Vector control

4.8 Torque limiting

4.8Torque limiting

Description

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Figure 4-12 Torque limiting

The value specifies the maximum permissible torque whereby different limits can be parameterized for motor and regenerative mode.

p0640[0...n] Current limit

p1520[0...n] CO: Torque limit, upper/motoring

p1521[0...n] CO: Torque limit, lower/regenerative

p1522[0...n] CI: Torque limit, upper/motoring

p1523[0...n] CI: Torque limit, lower/regenerative

p1524[0...n] CO: Torque limit, upper/motoring, scaling

p1525[0...n] CO: Torque limit, lower/regenerating scaling

p1530[0...n] Motor mode power limit

p1531[0...n] Regenerative mode power limit

The current active torque limit values are displayed in the following parameters:

r0067 Maximum drive output current

r1526 Torque limit, upper/motoring without offset

r1527 Torque limit, lower/regenerative without offset

The following limits all apply to the torque setpoint, which is present either at the speed controller output in the case of speed control, or at the torque input in the case of torque control. The minimum/maximum value of the different limits is used in each case. The minimum value is calculated cyclically and displayed in parameters r1538 and r1539.

r1538 CO: Upper effective torque limit

r1539 CO: Lower effective torque limit

These cyclical values therefore limit the torque setpoint at the speed controller output/torque input or indicate the instantaneous max. possible torque. If the torque

132

Drive Functions

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

Page 132
Image 132
Efficient Networks S120 manual Vector control Torque limiting