• Quick and accurate speed adjustment.
• Lower energy consumption.
• Reduction of torque fluctuations (vibrations) for smoother and more regular operation throughout the frequency
range and less system noise.
• Less mechanical stress on the motor, pump and hydraulic system.
The FOC control of "FOC-ready" devices can be used with:
• Three-phase asynchronous motors
• Permanent magnet three-phase synchronous motors
The control is "sensorless" and therefore does not require the use of any sensor.
9.4.2. FOC control calibration
To enable the device to perform the FOC check it is necessary:
1. Carry out all system wiring. Connect the load (pump) to the inverter using a cable of suitable length, and any
dV / dt or sine filter.
2. Power up the system and follow the initial set-up procedure specifying:
a. Motor type: three-phase asynchronous or permanent magnet synchronous motor.
b. Rated voltage of the motor according to its data plate.
c. Rated frequency of the motor according to its data plate.
d. Rated current of the motor increased by 5% compared to the value on the data plate.
3. Carry out the Auto tuning process to allow the inverter to learn the electrical information of the load connected
to it (motor, cable and filter - if any). The calibration process can take up to 1 minute.
4. Wait for the calibration process to be completed successfully.
NOTE
The calibration process can take up to 1 minute. Wait until it is completed.
NOTE
The calibration process must be performed in the final electrical configuration of the system, that is
after the motor, the cable and any filter have been fitted.
If a change is made to the motor, cable or filter once they have been fitted, the calibration process
must be repeated.
CAUTION
Incorrect setting of motor voltage, frequency and rated current leads to incorrect results in the
calibration process and consequently to motor malfunction.
WARNING
Setting the rated current of the motor too high compared to the value on the data plate can seriously
damage both the motor and the inverter. Setting the rated current of the motor too high compared to
the value on the data plate can seriously damage both the motor and the inverter.
WARNING
During calibration the motor coils are heated by the test current. If the motor is self-ventilated, the
absence of motor rotation does not allow the heat to be dispersed by force. The motor should
therefore be allowed to cool between one calibration and the next.
DANGER
During the calibration process, the motor remains stationary but is powered for the entire calibration
period. Disconnect the device from the power supply before any intervention on the equipment and
on the loads connected to it.
If the calibration process is not successful, check that:
• The connections between the inverter and the load (including any interposed motor filters).
• The set rated voltage, frequency and current values.
VASCO - VAriable Speed COntroller
35
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