A phase - locked - loop - based model reference adaptive system for speed estimation of sensorless induction motor drives 一種基于鎖相環(huán)原理的參考模型自適應(yīng)感應(yīng)電機(jī)轉(zhuǎn)速估計(jì)方法
It introduces the method of modulated light subtracting infrared radiation of atmosphere and background as well as the method of phase - lock - loop detecting feebleness signal 采用光路差分調(diào)制的方法實(shí)時(shí)扣除背景紅外輻射,并采用鎖定放大器進(jìn)行微弱信號(hào)的檢測(cè)。
The design of the scheme is mainly in consideration of good adaptability for variable transmission systems . chapter 3 introduces the digital phase - locked - loop used in the modulator scheme 方案設(shè)計(jì)的重點(diǎn)在于方案的靈活性,使之能夠?qū)Σ煌膫鬏旙w制具有盡量好的適應(yīng)性和可移植性。
Secondly , the power regulation circuit is discussed in detail , and the high frequency phase - shift power regulation circuit is studied detailedly . lastly , the frequency - tracing circuit is designed with phase - locked - loop 其次,對(duì)高頻串聯(lián)逆變電源的功率調(diào)節(jié)問(wèn)題進(jìn)行了詳細(xì)地討論,并仔細(xì)地研究了高頻情況下移相調(diào)功的問(wèn)題。
Since commercial pll ic came out , phase - locked - loop frequency synthesis has become widely accepted . but when narrow frequency - step is required , the loop bandwidth has to decrease while cannot meet the demand of frequency - hopping speed 數(shù)字鎖相集成器件出現(xiàn)以來(lái),鎖相式頻率合成器得到迅速發(fā)展,但是當(dāng)需要窄頻率步進(jìn)時(shí),環(huán)路帶寬需要降低,致使鎖定時(shí)間變長(zhǎng),不能滿足快速跳頻的要求。