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提出一种爪极电机气动噪声的计算及分析方法,与试验进行对比,验证该数值模拟计算的准确性及可行性;运用该方法探究爪极倒角对电机整体气动噪声的影响,并进行噪声优化。运用Fluent计算爪极电机的流场分布以及声源信息;运用Virtual_lab采用边界元法计算声场大小。分别计算爪极有无倒角两种模型的声场,发现在主要阶次上有倒角的模型噪声均有所下降,倒角结构使得电机进气口处的噪声源得到削弱,相比无倒角的模型降低了10樼20 d B(A),进而使远场噪声下降3 d B(A),对爪极电机的气动噪声起到一定的优化降噪作用。
A method to calculate and analyze the aerodynamic noise of claw pole motor is proposed. Compared with the experimental results, the accuracy and feasibility of the numerical simulation are verified. The effect of the claw pole chamfer on the aerodynamic noise of the motor is investigated and the noise optimization. Using Fluent to calculate claw pole motor flow field distribution and sound source information; the use of Virtual_lab using boundary element method to calculate the sound field size. The acoustic fields of the two models with and without chamfering are calculated respectively. It is found that the chamfering model noise in the main order decreases. The chamfering structure reduces the noise source at the motor inlet, The model of the angle is reduced by 10 樼 20 d B (A), and the far-field noise is reduced by 3 d B (A), which can reduce the aerodynamic noise of the claw pole motor.