Traction converter device based on high-compatibility power unit

Abstract

The invention relates to a traction converter device, in particular to a traction converter device based on a high-compatibility power unit, and solves the problems of single function, incompatibility, long development period and large economic cost of spare parts of the existing power module unit. The scheme is as follows: the device comprises two power units respectively formed by connecting four paths of half-bridge circuits in parallel, an input end peripheral circuit, a middle peripheral circuit, a chopping resistor and an output end peripheral circuit, wherein the power unit at the left side is assembled at the input end and forms a four-quadrant rectifier unit through parallel application of two paths of half-bridges; the power unit at the right side is assembled at the output end and three paths of half-bridges form an inverter unit and the remaining path of half-bridge and the chopping resistor form a chopping unit. The device has the advantages that through the standardized power unit module, the research and development number of the power units can be reduced and the design cycle is greatly reduced; the types of components in the converter device are reduced; and the simplification of the power units and electric interfaces is realized.

Description

technical field [0001] The invention relates to a traction converter, in particular to a traction converter based on a highly compatible power unit. Background technique [0002] 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 has both high input impedance and GTR of MOSFET The advantages of low conduction voltage drop are two aspects. The saturation voltage of GTR is low, the carrying current density is large, but the driving current is large; the driving power of MOSFET 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, the driving power is small and the saturation voltage is low, and it is very suitable for the conversion system with a DC voltage of 600V and above, such as AC motors, freq...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problems of existing power module units such as single function, incompatibility with each other, long development period, and large economic cost of spare parts, and provides a traction converter device based on highly compatible power units

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