無刷直流電機控制解決方案的新進展

　　無刷直流電機正迅速成為要求高可靠性、高效率和高功率體積比的應(yīng)用的自然選擇。電機提供了廣泛的速度范圍內(nèi)的扭矩和共享類似的扭矩和速度性能曲線特性刷電機（雖然拉絲電機提供更多的扭矩從靜止）。

　　一種無刷直流電動機從消除傳統(tǒng)直流電動機換電刷中獲得了顯著的可靠性。電刷磨損，降低了電機的性能，最終不得不更換。相反，當在額定參數(shù)下運行時，BLDC電機的壽命可以超過10000小時或更多。這種長壽，以及隨后的維修和備件成本的減少，可以抵消比傳統(tǒng)的電機更高的初始成本的電動機。

　　BLDC motors are now making their way into the most cost-conscious applications. For example， in the automotive sector， the use of BLDC motors is skyrocketing. Car makers are particularly attracted by the motor’s efficiency at converting electrical energy in mechanical work， which helps lower the demand on the vehicle’s power system （Figure 1）。 According to analyst IMS research， 600 million BLDC motors will be used in internal combustion engine-powered light vehicles by 2018 compared with 200 million units in 2011. （Larger versions of BLDC motors are already common in electric and hybrid vehicles.）