Driver of three-level IGBT power module and control method thereof

Abstract

The invention discloses a driver of a three-level IGBT power module. The driver comprises an outer drive unit corresponding to an outer IGBT element of the three-level IGBT power module and an inner drive unit corresponding to an inner IGBT element. The outer drive unit is connected and communicates with the inner drive unit. The outer drive unit and the inner drive unit are each provided with a detection unit correspondingly, and each drive unit is in signal connection with the corresponding IGBT element through the corresponding detection unit. The driver has the advantages of high reliability, high safety and the like. The invention also discloses a control method based on the above driver. The inner drive unit and the outer drive unit are connected and communicate with each other, and control the corresponding IGBT elements respectively to be on and off according to on-off logic, wherein the on-off logic is as follows: the inner IGBT element is switched on earlier than the outer IGBT element and is switched off later than the outer IGBT element. The control method has the advantages of high reliability and the like.

Description

technical field [0001] The invention mainly relates to the technical field of power devices, in particular to a driver and a control method for a three-level IGBT power module. Background technique [0002] With the development of high-speed EMUs, the requirements for the safety and stability of converter modules are getting higher and higher. Compared with the traditional two-level circuit, the three-level circuit can withstand only half of the voltage when the IGBT is turned off, and the three-level setting is also conducive to harmonic suppression. Therefore, the three-level circuit is superior to the two-level circuit in terms of the overall power quality of the traction converter, the application environment of the module, and the extreme and fault conditions. However, the introduction of the three-level circuit increases the complexity of the circuit, and the control and drive are more complicated than the two-level circuit. For the design of a three-level high-power...

AI Technical Summary

Problems solved by technology

However, a system consists of two components, which complicates the system and increases the failure rate accordingly. At the same time, for the three-level circuit, the patent CN201410712694.1 fails to consider the difference in the operating conditions of the inner and outer components and does not consider the parallel connection of the parallel components. driver problem

When addressing the drive problem of component drive or components working in parallel in the three-level main circuit, the drive system proposed in patent CN201410712694.1 will increase the number of drive systems and increase the cost

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