Motor-vibrator assembly for a vibrating machine
AssigneeOli S.P.A.
InventorsMichele Modenese, Raffaello Frati, Giacomo Fabbri
Life of this patent
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Abstract
Motor-vibrator assembly for a vibrating machine having a plurality of motor-vibrators, each having a synchronous motor and at least one eccentric mass divided into two bodies fixed to two respective free ends of the shaft of the motor. The motor-vibrator assembly comprises position sensing means to sense the angular position and the angular velocity of the shafts of the synchronous motors, electronic drive devices to operate the synchronous motors and an electronic control unit, which is configured to control the electronic drive devices based on the angular positions and on the angular velocities sensed, so that the motor-vibrator assembly generates a predetermined vibratory motion.
Claims18
Motor-vibrator assembly for a vibrating machine, the motor-vibrator assembly (5) comprising a plurality of motor-vibrators (6), each of which comprises an electric motor consisting of a synchronous motor (9) and at least one eccentric mass (10) connected on the drive shaft (11) of the synchronous motor (9), position sensing means (15;
- 15a) to sense the angular position and measure the angular velocity of the drive shafts (11), electronic drive means (14) to drive the synchronous motors (9), and electronic control means (19), which are configured to control said electronic drive means (14) based on the angular positions sensed and on the angular velocities measured so that the motor-vibrator assembly (5) generates a predetermined vibratory motion;
- the motor-vibrator assembly (5) being characterized in that the eccentric mass (10) is fixed to the drive shaft (11) of the relative synchronous motor (9) and is divided into two bodies (10a, 10b) which are fixed to two respective free ends of the drive shaft (11), the two free ends of the drive shaft (11) projecting from a casing (12) of the synchronous motor (9) in the area of two respective opposite longitudinal ends of the synchronous motor (9).
Method to control a vibrating machine comprising a body (3), elastic means (4) to mount the body (3) on a base (2) and a motor-vibrator assembly (5) comprising:
- a plurality of motor-vibrators (6), each of which is fixed to the body (3) and comprises a synchronous motor (9) and at least one eccentric mass (10) fixed on the drive shaft (11) of the synchronous motor (9), the eccentric mass (10) being divided into two bodies (10a, 10b) fixed to two free ends of the drive shaft (11), the two free ends of the drive shaft (11) projecting from a casing (12) of the synchronous motor (9) in the area of two respective opposite longitudinal ends of the synchronous motor (9);
- position sensing means (15;
- 15a) to sense the angular position and measure the angular velocity of the drive shafts (11);
- and electronic drive means (14) to drive the synchronous motors (9);
- the method comprising:
- sensing first vibrations by means of first acceleration sensing means (32) fixed to a casing (12) of the synchronous motor (9);
- processing the first vibrations sensed so as to determine a vibrational state of the motor-vibrator assembly (5);
- and
- controlling the electronic drive means (14) based on the angular positions sensed, on the angular velocities measured and on the vibrational state, so that the motor-vibrator assembly (5) generates a predetermined vibratory motion.
Dependencies are inferred from the claim text.