Lenze 9400 Manual de usuario descargar pdf (Pagina 186)

5 Motor interface

5.6 V/f control (VFCplus)

186

Lenze · Servo-Inverter 9400 HighLine · Reference manual · DMS 10.0 EN · 11/2013 · TD05/06

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5.6.1.4 Activating voltage vector control

The Voltage Vector Control (VCC), which can be activated, is an alternative to the voltage boost. The

voltage vector control is used if a high starting torque has to be ensured. The voltage vector control

ensures that the motor current required for this purpose is available in the zero speed range.

The voltage vector control is activated by defining a current setpoint in C00957

and can be

deactivated again by setting "0.0 A".

• The voltage vector control is additive to the voltage boost.

Setting the voltage boost

( 183)

• When the current setpoint is defined, provide a reserve of 20 % to prevent a motor stalling

caused by sudden additional loads.

• Example for starting torque = rated motor torque:

The current setpoint must be parameterised in C00957

to approx. 120 % of the load current.

Setting of the controller parameters

For the gain (C00958

) and the reset time (C00959), accept the values that have been detected for

the current controller gain (C00075

) and reset time (C00076) in the test mode. Optimising the

current controller ( 193)

Since the voltage vector control controls the current value which has a higher background noise due

to its calculation, the reset time might possibly be increased.

Short overview: Parameters for voltage vector control

 Tip!

For controllers with a power > 55 kW we recommend to use the voltage vector control for

horizontal drives for improving the smooth running characteristics.

 Note!

A disadvantage of the voltage vector control is the increased current at low speeds. This

causes higher losses and thus an increased heating of the machine.

Parameter Info Lenze setting

Value Unit

C00957 VFC: VVC current setpoint 0.00 A

C00958

VFC: VVC gain 0.00 V/A

C00959 VFC: VVC reset time 2000.00 ms

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