Encoder for a permanent magnet sinusoidal brushless motor in an electric power steering system
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United States of America Patent
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Nov 26, 2002
Grant Date -
Nov 29, 2001
app pub date -
Feb 16, 2001
filing date -
Feb 16, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An encoder for a brushless motor of an Electric Power Steering (EPS) system that includes a commutation track coupled to a shaft for the generation of a commutation signal. The commutation signal in turn is used to generate an index signal every electrical cycle. The encoder further includes a set of high-resolution quadrature signal tracks. The set of high-resolution quadrature signal tracks generate a set of high-resolution signals which are phased at a set angular displacement with respect to one another. A set of sensors sense the commutation signal and the set of high resolution quadrature signals.
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