Configuration
Function blocks
Internal motor control with vector control (MCTRL2)
8
8.2
8.2.7
8.2−58
EDSVF9383V EN 7.1−04/2012
Function procedure
Automatic DC injection braking provides two function procedures, each
with a different reaction of the controller. The parameter setting is identical
for both function procedures.
Function procedure 1:
ƒ After the hold time has elapsed (C0107), the controller automatically
sets pulse inhibit .
0
1
5
2
3
4
C0107
C0036
9300vec090
Fig. 8.2−22 Signal characteristic with automatic DC injection braking
Speed setpoint (e. g. AIN−OUT)
Actual speed value of the motor (e. g. MCTRL−NACT)
Controller output current (e. g. MCTRL−IACT)
Pulse inhibit (e. g. DCTRL−IMP)
DC injection braking is active (MCTRL−GSB−OUT)
MCTRL−GSB−OUT = HIGH: Function is active
MCTRL−GSB−OUT = LOW: Function is not active
The motor rotates with the preset speed. The current adjusts itself as a
function of the load .
With a speed setpoint < speed threshold (C0019), DC injection braking is
activated. Pulse inhibit is set. The motor coasts.
The pulse inhibit is deactivated and the DC braking current set in C0036 is
injected
After the hold time (C0107) pulse inhibit is set
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