Method for position and/or speed control of a linear drive
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United States of America Patent
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Jan 18, 2011
Grant Date -
Jun 26, 2008
app pub date -
May 24, 2006
filing date -
May 25, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for position and/or speed control of a linear drive utilizing a converter having a control unit and being coupled to a motor of the linear drive. The method includes determining, in a sensor-free manner, a motor position, generating a motor position signal, generating an acceleration signal utilizing an MEMS accelerometer provided in the control unit and arranged on a moving part of the linear drive, mathematically converting the motor position signal and the acceleration signal to a speed signal, and utilizing the speed signal to control the linear drive.
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