Brake Energy Funct.; Dc Braking Time; Dc Brake Cut In Speed [Rpm]; Dc Brake Cut In Speed [Hz] - Danfoss VLT Programming Manual

3 Parameter Description
NB!
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:
3
10.0 s* [0.0 - 60.0 s]

2-03 DC Brake Cut In Speed [RPM]

Range:
Application [Application dependant]
dependent*

2-04 DC Brake Cut In Speed [Hz]

Range:
Application [Application dependant]
dependent*

3.4.2 2-1* Brake Energy Funct.

Parameter group for selecting dynamic braking parameters. Only valid for drives with brake chopper.
2-10 Brake Function
Option:
[0] * Off
[1] Resistor brake
[2] AC brake
2-11 Brake Resistor (ohm)
Range:
Application [Application dependant]
dependent*
2-12 Brake Power Limit (kW)
Range:
Application [Application dependant]
dependent*
For 200 - 240 V units:
For 380 - 480 V units
For 380 - 500 V units
For 575 - 600 V units
60
Function:
Set the duration of the DC braking current set in par. 2-01
Function:
Set the DC brake cut-in speed for activation of the DC braking current set in par. 2-01
Current
, upon a stop command.
Function:
This parameter is for setting the DC brake cut in speed at which the DC braking current (par. 2-01)
is to be active, in connection with a stop command.
Function:
No brake resistor installed.
Brake resistor incorporated in the system, for dissipation of surplus brake energy as heat. Connect-
ing 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.
AC Brake will only work in Compressor Torque mode in par. 1-03
Function:
Set the brake resistor value in Ohms. This value is used for monitoring the power to the brake
Brake Power Monitoring
resistor in par. 2-13
with an integral dynamic brake.
Use this parameter for values without decimals. For a selection with two decimals, use
Brake Resistor (ohm)
par. 30-81
Function:
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.
390 2 ×
dutytime
P resistor
=
R
× 120
778 2 ×
dutytime
P resistor
=
R
× 120
810 2 ×
dutytime
P resistor =
R × 120
943 2 ×
dutytime
P resistor
=
R
× 120
MG.11.C9.02 - VLT
®
VLT
DC Brake Current
. This parameter is only active in frequency converters
.
® is a registered Danfoss trademark
HVAC Drive Programming Guide
, once activated.
DC Brake
Torque Characteristics
.