal plane. Both the receiver and transfer coils utilize a single coil structure. This paper analyzes the change of the coupling coefficient with the variation of angle of the non-axial receiver coil. In order to make the non-axial receiver gets the maximum power, it is necessary to adjust the coupling coefficient to the maximum by deflecting the receiver an angle. A prototype is fabricated and tested. The simulation and test results are in good agreement. The overall system efficiency reaches 89.16%, and the five receivers can receive almost the same power.
关键词： non-axial receiver,unanimous power reception,high efficiency,Multi-Receivers,wireless power transfer(WPT)
更新于2025-09-09 09:28:46
-
Load-Independent Wireless Power Transfer System for Multiple Loads Over a Long Distance
摘要： In this paper, a novel long-distance wireless power transfer (WPT) system using repeater coils is proposed to provide power supplies for the driver circuits in high voltage applications such as flexible alternative current transmission systems (FACTS). Different from most of the existing wireless repeater systems where the load is only connected to the last coil and the repeater coils function solely as power relays, in the proposed system, multiple loads are powered by the repeaters. The repeater coils transfer power not only to the subsequent coils but also to the loads connected to them. Dual coil design is proposed for the repeaters with which load-independent characteristics are obtained with a suitable design of coupling coefficients. As a result, the load power can be easily adjusted without affecting each other. Load current characteristics and system efficiency have been analyzed in detail. The power transfer capability of the proposed system is illustrated for different coil quality factors and coupling coefficients. An experimental setup with 10 loads has been built to validate the effectiveness of the proposed long-distance WPT system. The maximum reachable system efficiency is about 84%.
关键词： dual coil design,Wireless power transfer (WPT),constant load characteristics,current independent,long distance
更新于2025-09-04 15:30:14