302 Parameters
97
Motor model settings.
Defines the slip gain which is used to improve the estimated
motor slip. 100% means full slip gain; 0% means no slip gain.
The default value is 100%. Other values can be used if a
static speed error is detected despite having the setting at full
slip gain.
Example
(with nominal load and nominal slip of 40 rpm): A
1000 rpm constant speed reference is given to the drive.
Despite having full slip gain (= 100%), a manual tachometer
measurement from the motor axis gives a speed value of 998
rpm. The static speed error is 1000 rpm - 998 rpm = 2 rpm. To
compensate the error, the slip gain should be increased to
105% (2 rpm / 40 rpm = 5%).
100%
0 … 200%
Slip gain.
1 = 1%
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%
-4 … 50%
Voltage reserve.
1 = 1%
Defines the level of flux braking power. (Other stopping and
braking modes can be configured in parameter group
See section
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.
2
Defines the source of flux reference.
Note:
This is an expert level parameter and should not be
adjusted without appropriate skill.
Zero
None.
0
User flux reference
.
1
-
Defines the flux reference when parameter
is set to
.
100.00%
0.00 … 200.00%
User-defined flux reference.
100 = 1%
No.
Name/Value
Description
Def
/
FbEq16
Summary of Contents for ACS860
Page 1: ... ABB INDUSTRIAL DRIVES ACS860 primary control program Firmware manual ...
Page 4: ......
Page 10: ...10 Table of contents ...
Page 18: ...18 Using the control panel ...
Page 24: ...24 Control locations and operating modes ...
Page 54: ...54 Program features ...
Page 78: ...78 Program features ...
Page 90: ...90 Application macros ...
Page 342: ...342 Additional parameter data ...
Page 380: ...380 Fault tracing ...
Page 381: ...Fault tracing 381 ...
Page 382: ...382 Fault tracing ...
Page 436: ...436 Control chain diagrams ...