[DC Smoothing Reactor for Inverters RCDCL Series]

●Product Profile

      A series-connected DC reactor in a DC circuit can keep the AC component superimposed on the DC power supply within a certain limit, reducing current ripple. When the inductance reaches a certain level, it ensures continuous current. Also, when the grid voltage fluctuates, it prevents current interruption due to sudden voltage changes, avoiding faults in the downstream inverter circuit.

      Adding a series DC reactor after the smoothing inductor can help fix the input current waveform distortion caused by capacitor filtering, reduce and prevent damage to the rectifier bridge and capacitor overheating from surge currents, improve the power factor, lower AC ripple on the DC bus, and limit voltage transients in the grid. It also makes the inverter run more smoothly and can help limit short-circuit currents.

      This reactor is fully compatible with inverters from both domestic and international brands like Siemens, ABB, SANKE, Hitachi, Toshiba, Panasonic, Yaskawa, Danfoss, Fuji, Eurotherm, LG, Hyundai, OMRON, Schneider, Lenze, Emerson, and Conwell.

●Product Features

◆High current uses a foil winding structure

      The high-current reactor uses a high-performance foil winding structure. Because of the foil design, it has lower high-frequency skin effect, which gives it strong harmonic resistance. Also, the foil structure has low DC resistance and excellent heat dissipation, so the product generates less heat and its temperature rise is reduced. Plus, it has strong short-circuit resistance, improving its thermal stability. And thanks to its strong heat dissipation, it can handle short-term overloads well.

◆Using high-quality insulation materials

      The inter-turn insulation uses high-performance H-class or above NMN composite insulation material, so the product can maintain its safe and reliable high-temperature performance even under harsh working conditions. It won’t have its insulation performance drop due to rising environmental temperatures or tough on-site conditions, which could otherwise lead to quality issues.

◆Excellent craftsmanship ensures the high quality of the product.

      The core is made of high-quality, low-loss imported cold-rolled oriented silicon steel sheets. The core column is divided into evenly small sections by multiple air gaps, and the gaps are separated with epoxy-laminated glass cloth plates to ensure that the reactor gaps don’t change during operation. This ensures that the product’s reactance remains linear and won’t deviate over long-term continuous use due to loosened gaps.

◆Fully automated CNC production equipment ensures high-quality products.

      The reactor's core is built using an automatic counting stacking machine to stack the laminations, ensuring that each product has the same number of core sheets, and it goes through molding technology to guarantee the integrity and consistency of the core. The coils are wound with a fully automatic CNC foil winding machine, maintaining consistent tension and winding speed during the process, along with an automatic correction program to improve winding accuracy. The lead-out terminals use reliable ultrasonic welding equipment, with no open flame or arc, offering good welding performance and stability, without issues like cold joints or burn-through.

◆Overall vacuum varnishing process of the product

      After the coils and iron core are assembled into one unit, they are coated with H-class impregnating varnish using a vacuum impregnation process. This firmly binds the reactor's coils and iron core together, not only significantly reducing operational noise but also offering a very high heat resistance level, ensuring the reactor can safely run without noise even at high temperatures. The vacuum pressure impregnation process gives the reactor low noise, high efficiency, and low temperature rise, making it comparable to well-known international brands.

●380V DC Smoothing Reactor Selection Table

Download Product Manual (PDF)