Setpoint channel and closed-loop control
7.4 Vector speed/torque control with/without encoder
Drive converter cabinet units
292
Operating Instructions, 07/07, A5E00288214A
Supplementary conditions
●
Maximum speed or maximum torque depend on the converter output voltage available
and the back EMF of the motor (calculation specifications: EMF must not exceed U
rated,
converter
).
●
Calculating the maximum speed:
PD[
QRP$&
˭
7
N
9
Q
Calculating kT: see "Commissioning"
●
Depending on the terminal voltage and load cycle, the maximum torque can be taken
from the motor data sheets / project design instructions.
●
One of the following motor encoders must be used for operation with an encoder:
–
SMC10 (option K46): all resolvers that can be connected
–
SMC20 (option K48): SIN/COS encoders with C/D track, EnDat encoders
–
SMC30 (option K50): HTL/TTL encoders with zero mark.
●
No thermal model is available for the closed-loop control of a permanent-field
synchronous motor. The motor can only be protected against overheating using a
temperature sensor (PTC). We recommend that the motor temperature is measured
using a temperature sensor (KTY) in order to achieve a high level of torque accuracy.
Commissioning
The following sequence is recommended for commissioning:
●
Configure the drive
When the drive is being commissioned using STARTER or the AOP30 operator panel,
the permanent-field synchronous motor must be selected. The motor data specified in the
table below must then be entered. Finally, the motor identification routine and speed
optimization (p1900) are activated. Encoder adjustment is activated automatically
together with the motor identification routine.
●
Motor identification (standstill measurement, p1910)
●
Encoder adjustment (p1990) (not for operation without encoder)
Motor Modules with field-oriented closed-loop control specify the current on permanent-
field synchronous motors with regard to the magnetic flux in the motor. To this end, the
motor encoder must provide information about the position of the rotor.
WARNING
During initial commissioning and when the encoder is replaced, the encoder must be
adjusted (p1990).
●
Speed controller optimization (rotary measurement, p1960)
