
Parameters 281
Defines the minimum allowed voltage reserve. When
the voltage reserve has decreased to the set value,
the drive enters the field weakening area.
Note:
This is an expert level parameter and should not
be adjusted without appropriate skill.
If the intermediate circuit DC voltage
U
dc
= 550 V and
the voltage reserve is 5%, the RMS value of the
maximum output voltage in steady-state operation is
0.95 × 550 V / sqrt(2) = 369 V
The dynamic performance of the motor control in the
field weakening area can be improved by increasing
the voltage reserve value, but the drive enters the
field weakening area earlier.
-2%
-5…50%
Voltage reserve. Setting voltage reserve to -5…-4%
will enable full output voltage (motor voltage =
network voltage at rated frequency). This will increase
the current harmonics to the motor and might lead to
motor heating.
1 = 1%
Defines the level of flux braking power. (Other
stopping and braking modes can be configured in
parameter group
Note:
This is an expert level parameter and should not
be adjusted without appropriate skill.
Disabled
Flux braking is disabled.
0
Moderate
Flux level is limited during the braking. Deceleration
time is longer compared to full braking.
1
Full
Maximum braking power. Almost all available current
is used to convert the mechanical braking energy to
thermal energy in the motor.
WARNING!
Using full flux braking heats up the
motor especially in cyclic operation. Make sure
that the motor can withstand this if you have a
cyclic application.
2
Defines the source of flux reference.
Notes:
• This is an expert level parameter and should not be
adjusted without appropriate skill.
• Do not use this parameter in scalar control mode, if
the parameter
is set to
.
Zero
0
User flux reference
Parameter
.
1
-
Defines the flux reference when parameter
Note:
• ABB recommends the range of 20.00%...120.00%.
100.00%
0.00...200.00%
User-defined flux reference.
100 = 1%
No.
Name/Value
Description
Default
FbEq 16
Summary of Contents for ACS280
Page 1: ... ABB MACHINERY DRIVES ACS280 coldplate drives Firmware manual ...
Page 4: ......
Page 10: ...10 ...
Page 16: ...16 Control panel ...
Page 20: ...20 Start up ID run and use ...
Page 24: ...24 Default control connection ...
Page 88: ...88 Program features ...
Page 298: ...298 Parameters ...