Foc Motor Control - Pentax IPFC 109 Operating Manual

INITIAL SETUP
COMPLETED

6.2.1 FOC motor control

Introduction
FOC (Field Oriented Control) motor control implemented in FOC-ready inverters provides the following advantages compared
to traditional control:

Optimal control of the current at each work point.

Quick and precise speed adjustment.

Lower energy consumption.

Reduction of torque oscillations (vibrations) for smoother and more regular operation throughout the frequency
range and lower system noise.

Lower mechanical stress on the motor, pump and hydraulic system.
FOC control of FOC-ready devices can be used with:

Asynchronous three-phase motors

Permanent magnet three-phase synchronous motors
The control is sensorless, i.e. not requiring the use of any sensors.
Calibration of the FOC control
To enable the device to perform FOC control, it is necessary to:
1. Perform all system wiring. Connect the load (pump) to the inverter with a cable of appropriate length and possible
presence of a dV/dt or sinusoidal filter.
2. Power the system and follow the initial configuration procedure by specifying:
a) Motor type: three-phase asynchronous or permanent magnet synchronous.
b) Rated voltage of the motor.
c) Rated frequency of the motor.
d) Rated current of the motor increased by 5%.
3. Perform the Auto tuning process to allow the inverter to learn the electrical information of the load connected to it
(motor, cable and any filter). The calibration process can take up to one minute.
4. Wait for the calibration process to complete successfully.
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.
Carefully follow the safety instructions in the installation and operating manual of the device.
Once the Setting procedure is completed you will get this indication
on the display; setting parameters are recorded by IPFC; these
parameters can be set up individually in the parameters menu.
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