The function is defined by parameters dr13 and dr25.
Breakdown torque at start of field weakening
The breakdown torque in % of the rated torque is entered in dr13 breakdown
torque %. 100% can always be entered in dr25 for an asynchronous motor.
Example: Parameterization of dr13 and dr25 for an asynchronous motor
Reference-DC link voltage
The field weakening shall start at this frequency => dr25 = 100%
6.2.10.5.2 Synchronous motor
Theoretically, the maximum torque must decrease at sufficient high current in the
d-axis according 1/x characteristic.
Adjusts itself automatically depending on the
selected motor type
This means: ds11 torque mode Bit 0/1 field weak curve limit must be set to 0: 1/x.
A 1/x function is defined by specifying a single point which is passed through. This
point is determined by parameters dr13 and dr25.
Torque and speed for the definition of the limiting
characteristic
dr25 defines the speed and dr13 defines the limit characteristic (max.) torque
which is appropriate to this speed.)
The torque value is entered in dr13 breakdown torque % in % of the motor rated
torque.
The speed value is entered in dr25 breakdown speed % in % of the rated field
weakening speed . This is calculated as follows:
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