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仲鑫达自动化备件解决方案

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各种大型进口DCS系统备品，备件。

专注于停产的控制系统零部件地位！

我们有我们自己的内部库存和大量的供应商为分销商为您带来的解决方案满足您的需求!

仲鑫达自动化有一个坚定的承诺为您提供高质量，高价值，和服务和各地的客户！

我们有大量库存的，停产的控制系统部件。我们还分发了许多新的硬件和软件产品，广泛的测试和出售的零部件都配备了1年的保修期。

利用电力半导体器件的通断作用将工频电源变换为另一频率的电能控制装置。可分为交—交变频器，交—直—交变频器。交—交变频器可直接把交流电变成频率和电压都可变的交流电；目前使用的变频器主要采用交—直—交方式（VVVF变频或矢量控制变频），先把工频交流电源通过整流器转换成直流电源，然后再把直流电源转换成频率、电压均可控制的交流电源以供给电动机。在当今工业社会，环保和节能显得越来越重要，而变频器在工业节能中发挥着越来越大和不可忽视作用。

关键词：变频器、运动控制、整流器、逆变器

前言

变频器是系统中的功率变换器。目前的运动控制系统已包含多种学科的技术领域，总的发展趋势是驱动的交流化、功率变换器的高频化、控制的数字化、智能化和网络化。

随着新型电力电子器件和微处理器的应用以及控制技术的发展，变频器的性能价格比越来越高，体积越来越小，而且厂家仍在不断地提高可靠性，为实现变频器的进一步小型轻量化、化和多功能化以及无公害化而做着新的努力。辨别变频器性能的优劣，一要看其输出交流电压的谐波对电机的影响；二要看对电网的谐波污染和输入功率因数；后还要看本身的能量损耗。

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