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A Moving Field Inductive Power Transfer (MFIPT) system for wireless inductive power supply of electric vehicles on the road is described. To minimize losses only those primary coils located below the secondary coil of a vehicle are excited. The dynamics, the power balance of the MFIPT system, and the costs for the implementation of the system are discussed.
A hybrid energy source allows a designer to meet extraordinary application requirements without having to make any performance sacrifices [1]. Most available hybridisation techniques in the literature are applied to automobile applications, describing solutions to pulsed load profile characteristics [2]. This study involves an instant water heater having a load profile of 18kW to 25 kW for 30s to...
In order to make a quantitative analysis of the power loss in wireless power transfer system, a comprehensive analysis of all the losses of a magnetic resonant wireless power transfer system is presented in this paper. The skin effect, proximity effect and high frequency radiation is also taken into account in coils whose internal AC resistance and high frequency radiation resistance are presented...
It has long been a hot issue of the single-phase to ground fault identification technics for the distribution network with neutral un-grounded system (NUS), the neutral resonant grounded system (NES) and the neutral resistor grounded system (NRS). The fault detection and location could be very difficult since the faulted component in above scenarios is less pronounced, and meanwhile it becomes a less...
This paper describes the design and implementation of the Switching Network Unit (SNU) for the superconducting Central Solenoid coils of the international nuclear fusion experiment JT-60SA to be built in Naka, Japan. Fusion experiments require an overvoltage in the poloidal coils inducing an overvoltage in the plasma chamber in order to produce the plasma breakdown. In the modern fusion devices, as...
In this paper, a comparison between several induction loads operating in a One Switch - Zero Voltage Switching (1SW-ZVS) resonant converter is presented. The aim is to determine the optimal load for induction cooking systems from the point of view of maximizing the performance of a given active device (Si IGBT or SiC JFET) in this resonant topology.
In automotive applications, the Z-source inverter is a single stage inverter that provides the useful feature of boosting the DC-link voltage to a desired value independently of the battery voltage. The advantage of an adjustable DC-link voltage can be used as a degree of freedom for a loss minimized control of electric drives. However, the semiconductors experience high stress during boost operation...
In this paper, the optimisation possibilities of a quasi-resonant induction cooker are investigated. Simulations show that main losses of the induction cooker occur in the heating coil and the RC-IGBT (power switch). The performance of the coil can be improved mainly by minimising the coil resistance. The IGBT-optimisation is based on the reduction of tail current in soft switching mode. The tail...
This work proposes the use of inductive links in order to wirelessly power autonomous sensors. In order to increase the powering distance and the power efficiency, resonant tanks were considered. To drive the transmitting resonant network, a commercial class D amplifier was used. Working frequency was restricted to 150 kHz. Commercial magnetic-core coils were selected as they provide high coil values...
The performance and details of design are discussed for impulse Tesla transformers with various numbers of primaries. Possible ways of parameter optimization are suggested.
This paper describes design principles to design and develop a transcutaneous link for medical implants using inductively coupled coils. Parameters which optimize link efficiency have been discussed in the light of previous studies and a simple design methodology to find optimized parameters for Class E amplifier and inductive coils is outlined. Paper also describes design of an indigenously developed...
This paper presents an analysis of the effect of duty ratio on power loss and efficiency of the transcutaneous energy transmission system (TETS) with a class-E power amplifier. Conduction loss for each component of the TETS circuit is derived and the total efficiency of the TETS is expressed as functions of the duty ratio D . Three identical TETS at D = 0.25 , 0.5 and 0.75 are designed, constructed...
The undesirable phenomenon of the contact bounce causes severe erosion of the contacts and, as a consequence, their electrical life and reliability are greatly reduced. On the other hand, the bounce of the armature can provoke re-opening of the contacts, even when they have already closed. This paper deals with the elimination of the bounce in both, contacts and armature, of a commercial DC core contactor...
The arcing current signals during the breaking and making operation of switches are measured for monitoring the opening and closing process. A current transducer based on Rogowski coil is developed to detect the arcing current with a wide bandwidth of 3 Hz to 7.54 MHz. Experiments were performed with switching containing resistance, inductance, and capacitance load respectively. Under the opening...
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