Xylem IM255 AQUAVAR Intelligent Pump Controller - Manual (Page 98)

WARNING:
WINDMILLING! Unintended rotation of permanent magnet motors causes a risk of
personal injuty and equipment damage. Ensure permanent magnet motors are blocked
to prevent unintended rotation.
Initial programming steps
1. Activate PM motor operation 1–10 Motor Construction, select [1] PM, non salient SPM
2. Make sure to 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 information can be found on the motor nameplate and in the motor data sheet.
The following parameters must be programmed 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)
a. Enter line to common stator winding resistance (Rs). If only line-line data are
available, divide the line-line value with 2 to achieve the line to common
(starpoint) value.
b. 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.
6. 1–37 d-axis Inductance (Ld)
a. Enter line to common direct axis inductance of the PM motor.
b. If only line-line data are available, divide the line-line value with 2 to achieve the
line-common (starpoint) value.
c. 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.
7. 1–40 Back EMF at 1000 RPM
a. 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.
Test motor operation
1. Start the motor at low speed (100 to 200 RPM). If the motor does not turn, check
installation, general programming and motor data.
2. Check if start function in 1–70 PM Start Mode fits the application requirements.
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
Operation
96 Aquavar ® Intelligent Pump Controller INSTRUCTION MANUAL