VENTILATEUR COMPORTANT UN DISPOSITIF DE TRANSFORMATION D'UN COURANT ELECTRIQUE TRIPHASE
A fan, characterized in that the conversion device ( 59 ) is made up of three separate single-phase autotransformers ( 79 a, 79 b, 79 c ) that are magnetically uncoupled, each single-phase autotransformer ( 79 a, 79 b, 79 c ) being connected to one of the input terminals ( 70 a, 70 b, 70 c ) and at least one of the output terminals ( 71 a 1 , . . . , 71 c 1 , 71 a 2 , . . . , 71 c 2 ), and being able to modify the voltage values of a single-phase input AC current coming from the corresponding input terminal to obtain a modified output current on the or each output terminal ( 71 a 1 , . . . , 71 c 1 , 71 a 2 , . . . , 71 c 2 ) corresponding to that single-phase autotransformer ( 79 a, 79 b, 79 c ).
1 - 12 . (canceled)
13 . A fan including a rotary electric machine and a supply module able to connect the rotary electric machine to a power grid supplying a three-phase AC current;
the supply module including a conversion device able to adapt the three-phase AC current supplied by the power grid to the power supply of the rotary electric machine ;
the conversion device includes three input terminals connected to the electric supply grid and at least three output terminals connected to the rotary electric machine ;
wherein the conversion device is made up of three separate single-phase autotransformers that are magnetically uncoupled, each single-phase autotransformer being connected to one of the input terminals and at least one of the output terminals, and being able to modify the voltage values of a single-phase input AC current coming from the corresponding input terminal to obtain a modified output current on the or each output terminal corresponding to that single-phase autotransformer.
14 . The fan according to claim 13 , wherein the three single-phase autotransformers are substantially identical.
15 . The fan according to claim 13 , wherein each single-phase autotransformer comprises a ferromagnetic core with a toroid shape, and a primary winding wound around at least part of the core and connected to the input terminal corresponding to this single-phase autotransformer.
16 . The fan according to claim 15 , further comprising first connecting means making it possible to connect the primary windings in a triangle.
17 . The fan according to claim 15 , further including at least six output terminals, the fan being able to convert the three-phase AC current supplied by the electric power grid into six single-phase AC output currents, each single-phase AC output current supplying one of the output terminals.
18 . The fan according to claim 17 , wherein each single-phase autotransformer further comprises two secondary windings wound around at least part of the core, each secondary winding being connected to one of the output terminals corresponding to this single-phase autotransformer.
19 . The fan according to claim 18 , further comprising second connecting means making it possible to connect the secondary windings corresponding to a same single-phase autotransformer and the primary windings corresponding to the other two single-phase autotransformers.
20 . The fan according to claim 13 , wherein the rotary electric machine is a three-phase machine.
21 . The fan according to claim 20 , wherein the power module further includes a rectifier able to convert the three-phase AC current supplied by the conversion device into a DC current, and an inverter able to convert the DC current supplied by the rectifier into a three-phase current suitable for powering the rotary electric machine;
the rectifier being connected between the conversion device and the inverter, the inverter being connected between the rectifier and the rotary electric machine.
22 . The fan according to claim 13 , wherein:
the rotary electric machine includes a cylindrical outer wall; and
the single-phase autotransformers are positioned around the outer wall of the rotary electric machine.
23 . The fan according to claim 23 , wherein the single-phase autotransformers are uniformly spaced around the outer wall of the rotary electric machine.
24 . The fan according to claim 13 , further including at least six output terminals, the fan being able to convert the three-phase AC current supplied by the electric power grid into six single-phase AC output currents, each single-phase AC output current supplying one of the output terminals.