变频器EV1000-4T0022G-C9
时间：2020-10-23 阅读：376
1985年，德国鲁尔大学的DePenbrock教授*提出了直接转矩控制变频技术。该技术在很大程度上解决了上述矢量控制的不足，并以新颖的控制思想、简洁明了的系统结构、优良的动静态性能得到了迅速发展。该技术已成功地应用在电力机车牵引的大功率交流传动上。 直接转矩控制直接在定子坐标系下分析交流电动机的数学模型，控制电动机的磁链和转矩。它不需要将交流电动机等效为直流电动机，因而省去了矢量旋转变换中的许多复杂计算；它不需要模仿直流电动机的控制，也不需要为解耦而简化交流电动机的数学模型1985年，德国鲁尔大学的DePenbrock教授*提出了直接转矩控制变频技术。该技术在很大程度上解决了上述矢量控制的不足，并以新颖的控制思想、简洁明了的系统结构、优良的动静态性能得到了迅速发展。该技术已成功地应用在电力机车牵引的大功率交流传动上。 直接转矩控制直接在定子坐标系下分析交流电动机的数学模型，控制电动机的磁链和转矩。它不需要将交流电动机等效为直流电动机，因而省去了矢量旋转变换中的许多复杂计算；它不需要模仿直流电动机的控制，也不需要为解耦而简化交流电动机的数学模型电机的极数。一般电机极数以不多于(极为宜，否则变频器容量就要适当加大。
2）转矩特性、临界转矩、加速转矩。在同等电机功率情况下，相对于高过载转矩模式，变频器规格可以降额选取。3）电磁兼容性。为减少主电源干扰，使用时可在中间电路或变频器输入电路中增加电抗器，或安装前置隔离变压器。一般当电机与变频器距离超过50m时，应在它们中间串入电抗器、滤波器或采用屏蔽防护电缆
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