Delta VFD-ED Series, User Manual

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Ch12 Descriptions of Parameter Settings | VFD-ED
12-64
07 Special Parameters

: You can set this parameter during operation.

Brake Transistor Level
Control Mode VF VFPG SVC FOCPG FOCPM Default: 380.0/760.0
Settings 230V series: 350.0–450.0 V
DC
460V series: 700.0–900.0 V
DC
 Sets the DC bus voltage at which the brake transistor is activated.
Brake Transistor Hysteresis Voltage
Control Mode VF VFPG SVC FOCPG FOCPM Default: 0.0
Settings 0.0–100.0 V
 Used with Pr.07-00 to make the activated voltage level within range in order to prevent the brake resistor
from overheating due to frequent ON/OFF of the brake transistor caused by fluctuated DC bus voltage.

DC Brake Current Level at Start-up
Control Mode VF VFPG SVC Default: 0
Settings 0–100% of the rated current of the motor drive

Sets the level of the DC brake current output to the motor at start-up. When setting the DC brake current,
the rated current (Pr.00-01) is 100%. It is recommended that you start with a low DC brake current level
and then increase until you reach the proper holding torque. However, the DC brake current cannot exceed
the motor’s rated current to prevent the motor from burnout. Therefore, DO NOT use the DC brake for
mechanical retention, otherwise injury or accident may occur.
 When in FOCPG/FOCPM mode, you can enable the DC brake function without setting up this parameter.

DC Brake Activation Time
Control Mode VF VFPG SVC FOCPG FOCPM Default: 0.7
Settings 0.0–60.0 sec.

Sets the length of time that the DC brake current is supplied to motor when activating the drive.

DC Brake Stopping Time
Control Mode
VF VFPG SVC FOCPG FOCPM
Default: 0.7
Settings 0.0–60.0 sec.
 Sets the length of time that the DC brake current is supplied to motor when stopping the drive.