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

Fujinaga, N.; Takebuchi, A.; Yamada, Tsutomu; Takemura, Yasushi

doi:10.1109/tmag.2017.2713837

Cited by 28 publications

(40 citation statements)

References 23 publications

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“…In addition to its use as the power source of medical devices, the Wiegand sensor can also be used as an energy-harvesting module and power source for the battery-less operation of electronic devices. [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…Then the internal circuit parameters in the equivalent circuit of the Wiegand sensor, especially the inductance of the receiver coil, should be taken into consideration. Although the application of the Wiegand sensor for the battery-less operation of a rotary encoder [9] is an attractive topic, particularly from the point of view of the industry, only few articles on the Wiegand sensor have been published [10,11] other than those by our group [7,8,12,13]. As Saggini et al reported for the circuit analysis of the Wiegand sensor for low-power energy harvesting solutions [10], it is significant to study the circuit parameters for applications of the Wiegand sensor.…”

Section: Introductionmentioning

confidence: 99%

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Circuit Parameters of a Receiver Coil Using a Wiegand Sensor for Wireless Power Transmission

Takahashi

Yamada

Takemura

2019

Sensors

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We previously demonstrated an efficient method of wireless power transmission using a Wiegand sensor for the application in implantable medical devices. The Wiegand sensor has an advantage in inducing sharp pulse voltage independent of the drive frequency. A down-sized receiver coil for wireless power transmission within blood vessels has been prepared, which enables medical treatment on any part of a human body. In order to develop practical applications of the Wiegand sensor as implantable medical devices, the circuit design is important. The circuit parameters in the circuit model of the Wiegand sensor must be clearly identified. However, a fast reversal of magnetization of the magnetic wire used in the Wiegand sensor, known as a large Barkhausen jump, and the induced nonlinear pulse signal make the inductance of the receiver coil time-dependent and inconsistent as conventionally considered in circuit analysis. In this study, the voltage and current responses of a wire-core coil are analyzed, and the time-dependent inductance is determined. The results showed that the inductance depends on the magnetization state of the wire, which can be negative during the fast reversal of magnetization.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Circuit Parameters of a Receiver Coil Using a Wiegand Sensor for Wireless Power Transmission

Takahashi

Yamada

Takemura

2019

Sensors

Self Cite

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“…5), in which both of measured full and minor loops have been shown. The magnetization alignment of the soft layer and the hard core can be either in a parallel state or an antiparallel state, as shown in Fig.…”

Section: A D V a N C E P U B L I C A T I O Nmentioning

confidence: 85%

“…the FeCoV wire of 0.25 mm diameter 4,5) . The volumes of the soft and hard core were 23% and 77%, respectively.…”

Section: A D V a N C E P U B L I C A T I O Nmentioning

confidence: 99%

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Power Supply for Medical Implants by Wiegand Pulse Generated from Magnetic Wire

et al. 2018

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Implantable medical devices are utilized in the human body for maintaining good health. As these devices are becoming increasingly functionalized, supplying power to them has become very important. Instead of batteries, technologies for wireless power supplies are being developed, such as inductive coupling or piezoelectric elements. However, we propose the use of magnetic wires for this purpose. Inside these wires, a fast magnetization reversal, called a "large Barkhausen jump," occurs due to an applied magnetic field. This reversal induces a large pulse voltage in pick-up coils, which is called a "Wiegand pulse." By applying this pulse as an electric source, a higher electric power is expected compared with the conventional method using a sinusoidal excitation field. A wire core coil was prepared, and open-circuit voltage was measured. In addition, DC voltage and electric power were measured by connecting the wire core coil to a rectifier. The experimental results confirmed the superiority of using a Wiegand pulse at an applied magnetic field intensity of 60 Oe and a frequency of lower than 10 kHz.

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High precision MI sensor with low energy consumption driven by low-frequency Wiegand pulse

2023

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This study introduces a new method to drive high-precision magneto-impedance (MI) sensors with low power consumption using a Wiegand sensor to replace the oscillator circuits of the MI sensor. We studied the characteristics of an MI sensor driven by low-frequency pulses and concluded that pulses with a fast rise time and small excitation current are necessary to induce a significant MI effect. The Wiegand sensor induced 10 Hz low-frequency pulse voltages of approximately 12 V and a constant width of 20 μs when an alternating magnetic field of 5 mT/ μ0 alternating magnetic field was applied. A fast rise-time-shaping circuit was designed to shape the Wiegand pulses with a fixed amplitude and rise time of less than 100 ns. The MI sensor exhibited a good output linearity of 0.04 mV/ μ0T for detecting magnetic field in the range of ±150 μT when Wiegand pulses of amplitude 1 V were supplied. The power consumption of the MI sensor was reduced from milliwatts (mW) to microwatts ( μW) and its usage time was extended by 300% compared to that of the previous design. This newly designed MI sensor is suitable for use in bio-magnetic field measurements, constant vehicle detection devices, and other applications.

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

Cited by 28 publications

References 23 publications

Circuit Parameters of a Receiver Coil Using a Wiegand Sensor for Wireless Power Transmission

Circuit Parameters of a Receiver Coil Using a Wiegand Sensor for Wireless Power Transmission

Power Supply for Medical Implants by Wiegand Pulse Generated from Magnetic Wire

High precision MI sensor with low energy consumption driven by low-frequency Wiegand pulse

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