Configuration
Function blocks
Internal motor control with vector control (MCTRL2)
8
8.2
8.2.7
8.2-71
EDSVF9333V EN 3.0-06/2005
Whenthe speedfalls belowa settablespeed setpoint threshold, the function
”DC injection braking” is activated.
Note!
Automatic DC-injection braking has priority over quick stop.
Special features of vector control with feedback
ƒ If the DC braking current (C0036) ≤ than the motor magnetising current,
the motor magnetising current is i njected.
ƒ If the DC braking current (C0036) > than the motor magnetising current,
the DC braking current is injected.
Setting
Selection Code Description
DC braking current C0036 DC braking current with which the motor is braked
Speed setpoint threshold C0019 If the values fall below the threshold, DC-injection
braking is released
Hold time C0107 Duration of DC-injection braking. After the hold time,
pulse inhibit is set.
Stop!
An excessive DC braking current and braking time can thermally
overload the motor. Special care m ust be taken when using
self-ventilated motors.
Automatic DC injection
braking
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