ABSOLUTE POSITION RECORDING DEVICE OF MOTOR
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United States of America Patent
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Issued Date -
Aug 29, 2013
app pub date -
Nov 30, 2012
filing date -
Feb 24, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An absolute position recording device of a motor includes a main spindle, a magnetic ring, a magnetic induction unit, an encoder, a counter, and an operation unit. The magnetic ring and the encoder are fixed on and rotated by the main spindle. The magnetic induction unit outputs square waves and the encoder outputs sine or cosine waves. The counter receives the square waves and calculates a number of rotations of the magnetic ring. The operation unit receives the sine or cosine waves and calculates an angular deflection relative to a standard position of the magnetic ring. The operation unit adds the angular deflection and the number of rotations and calculates an absolute angular position.
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