2results about How to "Avoid electromagnetic noise" patented technology

The utility model discloses a concrete vibrating device, and relates to the technical field of building construction. The device comprises a handle, one end of the handle is fixedly connected with a hose, and the other end of the hose is fixedly connected with a vibrating rod; a driving assembly is arranged in an inner cavity of the vibration rod. The ultrasonic motor is adopted to replace a traditional electromagnetic motor, electromagnetic noise generated by the traditional electromagnetic motor is avoided from the source, meanwhile, the sound control sensor is used for monitoring the noise condition of the surrounding environment in real time, and when the noise exceeds a preset threshold value, a variable-frequency electric appliance in the feedback control assembly feeds back signals according to the sound control sensor; according to the utility model, the signal output to the vibration frequency speed regulation plate is adjusted, and then the current frequency output to the ultrasonic motor is adjusted in real time, and the vibration frequency of the vibration rod is changed, so that the purpose of reducing noise is achieved, the noise can be controlled at a lower level even in high-strength vibration operation, and the influence on the surrounding environment and constructors is greatly reduced.

The utility model discloses a supercharged motor that can reduce noise. The supercharged motor comprises a shell, a rotor assembly, a stator assembly and an impeller. The shell is provided with an air duct. The air duct is provided with a mounting pipeline. The stator assembly comprises a stator core and a coil winding wound on the stator core. The outer end surface of the stator core and the inner end surface of the mounting pipeline are integrated. The other end of the mounting pipeline is sleeved with a bearing seat. The rotor assembly comprises a shaft and a magnet fixedly installed on the shaft. One end of the shaft penetrates through the center of the bearing seat and is connected with the impeller. The utility model directly integrates the stator core and the mounting pipeline, so that the position deviation of the stator core during subsequent installation or work can be avoided, and the occurrence of electromagnetic noise can be avoided. The same axis design ensures the stability of the rotation of the impeller, thereby reducing noise.