This paper presents a mechanically-robust high-power-density electromagnetic vibration energy harvester fabricated from MP35N alloy. Its primary focus is on the use of MP35N alloy, and the corresponding performance. It follows our prior work on a similar harvester fabricated in silicon that now provides a performance baseline. The optimized design flow developed in our prior work is applied here, yielding mechanical, electrical, and magnetic design decisions, and harvesting performance, that remain largely unchanged. Importantly, while supporting comparable harvesting performance, the new material significantly improves robustness and ruggedness as needed for practical applications. The MP35N harvester suspension is fabricated using a combination of water-jet and electrical-discharge machining. The resulting harvester has an active volume of 1.81 cm³, and an output power $P_{Out}$ of 1.26 mW at 1.08 g and 107.7 Hz under matched load. This yields a power density (PD) of 0.7 mW/cm³ and a normalized power density (NPD) of 0.6 mW/cm³/g². Importantly, the new harvester survives a 6-foot drop, and ordinary handling during fabrication and operation. The addition of backiron is shown to reduce magnetic-path reluctance, increase magnetic coupling, and thus increase output power. The harvester with backiron has an active volume of 2.17 cm³, and a $P_{Out}$ of 2.2 mW at 1.3 g under matched load, yielding a PD of 1.01 mW/cm³ and an NPD of 0.6 mW/cm³/g². [2020-0261]

中文翻译：

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MP35N合金制造的电磁平移振动能量收集器

本文介绍了一种由 MP35N 合金制成的机械坚固的高功率密度电磁振动能量收集器。它的主要重点是MP35N合金的使用，以及相应的性能。它遵循我们之前在硅制造的类似采集器上的工作，该采集器现在提供了性能基线。在我们之前的工作中开发的优化设计流程在这里应用，产生机械、电气和磁性设计决策，以及收获性能，在很大程度上保持不变。重要的是，在支持可比的收获性能的同时，新材料显着提高了实际应用所需的坚固性和耐用性。MP35N 收割机悬架采用水射流和放电加工相结合的方式制造。生成的收割机的活动体积为 1。³、输出功率 $P_{外}$ 在匹配负载下 1.08 g 和 107.7 Hz 时为 1.26 mW。这产生0.7 mW/cm ³的功率密度(PD)和0.6 mW/cm ³ /g ²的归一化功率密度(NPD) 。重要的是，新的收割机能够承受 6 英尺的跌落，以及制造和操作过程中的普通处理。显示添加背铁可以降低磁路磁阻，增加磁耦合，从而增加输出功率。带背铁的收割机的有效容积为 2.17 cm ³，以及 $P_{外}$ 在匹配负载下在 1.3 g 下为 2.2 mW，产生 1.01 mW/cm ³的 PD和 0.6 mW/cm ³ /g ²的 NPD 。[2020-0261]