CN220066974U - Auxiliary power supply of rail emergency power supply - Google Patents

Abstract

The utility model discloses an auxiliary power supply of a rail emergency power supply, which comprises: the control system comprises a main circuit, an auxiliary power circuit connected with the input end of the main circuit and a control system module respectively connected with the input end of the main circuit and the output end of the auxiliary power circuit. The utility model can reduce the loss of the electric quantity of the storage battery caused by the emergency auxiliary reverse, reduce the damage to devices caused by electrifying, prolong the service life of the whole emergency auxiliary reverse and improve the reliability of the emergency auxiliary reverse product.

Description

Auxiliary power supply of rail emergency power supply

Technical Field

The utility model relates to the technical field of rail transit power supplies, in particular to an auxiliary power supply of a rail emergency power supply.

Background

In the field of rail transit power supply, in order to ensure reliable reliability of vehicles, emergency auxiliary inverters of emergency power supplies are designed for power supply systems on high-speed rails and subways, and in general, indicator lamps, fans, charging sockets and the like on the high-speed rails and subways are powered by the auxiliary inverters on the vehicles, and when a power supply system on the vehicle breaks down, the emergency auxiliary inverters are required to invert direct-current voltage of storage batteries on the vehicle into alternating current to power the indicator lamps, fans, sockets and the like on the vehicle. The direct current input of the emergency auxiliary inverter is connected with a storage battery on the vehicle, and when a fault signal is detected, inversion output is started. The disadvantage of this solution is: the emergency auxiliary reverse control system module can consume the electricity of the storage battery, and the power feeding of the storage battery is easy to cause.

Therefore, how to solve the feeding of the storage battery in the inversion process and improve the reliability of the emergency auxiliary inverted product becomes an urgent problem to be solved.

Disclosure of Invention

The utility model aims to provide an auxiliary power supply of a rail emergency power supply, which aims to solve the problems in the background art.

The technical aim is achieved by the following technical scheme: an auxiliary power supply for a rail emergency power supply is provided, comprising: a precharge circuit, a DC/AC inverter circuit connected to the precharge circuit, an auxiliary power supply circuit connected to the precharge circuit, and a control system module connected to the DC/AC inverter circuit and the auxiliary power supply circuit, respectively;

the auxiliary power supply circuit includes: the external contactor KM3, a current limiting resistor R2, a MOS tube Q2, an input capacitor C3, a transformer T2 and a diode D2;

the control system module is connected to external contactor KM3 one end, external contactor KM3 other end is connected outside direct current input positive terminal and current-limiting resistor R2's one end respectively, current-limiting resistor R2's the other end is connected respectively input capacitor C2's one end with transformer T2 primary coil's one end, transformer T2 primary coil's the other end is connected MOS pipe Q2's drain electrode, MOS pipe Q2's source is connected respectively input capacitor C2's other one end and outside direct current input negative terminal, transformer T2 secondary coil's one end is connected diode D2's negative pole, diode D2's positive pole is connected input capacitor C3's one end, input capacitor C3's the other end is connected transformer T2 secondary coil's the other end.

Preferably, the auxiliary power supply circuit is used for a starting signal circuit of the emergency power supply and converting direct-current voltage provided by an external fault signal into control power to supply power to the control system module.

Preferably, the control system module is used for collecting fault signals input from outside and controlling the DC/AC inverter circuit to work.

Preferably, the precharge circuit includes: a precharge contactor KM1, a main electric contactor KM2, and a precharge resistor R1;

the one end of precharge contactor KM1 is connected with the external direct current input positive terminal, the other end of precharge contactor KM1 is connected with one end of precharge resistor R1, the other end of precharge resistor R1 is connected with one end of main electric contactor KM2 and the input end of DC/AC inverter circuit respectively, the other end of main electric contactor KM2 is connected with the external direct current input positive terminal.

Preferably, the output end of the DC/AC inverter circuit is used as the output of an emergency power supply.

The utility model has the following advantages:

1) The utility model can reduce the loss of the electric quantity of the storage battery caused by emergency auxiliary reverse.

2) The utility model can reduce the damage to the device caused by the power on, prolong the service life of the whole emergency auxiliary reverse product and improve the reliability of the emergency auxiliary reverse product.

Drawings

FIG. 1 is a system block diagram of the present utility model;

FIG. 2 is a circuit diagram of a precharge circuit of the present utility model;

fig. 3 is a circuit diagram of an auxiliary power circuit of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 and 3, the present utility model provides an auxiliary power supply for a rail emergency power supply, comprising: a precharge circuit, a DC/AC inverter circuit connected to the precharge circuit, an auxiliary power supply circuit connected to the precharge circuit, and a control system module connected to the DC/AC inverter circuit and the auxiliary power supply circuit, respectively;

the auxiliary power supply circuit includes: the external contactor KM3, a current limiting resistor R2, a MOS tube Q2, an input capacitor C3, a transformer T2 and a diode D2;

the control system module is connected to external contactor KM3 one end, external contactor KM3 other end is connected outside direct current input positive terminal and current-limiting resistor R2's one end respectively, current-limiting resistor R2's the other end is connected respectively input capacitor C2's one end with transformer T2 primary coil's one end, transformer T2 primary coil's the other end is connected MOS pipe Q2's drain electrode, MOS pipe Q2's source is connected respectively input capacitor C2's other one end and outside direct current input negative terminal, transformer T2 secondary coil's one end is connected diode D2's negative pole, diode D2's positive pole is connected input capacitor C3's one end, input capacitor C3's the other end is connected transformer T2 secondary coil's the other end.

Under normal conditions, the fault signal of the vehicle is not electrified, the fault signal of the vehicle is utilized to supply power to the control system module of the emergency auxiliary reverse, and the main circuit and the control system module of the emergency auxiliary reverse are not powered, so that the emergency auxiliary reverse and the storage battery are disconnected; when the vehicle power supply fails, the external fault signal is not only used as a starting signal of the emergency power supply, but also can assist in supplying power to the emergency power supply, and the external fault signal is used for supplying power to the auxiliary power supply of the emergency power supply through the power of the storage battery, and the emergency power supply starts to work after the auxiliary power supply is started, so that the loss of the emergency auxiliary power supply to the electric quantity of the storage battery can be reduced.

As a preferred implementation manner of this embodiment, the auxiliary power circuit is used for changing the direct-current voltage provided by the external fault signal into control power to supply power to the control system module by the starting signal circuit of the emergency power supply.

As a preferred implementation manner of this embodiment, the control system module is configured to collect an externally input fault signal and control the DC/AC inverter circuit to operate.

As shown in fig. 2, as a preferred implementation manner of this embodiment, the precharge circuit includes: a precharge contactor KM1, a main electric contactor KM2, and a precharge resistor R1;

the one end of precharge contactor KM1 is connected with the external direct current input positive terminal, the other end of precharge contactor KM1 is connected with one end of precharge resistor R1, the other end of precharge resistor R1 is connected with one end of main electric contactor KM2 and the input end of DC/AC inverter circuit respectively, the other end of main electric contactor KM2 is connected with the external direct current input positive terminal. The precharge circuit is provided to limit the effect of the power-on instant on the capacitor charging current to protect the rectifier components from damage due to the capacitor instant short-circuit current.

As a preferred implementation manner of this embodiment, the output end of the DC/AC inverter circuit is used as the output of the emergency power supply. The direct-current electric energy can be converted into alternating-current electric energy for the alternating-current load on the vehicle to use.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. An auxiliary power supply for a rail emergency power supply, comprising: a precharge circuit, a DC/AC inverter circuit connected to the precharge circuit, an auxiliary power supply circuit connected to the precharge circuit, and a control system module connected to the DC/AC inverter circuit and the auxiliary power supply circuit, respectively;

the auxiliary power supply circuit includes: the external contactor KM3, a current limiting resistor R2, a MOS tube Q2, an input capacitor C3, a transformer T2 and a diode D2;

the control system module is connected to external contactor KM3 one end, external contactor KM3 other end is connected outside direct current input positive terminal and current-limiting resistor R2's one end respectively, current-limiting resistor R2's the other end is connected respectively input capacitor C2's one end with transformer T2 primary coil's one end, transformer T2 primary coil's the other end is connected MOS pipe Q2's drain electrode, MOS pipe Q2's source is connected respectively input capacitor C2's other one end and outside direct current input negative terminal, transformer T2 secondary coil's one end is connected diode D2's negative pole, diode D2's positive pole is connected input capacitor C3's one end, input capacitor C3's the other end is connected transformer T2 secondary coil's the other end.

2. An auxiliary power supply for a rail emergency power supply according to claim 1, wherein the auxiliary power supply circuit is adapted to supply power to the control system module by converting the dc voltage provided by the external fault signal into control power by the start-up signal circuit of the emergency power supply.

3. The auxiliary power supply of a rail emergency power supply according to claim 1, wherein the control system module is configured to collect an externally input fault signal and control the operation of the DC/AC inverter circuit.

4. An auxiliary power supply for a rail emergency power supply as claimed in claim 1, wherein said precharge circuit comprises: a precharge contactor KM1, a main electric contactor KM2, and a precharge resistor R1;

the one end of precharge contactor KM1 is connected with the external direct current input positive terminal, the other end of precharge contactor KM1 is connected with one end of precharge resistor R1, the other end of precharge resistor R1 is connected with one end of main electric contactor KM2 and the input end of DC/AC inverter circuit respectively, the other end of main electric contactor KM2 is connected with the external direct current input positive terminal.

5. An auxiliary power supply for a rail emergency power supply according to claim 1, wherein the output of the DC/AC inverter circuit is provided as an output of the emergency power supply.