IGBT driving circuit of converter for electric locomotive

Abstract

The invention discloses an IGBT driving circuit of a converter for an electric locomotive. The IGBT driving circuit is characterized in that complete isolation of the high-voltage side and the low-voltage side can be achieved through power voltage isolation, control signal isolation and state feedback signal isolation, an IGBT overvoltage-overcurrent protection circuit, a positive voltage protection circuit, a negative voltage protection circuit and a gate pole protection circuit are adopted to implement further circuit protection, and therefore the IGBT converter can safely and reliably run and can well adapt to the complex environment in the electric locomotive. Meanwhile, the IGBT driving circuit is further characterized in that flexible model selection can be carried out on a voltage-stabilizing diode, a bidirectional transient voltage suppression diode and four avalanche diodes, and therefore the requirements of different application scenarios of the electric locomotive for the circuit protection capacity are flexibly met; in addition, flexible model selection can be further carried out on a second adaptation board resistor RA2, a fourth adaptation board resistor RA4 and a first adaptation board capacitor CA1, and therefore the requirements of the different application scenarios of the electric locomotive for the IGBT driving capacity are flexibly met.

Description

technical field [0001] The invention relates to the field of electric locomotives, in particular to an IGBT driving circuit of a converter for electric locomotives. Background technique [0002] At present, the HXD1, HXD2, HXD1B, HXD2B and other models of heavy-duty AC drive electric locomotives produced in China all use converters based on IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) (referred to in this application document as for IGBT converters). The IGBT drive circuit is the key technology for IGBT applications. Its performance directly determines the overall performance of the IGBT converter. Therefore, on the electric locomotive using the IGBT converter, the performance of the IGBT drive circuit is directly related to the safety of the entire electric locomotive. sex and reliability. [0003] On electric locomotives with a voltage of 3300V or higher, due to the high voltage, it is necessary to use high-power IGBTs to build IGBT convert...

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Problems solved by technology

[0004] In the prior art, the widely used IGBT drive circuit is an independent integrated drive chip that can be obtained through commercial means; this integrated drive chip not only has limited drive capability, but also is difficult to flexibly adjust the parameters in the line, so this kind of Independently integrated drive chips cannot meet the needs of electric locomotives for flexible adjustment of the driving capability and line protection capabilities of IGBT drive circuits in different application scenarios; on the other hand, due to the harsh electromagnetic environment on electric locomotives, independent integrated drive chips are very It is prone to failure due to electromagnetic interference, so the independent integrated drive chip in the prior art cannot guarantee the safe and reliable operation of the IGBT converter in the complex environment of the electric locomotive

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