High thrust density cylinder type linear electric motor

A linear motor, high thrust technology, applied in synchronous machines, electrical components, electromechanical devices, etc., can solve the problems of large positioning force, complex manufacturing process, low overload capacity and thrust density of linear motors, and can eliminate the positioning force and improve the Overload capacity and thrust density, the effect of simplifying the manufacturing process

Inactive Publication Date: 2009-10-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of the existing linear motors such as large positioning force, low overload capacity and thrust density, and complex manufacturing process, the present invention proposes a high thrust density cylindrical linear motor

Method used

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  • High thrust density cylinder type linear electric motor
  • High thrust density cylinder type linear electric motor
  • High thrust density cylinder type linear electric motor

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specific Embodiment approach 1

[0012] Specific implementation mode one: combine figure 1 with image 3 Describe this embodiment, the motor of this embodiment is an outer armature structure, the primary is composed of an armature core 1, an armature winding 2 and a casing 3; Both the magnet 4 and the magnetic yoke 5 are cylindrical; the permanent magnet 4 and the magnetic yoke 5 are arranged at intervals in the cylindrical fixing part 6; the armature core 1 is cylindrical, and the armature core 1 The outer wall of the armature core 1 is uniformly opened with radial grooves 7 opening outwards in the radial direction. The width of the grooves 7 is 0.1 mm to 2 mm. The outer wall of the armature core 1 is fixed on the inner wall of the cylindrical casing 3; The coils of the armature winding 2 are circular coils, and the coils forming the armature winding 2 of each phase are arranged sequentially on the inner wall of the armature core 1; an air gap 8 is arranged between the inner wall of the coil and the outer ...

specific Embodiment approach 2

[0015] Specific implementation mode two: combination figure 2 with image 3 To illustrate this embodiment, the motor of this embodiment is an inner armature structure; the primary is composed of an armature core 1, an armature winding 2 and a fixing member 6; the secondary is composed of a permanent magnet 4, a magnetic yoke 5 and a casing 3; The permanent magnet 4 and the magnetic yoke 5 are circular; the permanent magnet 4 and the magnetic yoke 5 are arranged at intervals in the cylindrical casing 3; the armature core 1 is cylindrical, and the armature The outer wall of the iron core 1 is evenly opened with radial grooves 7 opening outwards in the radial direction. The width of the grooves 7 is 0.1 mm to 2 mm. The inner wall of the armature core 1 is fixed on a cylindrical or cylindrical fixing member 6 on the outer wall of the armature winding 2; the coils of the armature winding 2 are circular coils, and the coils forming the armature winding 2 of each phase are arranged...

specific Embodiment approach 3

[0018] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the permanent magnet 4 adopts a rare earth permanent magnet, which is magnetized in the axial direction, and the magnetization direction of the adjacent permanent magnet 4 is opposite; the fixing member 6 adopts a non-magnetic material, Such as stainless steel; the casing 3 is made of light non-magnetic material, such as aluminum alloy; the magnetic yoke 5 is made of magnetic material with high saturation flux density. Other compositions and connection modes are the same as those in Embodiment 1 or 2.

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Abstract

A high thrust density cylinder type linear electric motor of the invention relates to motor technology. The invention settles the problems of high positioning force, low overload capacity and thrust density and complex fabrication technique of prior linear motor. A permanent magnet and a magnetic yoke are cylindrical and are arranged separately. An armature core is cylindrical, and the outer wall of armature core is uniformly distributed with radiation-shaped grooves with outwards openings. The widths of grooves are 0.1-2mm. The armature core is fixed in the casing or outside the fixing component. The coils of armature winding are sequentially arranged on the inner wall or outer wall of armature core. An air gas is installed between a primary step and a secondary step. The axial length of permanent magnet is larger than the summation of axial thickness b of coil, radial length a of air gap 8 and the wall thickness c of fixing component 6. The axial length of magnetic yoke is 1 / 3-1 / 6 of axial length of permanent magnet. The length La of armature core and the secondary pole distance taup satisfy the following relationships: La=ntaup+deltaL, deltaL=deltaL1+delta2=1 / 2taup. The high thrust density cylinder type linear electric motor of the invention has the advantages of simple manufacturing technique, eliminated positioning force caused by core grooving, and increased overload capacity and thrust density of electric motor.

Description

technical field [0001] The invention relates to motor technology, in particular to a cylindrical linear motor with high thrust density. Background technique [0002] The structure of the existing cylindrical permanent magnet linear synchronous motor is as follows: Figure 4 shown. The armature core adopts a cogged structure, and the winding is embedded in the core slot. On the one hand, the positioning force caused by the slotting of the core will be generated. On the other hand, when the winding current is large, the armature reaction will cause saturation of the magnetic circuit and gas The distortion of the gap magnetic field and the increase of iron loss limit the overload capacity and thrust density of the motor. At the same time, the existence of iron core teeth will reduce the density of winding embedding, thereby affecting the improvement of thrust density, and the manufacturing process of the motor is complicated. Contents of the invention [0003] In order to so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/00H02K21/02H02K3/04
Inventor 寇宝泉李立毅吴红星黄旭珍
Owner HARBIN INST OF TECH
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