Do you understand the basic structure and working principle of IGBT super audio induction heating power supply circuit?

When it comes to IGBT super audio induction heating power supply, we all know that it refers to a power supply with a frequency of 10-50KHz and an inverter circuit composed of new transistors. In fact, there is still a lot of information about IGBT super audio induction annealing power supply. Today I will first introduce to you the basic structure and working principle of the super audio induction heating power supply circuit.

(1) Basic structure of power circuit. The circuit structure of IGBT super audio induction heating power supply is similar to that of thyristor parallel inverter intermediate frequency power supply. The main difference is that the inverter circuit switching device uses IGBT devices instead of thyristors, but its functions are similar. Each IGBT device is connected in series with a diode. Because the IGBT device cannot withstand reverse pressure, a diode must be connected in series to perform the reverse blocking function.

(2) Working principle of the circuit. Its working principle is similar to that of thyristor parallel inverter intermediate frequency power supply. The main difference is that the switching function of IGBT devices is different from that of thyristors. The switching principle of IGBT is now introduced as follows. IGBT can be regarded as a semiconductor device composed of an input MOSFET and an output PNP transistor, or a PNP transistor driven by a MOSFET. When a forward voltage is applied to the gate of the IGBT device, the P-type inversion under the gate becomes an N-type conductive channel, the MOSFET turns on, and the electron current enters the N-layer, providing a forward base current to the PNP transistor, and the IGBT conducts On the contrary, when a reverse voltage is applied to the gate, the conductive channel disappears, the PNP transistor loses the base drive current, and the IGBT turns off. The gate forward and reverse voltages are provided by specially equipped drive circuits.

Today, the editor briefly introduces to you the basic structure and working principle of the IGBT super audio induction heating power supply circuit. I hope it can help you better understand the super audio induction heating power supply. If you still don’t understand or want to know more For more information, you can consult our technical staff.