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Multi-degree of freedom linear motor

A linear motor, degree of freedom technology, applied in the direction of electrical components, electromechanical devices, electric components, etc., can solve the problem of small y-direction thrust constant

Active Publication Date: 2015-12-30
SHANGHAI MICRO ELECTRONICS EQUIP (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the y-direction thrust constant of this linear motor is small

Method used

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  • Multi-degree of freedom linear motor
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  • Multi-degree of freedom linear motor

Examples

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Embodiment 1

[0048] Preferably, the coil array 300 includes at least one force-generating body, each force-generating body is composed of three coils. In this embodiment, the coil array 300 includes only one force-generating body as an example. The situation is analyzed in detail.

[0049] Preferably, please focus on the reference Figure 8 , the arrangement of the magnet array 200 is: N-type magnet, H-type magnet H1, S-type magnet, H-type magnet H2 (210, 230, 220, 240), the black arrows in the figure represent the magnetization direction of the magnet, press Figure 8 In the way shown in , four sets of magnet arrays 200 form two upper and lower magnetic fields with opposite polarities to match the current direction of the coil, so that the output directions at both ends of the coil are the same, avoiding the offset of the output at both ends, and the y-direction movement of the motor cannot be realized. .

[0050] Preferably, please focus on the reference Figure 8 and Figure 9 , the...

Embodiment 2

[0072] Please focus on reference Figure 14 , the difference between this embodiment and Embodiment 1 is that the coil array includes two power generating bodies 300a and 300b composed of six coils. When the number of power generating bodies increases to two, the two power generating bodies 300a and 300b respectively Powered by two drivers (not shown in the figure), the movement function of three degrees of freedom can be realized: movement in the x direction, movement in the y direction, and rotational movement in the Rz direction. The phase relationship of the three-phase current passed through the two power generating bodies 300a and 300b still needs to satisfy the relationship of formulas (1), (3), (4) or formulas (2), (3), (5).

[0073] Of course, the number of coils of the multi-degree-of-freedom linear motor can be expanded according to the needs, which can be 3n (n=1, 2, 3, 4...positive integers), and the phase relationship of the three-phase current fed into each forc...

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Abstract

The invention relates to a multi-degree of freedom linear motor. The multi-degree of freedom linear motor comprises a first magnet array, a second magnet array, a third magnet array and a fourth magnet array which are successively arranged in parallel along the first direction. A first magnetic field is formed between the first magnet array and the second magnet array. A second magnetic field is formed between the third magnet array and the fourth magnet array. The first magnetic field and the second magnetic field are opposite in polarity. The multi-degree of freedom linear motor also comprises a U-shaped coil array. Two ends of the U-shaped coil array are respectively inserted in the first magnetic field and the second magnetic field. According to the invention, without adding the number of coils, push forces in x and y directions and even torque in the Rz direction are achieved, so that the multi-degree of freedom movement of the linear motor is realized.

Description

technical field [0001] The invention relates to the field of linear motors, in particular to a multi-degree-of-freedom linear motor. Background technique [0002] Linear motors are also called linear motors and push rod motors. The principle can be regarded as cutting the rotating motor radially, taking its stator as the primary, and the mover as the secondary. When the winding is fed with three-phase current, the original Rotary motion becomes linear motion. Compared with the traditional rotary motor, since there is no mechanical transmission link between the linear motor and the workpiece table, it has the characteristics of high speed, high precision and zero transmission, and is widely used in the field of high-end numerical control. [0003] But traditional linear motors have only one degree of freedom, that is, thrust in only one direction. Please refer to Figure 1 to Figure 3 , the traditional linear motor mainly includes three parts: two back irons 1, two sets of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K41/02
Inventor 段素丙陈庆生刘小虎季汉川胡兵张霖
Owner SHANGHAI MICRO ELECTRONICS EQUIP (GRP) CO LTD
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