Function library
Selection of control mode, optimisation of operating behaviour
7−8
L
EDB82MV752 EN 5.2
7.1.2 Vector control
Description
Compared with the V/f characteristic control the vector control offers considerably higher torque
and lower current consumption during idle running. The vector control is an improved motor current
control following the Lenze FTC technology. Select vector control for operation of the following
drives:
Single drives with extremely changing loads
Single drives with heavy start conditions
Sensorless speed control of standard three−phase AC motors
) Note!
l The connected motor should maximally be two power classes lower than the
motor assigned to the controller.
l The operation with vector control is not possible if several drives are operated on
one controller.
l The motor parameter identification is absolutely vital! Otherwise commissioning
is not possible.
Codes for parameter setting
Code Possible settings IMPORTANT
No. Name Lenze Selection
C0014
Operating mode 2
2 V/f characteristic control V ~ f
(linear characteristic with constant V
min
boost)
Commissioning is possible without
identifying motor parameters
Advantage of identification with C0148:
– Improved smooth running at low
speeds
– V/f rated frequency (C0015) and slip
(C0021) are calculated and saved.
They must not be entered
7−2
3 V/f characteristic control V ~ f
2
(square−law characteristic with constant V
min
boost)
4 Vector control
In case of the first selection enter the
motor data and identify them with
C0148
Otherwise, commissioning is not
possible
When C0014 = 5, C0019 must be set = 0
(automatic DC injection brake is
deactivated)
5 Sensorless torque control with speed limitation
Torque setpoint via C0412/6
Speed limitation via setpoint 1 (NSET1−N1) if
C0412/1 is assigned, otherwise via maximum
frequency (C0011)
C0015
uSEr
V/f rated frequency 50.00 7.50 {0.02 Hz} 960.00 C0015 is calculated and stored under
C0148 when the motor parameters are
identified
Setting applies to all mains voltages
permitted
7−4
7−8
C0021 Slip compensation 0.0 −50.0 {0.1 %} 50.0 C0021 is calculated and stored under
C0148 when the motor parameters are
identified
7−13
C0054* Apparent motor
current
(MCTRL1−IMOT)
0.0 {A} 2000.0 Only display
C0087 Rated motor speed à 300 {1 rpm} 16000 à Depending on the controller 7−48
C0088 Rated motor
current
à 0.0 {0.1 A} 650.0 à Depending on the controller
0.0 ... 2.0 x rated output current of the
controller
7−48
C0089 Rated motor
frequency
50 10 {1 Hz} 960 7−48
C0090 Rated motor
voltage
à 50 {1 V} 500 à 230 V with 230 V controllers,
400 V with 400 V controllers
7−48
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