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Parameters 429
97
Motor model settings.
,
defines the switching frequency when it is not otherwise being
internally limited.
Note:
This is an expert level parameter and should not be
adjusted without appropriate skill.
4.500 kHz
0.000 …
24.000 kHz
Switching frequency reference.
1000 = 1 kHz
,
defines a minimum switching frequency reference. The actual
switching frequency will not fall below this limit under any
circumstances.
Notes:
• This is an expert level parameter and should not be
adjusted without appropriate skill.
• The drive has internal switching frequency limits that may
override the value entered here.
1.500 kHz
0.000 …
24.000 kHz
Minimum switching frequency.
1000 = 1 kHz
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
(page
Note:
This is an expert level parameter and should not be
adjusted without appropriate skill.
Disabled
Flux braking is disabled.
0
No.
Name/Value
Description
Def
/
FbEq16
Содержание ACS880-x04
Страница 1: ... ABB INDUSTRIAL DRIVES ACS880 primary control program Firmware manual ...
Страница 4: ......
Страница 18: ...18 Using the control panel ...
Страница 24: ...24 Control locations and operating modes ...
Страница 111: ...Application macros 111 Fieldbus control macro This application macro is not supported by the current firmware version ...
Страница 112: ...112 Application macros ...
Страница 496: ...496 Additional parameter data ...
Страница 544: ...544 Fault tracing ...
Страница 602: ...602 Control chain diagrams ...