Double-unit hot backup direct-current power supply device and railway locomotive
A DC power supply and hot backup technology, applied in electric locomotives, railway vehicles, circuit devices, etc., can solve the problems of the locomotive control system not working normally, the overload of the charger, the damage of the battery, etc., to achieve stable work, improved heat dissipation, Effect of output current reduction
Active Publication Date: 2011-07-27
CRRC DALIAN CO LTD
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Problems solved by technology
Since the battery pack is connected in parallel with the load of the DC power supply unit, when the voltage of the battery pack is too low or feeds power, and constant current charging is required, the charging voltage may be lower than the minimum load operating voltage of the load circuit, resulting in the failure of the locomotive control system. It may even cause the locomotive to break
If the charging voltage is not limited to ensure the normal operation of the locomotive control circuit, the charging current of the battery will be several times the maximum safe current of the battery. If the output power and capacity of the charger are large enough, the battery will definitely be damaged; if the charger If the capacity is not enough, it will definitely cause the charger to be overloaded and burnt.
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[0008] like figure 1 As shown, the circuit of the dual-unit hot backup DC power supply device of the embodiment is mainly composed of the controller CONTRL, input contactors CTT1 and CTT2, DC power supply units PSU1 and PSU2, battery pack BAT, locomotive DC110V control circuit load LD, countercurrent diode D1 and The fault contactor FTT1 is composed. When the DC power supply units PSU1 and PSU2 are both normal, the input contactors CTT1 and CTT2 are closed, and the battery pack BAT is charged from PSU1. The constant voltage current limiting method is used, and the power supply voltage can be 109V, or it can be controlled by the battery temperature compensation. The locomotive control circuit LD is powered by PSU 2. When the output voltage of PSU1>109V, the power supply voltage is the output voltage of PSU1+1V, when the output voltage of PSU1≤109V, the power supply voltage is 110V. Since the reverse voltage drop of D1 is ≥ 0, PSU1 does not supply power to the locomotive contro...
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The invention discloses a double-unit hot backup direct-current power supply device which is composed of a controller CONTRL and two direct-current PSU1 (power supply unit) and a PSU2, wherein, the output negative ends of the PSU1 and the PSU2 are connected with the negative ends of the load circuit leakage detector (LD) and a storage battery set BAT; the output positive end of the PSU2 is connected with the positive end of the load circuit LD; the output positive end of the PSU1 is connected with the positive end of the storage battery set BAT; the positive end of a counter-current diode is connected with the positive end of the storage battery set BAT; the negative end of the counter-current diode is connected with the positive end of the load circuit LD; and a failure contactor FTT1 is connected in parallel with the diode D1. The power supply device provided by the invention has simple structure, and by using the power supply device, the stable working voltage can be provided for the load, and the constant-current charge can be carried out on the storage battery in lower voltage.
Description
technical field [0001] The invention relates to a DC power supply technology for railway locomotives, in particular to a dual-unit hot backup DC power supply device and a railway locomotive. Background technique [0002] At present, on railway locomotives, a DC power supply device is generally used to supply power to the locomotive control circuit and to charge the battery at the same time. The DC power supply device generally adopts dual-unit cold backup, that is, two DC power supply devices are connected in parallel, and are jointly connected to the locomotive control circuit and the battery circuit, and the conversion between the two DC power supply devices is controlled through the input contactor. However, loads such as the microcomputer network control system, converter control system and other electrical equipment of the locomotive control circuit generally require a stable power supply voltage, and it is best to use constant voltage control. The battery charging gen...
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IPC IPC(8): H02J9/04H02J7/00B61C3/00
CPCY02B70/30Y04S20/20
Inventor 蔡志伟高洪光杨守军代兴军李新宫治国
Owner CRRC DALIAN CO LTD