Lenze E84DSxxx - Manual (Page 142)

5 Motor control (MCTRL)
5.6 Sensorless vector control (SLVC)
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Lenze · 8400 protec StateLine · Reference manual · DMS 4.2 EN · 03/2013 · TD05
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5.6.4 Optimising the control mode
5.6.4.1 Optimising the starting performance after a controller enable
After the controller has been enabled, the starting action of the motor is delayed due to the
magnetisation of the motor. Under consideration of the motor rotor time constant ( C00083 ), the
time delay is calculated as follows:
Magnetisation = 1.5 * motor rotor time constant
If this delay cannot be tolerated for specific applications, the motor must always be operated in an
energised condition. For this, select one of the following options:
Procedure without setting a controller inhibit
1. Deactivate the auto DCB function with C00019 = 0.
2. Do not activate the controller inhibit. Instead, stop the drive by selecting a setpoint of 0 or by
activating the quick stop function.
Procedure with setting a controller inhibit due to application requirements
1. Deactivate the auto DCB function with C00019 = 0.
2. Enter a greater value for the motor rotor resistance (max. factor 2!) to reduce the magnetisation
time in C00082 .

Note!
During the starting action, a jerk may occur in the machine due to the temporarily
increased motor current!