Sensor system for controlling a motor
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United States of America Patent
Stats
-
Aug 10, 2004
Grant Date -
Jun 5, 2003
app pub date -
Nov 13, 2002
filing date -
Nov 22, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A sensor system for controlling a motor in a motor drive control system having a drive control circuit (4) that controls the driving of a motor (2) in accordance with an operation command, includes a main angle detecting unit (10) having a resolver (1) that detects the rotation angle of the motor (2) and a sub angle detecting unit (11) that estimates the rotation angle of the motor (2) on the basis of the counter electromotive power of the motor (2). The main angle detecting unit (10) detects the rotation angle of the motor (2) in a normal state, and the sub angle detecting unit (11) detects the rotation angle of the motor (2) when the main angle detecting unit (10) is in failure.
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