描述

1、針對(duì)不同電壓等級(jí)、不同容量的變頻器（尤其是已經(jīng)內(nèi)置制動(dòng)單元的），制動(dòng)電阻的總阻值不應(yīng)小于制動(dòng)單元的允許值。

2、根據(jù)常用的變頻器容量范圍，選購(gòu)一兩種阻值，功率的制動(dòng)電組。

3、根據(jù)系統(tǒng)的轉(zhuǎn)動(dòng)慣量、機(jī)械系統(tǒng)的承受能力和為達(dá)到制動(dòng)停止的斜率要求考慮能耗功率（也是制動(dòng)電組瞬間的最大功率）。

3.1系統(tǒng)的轉(zhuǎn)動(dòng)慣量：如果不是被拖動(dòng)，含有傳動(dòng)比i的各級(jí)轉(zhuǎn)動(dòng)慣量可以使用SolidWorks大致做出來(lái)（因?yàn)闄C(jī)械系統(tǒng)也是自己設(shè)計(jì)，設(shè)計(jì)完后已經(jīng)知道電機(jī)軸上的總轉(zhuǎn)動(dòng)慣量）。則電機(jī)軸總慣量=電機(jī)轉(zhuǎn)子慣量（電機(jī)手冊(cè)上有）+(（負(fù)載處慣量/i2）+傳動(dòng)慣量）/i1。

4、根據(jù)制動(dòng)功率=K*能耗功率?？梢酝ㄟ^串、并聯(lián)的方法同時(shí)滿足阻值和耗散功率的要求。例如：380V，22kW變頻器，制動(dòng)電組要求27Ω那么可用并聯(lián)兩個(gè)56Ω=28歐達(dá)到瞬時(shí)26KW的要求。

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主營(yíng)：世界知名品牌的PLC、DCS系統(tǒng)備件模塊

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結(jié)構(gòu)的zui現(xiàn)代化的容錯(cuò)控制器。

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