Asynchronous Motor Set-Up; Permanent Magnet Motor Set-Up - Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual

Commissioning

5.4.3 Asynchronous Motor Set-up

Enter the motor data in parameter 1-20 Motor Power [kW]
or 1-21 Motor Power [HP] to 1-25 Motor Nominal Speed. 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* Adv. 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
5. 1-30 Stator Resistance (Rs)
Enter line to common stator winding resistance
(R ). If only line-line data are available, divide the
s
line-line value with 2 to achieve the line to
common (starpoint) value.
It is also possible to measure the value with an
ohmmeter, which takes the resistance of the
cable into account. Divide the measured value by
2 and enter the result.
6. 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 with 2 to achieve the line-common
(starpoint) value.
It is also possible to measure the value with an
inductancemeter, which takes the inductance of
MG21B202
Operating Instructions
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.
Parking
This function is the recommended choice for applications
where the motor is rotating at slow speed eg. windmilling
in fan applications. 2-06 Parking Current and 2-07 Parking
Time can be adjusted. Increase the factory setting of these
parameters for applications with high inertia.
Start the motor at nominal speed. If the application does
not run well, check the VVC
dations in different applications can be seen in Table 5.7.
Danfoss A/S © Rev. 2014-01-22 All rights reserved.
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 2 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.
+
PM settings. Recommen-
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