Asynchronous Motor Set-Up; Permanent Magnet Motor Set-Up - Danfoss VLT FC 102 Instruction Manual

Commissioning
12. 3-41 Ramp 1 Ramp-up Time
13. 3-42 Ramp 1 Ramp-down Time
14. 3-13 Reference Site. Linked to Hand/Auto Local
Remote.

5.4.3 Asynchronous Motor Set-up

Enter the motor data in parameters 1-20 or 1-21 to 1-25. The
information can be found on the motor nameplate.
1. 1-20 Motor Power [kW] or 1-21 Motor Power [HP]
2. 1-22 Motor Voltage
3. 1-23 Motor Frequency
4. 1-24 Motor Current
5. 1-25 Motor Nominal Speed

5.4.4 Permanent Magnet Motor Set-up

NOTICE!
Only use permanent magnet (PM)
motor with fans and pumps.
Initial Programming Steps
1. Activate PM motor operation 1-10 Motor
Construction, select [1] PM, non salient SPM
2. Set 0-02 Motor Speed Unit to [0] RPM
Programming motor data
After selecting PM motor in 1-10 Motor Construction, the PM
motor-related parameters in parameter groups 1-2* Motor
Data, 1-3* Addl. Motor Data and 1-4* are active.
The necessary data can be found on the motor nameplate
and in the motor data sheet.
Program the following parameters in the listed order
1. 1-24 Motor Current
2. 1-26 Motor Cont. Rated Torque
3. 1-25 Motor Nominal Speed
4. 1-39 Motor Poles
®
VLT HVAC Drive Instruction Manual
5.
6.
7.
Test Motor Operation
1.
2.
Rotor detection
This function is the recommended choice for applications
where the motor starts from standstill, e.g., pumps or
conveyors. On some motors, an acoustic sound is heard
when the impulse is sent out. This does not harm the motor.
MG11AJ22 - Rev. 2013-09-13
1-30 Stator Resistance (Rs)
Enter line to common stator winding resistance (Rs).
If only line-line data are available, divide the line-
line value by 2 to achieve the line to common
(starpoint) value.
It is also possible to measure the value with an
ohmmeter, which will also take the resistance of the
cable into account. Divide the measured value by 2
and enter the result.
1-37 d-axis Inductance (Ld)
Enter line to common direct axis inductance of the
PM motor.
If only line-line data are available, divide the line-
line value by 2 to achieve the line-common
(starpoint) value.
It is also possible to measure the value with an
inductance meter, which will also take the
inductance of the cable into account. Divide the
measured value by 2 and enter the result.
1-40 Back EMF at 1000 RPM
Enter line-to-line back EMF of PM Motor at 1000
RPM mechanical speed (RMS value). Back EMF is the
voltage generated by a PM motor when no drive is
connected and the shaft is turned externally. Back
EMF is normally specified for nominal motor speed
or for 1000 RPM measured between two lines. If the
value is not available for a motor speed of 1000
RPM, calculate the correct value as follows: If back
EMF is, e.g., 320 V at 1800 RPM, it can be calculated
at 1000 RPM as follows: Back EMF = (Voltage /
RPM)*1000 = (320/1800)*1000 = 178. This is the
value that must be programmed for 1-40 Back EMF
at 1000 RPM.
Start the motor at low speed (100 to 200 RPM). If
the motor does not turn, check installation, general
programming and motor data.
Check if start function in 1-70 PM Start Mode fits the
application requirements.
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