無刷無環(huán)起動器把傳統(tǒng)的、繁瑣的、多觸點元件組成的起動裝置去掉,采用無刷無環(huán)運行,操作簡單,安裝拆卸方便,可大大減少維修費用,其優(yōu)點是:去掉滑環(huán)、碳刷、刷盒、刷盒支架、短路環(huán)及二次回路系統(tǒng)中的頻敏變阻器、交流接觸器、時間繼電器等元件,并可保持電機原有的運行特性。
ADVANTAGE OF PRODUCTION
No brush No ring starter remove the traditional 、complicated、multiconduction component starting equipment. it is easy to operate and install, less repairing expense. the advantage is: to keep the original operation without rings、carbon brush、brush box、brush box shell、short circuit ring and ajustable rheostat frequency sensitive rheostat on secondary loop system AC connector and time relay.
主要技術(shù)參數(shù)
額定頻率:50Hz
額定電壓:380V
配用電機功率:15-125KW
a.輕載:0.6Me≤M≤0.8Me 、2.5Ie b.重載:1.6Me≤M≤2.0Me 、3.0Ie
MAIN TECHNICAL PARAMETER
Rated Frequency: 50Hz
Rated Voltege: 380V
Adapt Motor Power: 15-125KW
a.light load: 0.6Me≤M≤0.8Me 、2.5Ieb.heavy load: 1.6Me≤M≤2.0Me 、3.0Ie
性能特點
無刷無環(huán)起動器的工作原理是利用電動機在起動過程中,轉(zhuǎn)子電流頻率 fz 隨轉(zhuǎn)子轉(zhuǎn)速升高而降低的關(guān)系 fz=f1×S,當轉(zhuǎn)子轉(zhuǎn)速由 0 上升到額定轉(zhuǎn)速 Ne 時,轉(zhuǎn)子電流頻率則從 50Hz 平滑地降至1~3Hz。起動器阻抗 Zp=rp+jxp,其中鐵損 rp的大小與頻率的平方成正比,隨著 fz 的降低,rp也隨之下降,電抗 Xp=ωLP,同理,Xp 也減少。當起動結(jié)束后,sf1 很小,Zp 則降到很小甚至近似于零,因此電動機在起動時,既能限制起動電流,也能提高功率因數(shù)和增大起動轉(zhuǎn)矩,是一種理想的起動裝置。
PERFORMANCE CHARACTERISTIC
The principle of starter is to use the current frequency of stator fz reduce when stator speed risingfz=f1xS, when the speed of stator rise 0 to rated speed ne, current frequency of stator from 50hz down to 1-3hz. of starter zp=rp+jxp, the size of iron loss rp is proportional to frequency square. with the reduction of fz, rp will go down, reactance xp=ωLp, xp will reduce. when the starting finish, sf1 is very small, zp will go down to nearly zero, so when starting, 
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