A Rotary Encoder With an Eccentrically Mounted Ring Magnet

Wu, Shang–Teh; Chen, Jingying; Wu, Sheng-Tsai

doi:10.1109/tim.2014.2302243

Cited by 64 publications

(18 citation statements)

References 22 publications

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“…Owing to the high sensitivity, low power consumption and small physical dimension, MR sensors have been considered as promising magnetic sensors embedded in PS applications [88][89][90][91] and HCI systems [94][95][96][97][98][99][100][101]414]. This roadmap is shown in Figure 14.…”

Section: Position Sensing (Ps) and Human-computer Interaction (Hci)mentioning

confidence: 99%

“…The technological progress of MR sensors has resulted in a wide range of sensor applications, products, and services. These application areas require MR sensors with diverse properties, from high sensitivity and detectivity for biomedical applications , high mechanical flexibility and compactness for wearable/portable electronics , low power consumption and small physical dimension for position sensing (PS) [88][89][90][91] and human-computer interaction (HCI) [92][93][94][95][96][97][98][99][100][101], low cost and mass manufacturability for large-scale non-destructive evaluation and monitoring (NDEM) systems , to high accuracy and stability for navigation and transportation systems [123][124][125][126][127][128][129][130][131][132][133][134][135][136][137][138][139][140][141]. However, there is a lack of both an overview of the development of MR sensor applications and a strategic guide for future implementation of MR sensor technologies.…”

Section: Introductionmentioning

confidence: 99%

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Magnetoresistive Sensor Development Roadmap (Non-Recording Applications)

et al. 2019

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Magnetoresistive (MR) sensors have been identified as promising candidates for the development of high-performance magnetometers due to their high sensitivity, low cost, low power consumption, and small size. The rapid advance of MR sensor technology has opened up a variety of MR sensor applications. These applications are in different areas that require MR sensors with different properties. Future MR sensor development in each of these areas requires an overview and a strategic guide. A MR sensor roadmap (non-recording applications) was therefore developed and made public by the Technical Committee of The IEEE Magnetics Society with the aim to provide an R&D guide for MR sensors intended to be used by industry, government, and academia. The roadmap was developed over a three-year period and coordinated by an international effort of 22 taskforce members from 10 countries and 17 organizations, including universities, research institutes, and sensor companies. In this paper, the current status of MR sensors for non-recording

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Section: Position Sensing (Ps) and Human-computer Interaction (Hci)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetoresistive Sensor Development Roadmap (Non-Recording Applications)

et al. 2019

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“…The θ was position angle of the rotor [16][17][18]. The power unit produced a voltage three-phase inverter with an amplitude and offset [19,20]. The equations for Clarke and Park transformations are presented in Equation (1) and Equation 2, respectively: In order to enable fast calculations, the control was performed in a dq-axis rotating system.…”

Section: Control Unit For Pmsmmentioning

confidence: 99%

Measurement of the PMSM Shaft Position with An Absolute Encoder

Rudnicki

2019

Electronics

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The most critical aspect of assessing a permanent magnet synchronous motor is the problem of correctly measuring the position of the synchronous motor shaft. The purpose of this article was to show the effects of employing an absolute encoder to control a synchronous motor with permanent magnets while encountering disturbances. This problem is often overlooked, but it appears from time to time. The correct measurement of the shaft position eliminates improper motor operation characterized by jerking. The article showed that despite momentary erroneous readings of the shaft’s position, it was still possible to control the permanent magnet synchronous motor (PMSM). This also allows for correct measurement of the motor speed. This paper originally proposed an adaptive correction method for a rotary encoder.

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“…Understanding magnetic field distribution of a permanent magnet plays a key role in developing magnetic sensing devices [1] and medical appliances (i.e., magnetic resonance imaging) [2]. In other applications such as magnetic suspensions, levitated magnetic disks, magnetic gears, and magnetic couplings, the forces and torques generated by permanent magnets are of great interest [3].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Field Distribution of an Elliptical Permanent Magnet

Nguyen¹,

Lu²,

Robertson³

et al. 2019

PIER C

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The magnetic field distribution of an axially magnetised cylinder with an elliptical profile is analytically modelled and analysed in this paper. An accurate and fast-computed semi-analytical model is developed, based on the charge model and geometrical analysis, to compute three components of the magnetic field generated by this elliptical cylinder in three-dimensional space. The accuracy of the model is verified using Finite Element Analysis. The analytical expressions are efficient for calculating the implementation of the magnetic field, taking less than one millisecond to execute on a modern PC. Using the fast-computed analytical model, the distribution of the magnetic field of an axially magnetised cylinder with different elliptical profiles is studied and compared with that of a circular cylinder. The variations in magnetic field strength of axial, azimuthal and radial components can be used in novel sensing applications. The derived analytical model can be extended to calculate the magnetic field of arc-shaped elliptical and circular cylinders with axial magnetization, which can be used in Halbach arrangements.

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A Rotary Encoder With an Eccentrically Mounted Ring Magnet

Cited by 64 publications

References 22 publications

Magnetoresistive Sensor Development Roadmap (Non-Recording Applications)

Magnetoresistive Sensor Development Roadmap (Non-Recording Applications)

Measurement of the PMSM Shaft Position with An Absolute Encoder

Magnetic Field Distribution of an Elliptical Permanent Magnet

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