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Large spliced ​​arc motor rotor precise position detection system and its detection method

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

Inactive Publication Date: 2018-01-16
NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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  • Application Information

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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  • Large spliced ​​arc motor rotor precise position detection system and its detection method
  • Large spliced ​​arc motor rotor precise position detection system and its detection method
  • Large spliced ​​arc motor rotor precise position detection system and its detection method

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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

A large spliced ​​arc motor rotor precise position detection system and its detection method, the drive motor of the large astronomical telescope adopts a spliced ​​arc motor, and a photoelectric encoder is arranged on the spliced ​​arc motor rotor, which is characterized in that the The photoelectric encoder is an incremental photoelectric encoder with multiple reference points; the output of the incremental photoelectric encoder with multiple reference points is isolated by photoelectric coupling, and the signal power is buffered by a long-line driver , after transformation, the rotor position signal is sent to the relevant interface of DSP. The beneficial effects of the present invention are: the photoelectric encoder with multiple reference points can be applied to spliced ​​arc motors of any size to detect the magnetic pole position of the motor rotor, and the corresponding number of reference points can be selected according to the number of magnetic pole pairs of the rotor to simplify the rotor position Calculation, save the calculation speed of the control, and achieve the purpose of fast, accurate and simple detection of the rotor magnetic pole position.

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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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/04H02P21/14H02P25/02H02K11/20
Inventor 宋晓莉汪达兴张超
Owner NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE