| With the development of society,people pay more and more attention to energy saving and environmental protection.Developing energy-saving motors can reduce energy consumption.At present,an important direction of the traditional motor is to use amorphous alloy as the material of stator.Compared with the traditional silicon steel sheet,the thickness of amorphous alloy is only about 0.03 mm,which is about one tenth of that of silicon steel sheet.It has excellent iron consumption performance and has been widely used in electric power and other fields.Relevant research shows that transformer made of amorphous alloy material can reduce loss by more than 70% under no-load condition.However,amorphous alloys also have some shortcomings in properties,such as low saturation induction density,large magnetostriction and stress sensitivity.When amorphous alloys are used in motors,the vibration and noise of motors are obviously.In order to solve this problem,this paper mainly studies the type of vibration and noise of amorphous alloy high-speed permanent magnet synchronous motor.Starting from the mechanism of vibration and noise,the main source of vibration and noise of amorphous alloy high-speed permanent magnet synchronous motor is analyzed.The electromagnetic field and mechanical field analysis of amorphous alloy high-speed permanent magnet synchronous motor is carried out,which lays a foundation for the optimization of motor vibration and noise in the later stage.Firstly,the two-dimensional simplified model of amorphous alloy high-speed permanent magnet synchronous motor is carried out.The air-gap magnetic field of amorphous alloy high-speed permanent magnet synchronous motor is calculated analytically by using the method of separation of variables.Maxwell's stress method is used to solve the electromagnetic radial force in the air gap.The spatial distribution of radial electromagnetic force along the air gap is obtained.The finite element software ANSOFT Maxwell is used to simulate the simplified two-dimensional model,which verifies the correctness of the solution.The harmonic content of radial electromagnetic force and the corresponding frequency range are obtained by fast Fourier transform.Secondly,the modal analysis of this amorphous alloy high-speed permanent magnet synchronous motor is carried out.Firstly,the free mode analysis of amorphous alloy stator is carried out,and the first natural frequencies and modes of amorphous alloy stator are obtained.The validity of the elastic modulus of amorphous alloy stator is confirmed by experiments.Secondly,the modal analysis of the main components of the motor is carried out to obtain the relevant natural frequencies and modes,and the relevant frequency is also analyzed.Thirdly,analysis of vibration and noise analysis of amorphous alloy high-speed permanent magnet synchronous motor.Harmonic Response module based on ANSYS Workbench is used to analyze the vibration and noise.The vibration displacement and velocity response of the motor under the harmonic response analysis are obtained,and the total noise at the housing is calculated by using the velocity response.The sound field around the motor is analyzed.Finally,The vibration and noise analysis of the same type of silicon steel motor is established to compare the effects of different materials on motor vibration and noise.Then,the influence of slot width on the vibration and noise of amorphous alloy high-speed permanent magnet synchronous motor is analyzed.A model of four-type amorphous alloy high-speed permanent magnet synchronous motor with different slot widths is established,and the vibration and noise of four-type are obtained by finite element analysis.At the same time,the vibration and noise of the motor are analyzed and calculated under different rotating speeds.Based on the above analysis,a systematic analysis method for vibration and noise of amorphous alloy high-speed permanent magnet synchronous motor has been developed,which provides a reference for motor vibration and noise reduction.It lays a foundation for further optimization of motor vibration and noise. |
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