The model of inductive power system is set up,and how to choose the compensation topology and resonant frequency is analyzed.According to the analysis result,the model of inductive power system is set up,and the impact of the power transfer due to the variety of load is analyzed.

Design of loosely coupled inductive power transfer systems

With a consumer and / or energy storage device, from the or the mobile moving body 3 moving on or roadway or rail is stopped, apparatus for inducing transmitting electrical energy, the roadway 1 comprising a floor derivative 5 which is attached, this floor derivative with a number of first induction coil 4 connected to the arranged and power along the roadway 1 or rail, the first induction coil towards the mobile 3 It has a magnetic conductive iron core 6 to generate a magnetic field oriented in. Inductive wheel 8 attached to the movable body 3 is magnetically conductive core 10 and the second induction coil 9 fixed with a magnetically conductive wheel disc 11 facing towards the linked roadway 1 or rails on both sides of the core , and a 12. To ensure low reluctance loss between and induction coil 4, 9 for contacting the road 1, the magnetic conductivity of the tire 13 is attached to the wheel disc by an elastic which is rotated by the movement of the object 3, the tire flat in the pressed state, to reliably bridge the gap remaining between the roadway and wheel disc. This device is advantageously used in conjunction with an electric vehicle in order to comfortably and quickly recharge the battery during or in parked cars.

Apparatus for transmitting electrical energy

The transfer of energy with higher efficiency is the primary requirement in wireless power transfer systems. In this article, a single-sided flux-generated coupler structure suitable for loosely coupled wireless power transfer systems is introduced. Here, the achievable efficiency is decided by the coupling factor and mutual inductance between the transmitter and receiving coils. In this article, an auxiliary coil of a few turns is employed to enhance the mutual inductance with an improved coupling factor. The auxiliary coil is connected in series with the main coil in both the transmitter and receiver. The electrical and geometrical design considerations are brought out for the proposed auxiliary coil-assisted structure. Finite-element method (FEM) electromagnetic field simulations are carried out in the Ansys-Maxwell platform. The proposed auxiliary coil assisted coupler's efficacy is compared with the existing coil structures (circular, square, double DD) in terms of coupling factor, mutual inductance, and self-inductance through FEM simulations. With the proposed work, an improvement in flux density distribution toward the receiver together with higher mutual inductance and coupling factor is achieved. These improvements are verified through field simulations and experiment. Detailed design steps for the proposed coupler are given. For concept demonstration, a prototype WPT system with a power output close to 150 W is constructed. An input dc supply voltage is 48 V and the inverter is switching at 100 kHz. Enhanced features (improved mutual inductance profile together with the coefficient of coupling) of the proposed coupler are demonstrated through experimental measurements. The effect of different distances on power transfer and efficiency of the system is also measured. Measurement observations are in close agreement with analytical predictions.

Auxiliary Coil Based Square Coupler for Wireless Power Transfer System

The power transfer and efficiency in Wireless power transfer (WPT) system depends on coupling coefficient between coupled coils. Coil structure plays an important role in transferring power through magnetic coupling. This paper proposed a new coil structure for WPT systems. The 3D model of proposed coil structure has been developed in Ansys Maxwell and its performance in terms of coupling coefficient(k), Mutual inductance(M) and misalignment tolerance has been compared to existing coil structures (circular, square, double DD). The coupling coefficient and misalignment tolerance of proposed coil structure has been found to be higher than others with same size and same number of turns. Output power transfer and efficiency hasalso been plotted for different coil separation in PSIM simulations.

Auxiliary Coils Assisted Inductance Enhancement in the Wireless Power Transfer Schemes

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Auxiliary Coils Assisted Inductance Enhancement in the Wireless Power Transfer Schemes