Lenze E82xVxxxKxxxxx - Manual (Page 264)

Function library
Operating mode
Sensorless torque control with speed limitation
10
l
264 EDS82EV903 EN 3.0
10.2.3 Sensorless torque control with speed limitation
Description
The setpoint linked with C0412/6 is interpreted as torque setpoint. Actual values are not
required. The controller varies the speed within the set frequency range in dependence of
the load and the torque selected.
The speed is limited via setpoint 1 or the maximum frequency.
Application with, for instance, winding drives.
)
Note!
ƒ The sensorless torque control only operates in motor mode, not in generator
mode.
ƒ 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
v
Operating
mode 2 2 V/f characteristic control V ~ f
(linear characteristic with constant
V
min
boost)
l Commissioning is possible
without identifying motor
parameters
l Advantage of identification
with C0148:
– Improved smooth running at
low speeds
– V/f rated frequency (C0015)
and slip (C0021) are
calculated and saved. They do
not have to be entered
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3 V/f characteristic control V ~ f 2
(square−law characteristic with
constant V
min
boost)
4 Vector control In the 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
l Torque setpoint via C0412/6
l Speed limitation via setpoint 1
(NSET1−N1) if C0412/1 is assigned,
otherwise via maximum frequency
(C0011)
C0047
* Torque
setpoint or
torque limit
(MCTRL1−
MSET) 400 0 {1 %} 400 The set value will be lost during
mains switching!
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Reference: Rated motor torque determined
through motor parameter identification In "Sensorless torque control"
operating mode (C0014 = 5):
l Torque setpoint selection if
C0412/6 = FIXED−FREE (not
assigned)
l Torque setpoint display if
C0412/6 is linked to a signal
source
In "V/f characteristic control" or
"Vector control" operating mode
(C0014 = 2, 3, 4):
l Display of the torque limit
value if C0412/6 is linked to a
signal source
l Display C0047 = 400 if C0412/6
= FIXED−FREE (not assigned)