Multi-stator arc motor for photoelectric tracking equipment

Abstract

The invention relates to a multi-stator arc motor for photoelectric tracking equipment. The multi-stator arc motor is an alternating current permanent magnetic synchronous arc linear motor comprising arc silicon steel sheets, coil windings, permanent magnets, back iron and stator shells. Four stator structures are in the same form and comprise the arc silicon steel sheets, the windings and the stator shells. Rotors comprise the permanent magnets and the back iron, and the 64 permanent magnets (32 pairs) are stuck to the external surface of the back iron. The minimum air gap between each rotorand each stator is 1.2mm, and the effective thickness of the complete device is 50mm. The complete motor adopts a fractional slot structural design, and the shape of the permanent magnets, the lengthof each stator and the shape of a slot are optimally designed by finite elements, thereby greatly reducing the torque fluctuation caused by end effect and slot effect; each stator has 11 poles and 10slots; and the windings are wound in an AaaAAaBbbBBbCccCCc mode to ensure that the space phase difference of a three-phase winding is 120 degrees. The four stators are installed in a staggered arrangement mode and can well reduce the torque fluctuation and radial attraction.

Description

technical field [0001] The invention belongs to the field of motor design and relates to a multi-stator arc motor used for photoelectric tracking equipment. Background technique [0002] The transmission methods used by traditional photoelectric tracking equipment mainly include: worm gear transmission, gear transmission, friction transmission and torque motor coaxial installation transmission. These traditional transmission methods have played a pivotal role in the development of photoelectric tracking equipment, but there are still many shortcomings in these transmission methods, especially when developing a new generation of large-scale photoelectric tracking equipment with the continuous advancement of science and technology. These transmission modes are no longer competent. When the worm gear transmission mode is used, the size of the turbine is difficult to make large, and the accuracy of the large size turbine is difficult to be guaranteed. For large-scale photoelect...

AI Technical Summary

Problems solved by technology

Worm gear transmission is no longer suitable for modern large-scale photoelectric tracking equipment with higher and higher control requirements; although friction transmission overcomes the Achilles heel of worm gear transmission, poor transmission stiffness, low-speed crawling and slippage are its own Achilles heel, low-speed Crawling will affect motion stability and transmission accuracy, while slipping will cause the image of the observation target to shake in the field of view, and in severe cases, the image will drift out of the field of view; Problems such as backlash, high-frequency tooth profile error, and high tooth surface contact stress; when a torque motor is used for coaxial installation and transmission, due to the large number of poles, large diameter, and many brushes of the traditional high-torque low-speed rotating motor, the resulting The frictional moment and inertia are large, which makes the control system a serious non-linearity, making it difficult to achieve high-precision tracking

At the same time, as the size of the motor increases, it will bring a lot of inconvenience to the processing and transportation of the motor, which will increase the manufacturing cost of the motor.

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