Efficient Networks S120 manual 151

Vector control 4.15 Instructions for commissioning permanent-magnet synchronous motors

Note

If pulse inhibition of the converter occurs (fault or OFF2), synchronous motors can generate high terminal voltages in the field weakening range, which could lead to overvoltage in the DC link. The following possibilities exist to protect the drive system from being destroyed due to overvoltage:

1.Restrict (p0643 = 0) maximum speed (p1082)

2.External voltage limiter or chopper or other measures appropriate to the application.

CAUTION

With p0643 = 1, it must be ensured that there is sufficiently high and suitable overvoltage protection. If necessary, system-side precautions should be taken.

●Depending on the terminal voltage and load cycle, the maximum torque can be taken from the motor data sheets / project design instructions.

Commissioning

We recommend the following points when commissioning:

●Commissioning Wizard in STARTER

The motor identification routine and the "rotating measurement" (p1900) can be activated from the commissioning Wizard in STARTER. The encoder adjustment (p1990) is automatically activated together with the motor identification routine.

●Motor identification (standstill (static) measurement (p1910)

●Encoder adjustment (p1990)

WARNING

During initial commissioning and when the encoder is replaced, the encoder must be adjusted (p1990).

● Rotating measurement (p1960)

The following parameters can be entered in STARTER during the commissioning phase:

The optional motor data can be entered if it is known. Otherwise, they are estimated using the rating plate data or are determined using a motor identification routine or speed controller optimization.

Drive Functions	151
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4