Vibration Energy Harvester Based on Various Magnetic Phase Change Alloys

Abstract

The invention belongs to the field of energy collection, in particular to a vibration energy harvester based on a variety of magnetic phase change alloys, including: Heusler-type alloys and MnCoSi-based alloys are respectively vertically fixed at both ends of the lower yoke, and permanent magnets are fixed on the lower magnetic yoke. The middle of the yoke; the upper end of the permanent magnet is provided with a buffer layer, and the upper part of the Heusler-type alloy, MnCoSi-based alloy and the buffer layer is provided with an upper yoke, and the upper and lower yokes are wound in the range between the two permanent magnets. The two ends of the coil Connect the rectifier circuit and capacitor. The vibration energy harvester of the present invention adopts Heusler-type alloy and MnCoSi-based alloy as the core components of the device, utilizes the magnetic sensitivity of Heusler-type alloy and MnCoSi-based alloy to stress, and realizes weak magnetic / ferromagnetic state and antiferromagnetic / ferromagnetic state At the same time, the magnetic yoke is used to realize the transmission of the magnetic force lines in the complete magnetic circuit, so that the magnetic flux leakage phenomenon in the device is avoided, and the change of the magnetic flux is effectively increased to improve the energy conversion efficiency.

Description

technical field [0001] The invention belongs to the field of energy collection, in particular to a vibration energy collector based on various magnetic phase transition alloys. Background technique [0002] With the advancement of integrated circuit technology and micro-electromechanical system (MEMS) technology, more and more low-power sensing devices are used in all aspects of life, which greatly improves people's lives. How can these extensive Distributed devices to provide energy is an urgent problem in this field. At present, the scientific community has proposed that green energy widely exists in the natural environment. The energy that can be collected in the environment mainly includes solar energy and wind energy. However, these energy sources are often affected by many factors, and the energy conversion efficiency is extremely low. For example, light energy harvesting can only be carried out during sunny periods, and it is almost difficult to collect energy at nig...

AI Technical Summary

Problems solved by technology

[0007] By summarizing the structure and principle of the above three electromagnetic vibration energy devices, it can be found that the magnetic flux in the coil changes through the relative motion of the magnet and the coil to generate electric energy. It cannot pass through the coil completely, so that the device has magnetic flux leakage, especially at low frequencies, the magnetic flux leakage in the magnetic circuit reduces the magnetic induction intensity in the magnetic circuit, and the energy conversion efficiency is not high, and the resulting induced electromotive force is low, and the power conversion efficiency is low.

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