Diesel locomotive rectification chopping phase power module

Abstract

The invention discloses a diesel locomotive rectification chopping phase power module. The module comprises a main circuit of a diesel shunting locomotive traction electric transmission system and a main circuit of the rectification chopping phase power module. The main circuit of the traction electric transmission system comprises a main power generator, the rectification chopping phase power module and a three-phase inverter module, and the three-phase inverter module and the rectification chopping phase power module share one direct-current bus. The rectification chopping phase power modulefurther comprises a traction motor. The rectification chopping phase power module comprises a set of single-phase rectification bridge arms and a chopping branch. The AC-DC conversion function of thediesel shunting locomotive traction electric transmission system is achieved through three rectification chopping phase power modules identical in structure. The rectification chopping phase power modules are in lap joint with the direct-current bus of the main circuit, the single-phase rectification bridge arms are combined to achieve the three-phase rectification function, and three chopping branches are connected in parallel to achieve the direct-current chopping function. The assembly space of a converter space is effectively used, the wiring structure is simplified, temperature increaseof the module is reduced, the power module works more stably and more safely, and the adaptability is better.

Description

technical field [0001] The invention belongs to the technical field of internal combustion locomotives, and relates to a power module, in particular to a rectifying and chopper phase power module of an internal combustion locomotive applied to a traction electric drive system of an internal combustion shunting locomotive. Background technique [0002] When the diesel locomotive AC drive system is working, the diesel engine drives the main generator, and the TCMS controls the excitation current of the main generator so that it outputs a three-phase AC voltage according to the diesel engine speed, and then supplies the traction converter, and the three-phase AC output from the traction converter The voltage is supplied to the traction motors on the same bogie, and the traction control is completed in the form of "traction main generator - traction converter - three-phase AC motor load". The traction converter usually adopts the circuit structure of "three-phase rectifier modul...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the power module in the traction system has a single function and complex circuit structure: since the traction converter system needs to complete not only the rectification function, but also the inverter and chopping functions, there will be two or three kinds of functions in the design of the power module. There are two or three types of composite busbars for circuit connection

This not only brings more design cost and material cost to the power module, but also causes relatively complex circuit structure connection

In addition, the three-phase rectifier module is an integral structure, six diodes dissipate heat at the same time, the temperature rise of the module is high, and there is a risk of burning

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