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Ultra-low speed accurate arc electric motor for macrotype astronomical telescope

An astronomical telescope, ultra-low-speed technology, applied in the field of electric motors

Inactive Publication Date: 2008-05-07
NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

No crawling at low speeds

Method used

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  • Ultra-low speed accurate arc electric motor for macrotype astronomical telescope
  • Ultra-low speed accurate arc electric motor for macrotype astronomical telescope
  • Ultra-low speed accurate arc electric motor for macrotype astronomical telescope

Examples

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Embodiment 1

[0069] Embodiment 1, an ultra-low-speed precision arc motor for a large astronomical telescope, referring to Figures 1 and 2: the motor adopts a surface-mounted structure, and permanent magnets are pasted on the rotor. The number of poles of the motor is 120; the stator of the arc motor is composed of 15 "stator units", each of which is equivalent to an arc length of 46.07mm. Each stator adopts 9 pieces / 8 poles, and the armature windings are arranged according to UVWUVWUVW from right to left, and the three-phase winding 2 can be connected in star or delta. Each stator can be connected in series or in parallel according to the needs (generally star connection is used, which can eliminate the 3rd and 3rd multiple subharmonics). Each "stator block" is composed of 9 complete silicon steel sheets 1 and 2 silicon steel sheets 1-1 to reduce edge effects, that is, two silicon steel sheets 1-1 for eliminating edge effects are designed on the edge of the stator 1: The silicon steel she...

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Abstract

An ultra-low-speed and ultra-accurate-arc motor for a large-bore astronomical telescope is a large-torque alternating RE permanent-magnet synchronized servo motor. The present invention is composed of a rotor and a stator; the rotor is attached with a permanent magnet and adopts an adhesive structure; the number of pole pairs is 60 pairs and 120 poles; the stator is composed of 15 stator blocks, each block is equivalent to 46.07mm in arc length, each stator consists of 9 complete silicon steel plates and 2 silicon steel plates for reducing the edge effect; each stator adopts 9 plates / 8 poles winding mode and an armature winding is arranged according to UVWUVWUVW from right to left; the motor rotor is composed of 4 rotor blocks and has 120 magnetic steel plates in total; the magnetic steelplate adopts the torque design for reducing tooth space and is provided with a fastening device. The present invention achieves the arc movement directly driven by the large-bore astronomical telescope: low speed 1' / s; high speed 10degrees / s; speed change 30,000:1; positioning precision 0.1'; no creeping phenomenon.

Description

technical field [0001] The invention relates to a motor, in particular to an ultra-low-speed precision arc motor used for a large astronomical telescope. The invention is a national fund project, and the approval number is 10778629. Background technique [0002] The mechanical movement of the astronomical telescope when making observations is a kind of viewing angle tracking movement for the observed celestial bodies, and the range of movement (or movement distance) required by all astronomical telescopes for each observation generally does not exceed an arc of 180°. That is to say, the motion of the astronomical telescope during observation is an ultra-low-speed arc motion limited to an arc range. [0003] The traditional astronomical telescope tracking electromechanical structure mode adopts the conversion of rotary motion-arc motion; that is, the high-speed rotary motion of the motor is converted into ultra-low-speed arc motion through the transmission device. For examp...

Claims

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Application Information

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IPC IPC(8): H02K21/02H02K1/27H02K1/12H02K3/28G05D3/12G05B15/02
Inventor 张振超任长志朱震莲汪达兴王国民姚正秋胡伟
Owner NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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