Danfoss VLT AutomationDrive FC 301 Programming Manual page 99

VLT AutomationDrive FC 301/302
Programming Guide
Table 129: Choices Depending on Control
VVC+ Speed OL
Flux OL Speed OL
Flux CL Speed CL
Op- Name Description
tion
[0]* Coast Leaves motor in free mode. The motor is disconnected from the drive.
[1] DC hold Energizes the motor with a DC hold current (see parameter 2-00 DC Hold Current).
[2] Motor Checks if a motor has been connected. The interval for checking the motor can be defined in parameter
check
4-49 Motor Check Time Interval.
[3] Premagne- Builds up a magnetic field while the motor is stopped. This allows the motor to produce torque quickly at
tizing subsequent start commands (asynchronous motors only). This premagnetizing function does not help the
st
1 start command. Two different solutions are available to premagnetize the machine for the 1
command:
•
•
Set parameter 1-71 Start Delay to the required premagnetizing time (2–4 rotor time constants). See the
time constants description further in this section. Set parameter 1-72 Start Function to either [0] DC hold or
[1] DC Brake. Set the DC hold or DC brake current magnitude (parameter 2-00 DC Hold Current or parameter
2-01 DC Brake Current) to be equal to I_pre-mag = Unom/(1.73 x Xh).
Sample rotor time constants = (Xh+X2)/(6.3*Freq_nom*Rr)
•
•
•
•
[4] DC voltage
When the motor is stopped, parameter 1-55 U/f Characteristic - U [0] defines the voltage at 0 Hz.
U0
[5] Coast at
When the reference is below parameter 1-81 Min Speed for Function at Stop [RPM], the drive coasts the mo-
low refer- tor.
ence
[6] Motor The drive issues an alarm if 1 or more motor phases are missing.
check,
alarm
[8] Torque
ramp to
zero
This option is only available in FC 302.
When the motor reaches the speed defined in parameter 1-81 Min Speed for Function at Stop [RPM], the
drive ramps the torque down to 0 torque (for example, for extruder applications where a high torque is
present at low speed). The torque ramp time can be set in parameter 1-89 Stop Func Torque Ramp Time.
Danfoss A/S © 2022.12
ASM
All choices
[0],[1],[2],[3],[5],[6]
All choices
Start the drive with a 0 RPM reference and wait 2–4 rotor time constants before increasing the speed
reference.
Use the start delay with DC hold:
1 kW = 0.2 s
10 kW = 0.5 s
100 kW = 1.7 s
1000 kW = 2.5 s
SPM IPM
[0],[1],[5] [0],[1],[5]
[0],[1],[5] [0],[1],[5]
[0],[1],[5],[8] [0],[1],[5],[8]
N O T I C E
AU275636650261en-000101 / 130R0334 | 99
Parameter Descriptions
SynRM
[0],[1],[5]
–
–
st
start