Chat about the characteristics and applications of IGBT super audio induction heating power supply

Now, IGBT super audio frequency induction heating power supply has been developed in China for decades, and its application is quite common. Despite this, some people still don't know much about it, and even its characteristics and applications are poorly understood. Today, the editor will tell you about the characteristics and applications of IGBT super audio induction heating power supply.

Compared with thyristor medium frequency induction heating power supply, IGBT super audio frequency induction heating power supply has the following characteristics.

(1) The electrical efficiency of the power supply is relatively high. The inverter output voltage of IGBT super audio induction heating power supply is high, the current is small, and the circuit loss is small. It is an energy-saving power supply. The power factor is about 10% higher than that of thyristor intermediate frequency power supply, and can usually reach more than 90%.

(2) The output power is stable. The IGBT inverter frequency tracks load changes. As the temperature of the heated metal increases, when the resistivity and magnetic permeability change, the power supply operating frequency also changes randomly, reaching the full resonant frequency and automatically tracking. By adjusting the power supply frequency, the power supply output power is automatically adjusted. , that is, frequency conversion power adjustment. This achieves stable output power and significantly improves heating efficiency.

(3) The harmonic interference to the power grid is small. The high-order harmonics generated by the IGBT super audio inverter power supply are small, and the harmonic interference to the power grid is very weak.

IGBT super audio induction heating power supply and thyristor intermediate frequency power supply have become the main power supply for induction heating. Among the IGBT super audio power supplies, the parallel inverter power supply is suitable for induction heating and rapid heat treatment of steel. It is mainly used for induction heating heat treatment of small-scale rods, wires and wires. Series inverter power supplies are rarely used.