degdrive DGI900, User Manual

Page: 204 / 251

204
If the value of this parameter is small, the output torque of the AC
drive may fluctuate greatly, but the response is quick.
P9.09
Vector control over-excitation gain
Setting Range: 0
～
200 64
During deceleration of the AC drive, over-excitation control can restrain rise of the bus
voltage to avoid the overvoltage fault. The larger the over-excitation gain is, the better the
restraining effect is.
Increase the over-excitation gain if the AC drive is liable to overvoltage error during
deceleration. Too large over-excitation gain, however, may lead to an increase in output
current. Therefore, set this parameter to a proper value in actual applications.
Set the over-excitation gain to 0 in applications of small inertia
(the bus voltage will not rise during deceleration) or where there
is a braking resistor.
P9.10
Torque upper limit source in
speed control mode
Setting Range: 0
～
5 0
P9.11
Digital setting of torque upper
limit in speed control mode
Setting Range: 0.0%
～
200.0%
150.0%
0
：
P9.11 setting
；
1
：
VI
；
2
：
CI
；
4
：
X5 Pulse setting
；
5
：
Communication setting.
In the speed control mode, the maximum output torque of the AC drive is restricted by
P9.10. If the torque upper limit is analog, pulse or communication setting, 100% of the
setting corresponds to the value of P9.11, and 100% of the value of P9.11 corresponds to
the AC drive rated torque.
For details on the VI and C setting, see the description of the AI curves in group P3.
For details on the pulse setting, see the description of P3.32 to P3.35.