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  • Magnetic Sensors and Timing Applications
    offset voltage. The resulting signal is a small AC voltage that swings above and below a. Figure 4. The single-element Hall effect device is precisely located on the centerline of the sensor and is back biased with a strong magnet. The magnetic field intensity through the Hall device changes
  • Low Frequency Magnetic Transmitter Design
    . AN232. To increase sensitivity, one ensures that the transmitter. The question then is; what is the link between mag-. (TX) tank and receiver (RX) tank resonant frequencies. netic/electric fields and electromagnetic waves?. are the same as the desired magnetic field frequency. To find the answer, we
  • Low-Frequency Magnetic Transmitter Design (.pdf)
    ) tank and receiver (RX) tank resonant frequencies. netic/electric fields and electromagnetic waves?. are the same as the desired magnetic field frequency. To find the answer, we need to consider some proper-. Another aspect to bear in mind is that sensitivity is. ties of both magnetic and electric
  • Sensorless Field Oriented Control (FOC) for a Permanent Magnet Synchronous Motor Using a PLL Estimator and Field Weakening (.pdf)
    motors in its. Several application notes from Microchip explain the. category, coupled with decreased manufacturing costs. principles behind FOC. Two such examples are: and improved magnetic properties, make the PMSM a. AN1078 “Sensorless Field Oriented Control of PMSM. good recommendation
  • Magnetorheology
    . Importantly, the yield stress and viscosity of the fluid when in its active state can be controlled very. accurately by varying the magnetic field intensity. CPG has recently developed an MR fluid testing apparatus that integrates with a standard shear rheometer.
  • Medical Device Link .
    . A Metron Norway QA5 measuring device yielded the magnetic- field intensity measurements. In addition, an appropriate home-developed device measured the root-mean-square (rms) value of the induced electromotive force (EMF) by the presence of a time-varying electromagnetic field on a coil of one turn
  • Hubble Follows Rapid Changes in Jupiter's Aurora
    in the auroras' intensity and motion. They find that changes in brightness occur over the course of a Jovian day, perhaps due to compression of Jupiter's magnetic field on the sun-facing side of the planet. They also find emission features that are fixed on the planet, co-rotating with it. This global view
  • Medical Device Link .
    is using new forms of magnetic resonance imaging (MRI) and ultrasound not only to diagnose breast cancer, but also to treat it. Dutch entrepreneur Hugo Brunsveld van Hulten is developing a platform that uses MRI to locate cancerous tissue and high-intensity focused ultrasound (HIFU) to “burn