Power supply control device of screw air compressor

Abstract

The utility model relates to a power supply control device of a screw air compressor, which comprises a main board connected with a detection board, the detection board is connected with a driving board, a first connecting line is arranged on the main board, a first switch is arranged on the first connecting line, the first connecting line is connected with a second connecting line, and the second connecting line is connected with a first bridge rectifier. A frequency converter connecting end is arranged at the end of the second connecting line; the end part of the first connecting line is connected with a third connecting line, the third connecting line is connected with the first diode and the second diode, and the third connecting line is connected with a fourth connecting line; the first diode and the second diode are connected in parallel with a first triode and a second triode; a fifth connecting line is connected between the first diode and the second diode, the fifth connecting line is connected with an inductor and a current transformer, and the other end of the fifth connecting line is provided with a battery pack anode connecting end. The beneficial effects of the utility model are that the air compressor is ensured not to be influenced by the pantograph falling power-off of the pantograph in the operation process, and power is continuously supplied to the air compressor.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply equipment, in particular to a power supply control device for a screw air compressor. Background Art

[0002] Electric locomotives are crucial equipment for mine rail transportation, serving as a form of traction equipment for rail vehicles. They utilize a traction motor to drive the wheels, which in turn are driven by friction between the wheels and the rail surface, keeping the locomotive on track. An air compressor is a device used to compress air. Similar in structure to a water pump, most air compressors use reciprocating pistons with rotating vanes or screws. Air is primarily used for braking the locomotive and as a primary energy source for unloading ore from mine cars. The use of screw air compressors in locomotives represents an exploration and innovation. Screw air compressors offer a simple structure and are easy to maintain. Complex repairs can be resolved by simply replacing a few wearing parts, resulting in low maintenance costs. During the air compression process, they ensure efficient and stable air supply, with low noise and vibration, stable and reliable operation, meeting the continuous air supply requirements of production. With advantages such as high energy efficiency, strong stability, and low maintenance costs, they are suitable for industrial production applications requiring a continuous air supply and meet the operational needs of electric locomotives.

[0003] When the screw air compressor is in use on an electric locomotive, the pantograph of the electric locomotive is lowered, and the power is suddenly cut off during the loading process of the air compressor, causing the air compressor to overload and spray oil, resulting in the air compressor being unable to be used normally.

[0004] Therefore, it is necessary to design an air compressor power supply control device that can ensure uninterrupted power supply to the air compressor. The air compressor will not be affected by the power outage caused by the pantograph during operation. The air compressor will continue to run, avoiding overload failures and oil injection problems caused by sudden power outages of the air compressor. Utility Model Content

[0005] The purpose of the utility model is to provide a screw air compressor power supply control device with reasonable structural design, ingenious conception, convenient processing and manufacturing, low processing cost, energy saving and environmental protection, ensuring that the air compressor is not affected by the power outage caused by the pantograph during operation, continuously supplying power to the air compressor, and avoiding various problems caused by power outages.

[0006] The utility model discloses a power supply control device for a screw air compressor, comprising a main board, which is connected to a detection board, which is connected to a drive board, a first connection circuit being provided on the main board, a first switch being fixedly installed at one end of the first connection circuit, a second connection circuit being connected at the other end thereof, a first rectifier bridge stack being fixedly connected to the second connection circuit, and a frequency converter connection end being provided at the end thereof; a third connection circuit being connected at the end thereof, a first diode and a second diode being fixedly connected to the third connection circuit, and the third connection circuit being connected to a fourth connection circuit; a first transistor and a second transistor being connected in parallel to the first diode and the second diode; a fifth connection circuit being connected between the first diode and the second diode, an inductor being fixedly connected to the fifth connection circuit, an end of the fifth connection circuit being connected between the first transistor and the second transistor, a current transformer being connected to the fifth connection circuit, and a positive electrode connection end of a battery pack being provided at the other end thereof.

[0007] The inverter connection end is used to connect the inverter. The first diode and the second diode are fixedly connected on the third connection line. Their function is to increase the switching speed of the circuit, reduce the reverse leakage current and increase the response speed of the inverter circuit. The first diode and the second diode are connected in parallel with the first transistor and the second transistor, which are called IGBT modules; the fifth connection line is fixedly connected with an inductor. When the current passes through the inductor, it has a certain delay effect, thereby realizing the delay control of the circuit; the fifth connection line is connected with a current transformer, which can monitor the current of the battery pack when it is working; the main board, detection board and drive board are set to realize the charging and discharging of the battery pack and realize uninterrupted power supply operation of the air compressor.

[0008] A third capacitor is connected in parallel to the first diode and the second diode.

[0009] A third capacitor is connected in parallel to the first diode and the second diode to reduce the rate of change of the voltage domain current generated by the IGBT module during the switching process, reduce electromagnetic interference during the switching process of the IGBT module, and reduce the capacitance between the gate and collector of the IGBT module.

[0010] The second connection line is connected to the sixth connection line, which is arranged between the first rectifier bridge stack and the inverter connection end. The second rectifier bridge stack, the fuse and the normally open point of the contactor are fixedly connected to the sixth connection line. The end of the sixth connection line is connected to the positive connection end of the battery pack, the positive connection end of the battery pack is connected to the seventh connection line, the seventh connection line is connected to the battery pack, and the end of the seventh connection line is provided with the negative connection end of the battery pack, and the negative connection end of the battery pack is connected to the eighth connection line.

[0011] The sixth connection line is fixedly connected to the second rectifier bridge stack, the fuse and the normally open point of the contactor. When the input 550V power supply is disconnected, the coil of the contactor is energized, connecting the battery pack and the inverter to continuously power the inverter; the end of the sixth connection line is connected to the positive connection terminal of the battery pack, the positive connection terminal of the battery pack is connected to the seventh connection line, and the end of the seventh connection line is provided with the negative connection terminal of the battery pack.

[0012] The second switch and the third rectifier bridge stack are fixedly connected to the third connecting line, and the ninth connecting line is connected to the third connecting line.

[0013] The third connection line is fixedly connected to a second switch and a third rectifier bridge stack. When the 550V power supply is turned on, the second switch is closed and the driver board starts working. When it is detected that the 550V power supply is disconnected, the driver board works, the IGBT is closed, and the battery pack starts to supply power.

[0014] The second connecting line is connected to the tenth connecting line, the end of the tenth connecting line is connected to the power supply, one side of the power supply is connected to the eleventh connecting line, the end of the eleventh connecting line is connected to the negative electrode connection end of the battery pack, and the other side of the power supply is connected to the normally open point of the time relay and the cooling fan.

[0015] One side of the power supply is connected to the normally open point of the time relay and the cooling fan. The normally open point of the time relay is set. When the 550V power supply is connected, the time relay starts to work. When the set time ends, the time relay coil is energized and the normally open point is connected, driving the cooling fan to start working and dissipate heat from the power supply device. The cooling fan can be used to dissipate heat from the power supply device to prevent various problems caused by overtemperature.

[0016] Beneficial effects of the utility model:

[0017] 1) The inverter connection terminal is used to connect the inverter. The first diode and the second diode are fixedly connected to the third connection line. Their function is to increase the switching speed of the circuit, reduce the reverse leakage current and increase the response speed of the inverter circuit. The first diode and the second diode are connected in parallel with the first transistor and the second transistor, which are called IGBT modules; the fifth connection line is fixedly connected with an inductor. When the current passes through the inductor, it has a certain delay effect, thereby realizing the delay control of the circuit; the fifth connection line is connected with a current transformer, which can monitor the current of the battery pack when it is working; the main board, detection board and drive board are set to realize the charging and discharging of the battery pack and realize uninterrupted power supply operation of the air compressor.

[0018] 2) A third capacitor is connected in parallel to the first diode and the second diode to reduce the rate of change of the voltage domain current generated by the IGBT module during the switching process, reduce electromagnetic interference during the switching process of the IGBT module, and reduce the capacitance between the gate and collector of the IGBT module.

[0019] 3) The sixth connecting line is fixedly connected to the second rectifier bridge stack, fuse and contactor normally open point. When the input 550V power supply is disconnected, the coil of the contactor is energized, connecting the battery pack and the inverter to continuously power the inverter; the end of the sixth connecting line is connected to the positive connection terminal of the battery pack, and the positive connection terminal of the battery pack is connected to the seventh connecting line. The end of the seventh connecting line is provided with the negative connection terminal of the battery pack.

[0020] 4) The third connection line is fixedly connected to a second switch and a third rectifier bridge stack. When the 550V power supply is turned on, the second switch is closed and the driver board starts working. When it is detected that the 550V power supply is disconnected, the driver board starts working, the IGBT is closed, and the battery pack starts supplying power.

[0021] 5) A time relay normally open point and a cooling fan are connected to one side of the power supply. The time relay normally open point is set. When the 550V power supply is connected, the time relay starts to work. When the set time is over, the time relay coil is energized and the normally open point is connected, driving the cooling fan to start working and dissipate heat from the power supply device. The cooling fan can be used to dissipate heat from the power supply device to prevent various problems caused by overtemperature.

[0022] 6) The device has a reasonable structural design, ingenious conception, convenient processing and manufacturing, low processing cost, energy saving and environmental protection, ensuring that the air compressor is not affected by the power outage of the pantograph during operation, continuously supplying power to the air compressor, and the air compressor will keep running, avoiding overload failure and oil injection caused by sudden power outage of the air compressor. It has been put into use with good results. The battery pack is charged through the power control device and the battery pack stores electrical energy. If the 550DC power supply of the pantograph is cut off, the battery pack energy is inverted into a voltage of 550DC and 24DC through the controller to power the air compressor inverter and the air compressor. The air compressor achieves uninterrupted power supply operation, reduces air compressor failures, and extends the service life of the air compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the utility model;

[0024] Figure 2 It is a schematic diagram of the structural principle of the utility model.

[0025] In the figure: first switch 1, first connecting line 2, third rectifier bridge stack 3, first resistor 4, second resistor 5, second connecting line 6, first capacitor 7, first transistor 8, second capacitor 9, second transistor 10, first rectifier bridge stack 11, first diode 12, inductor 13, current transformer 14, second diode 15, second rectifier bridge stack 16, fuse 17, contactor normally open point 18, battery pack positive connection terminal 19, battery pack 20, battery pack negative connection terminal 21, inverter connection terminal 22, power supply 23, time relay normally open point 24, cooling fan 25, second switch 26, third connecting line 27, eighth connecting line 28, ninth connecting line 29, fifth connecting line 30, third capacitor 31, sixth connecting line 32, seventh connecting line 33, tenth connecting line 34, eleventh connecting line 35, main board 36, detection board 37, drive board 38. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] The utility model includes a first switch 1, a first connecting line 2, a third rectifier bridge stack 3, a first resistor 4, a second resistor 5, a second connecting line 6, a first capacitor 7, a first transistor 8, a second capacitor 9, a second transistor 10, a first rectifier bridge stack 11, a first diode 12, an inductor 13, a current transformer 14, a second diode 15, a second rectifier bridge stack 16, a fuse 17, a contactor normally open point 18, a battery pack positive connection terminal 19, a battery pack 20, a battery pack negative connection terminal 21, a frequency converter The device connection terminal 22, the power supply 23, the time relay normally open point 24, the cooling fan 25, the second switch 26, the third connection line 27, the eighth connection line 28, the ninth connection line 29, the fifth connection line 30, the third capacitor 31, the sixth connection line 32, the seventh connection line 33, the tenth connection line 34, the eleventh connection line 35, the main board 36, the detection board 37, the driving board 38, and the specific structure include the main board 36, the main board 36 is connected to the detection board 37, the detection board 37 is connected to the driving board 3 8 connection, a first connection line 2 is provided on the main board 36, one end of the first connection line 2 is fixedly installed with a first switch 1, the other end of the first connection line 2 is connected to a second connection line 6, the second connection line 6 is fixedly connected to a first rectifier bridge stack 11, and the end of the second connection line 6 is provided with an inverter connection end 22; the end of the first connection line 2 is connected to a third connection line 27, the third connection line 27 is fixedly connected with a first diode 12 and a second diode 15, and the third connection line 27 is connected to the fourth connection line; the first diode 12 and the second diode 15 are connected in parallel with a first transistor 8 and a second transistor 10; a fifth connection line 30 is connected between the first diode 12 and the second diode 15, an inductor 13 is fixedly connected to the fifth connection line 30, the end of the fifth connection line 30 is connected between the first transistor 8 and the second transistor 10, the fifth connection line 30 is connected to a current transformer 14, and the other end of the fifth connection line 30 is provided with a battery pack positive connection end 19.

[0028] A third capacitor 31 is connected in parallel to the first diode 12 and the second diode 15 .

[0029] The second connecting line 6 is connected to the sixth connecting line 32, and the sixth connecting line 32 is arranged between the first rectifier bridge stack 11 and the inverter connection terminal 22. The second rectifier bridge stack 16, the fuse 17 and the contactor normally open point 18 are fixedly connected to the sixth connecting line 32. The end of the sixth connecting line 32 is connected to the positive connection terminal 19 of the battery pack, and the positive connection terminal 19 of the battery pack is connected to the seventh connecting line 33. The seventh connecting line 33 is connected to the battery pack 20. The end of the seventh connecting line 33 is provided with the negative connection terminal 21 of the battery pack, and the negative connection terminal 21 of the battery pack is connected to the eighth connecting line 28.

[0030] The second switch 26 and the third rectifier bridge stack 3 are fixedly connected to the third connecting line 27 , and the ninth connecting line 29 is connected to the third connecting line 27 .

[0031] The second connecting line 6 is connected to the tenth connecting line 34, the end of the tenth connecting line 34 is connected to the power supply 23, one side of the power supply 23 is connected to the eleventh connecting line 35, the end of the eleventh connecting line 35 is connected to the negative electrode connection terminal 21 of the battery pack, and the other side of the power supply 23 is connected to the normally open point 24 of the time relay and the cooling fan 25.

[0032] The model of the main board 36 is: ZXDFCONBV2; the model of the detection board 37 is: ZXDYPORTV2; the model of the driver board 38 is: ZX325SDRV.

[0033] Instructions for use: Set up the main board, detection board and driver board. When a 550V power supply is applied, the main board and detection board start up and monitor the equipment by setting parameters. When it detects that the conditions set by the program are met, the driver board starts working, the IGBT is turned on, and the battery pack starts to power the inverter.

[0034] The inverter connection terminal 22 is set for connecting the inverter. The first diode 12 and the second diode 15 are fixedly connected to the third connection line 27. Their function is to increase the switching speed of the circuit, reduce the reverse leakage current and increase the response speed of the inverter circuit. The first diode 12 and the second diode 15 are connected in parallel with the first transistor 8 and the second transistor 10, which are called IGBT modules; the fifth connection line 30 is fixedly connected with the inductor 13. When the current passes through the inductor 13, it plays a certain delay role, thereby realizing the delay control of the circuit; the fifth connection line 30 is connected with the current transformer 14, which can monitor the current of the battery pack when it is working; the main board 36, the detection board 37 and the drive board 38 are set to realize the charging and discharging of the battery pack and realize uninterrupted power supply operation of the air compressor.

[0035] A third capacitor 31 is connected in parallel to the first diode 12 and the second diode 15 to reduce the rate of change of the voltage domain current generated by the IGBT module during the switching process, reduce electromagnetic interference during the switching process of the IGBT module, and reduce the capacitance between the gate and collector of the IGBT module.

[0036] The sixth connection line 32 is fixedly connected to the second rectifier bridge stack 16, the fuse 17 and the contactor normally open point 18. When the input 550V power supply is disconnected, the coil of the contactor is energized, connecting the battery pack and the inverter to continuously power the inverter; the end of the sixth connection line 32 is connected to the positive connection terminal 19 of the battery pack, and the positive connection terminal 19 of the battery pack is connected to the seventh connection line 33. The end of the seventh connection line 33 is provided with the negative connection terminal 21 of the battery pack.

[0037] The second switch 26 and the third rectifier bridge stack 3 are fixedly connected to the third connecting line 27. When the 550V power supply is turned on, the second switch 26 is closed and the driver board starts working. When it is detected that the 550V power supply is disconnected, the driver board starts working, the IGBT is closed, and the battery pack starts supplying power.

[0038] One side of the power supply 23 is connected to a time relay normally open point 24 and a cooling fan 25. The time relay normally open point 24 is set. When the 550V power supply is connected, the time relay starts to work. When the set time ends, the time relay coil is energized and the normally open point is connected, driving the cooling fan to start working to dissipate heat from the power supply device.

Claims

1. A power supply control device for a screw air compressor, comprising a main board (36), characterized in that: The main board (36) is connected to the detection board (37), and the detection board (37) is connected to the drive board (38). A first connection line (2) is provided on the main board (36), one end of the first connection line (2) is fixedly mounted with a first switch (1), the other end of the first connection line (2) is connected to a second connection line (6), a first rectifier bridge stack (11) is fixedly connected to the second connection line (6), and an inverter connection end (22) is provided at the end of the second connection line (6); the end of the first connection line (2) is connected to a third connection line (27), and a first diode (12) and a second diode ( 15), the third connecting line (27) is connected to the fourth connecting line; the first diode (12) and the second diode (15) are connected in parallel with the first triode (8) and the second triode (10); a fifth connecting line (30) is connected between the first diode (12) and the second diode (15), an inductor (13) is fixedly connected to the fifth connecting line (30), an end of the fifth connecting line (30) is connected between the first triode (8) and the second triode (10), a current transformer (14) is connected to the fifth connecting line (30), and the other end of the fifth connecting line (30) is provided with a battery pack positive electrode connection terminal (19).

2. A screw air compressor power control device according to claim 1, characterized in that: A third capacitor (31) is connected in parallel to the first diode (12) and the second diode (15).

3. A power supply control device for a screw air compressor according to claim 2, characterized in that: The second connection line (6) is connected to the sixth connection line (32), and the sixth connection line (32) is arranged between the first rectifier bridge stack (11) and the inverter connection terminal (22). The second rectifier bridge stack (16), the fuse (17) and the contactor normally open point (18) are fixedly connected to the sixth connection line (32). The end of the sixth connection line (32) is connected to the positive connection terminal (19) of the battery pack, and the positive connection terminal (19) of the battery pack is connected to the seventh connection line (33). The seventh connection line (33) is connected to the battery pack (20), and the end of the seventh connection line (33) is provided with the negative connection terminal (21) of the battery pack, and the negative connection terminal (21) of the battery pack is connected to the eighth connection line (28).

4. A power supply control device for a screw air compressor according to claim 3, characterized in that: The second switch (26) and the third rectifier bridge stack (3) are fixedly connected to the third connecting line (27), and the ninth connecting line (29) is connected to the third connecting line (27).

5. A power supply control device for a screw air compressor according to claim 4, characterized in that: The second connecting line (6) is connected to a tenth connecting line (34), an end of the tenth connecting line (34) is connected to a power supply (23), one side of the power supply (23) is connected to an eleventh connecting line (35), an end of the eleventh connecting line (35) is connected to the negative electrode connection terminal (21) of the battery pack, and the other side of the power supply (23) is connected to a time relay normally open point (24) and a cooling fan (25).

Images