High voltage igbt drive and protection circuit

Abstract

The invention discloses a high-voltage IGBT drive and protection circuit, including: a signal processing circuit, an isolation transformer transmission circuit, an isolation power supply circuit, an undervoltage protection circuit, a gate clamp circuit, a short circuit protection circuit, an IGBT dynamic fault detection circuit, and an insulation barrier double Pole transistor, power supply; the advantage of the present invention is that it can work in a high-voltage operating environment and can output relatively large power. , has strong anti-interference ability, and the input bus voltage of 1800V can realize the drive isolation ability above 4000V, which greatly ensures the safety of the system; at the same time, the working status information transmitted to the present invention through the feedback signal can be remotely controlled by the central control unit The real-time monitoring and control greatly improves the reliability of the system, and the invention can be widely used in the field of industrial control requiring power conversion.

Description

Technical field [0001] The invention relates to a high-voltage IGBT drive and protection circuit, and belongs to the technical field of power electronics. Background technique [0002] Insulated Gate Bipolar Transistor IGBT (Insulated Gate Bipolar Transistor) is a composite fully controlled voltage-driven power semiconductor device composed of BJT (Bipolar Transistor) and MOS (Insulated Gate Field Effect Transistor), which also has MOSFET The advantages of high input impedance and low on-voltage drop of GTR. The saturation voltage of GTR is reduced, the current-carrying density is high, but the driving current is relatively large, the MOSFET driving power is small, the switching speed is fast, but the conduction voltage drop is large, and the current-carrying density is small. IGBT combines the advantages of the above two devices, with low driving power and reduced saturation voltage. It is very suitable to be used in conversion systems with a DC voltage of 600V and above, such...

AI Technical Summary

Problems solved by technology

[0005] However, when the traditional auxiliary converter works under the condition of high voltage and high power, it inevitably has defects such as slow response speed of the circuit, poor anti-interference ability, and low work efficiency, which greatly affects the safety and reliability of the system.

Images