8. How to enable Sensorless Vector mode
Page 8
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The standard motor control mode of the AC10
Inverter is VxF. This simple mode controls
motor speed by varying Volts and Frequency in
a specific ratio to maintain output torque.
The AC10 can also operate in Sensorless
Vector mode. This can improve motor
performance without requiring a separate
feedback device. Sensorless Vector mode
operates in the same way as VxF but performs
a number of calculations to improve low speed
torque.
For loads that cannot be decoupled from the
motor, a stationary Autotune is possible but
requires parameter F809 to be set manually. A
rotating Autotune is therefore the preferred
option.
To enable sensorless vector control first set the
parameter values specified in 8.1 and then
follow the steps described in 8.2 and 8.3.
These calculations require a rotating
“autotune” run with bare shaft during which the
Inverter operates for approx. 10s to gather the
necessary data.
Parameter
Description
How to set
F801
Rated Motor Power (kW)
Rated kW of the motor. Set to match the motor nameplate eg.
(2.2kW)
2200
F802
Rated Motor Voltage (V)
Rated Voltage of the motor. Set to match the motor nameplate eg
V
230
F803
Rated Motor Current (A)
Rated current of the motor. Set to match the motor nameplate eg
A
2.4
F805
Base Motor rpm
Rated rpm of the motor. Set to match the motor nameplate eg
rpm (min-1)
1460
Once this is set, read-only parameter F804 (number of motor poles) will be recalculated.
8.1 Parameters to check prior to an Autotune.
Easy Start Guide
Parker AC10 Series Inverter (to 22kW)
Once the parameters in 8.1 have been set, select parameter F800
and press “E” to edit the value. Change the value to 1. The value will
flash. Press “E” again to save. The display will return to F800.
Ensure that the motor is decoupled from the load before pressing the
green “I” (start) button to begin the autotuning process. This will take
approx. 10 seconds during which the “run” lamp will illuminate and
the motor will accelerate and decelerate.
8.2 Start Autotune.
8.3 The Autotune process.
During the autotuning process, the display will show “TEST”.
When the process is complete the motor will stop, the “run” lamp will
no longer be illuminated and the display will return to the speed
reference. The results are saved in parameters F806 to F809 but
sensorless vector mode is not enabled automatically.
Important: To enable sensorless vector mode once the autotune
is complete set parameter F106 to 0.
