自冷式三相异步电动机是工业上应用最广的一种电机。而电动机在运转中产生的噪声是有损于操作工人的健康的。电动机运转中产生的噪声是由空气动力性噪声、电磁性噪声和机械噪声三部分组成,其中以空气动力性噪声最为强烈。不少资料报道过控制电机噪声的方法,通常多偏重于在电视尾部加装消声器或其它消 Self-cooled three-phase asynchronous motor is the industry’s most widely used motor. The motor noise generated during operation is detrimental to the health of the operating workers. The noise generated during motor operation consists of aerodynamic noise, electromagnetic noise and mechanical noise. Among them, aerodynamic noise is the most intense. A lot of information reported that the method of controlling the motor noise, usually more emphasis on the rear of the television with muffler or other consumer