All-function IGBT (insulated gate bipolar translator) digital driver

Abstract

The invention relates to the technical field of digital drivers, and particularly discloses an all-function IGBT (insulated gate bipolar translator) digital driver. The all-function IGBT digital driver comprises a synchronous controller, a plurality of drivers are connected to the synchronous controller, each driver is connected with an IGBT, and a PCB (printed circuit board) current sensor and a voltage detecting circuit are integrated in each driver. The all-function IGBT digital driver has the advantages that communication with a computer is achieved, a user can download personal IGBT working parameters into the drivers via a software interface, new IGBT operating parameters can be executed after the drivers are electrified again, the user can select working modes, including a single-tube mode, a parallel connection mode and a serial connection mode, of the drivers in software, and the drivers can work according to user setting; in parallel-connection or serial-connection application, the drivers are capable of automatically adjusting the parallelly connected IGBTs to enable the same to be in dynamic current-sharing or the serially connected IGBTs to enable the same to be in dynamic voltage-sharing, and the drivers are set into the single-tube driving mode by default.

Description

technical field [0001] The patent of the present invention relates to the technical field of digital drivers, in particular to a full-featured IGBT digital driver. Background technique [0002] IGBT (Insulated Gate Bipolar Transistor, Insulated Gate Bipolar Transistor) has the performance characteristics of high frequency, high voltage, high current, especially easy to turn on and off, and is internationally recognized as the most important part of the third revolution of power electronics technology. The representative product has been developed to the sixth generation so far, and the commercialization has been developed to the fifth generation. At present, IGBT has been widely used in various industries of the national economy. [0003] With the wide application of high-power IGBT modules, the IGBT driver, which is the key link between the control system and the power system, has been greatly developed, but the protection function is still being improved (currently the pr...

AI Technical Summary

Problems solved by technology

[0008] (1) The protection function of the driver is not comprehensive enough, and the second type of short circuit protection and overcurrent protection are not comprehensive;

[0009] (2) The user does not know the parameters of the drive protection function, and does not understand the parameter adjustment and the operating status of the drive;

[0010] (3) The manufacturer's adaptation test cycle is long, which delays the product development progress;

[0011] (4) In the series-parallel application of IGBTs, the series connection requires the synchronization of the collector-emitter voltage Vce of multiple IGBT modules, and the parallel application requires the synchronization of the current IC of multiple IGBT modules. The series-parallel function of the existing driver is to directly control the gate of the IGBT module Synchronization, instead of directly controlling the synchronization of Vce and Ic, which belongs to equivalent control. Due to the slight difference between IGBT modules, after gate synchronization, Vce and Ic may be out of sync

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