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release time:2022-03-17Author source:SlkorBrowse:4581
Hall effect and Hall element
When a current flows through a semiconductor in a magnetic field, it generates a voltage (hall voltage) in a direction at right angles to the current. This phenomenon is known as the Hall effect. Hall element is a magnetic detection element using hall effect. Hall elements are made from InSb (indium antimonide) and GaAs (gallium arsenide). According to Fleming's right hand rule, a coil can generate an electromotive force by changing the magnetic field.
Using this principle, the coil can be used as a sensor to detect changes in the magnetic field. However, even if the coil could detect changes, it would not have the function of detecting the magnetic field itself. No matter how strong the field the coil is exposed to, there is no change in emf. In order to detect the rotor position of brushless DC motor, hall element is used. In addition to brushless DC motors, Hall elements are also used for magnetic detection of gauss meters, etc.
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