Power supply circuit for train, train and power supply control method

Abstract

An embodiment of the invention discloses a power supply circuit for a train, the train and a power supply control method. The circuit comprises a storage battery, a super-capacitor, a power supply switching circuit, an inverter and a train motor, wherein the power supply switching circuit is used for triggering the super-capacitor to supply power to the inverter when a train pantograph does not obtain the high-voltage current and enters an emergency traction state, triggering the super-capacitor to stop power supply when the super-capacitor supplies the power for a certain period of time and the train is in a stable operation phase, and triggering the storage battery to supply power to the inverter; the inverter is used for inverting the received supplied current into the alternating current to drive the train motor after receiving the current supplied by the storage batter or the super-capacitor. With the adoption of the power supply circuit for the train, the train and the power supply control method, conditions that train power demands cannot be guaranteed in a starting phase of emergency traction of the train are reduced, and the effect caused by large currents on life shortening of the storage battery is reduced.

Description

technical field [0001] The invention relates to the technical field of transportation, and more specifically, relates to a train power supply circuit, a train and a power supply control method. Background technique [0002] At present, trains (such as urban rail transit vehicles) are generally driven by electricity. The main power supply method of trains is: to obtain high-voltage current (such as high-voltage current of DC1500V) through the pantograph of the train, and the obtained high-voltage current passes through the knife switch and circuit breaker. , transmitted to the inverter, the inverter converts the high-voltage current into alternating current, thereby driving the motor of the train to realize the running of the train. [0003] At present, when a train is in an emergency, it will not be able to obtain high-voltage current through the pantograph. At this time, it is necessary to supply power to the train through an emergency power supply circuit to achieve emerge...

AI Technical Summary

Problems solved by technology

[0004] In view of this, an embodiment of the present invention provides a train power supply circuit, a train and a power supply control method to solve the problem that the emergency traction of the train cannot guarantee the power demand of the train during the start-up phase of the emergency traction of the train, which occurs when the battery pack is used to supply power to the train. Conditions that affect the life of the battery

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