Franklin Electric Cerus X-Drive, Installation And Operation Manual

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ADVANCED APPLICATION OPTIONS
Operation with Permanent Magnet Motors
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Setup MagForce Pump Motor
Franklin Electric MagForce motors use an internal permanent magnet motor (IPM) design with 4-pole con -
struction and synchronous speed. This means the electrical frequency is the same speed as the shaft speed
with no slip in the rotor. Since the motor has 4 poles, the electrical frequency running the motor will need to
be twice that of a 2-pole motor for same desired RPM.
MagForce motors are rated to operate up to 3600 RPM in North America or
3000 RPM in the EU, and not to exceed the maximum SFA rating of the
motor. To run pumps at their rated speed, use the pump RPM calculation
“Poles x RPM / 120 = Electrical Frequency (Hz)” in order to set the
VFD Max
Freq [VFD–00] .
Use the following steps to configure an X-Drive for use with a MagForce:
Basic Setup
IMPORTANT: If the VFD has been used in a previous application, the drive parameters should be completely
reset using Parameter Reset [ADV–03] , option 4_Reset all Param .
1. Application [SET–00]: Set to option 9_MagForce. This selection assumes the use of a 4-pole, 3-phase
PM motor running at 120 Hz and automatically updates all relevant parameters to the proper defaults.
IMPORTANT: The MagForce application should ONLY be used with Franklin Electric MagForce motors.
Do NOT use this selection with other permanent magnet motors.
2. Input Phase [SET–01]: Verify that the setting matches the
type of power supply— 3-phase (default).
3. Motor Horsepower [SET–02]: Enter the maximum rated
horsepower from the motor nameplate.
4. Motor FLA (SFA) [SET–03]: Set to the current rating on the
nameplate associated with the power rating of the pump.
5. Motor RPM [SET–04]: Enter the rated motor RPM from the
motor nameplate.
6. Motor Voltage [SET–05]: Enter the rated voltage from the
motor nameplate.
7. VFD Max Freq [VFD–00]: The highest frequency allow -
able. This should be set to the calculated electrical fre -
quency corresponding to the target pump RPM in the table
above.
8. VFD Base Freq [VFD–02]: This should be set to the motor nameplate frequency rating.
9. Carrier Freq [SET–06]: This should be set to 4 kHz for sine filters and 2 kHz for dV/dt filters.
Permanent Magnet Specific Parameters
For MagForce applications, the drive automatically sets:
•
Control Method [Motor–05]: This should be
2_Sensorless
Vector Control.
• Motor Type [Motor–06]: This should be 2_PM-IPM .
• PM Poles [Motor–07]: This should be
4
for a MagForce motor.
• PM Inertia [Motor–08]: This value is automatically calculated.
Pump RPM Electrical Frequency
3600 4 x 3600 / 120 = 120 Hz
3450 4 x 3450 / 120 = 115 Hz
3525 4 x 3525 / 120 = 117.5 Hz
3000 4 x 3000 / 120 = 100 Hz
2850 4 x 2850 / 120 = 95 Hz
2938 4 x 2938 / 120 = 98 Hz
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