8400 StateLine C | Reference manual
Motor control (MCTRL)
Sensorless control for synchronous motors (SLPSM)
180
L
Firmware
≤
11.00 - DMS 8.0 EN - 10/2011
5.8.3
Basic settings
The following "Initial commissioning steps" must be performed to commission the
sensorless control for synchronous motors:
Initial commissioning steps
1. Select motor control:
C00006
= "3: SLPSM: Sensorless PSM"
2. Set the motor selection/motor data
• When selecting and parameterising the motor, the motor nameplate data and the equivalent circuit
diagram data are relevant. Detailed information can be found in the "
Motor selection/Motor data
"
chapter.
(
107)
Depending on the motor manufacturer, proceed as follows:
Lenze motor:
Selecting a motor from the motor catalogue in the
»Engineer«
- or -
1.Set the motor nameplate data
2.
Automatic motor data identification
Third party manufacturer's motor:
1.Set the motor nameplate data
2.
Automatic motor data identification
or set known
equivalent circuit diagram manually:
C00084
: Motor stator resistance
C00085
: Motor stator leakage inductance
3. Set speed switching thresholds between open-loop and closed-loop controlled operation:
• Set transition speed from open-loop to closed-loop operation in
C00996/2
in [%] with regard to the rated
motor speed (
C00087
).
• Set transition speed from closed-loop to open-loop operation in
C00996/2
in [%] with regard to the rated
motor speed (
C00087
).
Tip!
• With voltage-adjusted motors, a speed switching threshold of 10 % is recommended.
• As a rule of thumb, the speed switching threshold should be selected as follows:
4. Set open-loop accelerating current in
C00995/1
in [%] with regard to the rated motor current (
C00088
).
• This value defines the height of the current that is injected during the acceleration process.
• The accelerating current must be dimensioned so that the required torque in the lower speed range can
always be reached (acceleration load torque):
5. Set open-loop steady-state current in
C00995/2
in [%] with regard to the rated motor current (
C00088
).
• This value defines the height of the current for processes without acceleration (e.g. standstill or constant
setpoint speed ).
6. For improving the operating characteristics:
If required, adapt the filter time for reconstructing the rotor position and the actual speed value through the
motor model in
C00998/1
and
C00998/2
.
• We recommend using the Lenze setting:
Filter time rotor position (
C00998/1
) = 3 ms
Filter time actual speed value (
C00998/2
) = 5 ms
• Deviant from this, the following value range can be used:
Filter time rotor position (
C00998/1
) = 2 ... 5 ms
Filter time actual speed value (
C00998/2
) = 3 ... 8 ms
7. For protecting the motor from demagnetisation:
Set the ultimate current in
C00939
.
C00996/1...2 [%]
U
Rated, motor
[V]
U
Rated, FI
[V]
---------------------------------------
10
⋅
=
C00995/1 [%]
M
Meax
[Nm]
M
Rated
[Nm]
-------------------------------
I
Rated, motor
[A] 1.3
⋅
⋅
=
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
