The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this article, we propose a one‐dimensional positioning technique using hybrid inductively–capacitively coupled parallel line feeder, suitable for indoor industrial applications. The proposed system enables a tag to detect its own position by sensing the standing wave pattern along the elongated feeder. If the tag measures only the magnetic field via inductive coupling, the detectable range of this...
This paper formulates the maximum RF-to-RF efficiency of inductive power transfer system with two transmitters and two receivers under the assumption that cross-coupling exists between transmitters and between receivers. Maximum efficiency is derived by jointly optimizing the input and output currents. We express the maximum efficiency by a system kQ-product, which is determined by system Z-parameters...
This paper investigates reactance compensation method to eliminate the impact of cross-coupling in single frequency inductive power transfer (IPT) system with arbitrary number of receivers. Receiver-side resonance loses its optimality in multiple receiver scenarios under the existence of significant cross-coupling among receivers. Therefore, the resonant capacitances are added with compensatory reactances,...
It has been known that the dimensions of the primary coil of an inductive power transfer (IPT) system need to be smaller than approximately one-tenth of a wavelength to avoid impact of standing wave. Recently, an IPT system of concatenated parallel-line-feeder segments has been proposed to overcome this limitation. Numerical analysis in literatures has showed that the system is capable of providing...
This paper investigates maximum achievable efficiency of inductive power transfer (IPT) system with arbitrary number of receivers. We derive the formulas of optimal loads and maximum efficiency based on N-port network model. Via analysis and computer simulations, we show that the cross-coupling among receivers does not affect system efficiency if load resistances and reactances are jointly optimized...
This paper proposes inductive power transmission (IPT) system using multiple concatenated parallel-line-feeder (PLF) segments, which is suitable for dynamic charging of moving receivers. The system is HF-driven to exploit strong resonance and self-tuned PLF segments with short lengths are concatenated together to form an elongated primary coil while avoiding impact of standing wave.
This paper proposes a fast receiver-side load control method for high frequency wireless power transfer (WPT) using electromagnetically coupled parallel line feeder. In the WPT system, hybrid inductive-capacitive coupling and iterative receiver-side load control have been proposed to stabilize the received power against impact of standing wave. However, the iterative load control is time-consuming...
This paper proposes electromagnetic coupling for stabilizing the power transfer efficiency (PTE) of parallel line fed wireless power transfer (WPT). The conventional WPT system using magnetic coupled parallel line feeder suffers from PTE fluctuation due to magnetic field standing wave along the feeder line. Focusing on the fact that electric and magnetic fields are out of phase by 90 degrees, we propose...
This paper proposes a data transmission for parallel line fed wireless power transfer system. We focus on power receiver-to-source transmission link and employ the load modulation as a modulation scheme. To transmit data back to the power source from receiver, the power receiver periodically switches its load impedance to modulate the electric current, which can be observed at the source using envelope...
In parallel line fed wireless power transfer (WPT), power delivered to each receiver depends on load impedances and Z-parameters of all receivers in the feeding area. Centralized control for power distribution, which adjusts load impedances of all receivers according to their Z-parameters, is able to adjust the power distribution but suffers from a due to heavy control signaling. To reduce the control...
This paper is the first examination of the possibility of employing frequency division multiplexing (FDM) in power distribution for multiple receivers in parallel line fed wireless power transfer (WPT). At the source, power is divided into multiple flows and delivered to receivers by using multiple carrier frequencies. At each receiver, load impedance is adapted to system parameters at a predetermined...
This paper proposes a channel prediction scheme suitable for selfish dynamic spectrum control (Selfish DSC) in which each link dynamically chooses a necessary amount of spectrum having the highest signal to noise plus interference power ratio (SINR) from the entire shared band. For channel prediction in such a Selfish DSC, although it is mandatory to predict channel frequency response for the entire...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.