A linear movement electrical machine (1) with linear movement in a direction of displacement, configured to operate according to at least one of a motor mode, in which electrical energy is transformed into mechanical energy of linear movement type in the direction of displacement, and a generator mode, in which mechanical energy of the linear movement type in the direction of displacement is transformed into electrical energy, said electrical machine comprising:
- a primary assembly (3) comprising at least one stator assembly (31) configured to be fixed to a frame (2);
- a secondary assembly (4) configured to move relatively with respect to the primary assembly (3) in the direction of displacement, the secondary assembly (4) comprising an interaction part (41) within which a plurality of interaction sub-parts (411) are distributed in the direction of displacement, and at least one shaft (42), which is integral with the interaction part (41) and extends in the direction of displacement,
- each stator assembly (31) being arranged opposite the interaction part (41) of the secondary assembly (4);
- translational guide means (5) configured to guide the relative movement of the secondary assembly (4) with respect to the primary assembly (3);
- and
- an electrical module (7) ;
- each stator assembly (31) comprising:
- a yoke (311) which has at least two lateral contact faces (311b), defined on either side of an axis parallel to the direction of displacement and passing through the centre of the yoke (311);
- at least two pairs (312) of teeth (312a, 312b), each tooth (312a, 312b) having a head end (312d) configured to come into contact with a lateral contact face (311b) of the yoke (311) and a base end (312e), opposite the head end (312d), configured to be oriented towards the interaction part (41) of the secondary assembly (4), such that an air gap (6) is formed between the teeth (312a, 312b) and the interaction sub-parts (411) of the secondary assembly (4) and that, upon relative movement of the secondary assembly (4) with respect to the primary assembly (3), an interaction sub-part (411) of the secondary assembly (4) moves relatively parallel to the surface formed by the base ends (312e) of the teeth (312a, 312b) of the opposing stator assembly (31), the pairs (312) of teeth (312a, 312b) being spaced apart along the yoke (311) in the direction of displacement, the teeth (312a, 312b) of a pair (312) of teeth (312a, 312b) being arranged diagonally along the yoke (311) such that, for each pair (312) of teeth (312a, 312b), a first tooth (312a) is in contact with a lateral contact face (311b) of the yoke (311) and a second tooth (312b) is in contact with another lateral contact face (311b) of the yoke (311), a coil (312f) surrounding each tooth (312a, 312b) around a body section (312g) between the head end (312d) and the base end (312e), and each tooth (312a, 312b) being configured to interact magnetically with opposing interacting sub-parts (411) of the opposing secondary assembly (4);
- securing means (313) configured to be able to secure the teeth (312a, 312b) to the yoke (311), the securing means (313) being configured such that at least one of the following conditions is satisfied:
- a) for at least one stator assembly (31), the securing means (313) comprise at least one resin-type material configured to encapsulate the teeth (312a, 312b) on the yoke (311);
- b) for at least one stator assembly (31), the securing means (313) comprise two jaws (313a, 313b), arranged on either side of the yoke (311), configured to secure the teeth (312a, 312b) to the yoke (311), each jaw (313a, 313b) comprising at least one plate, a first jaw (313a) being intended to receive the first teeth (312a) of the pairs (312) of teeth (312a, 312b) and a second jaw (313b) being intended to receive the second teeth (312b) of the pairs (312) of teeth (312a, 312b), and both jaws (313a, 313b) being configured to be made integral with each other so as to bring the teeth (312a, 312b) and the yoke (311) into contact;
- c) for at least one stator assembly (31), at least one of the teeth (312a, 312b) is welded to the yoke (311);
- d) for at least one stator assembly (31), at least one of the teeth (312a, 312b) is bonded to the yoke (311);
- e) for at least one stator assembly (31), the yoke (311) comprises a groove, extending in the direction of displacement, and the teeth (312a, 312b) comprise projections configured to engage the groove, or vice versa;
- and
- fixing means (314) configured to fix the stator assembly (31) to the frame (2);
- the linear movement electrical machine (1) further comprising at least one of magnets (413, 414) arranged between interaction sub-parts (411) of the interaction part (41) of the secondary assembly (4), and magnets (315) arranged between the teeth (312a, 312b) and the yoke (311) of at least one stator assembly (31);
- in motor mode, the electrical module (7) is configured to transmit a polyphase AC supply to the coils (312f) so as to generate time-varying magnetic fields, each coil (312f) being configured and powered to generate a magnetic polarity at the base end (312e) of the tooth (312a, 312b) that it surrounds and to generate an opposite magnetic polarity at the head end (312d) of the tooth (312a, 312b) that it surrounds, and the coils (312f) of each pair (312) of teeth (312a, 312b) being configured to generate a polarity at the base end (312e), respectively at the head end (312d), of the first tooth (312a) and to generate an opposite polarity at the base end (312e), respectively at the head end (312d), of the second tooth (312b), so as to create a transverse magnetic loop between said first tooth (312a), the yoke (311) and said second tooth (312b), and
- the coils (312f) of each pair (312) of teeth (312a, 312b) being configured and powered such that the produced magnetic fields vary as a function of variations in the polyphase AC supply so as to produce a relative displacement of the secondary assembly (4) with respect to the primary assembly (3);
- in generator mode, the electrical module (7) is configured to recover electrical currents generated, in the coils (312f) surrounding the teeth (312a, 312b) of the primary assembly (3), by magnetic interactions formed between the interaction part (41) of the secondary assembly (4) and the teeth (312a, 312b) of the primary assembly (3).