Magnetic levitation motor and stator structure thereof

Abstract

The embodiment of the invention discloses a magnetic levitation motor and a stator structure thereof. The stator structure of the magnetic levitation motor comprises a plurality of first multiphase coil units arranged along a first direction, wherein the total length occupied by any first multi-phase coil unit in the first direction is equal to the polar distance, any first multi-phase coil unit comprises a plurality of first single-phase coils which are arranged in a lap winding mode in the first direction, any first single-phase coil comprises a plurality of first single-turn coils connectedin series, and the plurality of first single-turn coils are arranged in at least one layer along a third direction; the first single-turn coil is in a pattern with two straight edges which extend along the second direction and are arranged along the first direction; and the first direction, the second direction and the third direction are perpendicular to one another. According to the technical scheme of the embodiment of the invention, the influence of the coil skin effect can be reduced, the eddy current of the stator coil array is reduced, the copper loss of the stator coil array is reduced, the electromagnetic damping force of the stator coil array is reduced, and the motor thrust density is improved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a magnetic levitation motor and a stator structure thereof. Background technique [0002] The magnetic levitation planar motor is a non-contact two-dimensional motion actuator that can achieve precise positioning within a large stroke. The motor's mover secondary and stator primary use magnet arrays and coil arrays, respectively. After the coil is excited, it can provide buoyancy in the vertical direction and thrust in the horizontal direction for the mover secondary. Since no additional mechanical support components and guide units are used, the magnetic levitation planar motor can simultaneously realize translation and rotation within the stroke range. The stator coil array is the core component of the motor, and it is required to have high electromagnetic thrust density, so as to realize the high-speed operation of the magnetic levitation planar motor. [0003] At present, t...

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Problems solved by technology

[0003] At present, the stator coil array of the moving magnet type magnetic levitation planar motor is composed of a single wire or copper strip, which can ensure the fullness of the stator slot; but because the permanent magnet moves in the magnetic field and cuts the magnetic induction line, it is also affected by the skin effect. Influence, which in turn leads to a large eddy current and electromagnetic damping force generated by a single wire or copper strip, which hinders the high-speed operation of the moving magnet magnetic levitation planar motor

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