直流有刷電機和無刷電機有什么區(qū)別?
直流有刷電機和無刷電機有什么區(qū)別?直流有刷電機和無刷電機的主要區(qū)別是：是否配置有常用的電刷-換向器。
有刷直流電機的換向一直是通過石墨電刷與安裝在轉子上的環(huán)形換向器相接觸來實現(xiàn)的。而直流無刷電機則通過霍爾傳感器把轉子位置反饋回控制電路，使其能夠獲知電機相位換向的準確時間。大多數(shù)無刷電機生產商生產的電機都具有三個霍爾效應定位傳感器。由于無刷電機沒有電刷，故也沒有相關接口，因此更干凈，噪聲更小，事實上無需維護，壽命更長。
其次，直流無刷是基于交流調速原理基礎上制造出來的，性能方面既有直流電機的啟動轉矩大，轉速穩(wěn)定調速方便，又有交流電機的結構簡單沒有易損件(沒有直流電機的碳刷)
第三，價格方面。因為需要專門的驅動電路驅動故價格要比普通直流電機高3~4倍左右。
第四，技術層面。因為直流無刷電機大部分都自帶驅動電路(可以調速，當然也有恒速的)所以驅動起來只要給它接上額定電壓后，輸入調速PWM信號就可以了。這點無需再添加專門的驅動電路。另外，直流無刷電機因為有霍爾元件做反饋所以轉速幾乎是穩(wěn)定恒速的。
新聞:張掖繡花機專用步進電機HSTM57-1.8-S-41-4-2.8價格
對于減速機外殼端面密封措施一般有以下幾種：
①接合端面裝配時涂成墊效果好的密封膠，且在密封膠固化前不得加入潤滑脂試運轉；
②提高各接合端面相關零件的行為公差，保證止口的配合松緊度，嚴格去除零件的各部飛邊毛刺；
③零件及接合面須清洗干凈，晾干后裝配，裝配時采取保護措施，接合面不能造成二次污染；
④接合面部位的緊固件必須達到設計的擰緊力矩，且圓周緊固方式符合規(guī)范；
⑤加大或加密緊固件的圓周布置，增加端面之間的預應力；
⑥端面之間相互受扭力較大的接合面布置圓柱銷或彈性銷，防止接合端面之間的密封在相互作用的反扭矩下產生微小的移動，而使端面密封失效；
⑦在端面接合部位的止口上增加o 形圈實現(xiàn)徑向密封。
⑧在端面接合部位的端面上增加o形圈實現(xiàn)端面密封。
新聞:張掖繡花機專用步進電機HSTM57-1.8-S-41-4-2.8價格
精明之選窗臺石材選購需知如果認定了家里的窗臺裝修要選擇某種石材，也知道了通過測量窗臺面積確定石材的面積，那么就為選購到合適的石材做好了基本的準備。下面我們就來看看，選購窗臺石材，還需要注意哪些問題。選定購買方式窗臺石材的購買方式有兩種，一種是選擇讓商家上門服務，一種是自己去石材市場挑選加工，然后運回來自己或請人安裝，兩種方式各有利弊。問價問清楚選購窗臺石材時一定要把以下幾項談清楚：板材的價格;磨邊的費用;安裝的費用;是否加損耗，加多少;掏孔、打磨、粘接的費用;切口費;防護的費用;運輸?shù)馁M用;上門測量是否要交定金。
新聞:張掖繡花機專用步進電機HSTM57-1.8-S-41-4-2.8價格
CH400-3-S-B-G4-DL-H9
CH400-5-S-B-G4-DL-H9
CH400-10-S-B-G4-DL-H9
CH400-15-S-B-G4-DL-H9
CH400-20-S-B-G4-DL-H9
CH400-25-S-B-G4-DL-H9
CH400-30-S-B-G4-DL-H9
CH400-40-S-B-G4-DL-H9
CH400-45-S-B-G4-DL-H9
CH400-50-S-B-G4-DL-H9
CH400-60-S-B-G4-DL-H9
CH400-70-S-B-G4-DL-H9
CH400-80-S-B-G4-DL-H9
CH400-90-S-B-G4-DL-H9
CH400-100-S-B-G4-DL-H9
CH400-120-S-B-G4-DL-H9
CH400-140-S-B-G4-DL-H9
CH400-160-S-B-G4-DL-H9
CH400-180-S-B-G4-DL-H9
CH400-200-S-B-G4-DL-H9
CH750-3-S-B-G4-DL-H9
CH750-5-S-B-G4-DL-H9
CH750-10-S-B-G4-DL-H9
CH750-15-S-B-G4-DL-H9
CH750-20-S-B-G4-DL-H9
CH750-25-S-B-G4-DL-H9
CH750-30-S-B-G4-DL-H9
CH750-40-S-B-G4-DL-H9
CH750-45-S-B-G4-DL-H9
CH750-50-S-B-G4-DL-H9
CH750-60-S-B-G4-DL-H9
CH750-70-S-B-G4-DL-H9
CH750-80-S-B-G4-DL-H9
CH750-90-S-B-G4-DL-H9
CH750-100-S-B-G4-DL-H9
CH750-120-S-B-G4-DL-H9
CH750-140-S-B-G4-DL-H9
CH750-160-S-B-G4-DL-H9
CH750-180-S-B-G4-DL-H9
CH750-200-S-B-G4-DL-H9
CH1500-3-S-B-G4-DL-H9
CH1500-5-S-B-G4-DL-H9
CH1500-10-S-B-G4-DL-H9
CH1500-15-S-B-G4-DL-H9
CH1500-20-S-B-G4-DL-H9
CH1500-25-S-B-G4-DL-H9
CH1500-30-S-B-G4-DL-H9
CH1500-40-S-B-G4-DL-H9
CH1500-45-S-B-G4-DL-H9
CH1500-50-S-B-G4-DL-H9
CH1500-60-S-B-G4-DL-H9
CH1500-70-S-B-G4-DL-H9
CH1500-80-S-B-G4-DL-H9
CH1500-90-S-B-G4-DL-H9
CH1500-100-S-B-G4-DL-H9
CH1500-120-S-B-G4-DL-H9
CH1500-140-S-B-G4-DL-H9
CH1500-160-S-B-G4-DL-H9
CH1500-180-S-B-G4-DL-H9
CH1500-200-S-B-G4-DL-H9
CH2200-3-S-B-G4-DL-H9
CH2200-5-S-B-G4-DL-H9
CH2200-10-S-B-G4-DL-H9
CH2200-15-S-B-G4-DL-H9
CH2200-20-S-B-G4-DL-H9
CH2200-25-S-B-G4-DL-H9
CH2200-30-S-B-G4-DL-H9
CH2200-40-S-B-G4-DL-H9
CH2200-45-S-B-G4-DL-H9
CH2200-50-S-B-G4-DL-H9
CH2200-60-S-B-G4-DL-H9
CH2200-70-S-B-G4-DL-H9
CH2200-80-S-B-G4-DL-H9
CH2200-90-S-B-G4-DL-H9
CH2200-100-S-B-G4-DL-H9
CH2200-120-S-B-G4-DL-H9
CH2200-140-S-B-G4-DL-H9
CH2200-160-S-B-G4-DL-H9
CH2200-180-S-B-G4-DL-H9
CH2200-200-S-B-G4-DL-H9
EXLAR行星絲杠配置簡單單一的控制系統(tǒng)，便帶來了的優(yōu)越性。并不需要諸如閥門、泵、過濾器、傳感器等復雜的配套系統(tǒng)。EXLAR電動缸體積小，工作壽命長，日常無需維護，不存在液壓缸的液體滲漏情況，噪音顯著減小。行星滾柱絲杠與滾珠絲杠的性能對比：負載與硬度：行星滾柱絲杠為受力多線接觸，而滾珠絲杠為受力多點接觸。接觸面的增加，行星滾柱絲杠的承載能力和剛性將大大提高。在實際的應用中，對于相同的負載，設計者選擇EXLAR電動缸將節(jié)約2/3的空間。
新聞:張掖繡花機專用步進電機HSTM57-1.8-S-41-4-2.8價格
CH400-3-S-B-G1-LD-H0
CH400-5-S-B-G1-LD-H0
CH400-10-S-B-G1-LD-H0
CH400-15-S-B-G1-LD-H0
CH400-20-S-B-G1-LD-H0
CH400-25-S-B-G1-LD-H0
CH400-30-S-B-G1-LD-H0
CH400-40-S-B-G1-LD-H0
CH400-45-S-B-G1-LD-H0
CH400-50-S-B-G1-LD-H0
CH400-60-S-B-G1-LD-H0
CH400-70-S-B-G1-LD-H0
CH400-80-S-B-G1-LD-H0
CH400-90-S-B-G1-LD-H0
CH400-100-S-B-G1-LD-H0
CH400-120-S-B-G1-LD-H0
CH400-140-S-B-G1-LD-H0
CH400-160-S-B-G1-LD-H0
CH400-180-S-B-G1-LD-H0
CH400-200-S-B-G1-LD-H0
CH750-3-S-B-G1-LD-H0
CH750-5-S-B-G1-LD-H0
CH750-10-S-B-G1-LD-H0
CH750-15-S-B-G1-LD-H0
CH750-20-S-B-G1-LD-H0
CH750-25-S-B-G1-LD-H0
CH750-30-S-B-G1-LD-H0
CH750-40-S-B-G1-LD-H0
CH750-45-S-B-G1-LD-H0
CH750-50-S-B-G1-LD-H0
CH750-60-S-B-G1-LD-H0
CH750-70-S-B-G1-LD-H0
CH750-80-S-B-G1-LD-H0
CH750-90-S-B-G1-LD-H0
CH750-100-S-B-G1-LD-H0
CH750-120-S-B-G1-LD-H0
CH750-140-S-B-G1-LD-H0
CH750-160-S-B-G1-LD-H0
CH750-180-S-B-G1-LD-H0
CH750-200-S-B-G1-LD-H0
CH1500-3-S-B-G1-LD-H0
CH1500-5-S-B-G1-LD-H0
CH1500-10-S-B-G1-LD-H0
CH1500-15-S-B-G1-LD-H0
CH1500-20-S-B-G1-LD-H0
CH1500-25-S-B-G1-LD-H0
CH1500-30-S-B-G1-LD-H0
CH1500-40-S-B-G1-LD-H0
CH1500-45-S-B-G1-LD-H0
CH1500-50-S-B-G1-LD-H0
CH1500-60-S-B-G1-LD-H0
CH1500-70-S-B-G1-LD-H0
CH1500-80-S-B-G1-LD-H0
CH1500-90-S-B-G1-LD-H0
CH1500-100-S-B-G1-LD-H0
CH1500-120-S-B-G1-LD-H0
CH1500-140-S-B-G1-LD-H0
CH1500-160-S-B-G1-LD-H0
CH1500-180-S-B-G1-LD-H0
CH1500-200-S-B-G1-LD-H0
CH2200-3-S-B-G1-LD-H0
CH2200-5-S-B-G1-LD-H0
CH2200-10-S-B-G1-LD-H0
CH2200-15-S-B-G1-LD-H0
CH2200-20-S-B-G1-LD-H0
CH2200-25-S-B-G1-LD-H0
CH2200-30-S-B-G1-LD-H0
CH2200-40-S-B-G1-LD-H0
CH2200-45-S-B-G1-LD-H0
CH2200-50-S-B-G1-LD-H0
CH2200-60-S-B-G1-LD-H0
CH2200-70-S-B-G1-LD-H0
CH2200-80-S-B-G1-LD-H0
CH2200-90-S-B-G1-LD-H0
CH2200-100-S-B-G1-LD-H0
CH2200-120-S-B-G1-LD-H0
CH2200-140-S-B-G1-LD-H0
CH2200-160-S-B-G1-LD-H0
CH2200-180-S-B-G1-LD-H0
CH2200-200-S-B-G1-LD-H0
