Lenze i700 - Manual (Page 140)

5 Motor control & motor settings
5.14 Parameterising the V/f characteristic control
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Lenze · i700 servo inverter · Reference manual · DMS 1.5 EN · 03/2014 · TD05
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5.14.2 Activating the voltage vector control (lmin controller)
The voltage vector control that can be activated is used if a comparatively high starting torque has
to be ensured. The voltage vector control makes sure that the motor current required is kept at
smaller speeds in the speed range.
• The voltage vector control is activated by the selection of a current setpoint.
• For the automatic calculation of the control parameters, the "Calculate Imin controller" function
is provided via object 0x2822 (or 0x3022 for axis B).
0x2B04 | 0x3304 - VFC: Voltage vector control - setpoint current
0x2B05 | 0x3305 - VFC: Voltage vector control parameter

Note!
The voltage vector control acts additively to the voltage boost .
• Only use one of the two "Boost" functions.
Recommendation: voltage vector control
If the voltage vector control is used, greater losses and therefore an increased heating of
the motor result from the increased current at low speeds.
Current setpoint for voltage vector control
• If "0.00 A" are set, the voltage vector control is deactivated.
• 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 set to approx. 120 % of the load current.
Setting range (min. value | unit | max. value) Lenze setting
0.00 A 500.00 0.00 A
 Write access  CINH  OSC  P  RX  TX Scaling: 1/100 UNSIGNED_32
Sub. Name Lenze setting Data type
 1 VFC: Voltage vector controller - gain 148.21 V/A UNSIGNED_32
 2 VFC: Voltage vector controller - reset time 3.77 ms UNSIGNED_32
Subindex 1: VFC: Voltage vector controller - gain
Gain for voltage vector control
Setting range
(min. value | unit | max. value) Lenze setting
0.00 V/A 750.00 148.21 V/A
 Write access  CINH  OSC  P  RX  TX Scaling: 1/100 UNSIGNED_32