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All copying, even partial, of this manual is strictly forbidden
RG66007967 - Rev 02
Our compressors and hydraulic pumps use BLDC synchronous
electric motors (Brushless Direct Current). Synchronous
motors are distinguished by a constant of rotation regardless
of the load (or torque) but related to the definite frequency
of the inverter.
The Brushless synchronous motor has no brushes as the
power is only sent to the stator and not directly to the rotor,
therefore, sliding electrical contacts are not required. Over 20
Hz, the mP on board controls a feedback signal (BEFM Back
Electro Motive Force) that can certify the rotor's synchronous
rotation with a magnetic field and implements any torque
corrections to restore/maintain synchronism and therefore
maximum efficiency.
- The BLDC does not require induction in the stator windings
(there already is a permanent magnet in the rotor) =>
There are no relative losses.
- The BLDC has no rotor currents (due to the stator induction
of the asynchronous motors) => No rotor loss.
- The BLDC has no sliding contacts => No maintenance. The
position of the rotor is detected by measuring the BEFM
(back electro motive force), caused by the rotor during
the non-energised phase (when one of the three passage
phases is zero): there are no Hall effect sensors in the motor
due to their unreliability at high speed and temperature
and therefore the motor is also called “sensorless”.
3.3
SYNCHRONOUS MOTORS
Stator
Rotor
Touch Screen Display:
Possibility of 10.4” Touch Screen Display with WINDOWS CE®
operating system.
User interface:
The user interface, PGD1, consists of an LCD display (8 rows x
22 columns) and 6 keys.
All the program operations can be run, the conditions of
the operating unit can be displayed at any time and the
parameters can be modified.
