Electromagnetic actuator with redundant air gaps

An electromagnetic actuator and air gap technology, which is applied in the aerospace field, can solve the problems of large volume and mass of the actuator, and achieve the effects of easy installation and carrying application in aerospace, small size, and alleviating magnetic saturation

Active Publication Date: 2021-10-29
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the innovation of many patents on electromagnetic actuators is to improve the electromagnetic force coefficient by reshaping the air gap magnetic field, while ignoring the influence of the magnetic saturation of the yoke on the whole, resulting in a large volume and mass of the actuator.

Method used

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  • Electromagnetic actuator with redundant air gaps
  • Electromagnetic actuator with redundant air gaps
  • Electromagnetic actuator with redundant air gaps

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specific Embodiment approach 1

[0029] Specific implementation mode one: see Figure 1-5 This embodiment will be described.

[0030] figure 1 The radial cross-sectional view of the electromagnetic actuator that is the technical solution of the present invention is mainly composed of a stator and a mover. It is characterized in that the stator mainly includes: a stator frame 1, an end yoke 2, an outer magnetic ring 3, an outer magnetic Yoke 4, outer lower magnetic ring 5, outer magnetic ring 6, outer upper magnetic ring 7, outer upper magnetic yoke 8, outer lock nut 9, inner spacer magnetic ring 10, inner magnetic yoke 11, inner lower magnetic ring 12, inner magnetic Ring 13, inner upper magnetic ring 14, inner upper magnetic yoke 15, inner lock nut 16 and main air gap 17; the mover mainly includes: coil bobbin 18 and ring coil 19; the end yoke 2 is located at the bottom of the annular groove of stator frame 1 , the outer magnetic ring 3 is located at the axial upper end of the outer ring protrusion of the ...

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Abstract

The invention provides an electromagnetic actuator with redundant air gaps, which comprises a stator and a rotor, and is characterized in that the stator comprises a stator frame, a magnet yoke, a magnetism isolating ring, a magnet ring and a lock nut; the rotor comprises a coil framework and an annular coil. An upper permanent magnet branch magnetic circuit and a lower permanent magnet branch magnetic circuit are formed in a single-layer magnetic pole structure, permanent magnet flux shunting is achieved, overall magnetic saturation is relieved, the adopted magnetic isolation ring plays a role of redundant air gaps, local magnetic saturation of the magnet yoke is further relieved, the axial size and the radial size are effectively reduced, and installation and carrying are convenient. The electromagnetic actuator can be repeatedly used, is large in thrust density, is small in size, is light in weight, and achieves the time-sharing speed-regulation release of nano satellites with different masses.

Description

technical field [0001] The invention relates to an electromagnetic actuator with redundant air gaps, belonging to the technical field of aerospace. Background technique [0002] It has become a research hotspot in today's international aerospace field that multiple satellites work together to complete complex space exploration tasks, such as formations and clusters. In particular, CubeSat has the advantages of short development cycle and low cost. The cluster formed by it has high flexibility and robustness, and can complete tasks that large satellites cannot independently complete or require high costs. For nano-satellite on-orbit deployment tasks, in order to save costs, it is often necessary to use deployers to store and release a large number of nano-satellites in orbit during a launch mission. Since nano-satellites have weak orbit control capabilities and limited fuel, it is expected that when these nano-satellites are ejected and separated, the separation speed of the...

Claims

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Application Information

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IPC IPC(8): B64G1/64H01F3/00H01F3/14H01F3/10
CPCB64G1/645H01F3/00H01F3/14H01F3/10
Inventor 岳洪浩赵勇杨飞陆一凡吴君阮琪
Owner HARBIN INST OF TECH
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