Switched reluctance motor with good anti-electromagnetic interference effect

Abstract

A switched reluctance motor with a good anti-electromagnetic interference effect disclosed by the present invention comprises a switched reluctance motor body, a placement box and a sealing box cover, the inner side wall of the switched reluctance motor body is provided with a stator iron core, and the middle part of the interior of the switched reluctance motor body is provided with a rotor iron core. A transmission shaft is connected in the rotor iron core in a penetrating mode, and the surface of the transmission shaft is sleeved with an anti-electromagnetic interference ring. According to the invention, through the arrangement of the anti-electromagnetic interference ring, the anti-electromagnetic interference layer and the electromagnetic interference shielding device, when a worker needs to reduce electromagnetic interference, the anti-electromagnetic interference ring can reduce the electromagnetism generated during rotation of the switched reluctance motor body to a certain extent; the anti-electromagnetic interference layer can further reduce the external electromagnetic interference, and meanwhile, after a worker connects the electromagnetic interference shielding device with an external power supply, the electromagnetic interference shielding device can further weaken the external electromagnetic interference, so that the electromagnetic interference resistance efficiency of the device is improved.

Description

technical field [0001] The invention relates to the technical field of switched reluctance motors, in particular to a switched reluctance motor with good anti-electromagnetic interference effect. Background technique [0002] Electromagnetic interference is electronic noise that interferes with cable signals and reduces the integrity of the signal. EMI is usually generated by electromagnetic radiation sources such as motors and machines. It mainly includes conducted interference and radiation interference. Conducted interference refers to a conductive medium. Signal coupling (interference) on an electrical network to another electrical network. Radiated interference refers to the interference source coupling (interfering) its signal to another electrical network through space. In high-speed PCB and system design, high-frequency signal lines, integrated circuit pins, various connectors, etc. may become antennas. The characteristic radiation interference source can emit elect...

AI Technical Summary

Problems solved by technology

The PTC thermistor provided on the back cover body of the present invention can provide thermal protection for the micro-motor, and prevent the micro-motor from being damaged due to excessive temperature rise in the case of overload and locked-rotor; the filter PCB board can Suppress the electromagnetic interference generated by the micro-motor during the working process and reduce the electromagnetic interference of the micro-motor; the components on the back cover body have a reasonable layout, compact structure, and convenient assembly, which can effectively improve the production efficiency of the micro-motor", but the device The anti-electromagnetic interference effect is poor, so that the switched reluctance motor is easily affected when it is working, and when the electromagnetic interference generated by the electromagnetic components in the external environment reaches a certain level, it may even cause damage to the motor, thereby reducing The service life of the motor;

[0005] 2. The comparative document CN210167917U discloses an anti-electromagnetic interference motor, "including, a rotor, which includes a rotating shaft, a coil assembly arranged on the rotating shaft, and a steering assembly arranged on the top of the rotating shaft; a stator , which includes a housing, an end cover at the top of the housing, and a mounting cavity formed in the housing, the rotor is rotatably mounted in the mounting cavity, and the stator also includes A first brush assembly and a second brush assembly arranged inside the end cover and in contact with the steering assembly, and a first lug and a second lug extending outward from the outside of the end cover and an anti-electromagnetic interference electronic assembly, which includes a first piezoresistor disposed on the steering assembly, a second piezoresistor disposed on the outside of the end cap, and a second piezoresistor disposed on the end cap An inductance and capacitance component inside the cover", but this device occupies a large amount of internal space of the motor, which increases the volume of the motor, affects the application range of the motor, and has limitations in actual use;

Through the setting of the electromagnetic shielding layer and the electromagnetic shielding cover, the present invention has the function of anti-electromagnetic interference, which ensures the reliability of the servo motor, but the connection of the device is poor, making it difficult for the staff to quickly fix it and install it. time-consuming and labor-intensive disassembly, which reduces the working speed

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