NLR Noise Load Ratio

Although no load noise does not change obviously,the abnormal birdie phenomenon in the load noise of the motor is eliminated.

YB31 5～ 355— 4 p电动机的槽配合由 72 / 6 4调整为 72 / 6 3,空载噪声虽无明显变化 ,但消除了负载噪声中的异常尖叫现象 ,措施简单、快捷、经济 ,效果明