In many applications, it is required to extend the velocity range of an electric motor.
This parameter enables or disables “Field Weakening”, a feature that increases the speed range of a PM
motor by weakening the magnetic field of the rotor linearly over the speed range.
The user should set 3 parameters:
1. Field Weakening Starting Speed (Subitem 6)
2. Field Weakening Ending Speed (Subitem7)
3. Percentage of Field Weakening (f) (Subitem 5)
Note:
While the field weakening feature is enabled, it is assumed that the Drive is in its normal conditions with no
fault.
Name Index:Sub Type Bit
Size
Min
Data
Max
Data
Default
Data
Unit Access PDO
Mapping
Field weakening
percentage
0x2010:5 UDINT 32 0 100 0 readwrite
Percentage of Field weakening. This field can have an integer value in the range of [0-100], and determines
the "RMS" value of phase currents which are (only) generated to weaken the field. For example, if set to 10,
then 10% of rated current will be injected in motor phases to weaken the rotor field. WARNING: Based on
motor type, values more than 25% can lead to instability of torque control service. While tuning, proceed
with "small steps", "limited power supply voltage" and "limited power supply current".
Name Index:Sub Type Bit
Size
Min
Data
Max
Data
Default
Data
Unit Access PDO
Mapping
Field weakening
starting speed
0x2010:6 UDINT 32 0 50000 0 rpm readwrite
Field weakening is increased linearly from 0% (at starting speed point) to its final value (at ending speed
point).
Name Index:Sub Type Bit
Size
Min
Data
Max
Data
Default
Data
Unit Access PDO
Mapping
Field weakening
ending speed
0x2010:7 UDINT 32 0 50000 0 rpm readwrite
Field weakening is increased linearly from 0% (at starting speed point) to its final value (at ending speed
point).
Name Index:Sub Type Bit
Size
Min
Data
Max
Data
Default
Data
Unit Access PDO
Mapping
Commutation
angle
measurement
delay
0x2010:8 UDINT 32 0 μs readwrite
Name Index:Sub Type Bit
Size
Options Unit Access PDO
Mapping
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