Polyphase linear motor
First Claim
1. A polyphase linear motor, particularly for use as a drive motor for peripheral equipment in data-processing installations or the like, the motor comprising a stator and an armature mounted for travel along the length of the stator, the stator including an elongated inner flux-carrying structure extending in the direction of armature travel;
- a plurality of stationary coils on the inner flux-carrying structure, the stationary coils being spaced in the direction of armature travel;
a plurality of permanent magnet units on the armature, the permanent magnet units being spaced in the direction of armature travel, each permanent magnet unit surrounding the inner flux-carrying structure and the coils on the latter, the magnetic polarity of successive ones of the permanent magnet units alternating proceeding in the direction of armature travel from one permanent magnet unit to the next; and
an outer flux-carrying structure extending in the direction of armature travel and surrounding the armature.
2 Assignments
0 Petitions
Accused Products
Abstract
The linear motor comprises a stator and an armature mounted for travel along the length of the stator. The stator includes an elongated inner flux-carrying structure extending in the direction of armature travel. A plurality of stationary coils are provided on the inner flux-carrying structure, the stationary coils being spaced in the direction of armature travel. The armature is provided with a plurality of radially magnetized permanent magnet units spaced in the direction of armature travel. The magnetic polarity of successive ones of the permanent magnet units alternates, proceeding in the direction of armature travel from one permanent magnet unit to the next. An outer flux-carrying structure, provided on either the stator or armature, extends in the direction of armature travel and surrounds the armature. Because the polarity of successive permanent magnet units alternates, proceeding from one to the next, the flux passing through the inner and outer flux-carrying structures is not, at any point, equal to the sum of the fluxes from all the permanent magnets, and accordingly the flux-carrying structures can be of smaller flux-conducting cross-sectional areas, and therefore of lower weight.
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Citations
22 Claims
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1. A polyphase linear motor, particularly for use as a drive motor for peripheral equipment in data-processing installations or the like, the motor comprising a stator and an armature mounted for travel along the length of the stator, the stator including an elongated inner flux-carrying structure extending in the direction of armature travel;
- a plurality of stationary coils on the inner flux-carrying structure, the stationary coils being spaced in the direction of armature travel;
a plurality of permanent magnet units on the armature, the permanent magnet units being spaced in the direction of armature travel, each permanent magnet unit surrounding the inner flux-carrying structure and the coils on the latter, the magnetic polarity of successive ones of the permanent magnet units alternating proceeding in the direction of armature travel from one permanent magnet unit to the next; and
an outer flux-carrying structure extending in the direction of armature travel and surrounding the armature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- a plurality of stationary coils on the inner flux-carrying structure, the stationary coils being spaced in the direction of armature travel;
Specification