D-86
Programming
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames E & F
Parameter Descriptions
MAX PHASE
PREF: 134.19
Default: 0.00
Range: 0.00 to 90.000 degrees
Set the motor’s phase shift advance at maximum current. If this parameter is unknown, value must be set to 0.
The current setpoint I is separated into two current setpoints Iq and Id, obeying the following rule - see
PHASE
above.
MAX TORQUE
PREF: 134.20
Default: 12.80
Range: 0.00 to 30000.00 Nm
Set the motor’s torque at maximum current.
●
KT
PREF: 134.21
Default: 1.376
Range: 0.0000 to100.0000 Nm/A
Torque constant (Kt, Nm/A rms).
This parameter is used to compute the current demand given a torque demand :
Current demand = Torque demand / KT
In order to have correct feedbacks the following equation MUST be true:
PERM TORQUE = KT * PERM CURRENT
On a PMAC motor, the ratio between the BACK EMF and the KT is always around 60:
BACK EMF (Volts rms/1000rpm)
≈ 60
* KT (Npm/Arms)
IFMB
PREF: 134.22
Default: 0.0
Range: -100.0000 to100.0000
A/Nm
3
Set the motor’s parameters to compute current setpoint from torque setpoint.
IFMB
torque
KT
torque
current
*
]
[
/]
[
]
[
3
+
=
If IFMB is unknown, the value must be set to 0.
INERTIA
PREF: 134.23
Default: 0.0010
Range: 0.0000 to 100.0000
Set the motor’s inertia. The units for this parameter are set by the INERTIA SCALE parameter.