Op-
tion
Name
Description
[0]*
Constant
torque
Motor shaft output provides constant torque under variable speed control.
[1]
Variable
torque
Motor shaft output provides variable torque under variable speed control. Set the variable torque level in
parameter 14-40 VT Level
.
[2]
Auto en-
ergy op-
tim.
Automatically optimizes energy consumption by minimizing magnetization and frequency via
parameter
14-41 AEO Minimum Magnetisation
and
parameter 14-42 Minimum AEO Frequency
.
[5]
Costant
power
The function provides a constant power in the field weakening area. The torque shape of motor mode is
used as a limit in the generator mode. This is done to limit the power in generator mode that otherwise
becomes considerably larger than in motor mode, due to the high DC-link voltage available in generator
mode.
P
shaft
W
=
ω
mech
rad/
s
×
T
Nm
ω
nom
2ω
nom
ω [rad/S]
P[W]
e3
0b
b6
55
.1
1
T[Nm]
P
T
P
nom
T
nom
Illustration 27: Relationship with Constant Power
Parameter 1-04 Overload Mode
Table 64: Parameter 1-04 Overload Mode
1-04 Overload Mode
Default value: Size related
Parameter type: Option
Setup: All setups
Conversion index: –
Data type: Uint8
Change during operation: False
N O T I C E
This parameter cannot be adjusted while the motor is running.
Use this parameter to configure the drive for either high or normal overload. When selecting the drive size, always review the tech-
nical data in the Operating Guide or the Design Guide to know the available output current.
Option
Name
Description
[0]
High torque
Allows up to 160% overtorque.
[1]
Normal torque
For oversized motor. Allows up to 110% overtorque.
AU373327181955en-000101 / 130R1208 | 59
Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide
