描述
當(dāng)電機(jī)工作在電動(dòng)狀態(tài)的時(shí)候,整流控制單元的DSP產(chǎn)生6路高頻的PWM脈沖控制整流側(cè)的6個(gè)IGBT的開(kāi)通和關(guān)斷。IGBT的開(kāi)通和關(guān)斷與輸入電抗器共同作用產(chǎn)生了與輸入電壓相位一致的正弦電流波形,這樣就消除了二極管整流橋產(chǎn)生的6K±1諧波。功率因數(shù)高達(dá)99%。消除了對(duì)電網(wǎng)的諧波污染。此時(shí)能量從電網(wǎng)經(jīng)由整流回路和逆變回路流向電機(jī),變頻器工作在第一、第三象限。當(dāng)電動(dòng)機(jī)工作在發(fā)電狀態(tài)的時(shí)候,電機(jī)產(chǎn)生的能量通過(guò)逆變側(cè)的二極管回饋到直流母線,當(dāng)直流母線電壓超過(guò)一定的值,整流側(cè)能量回饋控制部分啟動(dòng),將直流逆變成交流,通過(guò)控制逆變電壓相位和幅值將能量回饋到電網(wǎng),達(dá)到節(jié)能的效果。此時(shí)能量由電機(jī)通過(guò)逆變側(cè)、整流側(cè)流向電網(wǎng)。變頻器工作在二、四象限。輸入電抗器的主要功能是電流濾波。
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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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③General electric(通用電氣)系列產(chǎn)品》
④Westinghouse(美國(guó)西屋)系列產(chǎn)品》
⑤SIEMENS(西門(mén)子系列產(chǎn)品)》
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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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