HXD3B Electric Locomotive Main Circuit System Applied Research

Type HXD3B electric locomotive is currently the world’s6largest single shaft locomotive power, high level of technology, advanced performance of AC drive electric locomotive.The locomotive is now used for trunk traction electric freight locomotive, adopts AC-DC-AC transmission mode, the maximum speed for120km/h. Using high-power water-cooled IGBT water-cooling converter, single axis control technology, high power asynchronous traction motor, frame type bearing body, equipment arrangement uses a central corridor equipment layout, circuit and main technical characteristics of the system are as follows:1. Locomotive adopts vehicle high voltage cabinet design, the pantograph support insulator, lightning arrester and other high-voltage electrical appliances all arranged in locomotive design, will greatly improve the reliability of the locomotive.2.1632kW large torque asynchronous traction motor, starting with (Continued) large traction force, constant power speed range is wide, adhesive properties, and high power factor.3. General design by highly integrated, modularized design idea, electric cabinet and various auxiliary unit skew symmetry is arranged in the middle corridor on both sides.4. With3group by high-power water-cooled IGBT components of the traction converter, using axis control technology. Each group of traction converter integrated by a DC intermediate circuit power supply of the auxiliary inverter.5. Redundant distributed microcomputer network control system, realizes the logic control, self diagnosis function, and the realization of the locomotive network reconnection function.6. The suspended installation of the integration of multi winding of traction transformer, the internal integration of three resonant reactor, cooling mode is forced directed oil circulation air cooling.This paper summarizes the type locomotive main circuit system of pantograph, main transformer, high voltage transformer using problems, in-depth analysis, improvement and use, to solve the problems, the main circuit system can be highly efficient and stable normal use, solutions and technical improvement of a certain reference value.