Danfoss iC7 Motion Series Application Manual page 197

Application Guide | iC7 Series Motion
Duration for which the DC brake is active for a DC-braking current injection with parameter 5.7.2.1 DC-Brake Time.
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The following illustration shows a DC-braking scenario.
DC Brake Current %
Current
Speed
Frequency
Run Request
Motor control
Figure 80: DC Braking and DC Stop
DC stop and stop delay
Besides the DC brake, the application software allows the configuring of DC stop, which can be used for DC hold or magnetization
purposes. DC stop is configured with parameters 5.7.2.5 DC Stop Current % and 5.7.2.4 DC Stop Time. By default, DC stop is disabled and
the parameter 5.7.2.4 DC Stop Time is set to 0.
DC stop is always applied at zero speed and as the last activity before the drive begins to coast.
Speed
Run Request
Figure 81: DC Stop and Stop Delay
When both parameters 5.7.1.1 Stop Zero Speed Time and 5.7.2.4 DC Stop Time are set to -1, then the parameter 5.7.1.1 Stop Zero Speed
Time has priority.
To introduce stop delay, use parameter 5.7.1.1 Stop Zero Speed Time. By default, stop delay is disabled and parameter 5.7.1.1 Stop
Zero Speed Time is set to 0. The parameter defines the duration from reaching 0 speed to the time when the drive stops modulating or
continues with DC stop. During the stop delay duration, the drive remains in run mode, modulates, and reacts to load changes.
Note:
When the drive is configured for DC braking, the parameter 5.7.1.1 Stop Zero Speed Time has no effect.
© 2023.11
DC Stop
Current %
DC Brake
DC Brake Time
DC Stop Time
DC stator current control
Current
Stop Zero
Speed Time
Flux control
Time
0
DC Stop
Current %
DC Stop
Time
DC stator current control
AB318753549016en-000301 / 136R0284 |
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