Software-Based Wireless Power Transfer Platform for Various Power Control Experiments

Abstract

Abstract:In this paper, we present the design and evaluation of a software-based wireless power transfer platform that enables the development of a prototype involving various open-and closed-loop power control functions. Our platform is based on a loosely coupled planar wireless power transfer circuit that uses a class-E power amplifier. In conjunction with this circuit, we implement flexible control functions using a National Instruments Data Acquisition (NI DAQ) board and algorithms in the MATLAB/Simulink. To verify the effectiveness of our platform, we conduct two types of power-control experiments: a no-load or metal detection using open-loop power control, and an output voltage regulation for different receiver positions using closed-loop power control. The use of the MATLAB/Simulink software as a part of the planar wireless power transfer platform for power control experiments is shown to serve as a useful and inexpensive alternative to conventional hardware-based platforms.

Design Considerations for Wireless Charging Systems with an Analysis of Batteries

“…Other wireless power transfer methods, like the capacitively coupled power transfer, are not considered. The issues of concern include principle elaboration [7], impedance matching [8], frequency splitting [9], system architecture [10], circuit topology [11], coil optimization [12], magnetic structure design [13], dynamic online charging [14] as well as power control and efficiency analysis [15,16]. Recently, metamaterial has become a new hot spot in wireless power transfer systems [17,18], which acts as a "superlens" to increase the mutual inductance, and hence, the transfer efficiency.…”

Design and Control of a 3 kW Wireless Power Transfer System for Electric Vehicles

“…However, SCMR is not appropriate for automotive applications, as its operating frequency is very high, which goes beyond the limitation of SAE J2954 (work in progress). As another kind of wireless power transfer techniques, inductive power transfer (IPT) has developed for more than twenty years [5], and it mainly focuses on the high power level applications, where the issues of concern normally include power conversion and control [18,19], magnetic structure design [20], control algorithm and strategy [21,22] as well as circuit topology [23]. Basically, both SCMR and IPT conforms to Faraday's and Ampere's laws, and their differences primarily include the design approaches, system architectures, parameter selection and transfer characteristics [6,24].…”

“…The degree of approximation between the square wave shown in Figure 10 and a quasi-sinusoidal wave can be quantified by THD, and the lower the THD, the less the harmonic loss. The THD of the square wave consisted of different non-effective times can be calculated according to Equation (19), where Vn represents the different harmonic amplitudes: The transmitter and receiver in Figure 6 are high order resonant filters, which only allow the power signals at resonant frequency to pass through. Thus we should evaluate the fundamental components of the waves produced by the H Bridge.…”

“…The degree of approximation between the square wave shown in Figure 10 and a quasi-sinusoidal wave can be quantified by THD, and the lower the THD, the less the harmonic loss. The THD of the square wave consisted of different non-effective times can be calculated according to Equation (19), where V n represents the different harmonic amplitudes:…”

Electromagnetic Analysis of Different Geometry of Transmitting Coils for Wireless Power Transmission Applications

“…The transmitting coil, which is excited by means of an alternating current, generates an electromagnetic field which is dependent on dimensions of the coil, drive current and frequency [9]. There is an inductive coupling between transmitting and receiving coils [10]. Inductive wireless power transmission is dependent on different parameters such as air gap between the transmitter and receiver, frequency, and current excitation [11].…”