Magnetic field sensor for measuring the rotational speed of a turboshaft
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United States of America Patent
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May 13, 2008
Grant Date -
Apr 5, 2007
app pub date -
Jun 26, 2006
filing date -
Jun 27, 2005
priority date (Note) -
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Abstract
A sensor for measuring the rotational speed of a turboshaft of a turbocharger includes a sensor housing and a sensor element which is positioned in the sensor housing and which senses a variation of a magnetic field caused by the rotation of the turboshaft. In order to provide a sensor for measuring the rotational speed of a turboshaft which can be produced simply and at low cost and also can be integrated in a turbocharger without major structural modifications, the sensor element can be positioned outside the turbocharger, on or in a compressor housing, and a pole piece is arranged on the sensor element in such a way that it concentrates the magnetic field in the sensor element.
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