Lenze DSD Bedienungsanleitung PDF herunterladen (Seite 354)

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101

11 Drive Dimensioning

11.6 Inverters

354

Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23

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11.6.2.4 Motor control

11.6.2.5 Control system

Symbol Description

Motor control Type of motor control

• Some frequency inverters provide the possibility of using a speed feedback (with or without

feedback system).

• In the case of servo inverters a speed feedback always has to be available (with feedback sys-

tem).

Symbol Description

Control system SC Servo control

Field-oriented control with current model.

• Division of the motor current into field current and torque generating cur-

rent.

• Feedback required!

VFCplus V/f control

Simple voltage activation with linear characteristic.

• Not suitable for hoist drives >7.5 kW!

• An optimal torque utilisation is achieved with feedback.

SLVC Sensorless vector control

Voltage implanting motor control via motor model.

• No feedback required.

• Features a high overload capacity.

VFCplus eco V/f control with energetically optimised field injection in partial load operation-

al range.

 Note!

For applications on an inclined plane with a max. required power > 7.5 kW, operation

with VFCplus is not recommended because of the increased required power within low-

ering operation (high motor excitation)!

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