Configuration
Function blocks
Internal motor control with vector control (MCTRL2)
8
8.2
8.2.7
8.2−59
EDSVF9383V EN 7.1−04/2012
Function procedure 2:
ƒ If you define a speed setpoint > speed threshold (C0019) before the
hold time elapses, DC−injection braking is deactivated and the drive
follows the speed setpoint. If the speed falls below the threshold again,
DC−injection braking is reactivated and the hold time is restarted.
0
1
5
2
3
4
C0036
C0019
9300vec091
Fig. 8.2−23 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
DC−injection braking is deactivated as soon as the speed setpoint exceeds
the speed threshold (C0019). The motor is accelerated to the defined speed
setpoint and kept there.
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