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直流無刷電機之六 (優缺點)

發布日期: 2021-01-22

直流無刷電機的優點電子換向來代替傳統的機械換向,性能可靠、永無磨損、故障率低,壽命比有刷電機提高了約6倍,代表了電動機的發展方向;屬靜態電機,空載電流小;效率高;體積小。

 

直流無刷電機的缺點低速起動時有輕微振動,如速度加大換相頻率增大,就感覺不到振動現象了;價格高,控制器要求高;易形成共振,因為任何一件東西都有一個固有振動頻率,如果無刷電機的振動頻率與車架或塑料件的振動頻率相同或接近時就容易形成共振現象,但可以通過調整將共振現象減小到最小程度。所以采用無刷電機驅動的電動車有時會發出一種嗡嗡的聲音是一種正常的現象。



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