Title:
MAGNETIC ENCODER DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/055135
Kind Code:
A1
Abstract:
A magnetic encoder device having a reduced number of power supply wires for driving
a magnetic field element and of output signal wires, low in cost, and having high
degree of installation freedom. A circular plate-like permanent magnet (2)
forming a magnetism generation body is magnetized vertically and in parallel
to one direction relative to a rotating shaft (11) of a rotating body (1). A magnetic
field detection section (6) is placed on a processing circuit substrate (4),
at the center axis (10) of rotation of the rotating body (1). The magnetic field
detection section (6) has two magnetic field detection elements (not shown)
placed close to each other, and the detection elements are arranged to detect
magnetic fields in planes vertical to the rotating shaft, in the directions that
are different from each other. The magnetic field detection section (6) detects
magnetic fields in the directions of two axes of X and Y on a X-Y plane vertical to
the rotating shaft (11).
Inventors:
KABASHIMA TAKEFUMI (JP)
MUROKITA IKUMA (JP)
YOSHIDA KATSUMASA (JP)
YOSHIDA YASUSHI (JP)
MUROKITA IKUMA (JP)
YOSHIDA KATSUMASA (JP)
YOSHIDA YASUSHI (JP)
Application Number:
PCT/JP2006/321870
Publication Date:
May 18, 2007
Filing Date:
November 01, 2006
Export Citation:
Assignee:
YASKAWA DENKI SEISAKUSHO KK (JP)
KABASHIMA TAKEFUMI (JP)
MUROKITA IKUMA (JP)
YOSHIDA KATSUMASA (JP)
YOSHIDA YASUSHI (JP)
KABASHIMA TAKEFUMI (JP)
MUROKITA IKUMA (JP)
YOSHIDA KATSUMASA (JP)
YOSHIDA YASUSHI (JP)
International Classes:
G01D5/14
Foreign References:
| JP2002303536A | 2002-10-18 | |||
| JP2002071381A | 2002-03-08 | |||
| JP2003070284A | 2003-03-07 | |||
| JPH10232141A | 1998-09-02 |
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