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  • The Hall Effect Gauss / Tesla Meter
    Magnetic fields are well defined in theory but do not behave so predictably in real life. Often the root cause for the failure of a design involving magnetic. Photo 1. Hall effect devices, or Hall generators, are made by attaching four electrical contacts to a thin square or rectangular plate
  • Reed Sensors vs. Hall Effect Sensors (.pdf)
    Since their introduction several years ago, the Hall effect sensor has captured the imagination of design engineers. Generally, it was thought that if it's in solid state that it's a more reliable approach, particularly when comparing it to electromechanical devices. However, several remarkably
  • Sensor Sense: Hall-effect current sensors
    feeds an electronic circuit that checks it for control or overload sensing. A new generation of small Hall-effect-based current sensors simplify the task. Hall-effect devices measure current via the intensity of the magnetic field generated by the current flow. Of course, higher currents produce
  • Current Sensor Info.
    Open Loop Operating Principle In a hall effect-based current sensor, the magnetic flux, proportional tothe primary current, is concentrated in gapped magnetic corecontaining the hall effect device (Fig. 1). The primary current ismeasured without electrical contact with the primary circuit
  • How to select Hall-effect sensors for brushless dc motors
    Brushless dc (BLDC) motors need to operate more efficiently as energy and cost. savings becomes a bigger concern for designers of electronic devices. One way to. help ensure greater efficiency is by selecting the correct bipolar latching Hall-effect sensor IC for electronic commutation in BLDC
  • High-five to high-side current sensing
    ACS75x current sensor depicts the main current path, the Hall-effect sensor with integrated electronics, and a magnetic concentrator which tightly couples the magnetic field of the measured current to the Hall-effect device. The Hall-effect device makes up only a small portion of the electronics
  • Reducing cogging torque in brushless motors
    is a Hall-effect device. The shape of the magnetic flux density in the air gap of an assembled motor is an indicator of its cogging torque. An example are these three curves shown for one pole pair. Each theoretical curve represents different magnetization and pole-arc angles for the same air gap length
  • Medical Device Link .
    Spotlight on Precision Motion Control A three-phase bridge-type brushless dc motor driver uses pulse-width modulation to control speed. The BLDC-350 has a brake input to enable dynamic and static motor braking. The controller includes Hall-effect sensors for commutation, and an integral heat sink

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