A calculation method of electromagnetic vibration noise of electric machine

A technology of electromagnetic vibration and calculation method, which is applied in calculation, design optimization/simulation, electrical digital data processing, etc., and can solve problems such as consumption, low efficiency, and large computing resources

Active Publication Date: 2019-01-15
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

Although the finite element method has high calculation accuracy, it requires multi-physics calcula

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  • A calculation method of electromagnetic vibration noise of electric machine
  • A calculation method of electromagnetic vibration noise of electric machine
  • A calculation method of electromagnetic vibration noise of electric machine

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Embodiment Construction

[0066] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0067] The electromagnetic force in the motor mainly acts on the interface between the motor electronics, the rotor and the air gap. Taking the 12-slot 10-pole outer stator inner rotor permanent magnet motor as an example, its cross-sectional view is as follows figure 1 As shown, including: stator yoke, stator teeth, stator slots, air gap, magnetic poles and rotor yoke, the force that causes the...

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Abstract

The invention discloses a method for calculating the electromagnetic vibration noise of a motor, which comprises the following steps: calculating the distribution of the electromagnetic force densityof the motor according to the operation condition of the motor, and calculating the static deformation and the natural frequency of the motor respectively; according to the distribution of the electromagnetic force density, the electromagnetic resultant force on the stator teeth of the motor is calculated, and the time-space harmonic of the electromagnetic resultant force is calculated. The frequency response function of the motor structure corresponding to each vibration mode is calculated according to the natural frequencies of each vibration mode corresponding to each spatial order of the electromagnetic force, and the transfer function of the motor mechanical structure is calculated according to the static deformation function and the frequency response function. The vibration displacement of the motor surface is calculated according to the time-space harmonics and the transfer function. The modal acoustic radiation efficiency of the motor housing is obtained, and the electromagnetic vibration noise of the motor is calculated according to the modal acoustic radiation efficiency and vibration displacement. In the process of analyzing the vibration and noise of the motor, the invention ensures that the calculation accuracy meets the precision requirement, and reduces the calculation amount to avoid consuming a large amount of calculation resources.

Description

technical field [0001] The invention belongs to the field of motors, and more specifically relates to a calculation method for electromagnetic vibration noise of a motor. Background technique [0002] Motors are widely used in all aspects of social production and life, such as power generation, transportation, industrial and agricultural production, and household appliances. There are many types of motors, including induction motors, electric excitation synchronous motors, permanent magnet motors, reluctance motors, etc. Although these motors have different structures, they all work based on the principle of electromagnetic induction. When the motor is running, an alternating magnetic field is generated inside, and these alternating magnetic fields generate alternating electromagnetic force, which causes the motor to generate vibration and noise. The vibration and noise of the motor will cause many hazards, such as loosening of the motor winding and iron core, wear of insul...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 方海洋李大伟徐云松曲荣海
Owner HUAZHONG UNIV OF SCI & TECH
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