Lenze 8400 motec User Manual download pdf (Page 111)

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101

Lenze · 8400 motec · Reference manual · DMS 4.1 EN · 08/2013 · TD05 111

5 Motor control (MCTRL)

5.6 V/f characteristic control - energy-saving (VFCplusEco)

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

5.6.4 Optimising the control mode

The V/f characteristic control - energy-saving (VFCplus) is generally ready for operation. It can be

adapted subsequently by adapting the characteristic and/or the drive behaviour.

Adapting characteristic

For the linear characteristic as part of the V/f characteristic control - energy-saving (VFCplusEco), it

is also possible (like in case of the standard V/f characteristic control) to match its curve to different

load profiles or motors by adapting the V/f base frequency (C00015

) and the V

min

boost (C00016).

Adapting the V/f base frequency

( 101)

Adapting the Vmin boost

( 102)

Adapting drive behaviour

• Limitation of the maximum current by a current limitation controller (e.g. to prevent the motor

from stalling or to limit to the maximally permissible motor current).Optimising the Imax

controller ( 103)

• Adaptation of the field frequency by a load-dependent slip compensation (improved speed

accuracy for systems without feedback).

• Improving the behaviour at high dynamic load changes

. ( 112)

• Adapting the slope limitation for lowering the Eco function

. ( 112)

• Optimising the cos/phi controller

. ( 113)

Torque limitation

Limit the torque to a lower value.Torque limitation

( 104)

 Note!

For an adaptation of the V

min

boost, the V/f characteristic control - energy-saving

(VFCplusEco) must not be set. For this purpose, set the V/f characteristic control

(VFCplus).

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