Maneus-based motor different rotor chute settings and noise analysis
Based on the MANATEE software analysis platform, this paper analyzes the electromagnetic noise characteristics of a 80kW permanent magnet synchronous motor, and mainly analyzes the influence of the oblique pole on the motor noise. Through simulation, it is concluded that the linear segmented oblique pole is better than other oblique pole modes; after the linear segmented oblique pole, the electromagnetic force wave of the motor is not reduced except for the 8th order and the 2nd frequency, and other electromagnetic force waves are significantly reduced, especially The 8th order 10 times frequency; after the oblique pole, the motor noise resonance point is reduced from 3 to 1, and the maximum noise value is reduced from 75dB to 65dB.
Faced with the worldwide problem of resource shortage, scientific and technological personnel in various fields are constantly looking for alternative energy solutions. At the same time, electric vehicles use renewable energy as power, which largely solves the environmental pollution caused by burning gasoline in internal combustion engines. With the shortage of resources. In the whole system of electric vehicles, the electric motor becomes the main driving force component of the electric motor. Among them, the permanent magnet synchronous motor is widely used in electric vehicles due to its small size, light weight, high efficiency and flexible control. The permanent magnet synchronous motor for traction of electric vehicles is required to have low-speed, large-torque and high-speed constant-power operation capability. The high-current and high-speed field-weakening magnetic field distortion caused by low-speed and large-torque operating points may cause electromagnetic force acting on the motor structure. The increase in amplitude is likely to cause large electromagnetic vibration noise, which affects the noise performance of electric vehicles.
Based on the MANATEE software analysis platform, this paper analyzes the electromagnetic noise characteristics of a 80kW permanent magnet synchronous motor, and mainly analyzes the influence of the oblique pole on the motor noise. Through simulation, it is concluded that the linear segmented oblique pole is better than other oblique pole modes; after the linear segmented oblique pole, the electromagnetic force wave of the motor is not reduced except for the 8th order and the 2nd frequency, and other electromagnetic force waves are significantly reduced, especially The 8th order 10 times frequency; after the oblique pole, the motor noise resonance point is reduced from 3 to 1, and the maximum noise value is reduced from 75dB to 65dB.
In MANATEE, the influence of different rotor oblique and oblique pole angles on motor noise, air gap magnetic density and air gap radial force wave can be analyzed. Figure 1 shows the type of motor ramp that MANATEE can implement. They are: one-line linear oblique pole, one-word segmented oblique pole, V-shaped linear oblique pole, and custom oblique pole (according to sinusoidal oblique pole).
In order to analyze and suppress the vibration noise, the above various types of oblique poles are parameterized and optimized in the MANATEE software, and finally the optimal oblique pole type and oblique pole angle are obtained.
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