Magnetic encoder

Details Magnetic encoder Magnetic encoder

2011-03-01

2011-03-01

Aurora, Reena (Department: 2858)

Electricity: measuring and testing

Magnetic

Displacement

C324S207200, C324S207210

Reexamination Certificate

active

07898245

ABSTRACT:
A high-precision magnet encoder in which high-order harmonic components can be suppressed without increasing the number of lead wires connecting magnetic field detecting elements to a signal processing circuit. Hall sensors of phase A1, phase B1, phase A2and phase B2are arranged sequentially around a permanent magnet2at intervals of 90 degrees via an air gap. Hall sensors of phase C1, phase D1, phase C2, phase D2are arranged at positions 60 degrees away from the Hall sensors of phase A1, phase B1, phase A2and phase B2, respectively. Connection is made between the positive output terminals of a set of Hall sensors located at positions 60 degrees away from each other and between their negative output terminals.

REFERENCES:
patent: 58-162813 (1983-09-01), None
patent: 6-164015 (1994-06-01), None
patent: 10-300513 (1998-11-01), None
patent: 2001-033277 (2001-02-01), None
patent: 2002-243407 (2002-08-01), None
International Search Report of PCT/JP2007/057677, Mailing Date of May 15, 2007.

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