Arrangement for determining the angular position of a shaft of an electric motor, and windscreen wiper motor with an arrangement for determining the angular position
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United States of America Patent
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Jan 23, 2018
Grant Date -
Jan 1, 2015
app pub date -
Jan 31, 2013
filing date -
Feb 1, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to an arrangement (20) for determining the angular position of a shaft (11) of an electric motor (10), in particular of a shaft (11) of a windscreen wiper motor (100), with a magnet element arrangement, connected with the shaft (11), and several magnetic field sensors (26, 27, 28), wherein the angular position of the shaft (11) is inferred from the different signals of the magnetic field sensors (26, 27, 28). Provision is made, according to the invention, for the magnet element arrangement to comprise at least one magnet element, preferably several separate magnet elements (21, 22, 23), which are arranged one behind the other in the longitudinal direction of the shaft (11), and for the magnetic field sensors (26, 27, 28) to be arranged on a printed circuit board (30) which is arranged at a slight distance from the shaft (11), such that the magnetic fields of the magnet elements (21, 22, 23) are able to be determined by the magnetic field sensors (26, 27, 28).
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