Linear motor

H - Electricity – 02 – K

Patent

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Details

H02K 41/03 (2006.01) H02K 37/24 (2006.01) H02K 41/02 (2006.01)

Patent

CA 2131873

A linear motor includes a stator 1 having an even number N of salient poles 11, 12, ... disposed at an equal angle pitch and a mover 3 disposed movably in a shaft direction. The salient poles are constituted by pairs of salient poles adjacent to each other and including m sets of salient pole groups composed of (N/2m) sets of salient pole pairs disposed at an angle of (720m/N) degrees. Windings W1, W2, ... wound on (N/m)-1 or (N/m)-2 salient poles belonging to each of the salient pole groups are connected to have opposite polarities between the pair of salient poles and are connected to have the same polarity between the salient poles which do not constitute the pair of salient poles and are disposed to interpose the salient pole of the other phase therebetween to constitute phase windings for m phases. Remaining salient poles of the salient pole group are caused to detect a position and a movement direction of the mover 3 as sensor poles SA and SB.

Ce moteur à impulsions linéaire comprend un stator 1 ayant un nombre pair N de pôles saillants 11, 12, ... disposés à un angle de calage égal et un dispositif d'actionnement mobile 3 disposé dans le sens de l'arbre. Les pôles saillants sont constitués de paires de pôles saillants adjacents les uns aux autres et comprenant m jeux de groupes de pôles saillants constitués de (N/2m) jeux de paires de pôles saillants disposés selon un angle de (720m/N) degrés. Les enroulements W1, W2, ... enroulés sur (N/m) 1 ou (N/m) 2 pôles saillants appartenant à chacun des groupes de pôles saillants sont raccordés de manière à avoir des polarités opposées entre la paire de pôles saillants et la même polarité entre les pôles saillants qui ne constituent pas une paire de pôles saillants et sont disposés pour interposer le pôle saillant de l'autre phase se trouvant entre les deux pour constituer des enroulements de phase de m phases. Les pôles saillants du groupe de pôles saillants qui restent servent à détecter la position et la direction du mouvement du dispositif d'actionnement 3 à titre de pôles de détection SA et SB.

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