Protection electric control system and control method for battery charger in iron mixing car capping device

Abstract

The invention discloses a protection electric control system and control method for a battery charger in a torpedo car capping device, and the protection electric control system is characterized in that a circuit breaker, an open-phase protector, an AC contactor and the like are respectively arranged in a charging main loop at two sides of a torpedo car; a normally-closed auxiliary contact of each open-phase protector and a normally-closed auxiliary contact of an opposite alternating-current contactor are connected in series in a control loop of a coil of the corresponding alternating-current contactor to form interlocking, so that when one side is normally charged, a charging interface of a covering operation box on the other side is not electrified, and the electric shock risk of operators is reduced; meanwhile, under the action of the open-phase protector, the control loop can be switched off when the external power supply is open-phase, open-zero, over-voltage and under-voltage, so that the charging main loop is switched off, and the risk that the battery charger is burnt down is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical equipment, and in particular relates to a protective electric control system and a control method for a battery charger in a cover device of a mixed-rail vehicle. Background Art

[0002] Mixed-iron cars are mainly used for the transportation of molten iron, and their tank mouths are usually equipped with a capping device. The main function of the capping device of the mixed-iron car is to reduce the temperature drop of the molten iron in the mixed-iron car and reduce smoke and dust emissions. The electronic control part of the capping device of the mixed-iron car includes a battery pack, a battery charger, an electric control box, a DC / DC converter, etc. The above electronic control components are all installed in the electrical room of the mixed-iron car. The battery charger and the battery pack are both installed on the floor of the electrical room and connected by cables. The input power of the battery charger is generally an AC 380V three-phase four-wire power supply. In order to facilitate the operation of the capping device, the mixed-iron car is usually provided with a capping operation box on both sides, and a charging interface is provided on the capping operation box, and then the charging interfaces on both sides are connected to the battery charger in the electrical room of the mixed-iron car through a cable. Depending on the location of the external power supply, any side of the mixed-iron car can be selected for charging. During charging, if the external power supply line has a zero or phase failure, it will often cause damage to the battery charger. In addition, since the operating boxes on both sides of the hybrid car can operate the covering device, when charging is performed on one side, the charging interface on the other side will also be energized because the cable on the other side is also connected to the battery charger, posing a safety hazard. Summary of the invention

[0003] The present invention provides a protective electric control system and a control method for a battery charger in a hybrid car covering device. When an external power supply circuit fails, the power supply of the battery charger can be disconnected to protect the battery charger from being burned. When a charging interface on one side of the hybrid car is supplying power to the battery charger, the circuit is cut off relative to the charging interface on the other side through the interlocking of the electrical circuit, so that the charging interface on the other side is not powered, thereby improving the safety factor.

[0004] The technical solution of the present invention to solve the technical problem is as follows:

[0005] The present invention discloses a protective electric control system for a battery charger in a cover device for a mixed-rail vehicle. The cover device comprises a first cover operation box, a second cover operation box, a current charger and a battery pack. The first cover operation box and the second cover operation box are respectively provided with a first charging interface and a second charging interface. The first charging interface and the second charging interface are respectively connected to the current charger through a first power cable and a second power cable. The current charger is connected to the battery pack through a third power cable. The protective electric control system comprises a first circuit breaker, a second circuit breaker, a first phase-loss protector, a second phase-loss protector, a first AC contactor and a second AC contactor. The first circuit breaker and the first AC contactor are respectively arranged on the first power cable in sequence. The second circuit breaker and the second AC contactor are respectively arranged on the first power cable in sequence. The first phase loss protector is arranged on the second power cable, the voltage terminal of the first phase loss protector is connected in parallel to the first power cable between the first circuit breaker and the first AC contactor, the voltage terminal of the second phase loss protector is connected in parallel to the second power cable between the second circuit breaker and the second AC contactor, the coil of the first AC contactor, the breaking auxiliary contact of the first phase loss protector, the breaking auxiliary contact of the second AC contactor and the first power cable between the first circuit breaker and the first AC contactor are connected in series through a control cable to form a first control circuit, and the coil of the second AC contactor, the breaking auxiliary contact of the second phase loss protector, the breaking auxiliary contact of the first AC contactor and the second power cable between the second circuit breaker and the second AC contactor are connected in series through a control cable to form a second control circuit.

[0006] Furthermore, the first power cable and the second power cable are both three-phase four-wire power cables, the first circuit breaker and the second circuit breaker are both four-pole circuit breakers, the first AC contactor and the second AC contactor are both four-pole AC contactors, and the first phase loss protector and the second phase loss protector are both three-phase phase loss protectors; the main contacts of the first charging interface, the first circuit breaker, the first phase loss protector and the first AC contactor are respectively connected to the phase lines and the neutral line corresponding to the first power cable, and the first control loop is connected to one of the phase lines and the neutral line of the first power cable; the main contacts of the second charging interface, the second circuit breaker, the second phase loss protector and the second AC contactor are respectively connected to the phase lines and the neutral line corresponding to the second power cable, and the second control loop is connected to one of the phase lines and the neutral line of the second power cable.

[0007] Furthermore, the first control loop and the second control loop are provided with a first fuse and a second fuse respectively.

[0008] Furthermore, the first cover operation box and the second cover operation box are respectively provided with a first charging indicator light and a second charging indicator light, the first charging indicator light, the closing auxiliary contact of the first AC contactor and the first power cable between the first AC contactor and the battery charger are connected in series through a control cable to form a first indicator light circuit, and the second charging indicator light, the closing auxiliary contact of the second AC contactor and the second power cable between the second AC contactor and the battery charger are connected in series through a control cable to form a second indicator light circuit.

[0009] Furthermore, a third fuse and a fourth fuse are respectively provided on the first indicator light circuit and the second indicator light circuit.

[0010] The present invention provides a control method for a protective electronic control system of a battery charger in a hybrid railcar capping device based on the above technical solution, comprising:

[0011] After the first charging interface is connected to the AC power supply, the first circuit breaker is closed, and the current is transmitted to the first phase-loss protector through the first power cable so that it is energized and tested; if the first phase-loss protector detects that there is no fault, at the same time, the break-and-go auxiliary contacts of the first phase-loss protector in the first control circuit connected in series with the first AC contactor coil and the break-and-go auxiliary contacts of the second AC contactor are interlocked, and if the second charging interface on one side of the second covered operation box has no power, the coil of the first AC contactor in the first control circuit is energized, the main contacts of the first AC contactor on the first power cable are closed to connect the main circuit, and the battery charger obtains AC power and charges the battery pack;

[0012] After the second charging interface is connected to the AC power supply, the second circuit breaker is closed, and the current is transmitted to the second phase loss protector through the second power cable to energize it and perform detection; if the second phase loss protector detects that there is no fault, at the same time, the moving-breaking auxiliary contacts of the second phase loss protector in the second control circuit connected in series with the second AC contactor coil and the moving-breaking auxiliary contacts of the first AC contactor form an interlocking, if the first charging interface on one side of the first covered operating box has no power, the coil of the second AC contactor in the second control circuit is energized, the second AC contactor main contacts on the second power cable are closed to connect the main circuit, and the battery charger obtains AC power and charges the battery pack.

[0013] Compared with the original charging method in the prior art, the protective electronic control system for the battery charger in the hybrid car covering device described in the present invention has a simple circuit structure. By setting two circuit breakers, two phase loss protectors and two AC contactors, and connecting the moving and breaking auxiliary contacts of each phase loss protector and the moving and breaking auxiliary contacts of the opposite AC contactor in series in the control circuit of the corresponding AC contactor coil, an interlock is formed, so that when one side is charged normally, the charging interface of the covering operation box on the other side is not energized, reducing the risk of electric shock for operators; in addition, through the action of the phase loss protector, when the external power supply has phase loss, zero loss, overvoltage or undervoltage, the control circuit can be disconnected, and then the main charging circuit can be disconnected, thereby avoiding the risk of burning the battery charger. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the design of the electric control system in the present invention;

[0015] Figure 2 It is a schematic diagram of the principle of the electric control system in the present invention;

[0016] In the figure: 1. first covered operation box; 2. second covered operation box; 3. current charger; 4. battery pack; 5. first power cable; 6. second power cable; 7. first control circuit; 8. second control circuit; 9. first indicator light circuit; 10. second indicator light circuit; 11. third power cable; QF1. first circuit breaker; QF2. second circuit breaker; BH1. first phase failure protector; BH2. second phase failure protector; KM1. first AC contactor; KM2. second AC contactor; FU1. first fuse; FU2. second fuse; FU3. third fuse; FU4. fourth fuse; CDJK1. first charging interface; CDJK2. second charging interface; RD1. first charging indicator light; RD2. second charging indicator light. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the usual meanings understood by people with general skills in the field to which the present disclosure belongs. "Up", "down", "left", "right", "front", "back" and the like used in the patent application specification and claims of the present disclosure are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly; "connected" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The parts not described in detail in the present invention are all known technologies of technicians in the field of this technology.

[0018] Embodiment 1:

[0019] like Figure 1 and Figure 2 As shown, the present invention is a protective electronic control system for a battery charger in a hybrid car covering device, the covering device comprising a first covering operation box 1, a second covering operation box 2, a current charger 3 and a battery pack 4, the first covering operation box 1 and the second covering operation box 2 are respectively provided with a first charging interface CDJK1 and a second charging interface CDJK2 for obtaining an external power supply; the first charging interface CDJK1 and the second charging interface CDJK2 are respectively connected to the AC input end of the current charger 3 through a first power cable 5 and a second power cable 6, and the DC output end of the current charger 3 is connected to the battery pack 4 through a third power cable 11, for charging the battery pack 4.

[0020] The protective electric control system in this embodiment includes a first circuit breaker QF1, a second circuit breaker QF2, a first phase loss protector BH1, a second phase loss protector BH2, a first AC contactor KM1 and a second AC contactor KM2. The first phase loss protector BH1 and the second phase loss protector BH2 ​​both have protection functions such as phase loss, zero loss, overvoltage and undervoltage. The first circuit breaker QF1 and the first AC contactor KM1 are respectively arranged on the first power cable 5 in sequence, and the second circuit breaker QF2 and the second AC contactor KM2 are respectively arranged on the second power cable 6 in sequence. The voltage terminals of the first phase loss protector BH1 are connected in parallel to the corresponding phase line and neutral line of the first power cable 5 between the first circuit breaker QF1 and the first AC contactor KM1. The second phase loss protector BH1 and the second AC contactor KM2 are respectively arranged on the second power cable 6 in sequence. The voltage terminals of the protector BH2 ​​are connected in parallel to the corresponding phase line and neutral line of the second power cable 6 between the second circuit breaker QF2 and the second AC contactor KM2. The coil of the first AC contactor KM1, the breaking auxiliary contact of the first phase loss protector BH1, the breaking auxiliary contact of the second AC contactor KM2 and the first power cable 5 between the first circuit breaker QF1 and the first AC contactor KM1 are connected in series through a control cable to form a first control loop 7. The coil of the second AC contactor KM2, the breaking auxiliary contact of the second phase loss protector BH2, the breaking auxiliary contact of the first AC contactor KM1 and the second power cable 6 between the second circuit breaker QF2 and the second AC contactor KM2 are connected in series through a control cable to form a second control loop 8. Interlocking is formed by the breaking auxiliary contacts of the first phase loss protector BH1 and the breaking auxiliary contacts of the second AC contactor KM2 in the first control circuit 7, and interlocking is formed by the breaking auxiliary contacts of the second phase loss protector BH2 ​​and the breaking auxiliary contacts of the first AC contactor KM1 in the second control circuit 8, so that when one side is energized, the other side is de-energized.

[0021] Taking the power supply mode of three-phase four-wire AC power supply as an example, as a preferred implementation mode, the first power cable 5 and the second power cable 6 are both three-phase four-wire power cables, the first circuit breaker QF1 and the second circuit breaker QF2 are both four-pole circuit breakers, the first AC contactor KM1 and the second AC contactor KM2 are both four-pole AC contactors, and the first phase loss protector BH1 and the second phase loss protector BH2 ​​are both three-phase phase loss protectors; the first charging interface CDJK1, the first circuit breaker QF1, the first phase loss protector BH1 and the first AC The main contacts of the current contactor KM1 are respectively connected to the corresponding phase lines and neutral lines of the first power cable 5, and the first control loop 7 is connected to one of the phase lines and the neutral line of the first power cable 5 to obtain 220V AC power; the main contacts of the second charging interface CDJK2, the second circuit breaker QF2, the second phase failure protector BH2 ​​and the second AC contactor KM2 are respectively connected to the corresponding phase lines and neutral lines of the second power cable 6, and the second control loop 8 is connected to one of the phase lines and the neutral line of the second power cable 6 to obtain 220V AC power.

[0022] In order to improve the safety of the first control loop 7 and the second control loop 8, as a preferred embodiment, the first control loop 7 and the second control loop 8 are respectively provided with a first fuse FU1 and a second fuse FU2.

[0023] In order to more intuitively know whether the first covered operation box 1 and the second covered operation box 2 are energized, the first covered operation box 1 and the second covered operation box 2 are respectively provided with a first charging indicator light RD1 and a second charging indicator light RD2. The first charging indicator light RD1, the closing auxiliary contact of the first AC contactor KM1 and the first power cable 5 between the first AC contactor KM1 and the battery charger 3 are connected in series through a control cable to form a first indicator light circuit 9. The second charging indicator light RD2, the closing auxiliary contact of the second AC contactor KM2 and the second power cable 6 between the second AC contactor KM2 and the battery charger 3 are connected in series through a control cable to form a second indicator light circuit 10.

[0024] In order to improve the safety of the first warning light circuit 9 and the second indicator light circuit 9, as a preferred embodiment, the first indicator light circuit 9 and the second indicator light circuit 10 are respectively provided with a third fuse FU3 and a fourth fuse FU4.

[0025] Example 2

[0026] The present invention provides a control method for a protective electronic control system of a battery charger in a cover device for a mixed-rail vehicle based on Embodiment 1, which comprises:

[0027] After the first charging interface CDJK1 is connected to the three-phase four-wire AC power supply, the first circuit breaker QF1 is closed, and the current is transmitted to the first phase-loss protector BH1 through the first power cable 5 so that it is powered and tested; if the first phase-loss protector BH1 detects that there is no fault, at the same time, the moving-breaking auxiliary contact of the first phase-loss protector BH1 and the moving-breaking auxiliary contact of the second AC contactor KM2 in the first control circuit 7 connected in series with the coil of the first AC contactor KM1 are interlocked. If the second charging interface CDJK2 on one side of the second cover operation box 2 is without power, the first AC contactor KM2 in the first control circuit 7 is turned off. The coil of M1 is energized, the main contact of the first AC contactor KM1 on the first power cable 5 is closed to connect the main charging circuit, the battery charger 3 obtains AC power and charges the battery pack 4, and at the same time, the first indicator light circuit 9 is energized, and the first charging indicator light RD1 is on; because in the second control circuit 8 on the side of the second cover operation box 2, the coil of the second AC contactor KM2 and the auxiliary contacts of the first AC contactor KM1 are connected in series to form an interlocking circuit, the second AC contactor KM2 on this side cannot operate, and the second charging interface CDJK2 on the side of the second cover operation box 2 has no return power. When the external power supply fails, the first phase loss protector BH1 is activated, the coil of the first AC contactor KM1 on this side loses power, the main circuit is also powered off, and the battery charger 3 stops charging, ensuring that the charger is not burned. When the power supply is normal, charging is automatically resumed.

[0028] Similarly, after the second charging interface CDJK2 is connected to the AC power supply, the second circuit breaker QF2 is closed, and the current is transmitted to the second phase loss protector BH2 ​​through the second power cable 6 to energize it and perform detection; if the second phase loss protector BH2 ​​detects that there is no fault, at the same time, the moving and breaking auxiliary contacts of the second phase loss protector BH2 ​​and the moving and breaking auxiliary contacts of the first AC contactor KM1 in the second control circuit 8 connected in series with the coil of the second AC contactor KM2 form an interlocking, and if the first charging interface CDJK1 on one side of the first covered operating box 1 has no power, the coil of the second AC contactor KM2 in the second control circuit 8 is energized, and the main contacts of the second AC contactor KM2 on the second power cable 6 are closed to connect the main circuit, and the battery charger 3 obtains AC power and charges the battery pack 4. At the same time, the second indicator light circuit 10 is energized, and the second charging indicator light RD2 lights up. Since the coil of the first AC contactor KM1 is connected in series with the break-and-go auxiliary contacts of the second AC contactor KM2 in the first control circuit 7 on one side of the first cover operation box 1 to form an interlocking circuit, the first AC contactor KM1 on this side cannot operate, and the first charging interface CDJK1 on the first cover operation box 1 has no return power. When the external power supply fails, the second phase-loss protector BH2 ​​operates, the coil of the second AC contactor KM2 on this side loses power, the main circuit is powered off at the same time, and the battery charger 3 stops charging, ensuring that the charger is not burned. When the power supply is normal, charging is automatically resumed.

Claims

1. A protective electronic control system for a battery charger in a hybrid rail vehicle capping device, the capping device comprising a first capping operation box (1), a second capping operation box (2), a current charger (3) and a battery pack (4), the first capping operation box (1) and the second capping operation box (2) are respectively provided with a first charging interface (CDJK1) and a second charging interface (CDJK2), the first charging interface (CDJK1) and the second charging interface (CDJK2) are respectively connected to the current charger (3) via a first power cable (5) and a second power cable (6), the current charger (3) is connected to the battery pack (4) via a third power cable (11), characterized in that: The protective electric control system comprises a first circuit breaker (QF1), a second circuit breaker (QF2), a first phase-loss protector (BH1), a second phase-loss protector (BH2), a first AC contactor (KM1) and a second AC contactor (KM2); the first circuit breaker (QF1) and the first AC contactor (KM1) are respectively arranged on the first power cable (5) in sequence; the second circuit breaker (QF2) and the second AC contactor (KM2) are respectively arranged on the second power cable (6) in sequence; a voltage terminal of the first phase-loss protector (BH1) is connected in parallel to the first power cable (5) between the first circuit breaker (QF1) and the first AC contactor (KM1); a voltage terminal of the second phase-loss protector (BH2) is connected in parallel to the first power cable (5) between the first circuit breaker (QF1) and the first AC contactor (KM1); On the second power cable (6) between the second circuit breaker (QF2) and the second AC contactor (KM2), the coil of the first AC contactor (KM1), the break auxiliary contact of the first phase loss protector (BH1), the break auxiliary contact of the second AC contactor (KM2), and the first power cable (5) between the first circuit breaker (QF1) and the first AC contactor (KM1) are connected in series via a control cable to form a first control loop (7), and the coil of the second AC contactor (KM2), the break auxiliary contact of the second phase loss protector (BH2), the break auxiliary contact of the first AC contactor (KM1), and the second power cable (6) between the second circuit breaker (QF2) and the second AC contactor (KM2) are connected in series via a control cable to form a second control loop (8).

2. A protective electronic control system for a battery charger in a hybrid car covering device according to claim 1, wherein the first power cable (5) and the second power cable (6) are both three-phase four-wire power cables, the first circuit breaker (QF1) and the second circuit breaker (QF2) are both four-pole circuit breakers, the first AC contactor (KM1) and the second AC contactor (KM2) are both four-pole AC contactors, the first phase loss protector (BH1) and the second phase loss protector (BH2) are both three-phase phase loss protectors; the first charging interface (CDJK1), the first circuit breaker (QF1), The main contacts of the first phase-loss protector (BH1) and the first AC contactor (KM1) are respectively connected to the phase lines and neutral lines corresponding to the first power cable (5), and the first control circuit (7) is connected to one of the phase lines and the neutral line of the first power cable (5); the main contacts of the second charging interface (CDJK2), the second circuit breaker (QF2), the second phase-loss protector (BH2) and the second AC contactor (KM2) are respectively connected to the phase lines and the neutral line corresponding to the second power cable (6), and the second control circuit (8) is connected to one of the phase lines and the neutral line of the second power cable (6).

3. The protective electronic control system for a battery charger in a hybrid rail car covering device according to claim 1 is characterized in that a first fuse (FU1) and a second fuse (FU2) are respectively provided on the first control circuit (7) and the second control circuit (8).

4. A protective electric control system for a battery charger in a hybrid railcar covering device according to claim 1, wherein the first covering operation box (1) and the second covering operation box (2) are respectively provided with a first charging indicator light (RD1) and a second charging indicator light (RD2); the first charging indicator light (RD1), the closing auxiliary contact of the first AC contactor (KM1) and the first power cable (5) between the first AC contactor (KM1) and the battery charger (3) are connected in series via a control cable to form a first indicator light circuit (9); the second charging indicator light (RD2), the closing auxiliary contact of the second AC contactor (KM2) and the second power cable (6) between the second AC contactor (KM2) and the battery charger (3) are connected in series via a control cable to form a second indicator light circuit (10).

5. The protective electronic control system for a battery charger in a hybrid railcar covering device according to claim 4, wherein a third fuse (FU3) and a fourth fuse (FU4) are respectively provided on the first indicator light circuit (9) and the second indicator light circuit (10).

6. A control method for the protective electronic control system of the battery charger in the cover device of a mixed-rail vehicle based on any one of claims 1 to 5, characterized in that: include: After the first charging interface (CDJK1) is connected to the AC power supply, the first circuit breaker (QF1) is closed, and the current is transmitted to the first phase-loss protector (BH1) through the first power cable (5) so that it is energized and tested; if the first phase-loss protector (BH1) detects that there is no fault, at the same time, the break-and-go auxiliary contacts of the first phase-loss protector (BH1) and the break-and-go auxiliary contacts of the second AC contactor (KM2) in the first control circuit (7) connected in series with the coil of the first AC contactor (KM1) are interlocked, and if the second charging interface (CDJK2) on the side of the second cover operation box (2) is without power, the coil of the first AC contactor (KM1) in the first control circuit (7) is energized, the main contacts of the first AC contactor (KM1) on the first power cable (5) are closed to connect the main circuit, and the battery charger (3) obtains AC power and charges the battery pack (4); After the second charging interface (CDJK2) is connected to the AC power supply, the second circuit breaker (QF2) is closed, and the current is transmitted to the second phase loss protector (BH2) through the second power cable (6) so that it is energized and tested; if the second phase loss protector (BH2) detects that there is no fault, at the same time, the second phase loss protector (BH2) in the second control circuit (8) connected in series with the coil of the second AC contactor (KM2) and the first AC contactor (KM1) are interlocked, and if the first charging interface (CDJK1) on the side of the first cover operation box (1) is without power, the coil of the second AC contactor (KM2) in the second control circuit (8) is energized, the main contact of the second AC contactor (KM2) on the second power cable (6) is closed to connect the main circuit, and the battery charger (3) obtains AC power and charges the battery pack (4).

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