Model for a Three-Phase Contactless Power Transfer System
ABSTRACT This paper studies the model for the three-phase contactless power transfer system. A phase winding in the three-phase contactless power transformer has the magnetic couplings with all of the other phase windings. Moreover, the magnetic couplings depend on the displacement of the secondary armature with respect to the primary armature. The equivalent model of the three-phase system with the complicated mutual inductances due to such magnetic couplings is presented. The model is transformed into the single-phase model that is similar to the model for the conventional system. The simplified model allows the easy consideration of the operation of the three-phase system. By using the model, the resonant capacitances for the three-phase system are available. The model is confirmed to successfully simulate the performance of the actual system. In addition, the experimental and theoretical results confirm that the three-phase system has the stable performance of the power transfer independently of the displacement of the secondary.
- SourceAvailable from: Hung-Yu Shen[Show abstract] [Hide abstract]
ABSTRACT: This research presents the development of a three-phase inductive coupled structure for contactless charging paddle system for electric vehicles. Several types of core shape are introduced and their magnetic circuits are simulated and analyzed. Therefore, a delta-type three-phase core structure is presented. The resonant frequency tracking control is realized in order to reduce the VA rating of primary three-phase half-bridge inverter and to achieve maximum power transfer capability to load. A prototype of the proposed contactless charging paddle system with aligned three-phase inductive coupled structure for electric vehicles is established in laboratory to confirm the functional operations and performances. Simulations and experimental results are demonstrated to show that the three-phase contact-less charging paddle system is more suitable for high power application due to the improvement of power flow smoothness between the exciting source and load.Industrial Electronics (ISIE), 2013 IEEE International Symposium on, Taipei, Taiwan; 05/2013
- [Show abstract] [Hide abstract]
ABSTRACT: This paper presents a comparison of position-independent contactless energy transfer systems by means of an inductive coupling, as a solution to overcome moving cables in emerging mechatronic applications with a linear moving load. A 2-D electromagnetic model of the contactless energy transfer system is derived and applied to six different topologies, which have either air-cored coils or a combination of salient or nonsalient magnetic cores. A parametric sweep is performed to obtain an optimal parameter set for each topology, suited for a power transfer of 1 kW with a position-independent mutual inductance between the primary and secondary coils. Comparison among the topologies shows that slotted topologies are less suited for a constant power transfer and that the geometry can be optimized for a mutual inductance variation below 3% along the linear movement.IEEE Transactions on Power Electronics 01/2013; 28(4):2059-2067. · 5.73 Impact Factor
- [Show abstract] [Hide abstract]
ABSTRACT: It is a key issue for inductively coupled power transfer system that the output power is regulated with high efficiency especially over a wide load range. In this paper, a novel harmonic-based phase-shifted control method is proposed. With this method, the harmonic component other than the fundamental component of the resonant inverter output voltage is employed to regulate the transferred power. The output power is controlled by changing the phase-shifted angle of the inverter. Different from the conventional approaches, the switching frequency in this method is much lower than the resonant frequency, meaning much reduced switching losses. The operation principle, switching strategy, and dead-time effect have all been presented. Experimental results demonstrate that the proposed power control method can achieve significant performance improvement at the light-load condition.IEEE Transactions on Power Electronics 01/2014; 29(2):594-602. · 5.73 Impact Factor