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
Courtesy
of
CMA/Flodyne/Hydradyne
▪
Motion
Control
▪
Hydraulic
▪
Pneumatic
▪
Electrical
▪
Mechanical
▪
(800)
426-5480
▪
www.cmafh.com
