Method and circuit arrangement for operating stepper motors
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United States of America Patent
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Nov 27, 2007
Grant Date -
Mar 9, 2006
app pub date -
Jun 7, 2003
filing date -
Jun 7, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A method and a circuit arrangement for operating stepper motors or other appropriately dimensioned synchronous motors is disclosed in which between a first operational mode for normal motor operation and a second operational mode for detecting an operating state of the motor like for example its load can be switched. The method and the circuit arrangement is especially provided for determining a reference position of the motor without sensors by driving the motor against a mechanical stop wherein an increase of the load which is caused by this, is detected as a change of the operating state (FIG. 1).
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