3.4 Main Menu - Brakes - Group 2
3.4.1 2-0* DC-Brakes
Parameter group for configuring the DC brake and DC
hold functions.
2-00 DC Hold/Preheat Current
Range:
Function:
50 %
*
[ 0 -
160. %]
Enter a value for holding current as a
percentage of the rated motor current I
M,N
set
in
. 100% DC holding
current corresponds to I
M,N
.
This parameter holds the motor (holding
torque) or pre-heats the motor.
This parameter is active if [1] DC hold/Preheat
is selected in
.
NOTE
will not have effect when
= [1] PM, non salient SPM.
NOTE
The maximum value depends on the rated motor current.
Avoid 100 % current for too long. It may damage the
motor.
2-01 DC Brake Current
Range:
Function:
50.0
%
*
[ 0 -
1000.
%]
Enter a value for current as a percentage of the
rated motor current I
M,N
, see
100% DC braking current corresponds to I
M,N
.
DC brake current is applied on a stop command,
when the speed is lower than the limit set in
2-03 DC Brake Cut In Speed [RPM]
; when the DC
Brake Inverse function is active; or via the serial
communication port. The braking current is
active during the time period set in
.
The value range and function depends on
[0] Asynchron: [0-1000%]
Enter a value for current as a percentage of the
rated motor current IM,N, see
100% DC braking current corresponds to IM,N.
DC brake current is applied on a stop command,
when the speed is lower than the limit set in
2-03 DC Brake Cut In Speed [RPM]
[RPM]; when
the DC Brake Inverse function is active; or via the
serial communication port.
[1] PM non salient: [0-100%]
There are two options:
•
Set a value of “0%” to enable the PM
flystart speed estimation below the
2-01 DC Brake Current
Range:
Function:
speed limit set in
.
•
Set a value higher than “0%” (of the
rated motor current IM,N, see
) to enable the
flystart “parking” function via DC Brake.
DC Brake (“parking”) will then be active
whenever the estimated motor speed is
lower than the value set in
.
The braking current is active during the time
period set in
.
NOTE
The maximum value depends on the rated motor current.
Avoid 100 % current for too long. It may damage the
motor.
2-02 DC Braking Time
Range:
Function:
10.0 s
*
[0.0 - 60.0 s] Set the duration of the DC braking
current set in
, once
activated.
2-03 DC Brake Cut In Speed [RPM]
Range:
Function:
Size related
*
[ 0 - 0.
RPM]
Set the DC brake cut-in speed for
activation of the DC braking current
set in
, upon a
stop command.
When
is set to
[1] PM non salient SPM this value is
limited to 0 rpm (OFF)
NOTE
2-03 DC Brake Cut In Speed [RPM]
will not have effect when
= [1] PM, non salient SPM.
2-04 DC Brake Cut In Speed [Hz]
Range:
Function:
Size related
*
[ 0.0 - 0.0
Hz]
This parameter is for setting the DC
brake cut in speed at which the DC
braking current (
) is to be active, in connection
with a stop command.
NOTE
will not have effect when
= [1] PM,
non salient SPM.
Parameter Description
VLT
®
HVAC Drive Programming Guide
MG.11.CC.02 - VLT
®
is a registered Danfoss trademark
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