METHOD FOR PROTECTING AN ELECTRIC MOTOR FROM OVERLOAD
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United States of America Patent
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Issued Date -
Jun 25, 2015
app pub date -
Jun 11, 2013
filing date -
Jul 17, 2012
priority date (Note) -
Abandoned
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Abstract
A method for protecting an electric motor comprising a control unit and configured to drive an actuation device from an overload. The method includes detecting a critical operating state of the electric motor by querying changes of a desired value (Δx), calculating a load value (Load) from a number (Counter_SW) and a magnitude of the changes of the desired value (Δx), sending the load value (Load) calculated to the control unit of the electric motor, and determining the critical operating state if the load value (Load) calculated exceeds a defined maximum allowable load value (LM). A filter is activated so as to limit an adjustment speed if the load value (Load) calculated exceeds the defined maximum permissible load value (LM). The filter is deactivated if the load value (Load) calculated does not exceed the defined maximum allowable load value (LM).
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