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(11) | EP 4 424 618 A8 |
| (12) | CORRECTED EUROPEAN PATENT APPLICATION |
| published in accordance with Art. 153(4) EPC |
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| (54) | LINEAR DRIVE FOR CONTINUOUS BULK MATERIAL CONVEYING DEVICE |
| (57) This invention relates to a double-face linear motor with a short primary and a segmented
secondary designed for use in belt conveyors, where rotary motors are predominantly
used. In this invention, the primary remains fixed and static, firmly connected to
the conveyor structure, and the secondary must follow the belt that moves in a closed
loop in a vertical plane around return drums. This motor can improve the efficiency
of conventional conveyor belts that use rotary electric motor units in their head
drums. The driving method consists in electromagnetically moving by induction the
secondary blades made of a conducting material as they pass between the active faces
of the motor primary, where multiphase coils are arranged. The secondary blades are
fastened to the travelling belt and move the belt by means of the electromagnetic
forces generated in the primary. The long segmented secondary makes a distributed
linear drive possible because the segments formed by the blades adapt to the loop
path formed by the return drum of the belts. The use of this equipment for conveying
granulated materials, such as those from mining activities, requires a number of protective
measures in order to ensure the good operation of the machine.
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