Dc reactors, also known as flat-wave reactors, are mainly used on the DC side of converters, especially in applications on general-purpose frequency converters. Its main function is to reduce harmonic interference, by limiting the AC component superimposed on the DC current in a specified value, in order to maintain the continuity of the rectifier current, reduce the current pulsation value, improve the input power factor, and suppress the harmonic generated by the converter device. The use of DC reactor not only improves the power factor, weakens the instantaneous impact, but also improves the stability of the inverter rectifier link by reducing harmonic interference, thus protecting the inverter and improving the power factor 12 of the frequency conversion system.
For different power frequency converters, such as 7.5kw, 75kw, 55kw, 45kw and 160kw single-phase DC filter reactors, their design and selection should be based on specific application requirements and system requirements. These reactors are optimized by design, such as the structure of cutting the iron core and adding an air gap, to increase the inductance and prevent magnetic flux saturation, so as to reduce the possibility of magnetic flux saturation when the current of the same size is passed. Such a design helps to improve the continuity requirements of the inductance current, while reducing the voltage loss due to harmonic interference
In the application of frequency converter, the choice of DC reactor is crucial to improve the overall performance and efficiency of the system. Different power frequency converters require different specifications of DC reactors to meet their specific needs. For example, for 7.5kw, 75kw, 55kw, 45kw and 160kw frequency converters, choosing the right DC reactor can significantly improve the stability and reliability of the system, while reducing harmonic pollution to the grid. In addition, proper installation and use of DC reactors is also one of the key factors to ensure their effectiveness
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