ADVANCED APPLICATION OPTIONS
Multi-Motor Configurations
83
•
Freq PM to I/F [Motor-28]:
When decreasing frequency, the frequency to switch modes from PMSVC
mode to I/F mode.
•
I/F Fltr Time [Motor-29]:
Low-pass filter time of current being commanded from I/F Current [Motor-
24].
The drive regulates current level at I/F Current as frequency ramps up to Freq I/F to PM. Once above this fre
-
quency, the Advance V/F Control becomes active. Ramping down to Freq PM to I/F switches out of Advance
V/F Control to I/F current regulation. The current regulation averages current value base on I/F fltr time.
If the motor load does not rotate up to Freq I/F to PM, the I/F Current needs to increase. If the I/F Current is
at maximum without load rotating, reduce I/F current to below 100% and set acceleration rate to a higher
value. If more torque is required, increase switching frequency
[SET-06]
.
Tune motor control - PM Control
Related parameters:
•
Torque Filter T [Motor-15]:
Response time in controlling torque to motor.
•
Torque Cmp Gain [Motor-17]:
Gain value for output voltage increase to compensate for voltage drop
on stator resistance at high motor loads in torque compensation function. For PM motors, max value is
5000. Setting Torque Cmp Gain to 0 will remove I/F control and disable stability.
•
PM Bandwidth HS [Motor-25]:
Allowable frequency bandwidth around desired frequency in order to
adjust operating frequency to prevent vibrations in motor operation.
•
PMSVC Fltr Gain [Motor-26]:
Gain value in adjusting the operating frequency from the desired fre
-
quency to prevent vibrations in motor operation.
•
PM Trq Comp I/F [Motor-37]:
PM Torque Compensation in I/F Mode.
•
PM Trq Comp SVC [Motor-38]:
PM Torque Compensation in SVC Mode (Advance V/F Control).
IMPORTANT:
PM Trq Comp I/F
and
PM Trq Comp SVC
are only operable in MagForce application. PM Motor Applica
-
tion uses
Torque Cmp Gain
.
The drive outputs nominal voltage based on desired frequency. Frequency compensation (stabilizer) is
quickly adjusting the desired frequency to prevent overcurrent or high voltage on DC bus. The torque com
-
pensation control is adjusting output voltage to ensure rotor magnetization is at correct level for desired
torque with respect to operating frequency. The switching frequency should be increased by at least 1.5
times the resonant frequency of the sine filter.
PM motors can be unstable with no loads at high frequencies. If there is a light or no load, the Torque Cmp
Gain will need to be increased until stability is achieved. Increasing the switching frequency helps in provid
-
ing stability. If a more precise output frequency is desired, lower the PM Bandwidth HS.
Multi-Motor Configurations
Several multi-motor configurations are available:
•
Equal Run Time
•
Soft Start Mode
•
Lead-Lag
•
Run Time Alt
•
Rotate Lead
Содержание Cerus X-Drive
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Страница 3: ...CERUS X DRIVE INSTALLATION AND OPERATION MANUAL Firmware Version 1 1 Franklin Electric Co Inc ...
Страница 94: ...COMMUNICATIONS BACnet Communication 94 ...
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