Q1: What are the functions of a DC reactor?
DC reactors (direct current reactors) are mainly used in DC circuits to smooth current, reduce ripple, suppress harmonics, and limit inrush current. In equipment such as frequency converters and rectifiers, they reduce current fluctuations on the DC bus, improve power quality, and reduce the impact on capacitors and power devices, thereby improving system stability and extending equipment lifespan.
Q2: What is the working principle of a DC reactor?
A DC reactor is essentially an inductor that utilizes the characteristic of inductance to "oppose changes in current" (i.e., generate a back electromotive force to changes in current). When the current changes rapidly or ripple exists, the reactor generates an induced voltage to suppress this change, making the current tend to stabilize; at the same time, it has a large impedance to high-frequency harmonics, thus acting as a filter. Therefore, DC link reactor can achieve the effects of current limiting, filtering, and stabilizing current in DC circuits.
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