Compared with the parallel inverter, the thyristor series inverter has more advantages: 1. In the series inverter circuit, the current IL flowing through the inductor is close to the active current, so Il is very small, and the electrical loss caused by Il in the inductor resistance is very small. According to theoretical calculation and experimental testing, the electrical efficiency of the induction furnace can reach as high as 97%, and the series inverter induction furnace can save more than 10% of electricity.
2. The series inverter circuit can maintain full power throughout the entire process from cold charging to pouring, greatly improving operational efficiency. Melting rate **.
3. The series inverter circuit requires a constant voltage source input, and uses a large capacitance Cd for filtering. First, it keeps the three-phase power frequency input current as a sine wave, and the medium frequency current is completely bypassed by Cd at the DC end. The power regulation of the series inverter is implemented in the inverter bridge, and the controllable rectifier angle a is at zero degrees, without rectifier commutation notches, causing no interference to the power grid.
4. In the three-phase rectifier bridge, the angle a is at zero degrees during operation, that is, the DC voltage is at its ** value. The large-capacity Cd is directly connected to the DC end, automatically maintaining the power factor of the power grid above 0.97.
5. The startup success rate is ****, because the current flowing through the inverter thyristor is a sine wave, so there is no problem of thyristor turn-on and turn-off. That is, the inverter will not fail in commutation, and there is no startup problem. For more information, please consult the Blue Hui Technical Department
