Lenze DSD - Manual (Page 302)

10 Structure of the drive axis
10.3 Drive concept
302
Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
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Control types
All Lenze inverters are provided with the linear V/f control (VFC) which, however, requires an over-
dimensioning of the inverter with regard to the motor. Moreover, the motor may only be utilised to
approx. 75 % of the rated torque.
Servo Drives 9400 are provided with the special Voltage Vector Control (VVC) motor management
which is suitable for vertical conveyors with encoderless drive systems. This procedure ensures a
motor excitement coordinated to each operating status. For this purpose, the rated output current
of the inverter has to be at least 120 % of the rated motor current.
Suitable control types
• VFCplus with VVC
V/f control with linear V/f characteristic
• VVC: Voltage Vector Control
• VVC is activated via parameters
• Suitable for motor power ≤55 kW
• Contained in Servo Drives 9400
• VFCplus linear
V/f control with linear V/f characteristic
• Suitable for motor power ≤7.5 kW (recommended limit value)
• Contained in all Lenze inverters

Tip!
• Lenze Servo Drives 9400 with VVC are recommendable for vertical conveyors with en-
coderless drive system ≤55 kW.
• Always execute drive systems >55 kW with feedback.
Unsuitable control types
• VFCplus square-law
V/f control with square-law V/f characteristic
• VFCplus eco
Energetically optimised V/F control
• SLVC
Sensorless vector control