Efficient Networks S120 manual Servo control Motor data identification

Servo control

3.12 Motor data identification

3.12Motor data identification

Description

The motor data identification (MotID) is used as tool to determine the motor data, e.g. of third-party motors and can help to improve the torque accuracy (kT estimator). The drive system must have been commissioned for the first time as basis for using MotID. To do this, either the electrical motor data (motor data sheet) or the rating plate data must be entered and the calculation of the motor/control parameters (p0340) must have been completed.

Commissioning involves the following steps:

●Enter the motor data or the rating plate data and the encoder data

●Complete calculation of the motor and control data as starting value for the MotID (p0340 = 3, if motor data, p0340 = 1, if rating plate data were entered)

●Carry-out a static measurement (p1910)

●For synchronous motors: Carry-out an angular commutation calibration (p1990) and if required, fine synchronization (refer to r1992)

●Carry-out a rotating measurement (p1960)

Before starting the rotating measurement, the speed controller setting should be checked and optimized (p1460, p1462 and p1470, p1472).

It is preferable if the rotating MotID is carried-out with the motor de-coupled from the mechanical system. This therefore means that only the motor moment of inertia is determined. The total moment of inertia with mechanical system can be subsequently identified with p1959 = 4 and p1960 = 1. The stress on the mechanical system can be reduced by parameterizing the ramp-up time (p1958) and/or using a speed limit (p1959.14/p1959.15) or using the current and speed limit. The higher the selected ramp- up time, the less accurate the moment of inertia determined.

Note

Completion of the individual identification runs can be read via parameters r3925 to r3928.

The enable signals OFF1, OFF2, OFF3 and "enable operation" remain effective and can be interrupt the motor identification routine.

If there is an extended setpoint channel (r0108.08 = 1), parameters p1959.14 = 0 and p1959.15 = 0 and a direction of rotation limit (p1110 or p1111) is active there, then this is observed at the instant of the start via p1960. For p1958 = -1, the ramp-up and ramp-down time of the setpoint channel (p1120 and p1121) are also used for the MotID.

Note

If a ramp-up/ramp-down time or one direction of rotation limit is activated, parts of the motor data identification routine cannot be carried-out. For other parts of the motor data identification routine, the accuracy of the results is diminished because a ramp-up/ramp- down time is selected. If possible, p1958 should be 0 and no direction of rotation limit selected (p1959.14 = 1 and p1959.15 = 1).

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