Delta VFD300C43S-HS User Manual page 392

Chapter 12 Description of Parameter SettingsC2000-HS
07 Special Parameters
Software Brake Level

Settings
DC Brake Current Level

Settings
 Sets the level of the DC brake current output to the motor during start-up and stop. When you set
the DC brake current percentage, the rated current is regarded as 100%. Start with a low DC
brake current level, and increase it slowly until the proper brake torque is reached. However, to
avoid burning the motor, the DC brake current CANNOT exceed the rated current. Therefore, DO
NOT use the DC brake for mechanical retention, otherwise injury or accident may occur.
 The PM has the magnetic field itself, using the DC brake may possibly cause the motor run in a
reverse direction, therefore, it is not recommended to use DC brake for PM.
DC Brake Time at RUN

Settings
 The motor may continue rotating after the drive stops output due to external forces or the inertia
of the motor itself. If you use the drive with the motor rotating, it may cause motor damage or
trigger drive protection due to over-current. This parameter outputs DC current, generating torque
to force the motor stop to get a stable start before motor operation. This parameter determines
the duration of the DC brake current output to the motor when the drive starts up. Setting this
parameter to 0.0 disables the DC brake at start-up.
 The PM has the magnetic field itself, using the DC brake may possibly cause the motor run in a
reverse direction, therefore, it is not recommended to use DC brake for PM. Use Pr. 10-49 zero
voltage command to force the motor decelerate or to stop.
DC Brake Time at STOP

Settings
 The motor may continue rotating after the drive stops output due to external forces or the inertia
of the motor itself. This parameter outputs DC current, generating torque to force the drive stop
after the drive stops output to make sure that the motor stops.
 This parameter determines the duration of the DC brake current output to the motor when braking.
To enable DC brake at STOP, set Pr. 00-22 (Stop Method) to 0 (ramp to stop). The DC brake is
invalid when Pr. 07-03 is set to 0.0.
 Related parameters: Pr. 00-22 Stop Method, Pr. 07-04 DC Brake Frequency at STOP.
700.0–900.0 V
DC
0–100%
0.0–60.0 sec.
0.0–60.0 sec.
12.1-07-1
 This parameter can be set during operation.
Default: 740.0
Default: 0
Default: 0.0
Default: 0.0