例句與造句

1. Then one of the methods of rotor position detection - bemf zero crossing point detection is explained in detail . in succession , the chapter dissertates the method of measuring phase voltage and supply voltage , and analyses the error of rotor position using this method
   對(duì)轉(zhuǎn)子位置檢測(cè)方法中的反電勢(shì)過零點(diǎn)法作了比較詳細(xì)的介紹，討論了反電勢(shì)法中相電壓和端電壓的檢測(cè)方法，并分析了利用該方法時(shí)而產(chǎn)生的轉(zhuǎn)子位置檢測(cè)誤差。
2. In this chapter , the method of bldcm rotor position detection is first discussed . then the principle and algorithm of bemf zero crossing point detection is explained . in succession , the chapter dissertates the software realization of the bemf zero crossing point detection algorithm , the software disturbance filter and the modification of phase displacement , and the software realization of commutation point
   在這一章中，先簡(jiǎn)述了無刷直流電機(jī)的轉(zhuǎn)子位置器檢測(cè)方法；然后論述了反電動(dòng)勢(shì)過零檢測(cè)原理和算法以及該算法的軟件實(shí)現(xiàn)、軟件濾波和相移修正、換相點(diǎn)的軟件實(shí)現(xiàn)；最后對(duì)軟件開環(huán)換相起動(dòng)策略作了詳細(xì)論述。
3. High - frequency link power converters are receiving increasing attention . when the input frequency of ac - ac converter is quite high , such as 20khz or above , in order to make sure the converter switching action is restricted to the zero crossing point of the link voltage , the switching cycle becomes discrete pulse spectrums , however , the conventional pwm converters are ruled out because they would fail either to the efficiency or the low - distortion criteria
   當(dāng)交-交變頻器的輸入頻率非常高，通常為20khz時(shí)，為了在零電壓條件下實(shí)現(xiàn)逆變器開關(guān)管的通斷，變換器的開關(guān)時(shí)刻必須選擇在高頻交流電壓脈沖為零時(shí)，這意味著變換器開關(guān)時(shí)刻在時(shí)間軸上成為不連續(xù)的點(diǎn)，而常規(guī)的硬開關(guān)pwm變換器是將開關(guān)時(shí)刻選擇在任意時(shí)刻。
4. The chip jk3ce that is one of micro - controllers in motorola 68hc08 family is used as control unit in this system . the zero crossing point of the back emf can be obtained by comparing the terminal voltage with the virtual neutral point , then using the software of the system can figure out the commutation period . the electronic commutation replaces the mechanical commutation in this way
   本系統(tǒng)采用的控制芯片為motorola系列單片機(jī)中的jk3ce ，反電勢(shì)過零點(diǎn)可以通過比較電機(jī)端電壓和虛擬中點(diǎn)電壓來得到，將過零點(diǎn)信號(hào)送往單片機(jī)捕捉端口后由系統(tǒng)軟件來確定換相時(shí)刻，這樣就可以由電子換向裝置替代機(jī)械換相裝置，有利于提高系統(tǒng)運(yùn)行的可靠性，并降低了系統(tǒng)維護(hù)的費(fèi)用。
5. It's difficult to find zero cross point in a sentence. 用zero cross point造句挺難的