8400 BaseLine D | Software Manual
Motor control (MCTRL)
Selection of the operating mode
72
L
Firmware 03.00 - DMS EN 5.0 - 07/2009
Field-oriented vector control
The field-oriented vector control provides better drive properties than the V/f
characteristic control. These are in particular:
A higher maximum torque over the whole speed range,
a higher speed accuracy,
a higher concentricity factor,
a higher efficiency.
The limitation of the maximum torque in motor and generator mode for speed-
actuated operation
Tip!
If you need a high torque without feedback at low speed, we recommend the
“vector control" mode.
As shown in the following graphics, the drive systems with vector control have more
advantages than a system using V/f control.
V/f characteristic control without feedback
Vector control without feedback
9300vec092
9300vec095
Operation in motor mode (CW rotation),
Operation in generator mode (CCW rotation),
Operation in motor
mode (CCW rotation),
Operation in generator mode (CW rotation)
0
1
2
3
n
N
M
N
M
-M
N
-n
N
n
0
1
2
3
n
N
M
N
M
-M
N
-n
N
n