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The armature of the electromagnetic reconnection launcher (EMRCL) plays a key role in accelerating large-mass loads, which have attracted extensive attention in past years. In this article, the effects of the armature thickness, length, and width on the performance of the EMRCL are analyzed for designing a high-strength and high-efficiency armature. First, according to the deformation and Von Mises’ stress distribution of the armature in the electromagnetic structure field, the armature thickness should be six times the skin depth. Then, the orthogonal experiment method results demonstrate that the armature speed tends to a saturated value with increasing length and width. Finally, a three-stage EMRCL platform with a load of 10 kg was constructed to verify the accuracy of the simulation results of three armatures with different lengths and widths. The experimental results show that the speed of 80 $\times120$ mm2 armature can reach 11.26 m/s, which is a significant increase of 23 times than the 40 $\times120$ mm2 armature and is consistent with the simulation results. It indicates that the optimal armature length is 1.2 times the coil length, and the optimal width is 1.3 times the coil width. This research provides a valuable reference for the armature design of EMRCL. [ABSTRACT FROM AUTHOR]

In this article, a design of bipolar nonsalient pole (BNSP) transmitter, which originates from motor theory, for high-power EV dynamic wireless power transfer (DWPT) system is proposed. To analyze and evaluate BNSP transmitter in aspect of principle, characteristic, and performance, the existing I-type, S-type, and N-type transmitters in DWPT application are classified as bipolar salient pole (BSP) transmitter, which establishes a reference for comparing. The design parameters and other contrast conditions of BNSP and BSP transmitters are given. Coupling flux and leakage flux of BNSP transmitter are analyzed by comparing the magnetic models and the finite-element models of BNSP and BSP transmitters. Based on the modular design in practical application, the sensitivity of coupling performance to the module gap in BNSP and BSP transmitters is analyzed and compared in simulation. All theoretical results are verified by contrast experiments. The maximum effective mutual inductance of BNSP transmitter is about 31.0% larger than that of BSP transmitter, and the efficiency of the system with output power of 10 kW is 93.5% with BNSP transmitter, about 2.4% higher than that with BSP transmitter. Besides, BNSP transmitter needs 5.9% shorter Litz wire and 53.1% smaller volume of cores, which makes it smaller in size. [ABSTRACT FROM AUTHOR]