Grid driving protection circuit, grid driving protection system and vehicle-mounted inverter system

Abstract

The invention relates to a gate drive protection circuit and system and a vehicle-mounted inverter system. The gate drive protection circuit comprises a gate drive module, a fault signal output module, an under-voltage protection module, a short-circuit protection module, a misconduction protection module and a constant-current output module. The gate driving module comprises a driving chip; the fault signal output module is electrically connected with the driving chip and the micro-control unit and is used for outputting a fault signal; one end of the under-voltage protection module is electrically connected with the driving chip, the other end of the under-voltage protection module is electrically connected with the fault signal output module, and the under-voltage protection module is used for carrying out under-voltage protection on the input voltage of the driving chip; the short-circuit protection module is electrically connected with the driving chip and is used for performing short-circuit protection on the driving chip; the mis-conduction protection module is electrically connected with the driving chip and is used for preventing mis-conduction of the switching transistor; the constant current output module is electrically connected with the driving chip and is used for outputting stable current; therefore, the circuit system is higher in stability and more optimized in performance, and the circuit is not easy to damage and scrap.

Description

technical field [0001] The present application relates to the technical field of circuit protection, in particular to a gate drive protection circuit, system and vehicle inverter system. Background technique [0002] Due to the development of science and technology, electronic devices are developing towards high density, high power, and miniaturization. While the large-scale use of electronic devices brings convenience to our lives, the higher and higher power makes the heat dissipation of electronic devices more and more serious. serious. Therefore, heat dissipation is a very critical technology, and the quality of heat dissipation directly affects the performance and life of the product. The earliest IGBT (Insulated Gate Bipolar Transistor-Insulated Gate Bipolar Transistor) double-sided water cooling technology (DSC, Dual-sided Cooling Technology) was developed based on the application of new energy vehicles, mainly to solve the power density problem of on-board inverters...

AI Technical Summary

Problems solved by technology

[0003] As the key device of the double-sided water-cooling technology, the gate driver acts as a power amplifier, which receives low power input from the controller and generates The high current drive input of the gate of the transistor (MOSFET) device; while the protection performance of the existing circuit is not enough, the gate driver cannot cope well with faults such as circuit short circuit and undervoltage during operation, the system stability and reliability are not strong, and the circuit Easily damaged leading to scrap

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