Flux guide

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Magnetic proximity switch with increased sensitivity through field guidance

A flux guide or flux concentrator is a component made of a magnetically highly permeable material (e.g. soft iron ) which, due to this property , concentrates (amplifies) or (further) conducts the magnetic flux of a magnetic field acting on the guide , e.g. B. to a permanent magnet (for example when magnetizing the same) or to a magnetic field sensor (for example to increase its sensitivity or to change the measuring axis).

Flux guide pieces are also used for galvanically separated current sensors , e.g. B. in a clamp meter .

Flux guide pieces are also used in electric motors and generators (as pole pieces ), loudspeakers and microphones and, more recently, in induction heating devices.

With the general trend towards miniaturization , flux guide elements are now also applied to integrated circuits with magnetically active sensor elements.

Individual evidence

  1. ↑ http://www.freepatentsonline.com/EP0724712.html
  2. ↑ http://www.sensorsmag.com/sensors/electric-magnetic/measuring-current-with-imc-hall-effect-technology-786
  3. ↑ http://www.edn.com/article/462897-Automotive_Hall_effect_rotary_position_sensor_uses_novel_flux_concentrator_technology.php  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.@1@ 2Template: Dead Link / www.edn.com  
  4. ↑ http://www.freepatentsonline.com/EP0749877.html
  5. ↑ http://www.patent-de.com/19970828/DE19605412A1.html
  6. ↑ Archived copy ( Memento of the original from March 25, 2011 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. @1@ 2Template: Webachiv / IABot / www.alpha1induction.com
  7. ↑ https://www.youtube.com/user/Fluxtrol
  8. ↑ http://128.178.153.250/research/techno/  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.@1@ 2Template: Dead Link / 128.178.153.250  

References

  • D. Spickermann: Passive electronic components . J. Schlembach Fachverlag, 2001, ISBN 3-935340-13-3 , p. 369.
  • Popovic et al .: A new CMOS Hall angular position sensor . Technisches Messen Vol 6, June 2001, pp. 286-291.