Driver and control method for three-level igbt power module

Abstract

The invention discloses a driver for a three-level IGBT power module, which includes an outer drive unit corresponding to the outer IGBT element of the three-level IGBT power module, an inner drive unit corresponding to the inner IGBT element, and the connection between the outer drive unit and the inner drive unit. The external drive unit and the internal drive unit are respectively equipped with detection units, and are connected to the corresponding IGBT component signals through the corresponding detection units. The driver of the invention has the advantages of high reliability and safety. The present invention also discloses a control method based on the above-mentioned driver. The inner drive unit and the outer drive unit communicate with each other, and respectively control the corresponding IGBT elements to be turned on and off according to the on-off logic. The on-off logic is: The inner IGBT element is turned on before the outer IGBT element; the inner IGBT element is turned off after the outer IGBT element. The control method of the invention has the advantages of high reliability and the like.

Description

Technical field [0001] The present invention mainly relates to the technical field of power devices, and particularly refers to a driver and control method for a three-level IGBT power module. Background technique [0002] With the development of high-speed EMUs, the safety and stability requirements of converter modules are getting higher and higher. Compared with the traditional two-level circuit, the three-level circuit has only half the withstand voltage when the IGBT is turned off, and the three-level setting is also conducive to harmonic suppression. Therefore, the three-level circuit is better than the two-level circuit in the overall power quality of the traction converter, the module application environment and the performance of 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 I...

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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