Method and device for pneumatically driving a turbocharger rotor in a balancing machine
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United States of America Patent
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Feb 28, 2017
Grant Date -
Feb 5, 2015
app pub date -
Mar 13, 2013
filing date -
Mar 14, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed is a method in which the propulsive power of a drive nozzle (2) is controlled by means of a programmable logic control device (24) having an adjustable internal controller (25) in dependence upon the rotational frequency of a turbocharger rotor (1) detected by a speed sensor (26). Parameters necessary for control are determined empirically in a tuning run which includes tuning the controller (25) to a proportional control action with high gain Kp and inputting the nominal balancing speed as target value for the controller (25), monitoring and comparing the actual speed with the target value. If the actual speed exceeds the set target value, halving the gain Kp of the controller (25) and repeating the run until the actual speed is below the set target value. Then it includes approximating the actual speed to the target speed by generating an additional target value, additively applying the additional target value to the target value, and incrementing or decrementing the additional target value until the target speed of the turbocharger rotor (1) is reached.
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