描述
当电机工作在电动状态的时候,整流控制单元的DSP产生6路高频的PWM脉冲控制整流侧的6个IGBT的开通和关断。IGBT的开通和关断与输入电抗器共同作用产生了与输入电压相位一致的正弦电流波形,这样就消除了二极管整流桥产生的6K±1谐波。功率因数高达99%。消除了对电网的谐波污染。此时能量从电网经由整流回路和逆变回路流向电机,变频器工作在第一、第三象限。当电动机工作在发电状态的时候,电机产生的能量通过逆变侧的二极管回馈到直流母线,当直流母线电压超过一定的值,整流侧能量回馈控制部分启动,将直流逆变成交流,通过控制逆变电压相位和幅值将能量回馈到电网,达到节能的效果。此时能量由电机通过逆变侧、整流侧流向电网。变频器工作在二、四象限。输入电抗器的主要功能是电流滤波。
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主营:世界知名品牌的PLC、DCS系统备件模块
①Allen-Bradley(美国AB)系列产品》
②Schneider(施耐德电气)系列产品》
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④Westinghouse(美国西屋)系列产品》
⑤SIEMENS(西门子系列产品)》
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据通信及处理等。Invensys Triconex:冗余容错控制系统、基于三重模件冗余(TMR)
结构的zui现代化的容错控制器。
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