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This article describes the inductive power transfer system for unmanned aircraft vehicles (IPT4UAV) to charge lithium polymer battery. IPT4UAV is fed by a single-phase network. The structure of the system construction, control, air transformer design and the results of experimental research were presented.
Multi-output converters are widely used in various electronic devices and Electric Vehicles (EVs) due to their benefit in terms of cost, efficiency and space for installation. On the other hand, Wireless Power Transfer (WPT) methods including Inductive Power Transfer (IPT) and Capacitive Power Transfer (CPT) have been applied increasingly in EVs since they are more convenient and safe as compared...
This paper proposes a wireless power transfer system with Class E inverter and half-bridge Class DE rectifier. The proposed system consists of a Class E inverter, a half-bridge Class DE rectifier, and a loosely coupling transformer. Both the inverter and the rectifier achieve zero-voltage switching (ZVS) and zero-voltage derivative switching (ZVDS) at an optimum coupling coefficient. Therefore the...
The maximum efficiency point tracking (MEPT) control strategy has been adopted in state-of-the-art wireless power transfer (WPT) systems to meet power demand with the highest efficiency against coupling and load variations. Most of the MEPT implementations use dc/dc converters to regulate the output voltage and maximize the efficiency at the expense of increased system complexity. Other implementations...
Inductive power transfer (IPT) converters are resonant converters that optimize energy efficiencies at some loads. To achieve maximum efficiency, it is common to cascade the IPT converter with front-side and load-side dc-dc converters. The two dc-dc converters are normally controlled cooperatively in order to meet the requirements of output regulation and maximum efficiency tracking using a control...
Wireless power transfer (WPT), a revolution in energy transmission, commercializes in decade years and whose electromagnetic compatibility (EMC) also becomes an important issue at the same time. We investigated the conducted electromagnetic interference generated by series-series resonant WPT system using resonant magnetic field coupling with two-coil configurations in this paper by building the circuit...
This paper presents the dimensioning as well as the comparison of common compensation topologies for inductive power transfer (IPT) systems. A compensation is needed on the primary as well as the secondary side. It consists of a capacitor (parallel or series) in the simplest case or a combination of reactive components (like LCC). This work is the first compilation of the dimensioning, considering...
This paper deals with power semiconductor converter technology used for coupling the hydrogen-based technologies like electrolyzers and fuel cells with different types of the accumulators. The current control methods for two-phase buck-boost converter are further presented in this paper. The function of the coupling converter has been proven in both directions of current/power flow in the experimental...
With the electric vehicle drive system running electromagnetic compatibility problems become more and more serious, how to effectively suppress the conducted interference problem has become a technical problem. In this paper, the mechanism and the coupling path of conducted EMI in EV drive system are analyzed, and the suppression effect of electromagnetic interference is discussed from the aspect...
This paper examines the computational electromagnetics applied for the analysis and design of the inductive power transfer (IPT) system for stationary charging of electric vehicles (EVs). The focus is on the system main component, which is the pair of resonant magnetic coupled coils. The approach here is based on the development of a co-simulation environment capable to validate the experimental results,...
As the power demand for some railway applications rises up to the Megawatt level, the conventional Wireless Power Transfer (WPT) system can hardly meet the power requirements for rail vehicles due to capacity constraints of power electronic devices. In order to improve the power capacity of the WPT system, a novel dual transmitters and dual receivers based WPT system is proposed. The dual transmitters...
This paper presents the development of a hybrid Class-E synchronous rectifier for wireless powering of quad-copters through inductive power transfer. A synchronous rectifier relaxes the heatsink requirement for continuous operation as the transistor conduction losses will be lower than the diode conduction losses. This provides an advantage when the weight of the electronics is significant for the...
The transfer efficiency of WPT system is affected seriously by the AC internal resistance of power coils, the transverse offset and the separation distance between coils. Sometimes the user sets the tolerance of the relatively larger transverse offset as the primary aim, but they never give up high efficiency. This paper theoretically analyzes the effects of the ratio between AC internal resistance...
Wireless power transfer (WPT) technology has been considered as a promising power supply method for modern trams with electric double layer capacitors (EDLC). However, in real case, factors such as parking misalignments, load variations and coils inclination would result in a deviation of coils mutual inductance, which may adversely impact on system transmitting efficiency. Therefore, an approximately...
This paper presents the study and analysis of the LCC-C Wireless Power Transfer (WPT). The study aims to understand the characteristic and behavior of the proposed resonant compensation under various variables such as the load, frequency, and coupling coefficient. This study can be used as a consideration for the selection of the compensation network for a specific purpose of WPT. To verify the theoretical...
This paper introduces a new Wireless Power Transfer (WPT) system based on single pair of electric field coupling without a current return path. Such a single-contact Capacitive Power Transfer (CPT) system helps to enhance the coupling tolerance between the coupled plates. A class E converter is designed to drive an LCLC resonant circuit to boost the voltage at the primary side of the coupling plate,...
This research presents a wireless DC-to-DC power transfer over a short distance. Distance of remotely located target from the source coil and received voltage at the load are the major concern in the Wireless Power Transfer (WPT) applications. The inversely proportional behavior of these parameters degrades the system performance. In order to optimize these values and achieving transfer efficiency,...
This paper introduces long primary double sided linear induction motor (LIM) for special industrial applications. The LIM adopts modular structure and uses block feeding method. The significance is increasing efficiency, saving energy and reducing power capacity, the primary parallel connection with segment powered drive is adopted, which consist of long primary double sided LIMs. Each segment motor...
A segment control scheme of inductive power transfer (IPT) system for rail transit is proposed in this paper. In this scheme, the power supply range of primary coils along the track is segmented into several intervals and the several sets of pickups are installed aboard. When the vehicle runs, the switching frequency and the reference current of inverters is modulated with the position of the pickup...
This paper presents an investigation of an inverter fault tolerant direct torque control (DTC) of permanent magnet synchronous motor (PMSM) with loss of one leg. In case of faulty inverter, continuous operation is necessary and thus a breakdown of the PMSM drive is unacceptable. The basic idea of this work consists in analyzing performance of a three legs inverter and two legs inverter fed PMSM drive...
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