Position and speed detecting device
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United States of America Patent
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-
May 8, 1990
Grant Date -
N/A
app pub date -
Apr 6, 1989
filing date -
Apr 6, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A position and speed detecting device is provided. This device includes a detection-signal generator comprising a rotor magnet assembly having a plurality of magnetic poles and a coil pattern for signal detection which moves relatively facing magnetized bodies of the rotor magnet assembly, a speed-signal detector for taking out a signal for frequency detection from said coil pattern for frequency-signal detection to produce a signal for speed detection; and a position-signal detector for producing a signal for position detection from said coil pattern for position-signal detection. An interface of at least one pair of S and N magnetic poles slanted at an angle different from that of interfaces of other magnetic poles and a part of coil pattern in the coil pattern for signal detection is slanted at an angle substantially the same as that of the magnetic poles for position-signal detection and other part of coil pattern is formed at an angle substantially the same as that of the magnetic poles for frequency-signal detection to make it a coil pattern for frequency-signal detection.
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