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                  电机上面的磁铁起什么作用？
                  

                  
发布日期：2019-12-30
阅读：3332


                  

                  电机磁铁如果确定是磁铁，那么这个芯片可能是霍尔开关。如果不是磁铁，这个芯片也有可能是光电开关之类的。后面的磁铁和芯片组合起来应该是计算转速的。磁铁的磁场每转一圈，磁场变化两次芯片能够感应到磁场的变化次数，从而计算出转〖速或者圈数。
                  

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