ADVANCED APPLICATION OPTIONS
Operation with Permanent Magnet Motors
82
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
.
•
PM 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.
•
PM Rs [Motor-09]:
Motor stator resistance. If unknown, leave blank.
•
PM Ld [Motor-10]:
Motor inductance d-axis. If unknown, leave blank.
•
PM Lq [Motor-11]:
Motor inductance q-axis. If unknown, leave blank.
•
PM PG Angle [Motor-12]:
Motor offset angle. If unknown, leave blank.
•
PM Ke Coeff [Motor-13]:
Motor control coefficient. If unknown, leave blank.
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 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_SPM No-Rotation
or
4_IPM No-Rotation
. If a load is on the motor and
cannot 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 cur
-
rent 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.
Tune motor control - I/F Control
Related parameters:
•
I/F Current [Motor-24]:
Percentage of nominal motor current [SET-03] used to regulate AC current
during I/F Control.
•
Freq I/F to PM [Motor-27]:
When increasing frequency, the frequency to switch modes from I/F mode
to PMSVC mode.
Summary of Contents for Cerus X-Drive
Page 2: ......
Page 3: ...CERUS X DRIVE INSTALLATION AND OPERATION MANUAL Firmware Version 1 1 Franklin Electric Co Inc ...
Page 94: ...COMMUNICATIONS BACnet Communication 94 ...
Page 98: ...ACCESSORIES Optional Extension Cards 98 Frame D Frame E Frame F ...
Page 99: ...ACCESSORIES Optional Extension Cards 99 Frame G Frame H ...
