Parker AC890 Product Manual page 377

Parameter Descriptions
MAX PHASE
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
Set the motor's torque at maximum current.
● KT
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
Set the motor's parameters to compute current setpoint from torque setpoint.
current
[ ]  [
If IFMB is unknown, the value must be set to 0.
INERTIA
Set the motor's inertia. The units for this parameter are set by the INERTIA SCALE parameter.
D-86
Page
PREF: 134.19
PREF: 134.20
PREF: 134.21
PREF: 134.22
torque KT torque
/ ]  [ ]
PREF: 134.23
Default: 0.00
Default: 12.80
Default: 1.376
Default: 0.0
IFMB
*
3
Default: 0.0010
Range: 0.00 to 90.000 degrees
Range: 0.00 to 30000.00 Nm
Range: 0.0000 to 100.0000 Nm/A
Range: -100.0000 to100.0000
Range: 0.0000 to 100.0000
890SD Standalone Drive - Frames G, H & J
3
A/Nm