Combined high-capacity wire feeding and braking unit structure based on crimping type IEGT

Abstract

The invention relates to a combined high-capacity wire feeding and braking unit structure based on a crimping type IEGT. A wire feeding unit and a braking unit are combined into a unit structure. Theunit structure comprises a control part, a valve string part, an RC absorption circuit part and a water cooling pipeline; the control part, the valve string part and the RC absorption circuit part aresequentially arranged from front to back; the water cooling pipeline is used for cooling the control part, the valve string part and the RC absorption circuit part; the valve string part integrates power devices of the wire feeding unit and the braking unit; the valve string part is of a crimping type IEGT valve string structure; the water cooling pipeline integrates a water distributor, a resistor radiator and a unit pipeline quick joint; the resistor radiator is used for conducting heat dissipation on a bus voltage-sharing resistor; and the resistor radiator is connected with the unit pipeline quick joint and the water distributor. The wire feeding unit and the braking unit are combined into one integral structure, so that production modularization and on-site maintenance of products are facilitated; and the integral structure is high in stability and easy to maintain.

Description

technical field [0001] The invention belongs to an IEGT unit structure, in particular to a combined large-capacity incoming line braking unit structure based on a crimping type IEGT. Background technique [0002] The incoming line unit is the core component on the inverter busbar. Its main function is to cut off the reverse current from the inverter to prevent the voltage on the other load side from being raised. Its internal structure mainly includes an RC absorbing circuit installed on the main circuit. Cut-off diode; the braking unit is an important part to protect other components in the main circuit of the inverter. It mainly reduces the bus voltage of the inverter by controlling the IGBT switch to realize its protection function. The braking unit mainly includes IGBT (integrated anti-parallel diode) and a diode in series with it. For high-power three-level inverter devices, the incoming line unit has the characteristics of large cut-off diode flow current, high cut-of...

AI Technical Summary

Problems solved by technology

The above factors lead to the large size and low integration of the current incoming line unit and brake unit, which cannot be replaced and repaired quickly and efficiently, and cannot meet the needs of places such as traction locomotives that have small maintenance space and require modular replacement and maintenance. Therefore, the market urgently needs a This is a reliable product with high power density, which combines the functions of incoming line unit and braking unit

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