Detection system for accurate position of rotor of large spliced arc motor and detection method of detection system

A rotor position detection and splicing technology, applied in electromechanical devices, control systems, control generators, etc., can solve the problem of inability to make hybrid photoelectric encoders, and achieve the effect of saving calculation speed, simple detection, and simplified calculation

Active Publication Date: 2015-08-26
NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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AI Technical Summary

Problems solved by technology

The diameter of the spliced ​​direct drive motor reaches as much as 10 to 30 meters, and there is no suitable hybrid encoder to choose from. Due to the constraints of technology and materials, photoelectric encoder companies cannot make spliced ​​arcs according to conventional methods. Hybrid photoelectric encoder for drive motor

Method used

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  • Detection system for accurate position of rotor of large spliced arc motor and detection method of detection system
  • Detection system for accurate position of rotor of large spliced arc motor and detection method of detection system
  • Detection system for accurate position of rotor of large spliced arc motor and detection method of detection system

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Embodiment 1

[0028]Embodiment 1, a detection system for the rotor magnetic pole position of a spliced ​​arc motor for a large astronomical telescope. The spliced ​​arc motor is a self-developed multi-pole permanent magnet synchronous motor. The present invention is designed to detect the rotor magnetic pole position of the spliced ​​arc motor The system requires fast, simple and real-time detection of the rotor magnetic pole position of the permanent magnet synchronous motor. The vector control method is used to control the three-phase current amplitude and phase of the stator winding according to the precise position of the rotor magnetic pole measured in real time, so as to ensure the large-scale astronomical The telescope drive system runs smoothly.

[0029] The system first subdivides and anti-interferences the incremental encoder signal with multiple reference points, and sends it to the encoder signal processing interface of the DSP, which is converted by the DSP into the precise posi...

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Abstract

The invention discloses a detection system for an accurate position of a rotor of a large spliced arc motor and a detection method of the detection system. A driving motor of a large astronomical telescope adopts the spliced arc motor and a photoelectric encoder is arranged on the rotor of the spliced arc motor. The detection system is characterized in that the photoelectric encoder is an incremental photoelectric encoder provided with a plurality of reference points; output of the incremental photoelectric encoder provided with the reference points is photoelectrically coupled and isolated; signal power is buffered by a line driver; and a rotor position signal is transmitted to a relevant port of a DSP (digital signal processor) after conversion. The detection system and the detection method have the benefits that the photoelectric encoder provided with the reference points can be applied to the spliced arc motor in any size for detection of a position of a rotor pole, and the corresponding reference points can be selected according to pole pairs of the rotor, so that rotor position calculation is simplified, the controlled calculation speed is saved, and a purpose of rapidly, accurately and simply detecting the position of the rotor pole is achieved.

Description

technical field [0001] The invention relates to a precise position detection of the rotor magnetic poles of a spliced ​​arc motor, in particular to a spliced ​​arc permanent magnet synchronous motor rotor magnetic pole position detection system used for driving a large astronomical telescope rack; the invention also relates to such a system The detection method of the rotor magnetic pole position detection system. This invention is funded by National Natural Science Foundation of China Project 11303065. Background technique [0002] With the increase of the aperture of the telescope, the volume and self-weight of the telescope body continue to increase. The static resistance moment and dynamic moment of inertia of the telescope increase in a quadratic relationship with the increase of the aperture of the telescope. Different from the load characteristics of general motors, the direct drive load of large astronomical telescopes has the characteristics of large static load to...

Claims

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Application Information

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IPC IPC(8): H02P21/04H02P21/14H02P25/02H02K11/00
Inventor 宋晓莉汪达兴张超
Owner NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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