Lenze DSD Bedienungsanleitung Seite 301

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Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23 301
10 Structure of the drive axis
10.3 Drive concept
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10.3.5.1 Encoderless motor control for vertical conveyors/hoists
An application is defined as a vertical conveyor if the gravitational force acts significantly on the mo-
tor torque. Cable-guided hoists and linear applications with an angle of tilt of more than 45° (belt
drives, rack drives, spindle drives, travelling drives) are recognised as vertical conveyors by DSD.
Drive systems for vertical conveyors must ensure a reliable and continuous operation of the appli-
cation at all times. For this task, a special motor management is required.
Drive systems with feedback are very well-suited for vertical conveyors. For applications without
feedback, the motor management must also ensure a continuous and safe operation of the drive,
even without encoder, and for the transition phases lifting/lowering and lowering/lifting in partic-
ular. During this four-quadrant operation, the motor control must also ensure safe operation of the
"Zero-Hertz field frequency" operating status.
DSD efficiently supports the user during the drive dimensioning phase and
provides suitable control types and encoderless drive systems for certain power ranges,
considers the operating behaviour of the drive system during the dimensioning phase,
checks necessary overdimensioning of the drive components and the max. permissible motor
utilisation,
detects the utilisation of the selected drive components,
signalises exceedances of limit values by means of warning signals or notes.
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