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Hall sensors from DC brushless fans

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LAN_403

Dr. Dark Current

Tue Dec 30 2008, 11:15AM

Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384

As far as I understand, brushless fans use hall sensors to detect the rotor position. Could this sensor be used to build a magnetic levitation device?

Avi

Tue Dec 30 2008, 12:26PM

Registered Member #580 Joined: Mon Mar 12 2007, 03:17PM
Location: Melbourne, Australia
Posts: 410

there is 2 types, the analog type gives voltages above the 0 field voltage with one magnetic pole and voltages below this for the other pole. the stronger the field the stronger the offset.
the second type is digital, which output logic high when a particular field strength is exceeded.
keep in kind the bandwidth is only in the 10s of Khz.

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