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  • Frequently Asked Questions About Magnets for Hall Effect Sensors and Reed Switch Applications
    Amp-Turns per inch of coil length develops one Oersted of magnetizing force, or a one Gauss field density, in an air core coil.
  • Sensor Sense: Inductive sensors and resistance welding
    triggering. Air-core coils wound on plastic spools reduce the coil's sensitivity to external magnetic fields. Low-permeability cores also reduce interference from outside magnetic forces while helping concentrate and direct the coil's own magnetic field. An internal time-delay circuit between
  • Technicalities
    CERAMIC CORES Ceramic is one of the common materials used for inductor cores. Its main purpose is to provide a form for the coil. In some designs it also provides the structure to hold the terminals in place. Ceramic has a very low thermal coefficient of expansion. This allows for relatively high
  • Coreless DC Motors
    cylindrical coil wound of copper wire and located in the center of the stator. A mechanical time constant of 1 msec is not unusual for this type of motor. Rotors are typically wound in a skewed or honeycomb pattern (also known as Faulhaber winding) to ensure that all of the core helps produce torque
  • Thin is In
    and outside of the coil dissipates heat. The biggest problem with wire-wound, slotted, iron-core motors is cogging. Motor designers in the past have tried various tricks to minimize cogging such as skewing magnets and minimizing slot size. But cogging is inherent because the motor design uses iron
  • Stainless steel for tight seals
    to the one-piece construction of their barrel housing. The induction coil ignores the metal in the sensor housing and reacts instead to the metal beyond the face across the air gap. But they also have advantages in damp, wet, and wash-down environments. The reason, of course, is their entire housing is made

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