Rescuing and returning apparatus for motor train unit

Abstract

The invention provides a rescuing and returning apparatus for a motor train unit. The motor train unit is in a rescuing and returning state. The rescuing and returning apparatus comprises a storage battery, a precharging circuit, a three-phase inverter, an auxiliary inverter and an alternating current asynchronous motor. The precharging circuit comprises a DC-DC converter which is used for providing a first direct current voltage to the storage battery so as to allow the voltage of a busbar to reach a second direct current voltage; the three-phase inverter is used for converting the second direct current voltage into alternating current so as to premagnetize the alternating current asynchronous motor and to allow the alternating current asynchronous motor to enter a fourth quadrant for working; after the alternating current asynchronous motor enters the fourth quadrant for working, alternating current is output according to mechanical energy produced by dragging of the motor train unit and the voltage of the busbar is allowed to reach a third direct current voltage by rectifying the alternating current with the three-phase inverter; and the auxiliary inverter is connected with the three-phase inverter in parallel and used for converting the third direct current voltage obtained from the busbar into alternating current, thereby realizing auxiliary power supply for auxiliary system load.

Description

technical field [0001] The invention relates to the technical field of high-speed EMUs, in particular to a rescue return device for EMUs. Background technique [0002] The auxiliary power supply of high-speed EMUs plays a key role in the normal operation of vehicles and the safe and normal ride of passengers on EMUs. However, when the EMU stops due to a breakdown, it is often necessary for other vehicles to drag the faulty vehicle to the locomotive depot or the EMU station. At this time, the dragged EMU is in a rescue return state. [0003] Since the EMU has no external catenary power supply when it is in the rescue return state, the auxiliary power supply system of the EMU often cannot operate normally due to lack of power supply. The power failure of the auxiliary system will bring many problems, especially when there are passengers on the driven EMU, the air conditioning system of the EMU, such as the air conditioning system, cannot operate because the auxiliary system h...

AI Technical Summary

Problems solved by technology

However, when the EMU stops due to a breakdown, other vehicles are often required to drag the faulty vehicle to the locomotive depot or the EMU station. At this time, the towed EMU is in the state of rescue return

[0003] Since the EMU has no external catenary power supply when it is in the rescue return state, the auxiliary power supply system of the EMU often cannot operate normally due to the lack of power supply

Auxiliary systems without power will cause many problems, especially when there are passengers on the driven EMU, the EMU air conditioning system cannot operate because of the auxiliary system’s power failure, resulting in high temperature inside the EMU

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