Franklin Electric CERUS X-DRIVE CXD-003A-4V, Installation And Operation Manual

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ADVANCED APPLICATION OPTIONS
Operation with Permanent Magnet Motors
100
Permanent Magnet Specific Parameters
Enter motor parameters unique to the installation:
•
Control Method [Motor–05]: This should be
2_Sensorless
Vector Control.
• Motor Type [Motor–06]: Set to 1_PM-SPM or 2_PM-IPM .
• Motor Poles [Motor–07]: Set the number of poles in the motor. (Poles = Base Freq x 120 / RPM.)
• PM Inertia [Motor–08]: If unknown, use the value calculated by the drive.
Motor Specific Parameters
Input motor characteristic parameters. If any motor characteristic parameters are unknown besides PM PG
Angle [Motor-12]
, then an autotune is required to measure these values.
NOTE: If any of the following are unknown, leave blank.
• PM Rs [Motor-09]: Motor stator resistance.
• PM Ld [Motor-10]: Motor inductance d-axis.
• PM Lq [Motor-11]: Motor inductance q-axis.
• PM PG Angle [Motor-12]: Motor offset angle.
• PM Ke Coeff [Motor-13]: Motor control coefficient.
Autotune Characteristic Parameters
1. If a sine filter is connected to output of drive, either disconnect the capacitors or remove sine filter
between drive and motor cable so that the motor cable is directly connected to the drive. Make sure all
power to the drive is disconnected before changing wiring.
2. Set Motor A-Tuning [Motor-00] to 3_PM Rotating or 4_PM No-Rotation . If a load is on the motor and can -
not be removed, then a “no-rotation” option should be selected. Remove load from the motor to then
use “Rotating.”
a. An autotune “no-rotation” will output high frequency into the motor to calculate the motor
impedance values but not the Ke Coeff.
b. An autotune with rotation will do same as “no-rotation” and then turn the rotor of the motor to
calculate the Ke Coeff (Vphase, rms / krpm).
3. Start Autotune by initiating a start command.
4. Once Autotune is complete, the drive will populate PM characteristic parameters.
5. If using a sine filter, reconnect filter between drive and motor cable.
Tune motor control – DC Alignment
Related parameters:
•
I/F Current [Motor-24]: Percentage of nominal motor current
[SET-03]
used to regulate output current
during DC current during PM DC Alignment.
• DC-Tun Curr P [Motor-39]: Proportional gain value regulating DC current during DC Alignment of PM
motor.
• DC-Tun Curr I [Motor-40]: Integral gain regulating DC current during DC Alignment of PM motor.
The DC Alignment process rarely needs adjusting. However, if the motor is not aligning properly, the user
may detect unexpected high current loads or an unusual rumbling sound at low frequency. This might occur
when the motor leads are very long (> 3000 ft) or high load prevents motor movement. In this case, start by
increasing the
I/F Current [Motor-24]
, and then
DC-Tun Curr P [Motor-39]
if necessary.