Stepping motors with small step intervals

Details Stepping motors with small step intervals Stepping motors with small step intervals

H - Electricity

02

K

H02K 37/00 (2006.01) H02K 37/04 (2006.01)

Patent

CA 2743942

An improved motor (90) broadly including a first member (30) and a second member (20) mounted for movement relative to one another. The first member has a plurality of poles (32) spaced substantially equidis-tantly. The second member has a plurality of arms (22). Each arm includes a plurality of fingers (27), a permanent magnet (29), and a coil (25). The fingers are arranged such that their distal end generally faces toward the poles on the first member. Each permanent magnet has a width that is greater than the pole spacing. Each arm is associat-ed with one of a number of phases. The fingers of the arms within a particular phase are arranged such that they simultaneously align with respective poles when the first and second members are in one position relative to one another.

L'invention porte sur un moteur perfectionné (90) qui comprend essentiellement un premier élément (30) et un second élément (20) montés pour se déplacer l'un par rapport à l'autre. Le premier élément comprend une pluralité de pôles (32) espacés de façon sensiblement équidistante. Le second élément comprend une pluralité de bras (22). Chaque bras comprend une pluralité de doigts (27), un aimant permanent (29) et une bobine (25). Les doigts sont agencés de manière que leur extrémité distale est tournée sensiblement face aux pôles sur le premier élément. Chaque aimant permanent a un largeur qui est plus grande que l'espacement des pôles. Chaque bras est associé à l'une de plusieurs phases. Les doigts des bras situés dans une phase particulière sont agencés de telle sorte qu'ils sont alignés simultanément avec les pôles respectifs lorsque les premier et second éléments sont dans une certaine position l'un par rapport à l'autre.

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