Locomotive-auxiliary generating system capable of achieving self-excited and variable-voltage charge control

Abstract

The invention discloses a locomotive-auxiliary generating system capable of achieving self-excited and variable-voltage charge control. A DC contactor (KM1) is connected in the loop of a storage battery (GB) and an excitation coil (F1 to F2) of an alternator (M); the output of the alternator (M) is connected with the excitation coil (F1 to F2) of the alternator (M) through a miniature circuit breaker (QA2), a resistor (R2), a DC contactor (KM2) and a forward diode (VD2); the output of the excitation coil (F1 to F2) of the alternator (M) is connected with a current control circuit; and the alternator (M) is connected between a fuse (FU2) and a miniature circuit breaker (QA1) through a transformer (TC), a three-phase rectifier cabinet (UR2), a fuse (FU1), a capacitor supporting device (VC1)and a resistor (F1). By using the characteristics of the alternator, other-excited control of the excitation of an auxiliary alternator is changed to the mode of self-excited control, so that when the voltage of the locomotive storage battery is lower than the excitation voltage requirements of the alternator, the output control of the auxiliary alternator can be completed; and the installed capacitor supporting device ensures the stability of the self-excited system of the alternator.

Description

Technical field: [0001] The invention relates to an auxiliary power generation system for a locomotive, in particular to a locomotive that can realize self-excitation and transformer rectification charging control when the voltage of the locomotive battery is lower than the excitation voltage requirement of the generator and can also complete output control and charge control of the battery. Auxiliary power generation system. Background technique: [0002] At present, the battery voltage of the internal combustion electric locomotive and the voltage of the auxiliary electrical equipment are both DC110V. Regardless of the DC auxiliary generator or the AC auxiliary generator, their excitation power is provided by the battery, that is, the excitation of the generator is controlled by other excitation. For example, the specific structure of the auxiliary AC power generation system is that the output of the battery is connected to the excitation coil of the alternator through a ...

AI Technical Summary

Problems solved by technology

This control method is only suitable for DC110V voltage. If the locomotive battery is of other voltage levels (such as DC12V, DC24V, DC36V), because the excitation voltage is higher than the battery voltage, other excitation control methods cannot complete the power generation control of the auxiliary generator.

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