2-01 DC Brake Current
Range:
Function:
50%
*
[0 - 1000 %]
Enter a value for current as a percentage of the rated motor current I
M,N
, see par. 1-24
Motor Current
. 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 par. 2-03
DC Brake
Cut In Speed
; 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 par. 2-02
DC Braking Time
.
NB!
The maximum value depends on the rated motor current.
NB!
Avoid 100 % current for too long. It may damage the motor.
2-02 DC Braking Time
Range:
Function:
10.0s.
*
[0.0 - 60.0 s.]
Set the duration of the DC braking current set in par. 2-01, once activated.
2-03 DC Brake Cut In Speed [RPM]
Range:
Function:
0 RPM
*
[0 - par. 4 -13]
Set the DC brake cut-in speed for activation of the DC braking current set in par. 2-01, upon a stop command.
2-04 DC Brake Cut In Speed [Hz]
Option:
Function:
[0 RPM]
*
0 - par. 4 -14
Set the DC brake cut-in speed for activation of the DC braking current set in par. 2-01, upon a stop command.
2.5.3. 2-1* Brake Energy Funct.
Parameter group for selecting dynamic braking parameters.
2-10 Brake Function
Option:
Function:
[0]
Off
No brake resistor is installed.
[1]
Resistor brake
A brake resistor is incorporated in the system, for dissipation of surplus brake energy as heat. Connecting a
brake resistor allows a higher DC link voltage during braking (generating operation). The Resistor brake function
is only active in frequency converters with an integral dynamic brake.
[2]
AC brake
2-11 Brake Resistor (ohm)
Range:
Function:
Size related [Ohm]
Set the brake resistor value in Ohms. This value is used for monitoring the power to the brake resistor in par.
2-13
Brake Power Monitoring
. This parameter is only active in frequency converters with an integral dynamic
brake.
2-12 Brake Power
Range:
Function:
kW
*
[0.001 - Size related]
Set the monitoring limit of the brake power transmitted to the resistor.
The monitoring limit is a product of the maximum duty cycle (120 sec.) and the maximum power of the brake
resistor at that duty cycle. See the formula below.
2. How to Programme
FC 300 Programming Guide
56
MG.33.M3.02 - VLT
®
is a registered Danfoss trademark
2