作业帮英语翻译In fact,brushes are the bad news.True,ther'rea clever way to ensure that.asthe rotor turns,the curreent is automatically switched around the windings to ensure the motor keeps turning.However,everything else about them is bad:they are noi
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/28 11:39:48
英语翻译In fact,brushes are the bad news.True,ther'rea clever way to ensure that.asthe rotor turns,the curreent is automatically switched around the windings to ensure the motor keeps turning.However,everything else about them is bad:they are noi
英语翻译
In fact,brushes are the bad news.True,ther'rea clever way to ensure that.asthe rotor turns,the curreent is automatically switched around the windings to ensure the motor keeps turning.However,everything else about them is bad:they are noisy,create friction,generate electrical interference(because of the sparking)and reduce efficiency (because there will always be a voltage drop across the brushes).Not only that,but they eventually wear out.With modern electronics,we can instead sense the position of the rotor(for example,with a Hall-effect device),then switch the current with,for example,a MOSFET transistor.
英语翻译In fact,brushes are the bad news.True,ther'rea clever way to ensure that.asthe rotor turns,the curreent is automatically switched around the windings to ensure the motor keeps turning.However,everything else about them is bad:they are noi
事实上,电刷有他们的缺点.是的,确保电刷随着转子转动,电流会自动变向来保证点击的转动.但是,很不好的地方就在于他们太吵了,而且产生巨大的摩擦力和电火花并因此降低了效率（因为在电刷上总是有一个电势降落.不仅如此,最终还会导致点击的磨损.在现在电子学中,我们用了别的方法来感应转子的位置（比如说用霍尔效应感应器件）,然后通过一个MOSFET晶体管来改变电流的方向.
MOSFET是金属氧化物半导体场效应管
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