Bosch PIN8 N1 Guia de Resolução de Problemas Página 247

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MPH-02, MPB-02, MPD-02 Drive Control 6-35
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
master
oper. mode 2
oper. mode 1
DF000090v01_en.fh7
open-loop drive control
cmd. value adjustment
(depending on oper. mode)
drive controller
open-loop
motor control
(U/f)
- without encoder -
limitation
torque/current
Fig. 6-23: Principle of drive control in open-loop operation
Features
The velocity control has the following features:
fine interpolation of the velocity command value (can be switched off)
monitoring of the velocity control loop (can be switched off via
P-0-0556, bit 1)
filtering of actual velocity value to be parameterized
additive velocity command value (S-0-0037)
display of resulting command value (in P-0-0048)
monitoring and limitation of the maximum stator frequency change
that results from the command velocity change
stall protection loop (PI loop that can be optionally activated to
prevent breakdown of the machine when the torque limits are attained)
slip compensation (feedforward of estimated slip of the machine by
means of rotor time constant and slip compensation factor)
calculation of output voltage by means of a U/f characteristic based
on motor model data
subsequent trimming of magnetization via premagnetization factor
(linear or square characteristic to be selected)
IxR boost (adjustable load-dependent feedforward of the output
voltage due to the voltage drop on the motor winding resistance)
oscillation damping (adjustable load-dependent feedforward to
prevent velocity oscillations in the partial load and idling ranges)
current limitation loop to protect the output stage
velocity search mode of a coasting machine after switching drive
enable on (can be set for one or both rotational directions)
Pertinent Parameters
S-0-0037, Additive velocity command value
S-0-0040, Velocity feedback value
S-0-0091, Bipolar velocity limit value
P-0-0048, Effective velocity command value
P-0-0049, Effective torque/force command value
P-0-0555, Status word of axis controller
P-0-0556, Control word of axis controller
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