Energy harvesting derived from magnetization reversal in FeCoV wire

Serizawa, Ryohei; Yamada, Tsutomu; Masuda, Sumio; Abe, Susumu; Kohno, S.; Kaneko, Fumio; Takemura, Yasushi

doi:10.1109/icsens.2012.6411069

Cited by 10 publications

(11 citation statements)

References 6 publications

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“…When opposite magnetic fields with the appropriate strengths are applied to the Wiegand wire, the soft layer with the low coercivity will first flip [14][15][16], as demonstrated in Figure 2b. This magnetization reversal of the soft layer is accompanied by a large Barkhausen jump, which is also known as the Wiegand effect [9][10][11]. A magnetization reversal of the soft layer from the antiparallel to the parallel process, against the hard core was observed by applying an asymmetric field, which has been previously reported [3].…”

Section: Wiegand Effectsupporting

confidence: 55%

“…This results in a "soft layer" with a soft magnetic appearance and low coercivity of approximately µ 0 H = 1 mT. This also resulted in a hard center, known as the "hard core", with a larger coercive force of approximately from µ 0 H = 1 to 8 mT [7][8][9][10][11][12]. The magnetic properties of the twisted FeCoV wires depend on the conditions of the annealing and torsion stress, which have been previously reported [6].…”

Section: Wiegand Effectmentioning

confidence: 58%

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Improvement of Pulse Voltage Generated by Wiegand Sensor Through Magnetic-Flux Guidance

Yang

Sakai

Yamada

et al. 2020

Sensors

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Magnetization reversal in a Wiegand wire induces a pulse voltage in the pickup coil around the wire, called the Wiegand pulse. The Wiegand sensor features the Wiegand wire and the pickup coil. The amplitude and width of the Wiegand pulse are independent of the frequency of the magnetic-field change. The pulse is generated by the Wiegand sensor, which facilitates the use of the Wiegand sensor as a power supply for equipment without batteries. In order to meet the power consumption requirements, it is necessary to maximize the energy of the pulse signal from the Wiegand sensor, without changing the external field conditions. The distributions of the magnetic field generated from the applied magnet in air and in the Wiegand wire were simulated before the experiments. Simulation predicted an increase in the magnetic flux density through the center of the Wiegand wire. This study determined that the magnetic flux density through the center of the Wiegand wire, the position of the pickup coil, and the angle between the Wiegand sensor and the magnetic induction line were the main factors that affected the energy of a Wiegand pulse. The relationship between these factors and the energy of the Wiegand pulse were obtained.

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Section: Wiegand Effectsupporting

confidence: 55%

Section: Wiegand Effectmentioning

confidence: 58%

Improvement of Pulse Voltage Generated by Wiegand Sensor Through Magnetic-Flux Guidance

Yang

Sakai

Yamada

et al. 2020

Sensors

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“…5(b) is used for a counter/encoder application. It has been also found that a movement of a single magnet is capable of an excitation field of both the positive and negative direction to the wire [27,28]. This excitation method using a single magnet shown in Fig.…”

Section: A Energy Harvesting From Twisted Fecov Wiresmentioning

confidence: 88%

“…Vibration at frequency ranges other than the specific frequency generally results in a decrease in the electricity generation efficiency. Electricity generation from a vibration-type energy-harvesting element using an FeCoV wire was studied [3,27]. The specific feature of the Wiegand effect can be more advantageous in applications detecting a single event of substantial movement or motion with extremely low speed.…”

Section: A Energy Harvesting From Twisted Fecov Wiresmentioning

confidence: 99%

Batteryless Hall Sensor Operated by Energy Harvesting From a Single Wiegand Pulse

et al. 2017

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We operated a Hall sensor using energy harvested from a magnetic wire. A battery-less sensor is expected to be a key device for the internet of things (IoT). Magnetization reversal in magnetic wires with bistable magnetization states induces a pulse voltage in a pickup coil. The amplitude of the voltage is independent of the applied field frequency, down to zero. This fast magnetization reversal is accompanied by a large Barkhausen jump, which has been known as the Wiegand effect. Electricity generation using this effect, obtained with twisted FeCoV magnetic wires, was studied. The energy obtained as a single pulse voltage was 600 nJ. The Hall sensor was operated with this pulse voltage. The pulse power of 0.88 V/1.3 mA was applied to the Hall sensor. The Hall voltage was proportional to the sensing magnetic field of 50-300 mT.Index Terms-Battery-less sensor, energy harvesting, FeCoV wire, Hall sensor, Wiegand effect, Wiegand pulse.

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“…The Wiegand sensor is comprised of a magnetic wire, normally a twisted FeCoV wire, and a pick-up coil wound around it. Owing to a constant voltage pulse induced in the pick-up coil, the sensor has been used for rotation sensing and other applications [9,10]. Recently, the Wiegand sensor has attracted significant attention as a power supply for the battery-less operation of electric devices and for energy harvesting [11].…”

Section: Introductionmentioning

confidence: 99%

Output Characteristics and Circuit Modeling of Wiegand Sensor

Sun¹,

Yamada²,

Takemura³

2019

Sensors

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A fast magnetization reversal in a twisted FeCoV wire induces a pulse voltage in a pick-up coil wound around a wire. The Wiegand sensor is composed of this magnetic wire and the pick-up coil. As the output pulse voltage does not depend on a changing ratio of the applied magnetic field to switch the magnetization of the wire, the Wiegand sensor is used for to perform rotation and other detections. Recently, the Wiegand sensor has attracted significant attention as a power supply for battery-less operation of electric devices and for energy harvesting. In this study, we propose a concept of obtaining an intrinsic pulse voltage from the Wiegand sensor as its power source, and demonstrate its effectiveness in circuit simulation. The equivalent circuit for the Wiegand sensor is expressed by the intrinsic pulse voltage, internal resistance, and inductance of the pick-up coil. This voltage as a power source and circuit parameters are determined by MATLAB/Simulink simulation. The output voltage calculated using the equivalent circuit of the Wiegand sensor agrees with the experimentally measured results.

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Energy harvesting derived from magnetization reversal in FeCoV wire

Cited by 10 publications

References 6 publications

Improvement of Pulse Voltage Generated by Wiegand Sensor Through Magnetic-Flux Guidance

Improvement of Pulse Voltage Generated by Wiegand Sensor Through Magnetic-Flux Guidance

Batteryless Hall Sensor Operated by Energy Harvesting From a Single Wiegand Pulse

Output Characteristics and Circuit Modeling of Wiegand Sensor

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