Traction converter of straddle type monorail train

Abstract

The invention relates to a traction converter of a straddle type monorail train. The traction converter comprises a main circuit module and a control circuit, wherein the main circuit module is provided with a pre-charge circuit, an overvoltage protection circuit, an input filtering circuit and a traction inverter circuit module; the control circuit comprises a traction controller TCU (tape control unit), a current sensor and a voltage sensor; the traction controller TCU is respectively connected with the current sensor and the voltage sensor and used for collecting voltage, current and rotary speed signal to control the output of the traction inverter circuit and finish the voltage protection. Modularized design is adopted in the main circuit of the traction converter of the straddle type monorail train, so that the volume is small, and the weight is light, wherein an IGBT (insulated gate bipolar translator) power semiconductor technology is selected in the traction inverter circuit module, the high switching frequency control is allowed, and a composite laminated bus bar with stray inductance is adopted, so that the voltage overshoot produced by the stray inductance of the circuit under the higher di / dt action can be reduced while IGBT is cut off, the probability for damaging the IGBT is reduced, and the reliability of the system is high.

Description

technical field [0001] The invention relates to a traction converter device, in particular to a traction converter for a straddle-type monorail train. Background technique [0002] The traction converter controls and regulates the traction motor, thereby controlling the operation of the train, and is one of the most critical equipment on the train. At present, urban rail transit has become the mainstream of my country's transportation development. Straddle-type monorail trains have many advantages such as small footprint, strong climbing ability, small passing curve radius, low construction cost, low noise, etc., especially suitable for mountainous areas, etc. In a city with a complex terrain structure, Chongqing Line 2 has built a straddle-type monorail train and has been operating successfully for many years. However, the traction system of the original vehicle adopts foreign technology. Once the traction system fails, maintenance is difficult, and it is necessary to contac...

AI Technical Summary

Problems solved by technology

At present, urban rail transit has become the mainstream of my country's transportation development. Straddle-type monorail trains have many advantages such as small footprint, strong climbing ability, small passing curve radius, low construction cost, low noise, etc., especially suitable for mountainous areas, etc. In a city with a complex terrain structure, Chongqing Line 2 has built a straddle-type monorail train and has been operating successfully for many years. However, the traction system of the original vehicle adopts foreign technology. Once the traction system fails, maintenance is difficult, and it is necessary to contact the original foreign factory for maintenance, which is time-consuming. It is laborious, if it is damaged and cannot be used, it needs to be purchased again, the cost of use is high, and it cannot be replaced in time, which is a waste of time

However, the existing domestic traction converters cannot replace foreign products due to their incompatibility in performance parameters, interfaces, stability, etc., and high failure rates.

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