Bearingless permanent magnet slice motor

A bearingless, thin-film technology, applied in synchronous motors with stationary armatures and rotating magnets, magnetic circuits, electric components, etc., can solve problems such as increasing production costs, increasing axial length, increasing motor volume, etc. The effect of copper loss, reduction of axial length, and improvement of working performance

CN106787302APending Publication Date: 2017-05-31JIANGSU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2017-05-31

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Abstract

The invention discloses a bearingless permanent magnet slice motor. A slice rotor is coaxially arranged in a stator in a sleeving manner; a cylindrical magnetic flux collecting apparatus is coaxially arranged in the slice rotor in a sleeving manner; a first radial air gap is reserved between the magnetic flux collecting apparatus and the slice rotor; the stator consists of six same L-shaped stator iron core columns which are uniformly distributed along a circumferential direction; six radial horizontal sections form a stator salient pole; the slice rotor and the magnetic flux collecting apparatus are put in a tray opening of a slice rotor hard plastic tray; a second radial air gap is reserved between the slice rotor and the inner side surface of the opening of the slice rotor hard plastic tray; the top end of a permanent magnet is fixedly connected with the bottom surface of the slice rotor hard plastic tray while the bottom end of the permanent magnet is fixedly connected with the centre of a stator iron core magnetic yoke, and the permanent magnet is magnetized axially; the axial perpendicular sections of the six L-shaped stator iron core columns are wound with suspension force windings and torque windings; and the salient pole circular ring rotor is adopted to replace a permanent magnet rotor, so that the mechanical structure of the motor is more compact, and the power density is improved.
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Description

technical field

[0001] The invention belongs to the field of motor manufacturing and relates to a bearingless permanent magnet sheet motor, which is suitable for many fields such as sealed pumps, industrial pharmacy and life sciences. Background technique

[0002] The bearingless sheet motor is a new type of motor that combines magnetic suspension bearings with bearingless technology. Two sets of windings with different pole pairs in the stator slot (that is, the torque winding and the levitation force winding) work together to generate a magnetic field. By controlling the magnitude and direction of the superimposed synthetic magnetic field, the magnitude and direction of the levitation force of the motor can be controlled, thereby realizing the rotor of the motor. Stable suspension operation. In addition, due to the special mechanical structure of the bearingless permanent magnet sheet motor, the axial length of the rotor is much smaller than the outer diameter of the roto...

Examples

Embodiment Construction

[0020] Such as figure 1 and figure 2 As shown, the present invention has a sheet rotor 1 and a stator 2 , the inner diameter of the stator 2 is larger than the outer diameter of the sheet rotor 1 , and the sheet rotor 1 is coaxially sleeved in the stator 2 . A cylindrical magnetic flux collection device 3 is coaxially sleeved inside the sheet rotor 1, and the magnetic flux collection device 3 is made of a magnetically conductive material. The inner diameter of the thin-film rotor 1 is larger than the outer diameter of the magnetic flux collecting device 3 , and a radial air gap 15 is left between the magnetic flux collecting device 3 and the thin-film rotor 1 . The central axis of the magnetic flux collecting device 3 is the central axis of the motor.

[0021] The sheet rotor 1 adopts a 4-pole salient pole structure. The stator 2 is composed of 6 identical L-shaped stator core columns, and the 6 identical L-shaped stator core columns are evenly distributed along the circum...