Topological structure of independent shaft control

Abstract

The invention discloses an independent shaft control topological structure which comprises a main transmission system and an auxiliary system, when no power battery exists, the main transmission system adopts an independent shaft control mode, and a transformer of the auxiliary system is provided with an independent auxiliary winding. According to the topological structure of the independent axle control, independent axle control of the whole locomotive can still be guaranteed when no power battery is additionally arranged, the locomotive can be accurately controlled and coordinated through the independent axle control no matter under complex road conditions or in a changeable operation environment, and when a single axle breaks down, only the power of the single axle is lost, so that the whole locomotive can be accurately controlled and coordinated through the independent axle control. The locomotive can utilize the power to the maximum extent for continuous application, so that the breakdown of the whole system caused by a single-shaft fault is avoided, the locomotive can utilize the residual power to the maximum extent for continuous operation, the maintenance cost and the operation risk of the locomotive can be reduced, and the overall performance of the locomotive is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of traction devices, and in particular to a topological structure of independent axle control, and in particular to a topological structure of independent axle control for a main drive circuit of an electric locomotive. Background Art

[0002] my country has a large number of electric locomotives, and the number of locomotives in use is dense. In the operation of electric locomotives, there are high requirements for the reliability of locomotive operation, and the topological structure of the main drive circuit of electric locomotives is also constantly upgraded. At the same time, with the development of modern rail transit equipment towards multi-source, there is a wide demand for the installation of power batteries in electric locomotives.

[0003] At present, there are two mainstream main transmission systems for electric locomotives, namely the shared intermediate DC link and the auxiliary independent winding. For the traction topology with the addition of power batteries, there is a topology based on the shared intermediate DC link. However, the locomotives currently used by the national railways are mass-produced models, and the scenario for adding power batteries is not clear. Leaving a battery installation interface for electric locomotives to facilitate modification is a method that can reach a consensus. The first two main transmission methods will have a certain degree of risk of the entire frame being removed in daily use.

[0004] like Figure 1 As shown, the current main transmission system shares the intermediate DC link, and the auxiliary transmission system is directly connected to the intermediate DC link. The intermediate voltage is DC1800V. Under normal operation, the three traction motors are rectified separately and then output to the intermediate DC link, and then output to the traction motor through inverter to supply power to the traction motor. If a power battery needs to be installed, the added power battery can also be connected to the intermediate DC link, and the power battery can supply power to the auxiliary and motor.

[0005] In the shared intermediate DC link mode, if a ground fault occurs in the intermediate DC link, the entire intermediate DC link will not work, resulting in simultaneous failure of the three traction motors and a reduction of 1 / 2 in the power of the entire vehicle.

[0006] In view of this, it is of great significance to develop a topological structure with fully independent axle control based on the addition of power batteries. Summary of the invention

[0007] The main purpose of the present invention is to provide a topological structure of independent axle control so that independent axle control of the whole vehicle can be guaranteed when no power battery is installed. Whether in complex road conditions or in a changeable operating environment, the locomotive can achieve precise control and coordination through independent axle control. When a single axle fails, only the power of the single axle is lost, so that the locomotive can maximize the use of power to continue to operate, thereby avoiding the paralysis of the entire system caused by a single axle failure. It also enables the locomotive to maximize the use of remaining power to continue operating, and also helps to reduce the maintenance cost and operating risk of the locomotive, and improve the overall performance of the locomotive.

[0008] According to one aspect of the present invention, a topological structure of independent shaft control is proposed, including a main transmission system and an auxiliary system, wherein, when there is no power battery, the main transmission system adopts an independent shaft control mode, and the transformer of the auxiliary system is provided with an independent auxiliary winding.

[0009] According to one embodiment of the present invention, the voltage of the independent auxiliary winding is a first value, and the auxiliary system includes a DC / AC inverter and an isolation transformer. After the independent auxiliary winding is inverted by the DC / AC inverter, the voltage is transformed by the isolation transformer to change the voltage to a second value.

[0010] According to an embodiment of the present invention, the first value is: DC1600V~DC2000V, and the second value is: AC360V~AC400V.

[0011] According to one embodiment of the present invention, when a power battery is installed, the power battery is connected to the motor side of the main transmission system and the auxiliary system.

[0012] According to one embodiment of the present invention, electrical isolation is included between the main transmission system and the auxiliary system.

[0013] According to an embodiment of the present invention, the topology structure further includes a redundant control system, which is communicatively connected with the main transmission system.

[0014] According to one embodiment of the present invention, a redundant control system includes a primary controller and a backup controller.

[0015] According to one embodiment of the present invention, a speed sensor and / or a position sensor is also provided on the main transmission system.

[0016] According to an embodiment of the present invention, the auxiliary system further includes a heat sink connected to the independent auxiliary winding.

[0017] According to an embodiment of the present invention, the auxiliary system includes at least one auxiliary load, and the auxiliary system dynamically adjusts the output voltage and current according to actual load conditions.

[0018] In a topological structure of independent axle control according to an embodiment of the present invention, independent axle control of the entire vehicle can be guaranteed even when no power battery is installed. The locomotive can achieve precise control and coordination through independent axle control regardless of complex road conditions or changing operating environments. When a single axle fails, only the power of the single axle is lost, so that the locomotive can maximize the use of power to continue operation, thereby avoiding paralysis of the entire system due to a single axle failure. The locomotive can also maximize the use of remaining power to continue operation, which helps to reduce the maintenance cost and operating risk of the locomotive and improve the overall performance of the locomotive. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required for use in the embodiment will be briefly introduced below. Obviously, the drawings described below are only some implementation cases of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 The topological structure diagram corresponding to the main transmission system and the auxiliary transmission system in the prior art is shown; Figure 2 A topological structure diagram of a main transmission system without a power battery according to an exemplary embodiment of the present invention is shown; Figure 3 A topological structure diagram of a main transmission system with a power battery according to an exemplary embodiment of the present invention is shown.

[0021] Description of reference numerals: 1. Main transmission system; 2. Auxiliary system; 3. Independent auxiliary winding; 4. Isolation transformer; 5. Power battery; 6. Auxiliary load. DETAILED DESCRIPTION

[0022] The detailed description of the following embodiments is used to exemplify the principles of the present invention, but cannot be used to limit the scope of the present invention. The present invention can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0023] The present invention provides these embodiments to make this disclosure thorough and complete, and fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of materials, numerical expressions and numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, rather than as limiting.

[0024] It should be noted that, in the description of the present invention, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0025] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0026] All terms used in the present invention have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0027] Technologies, methods, and apparatus known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, these technologies, methods, and apparatus should be considered part of the specification.

[0028] like Figure 2 As shown, the present invention provides a topological structure of independent shaft control, including a main transmission system 1 and an auxiliary system 2, wherein, when there is no power battery 5, the main transmission system 1 adopts an independent shaft control method, and the transformer of the auxiliary system 2 is provided with an independent auxiliary winding 3.

[0029] In the topological structure of the independent axle control according to the embodiment of the present invention, independent axle control of the whole vehicle can be guaranteed when the power battery 5 is not installed. Whether in complex road conditions or in a changeable operating environment, the locomotive can achieve precise control and coordination through independent axle control. When a single axle fails, only the power of the single axle is lost, so that the locomotive can maximize the use of power to continue to operate, thereby avoiding paralysis of the entire system due to a single axle failure, and allowing the locomotive to maximize the use of remaining power to continue operating, which also helps to reduce the maintenance cost and operating risk of the locomotive and improve the overall performance of the locomotive.

[0030] In some specific embodiments, the voltage of the independent auxiliary winding 3 is a first value, and the auxiliary system 2 includes a DC / AC inverter (not shown in the figure) and an isolation transformer 4. After the independent auxiliary winding 3 is inverted by the DC / AC inverter, the voltage is transformed to a second value by the isolation transformer 4. Through a reasonable auxiliary winding design, the output voltage can be stabilized, the voltage fluctuation can be reduced, and the stability of the power supply can be improved.

[0031] Based on the above embodiments, the first value is: DC1600V~DC2000V, and the second value is: AC360V~AC400V. Through the combination of the DC / AC inverter and the isolation transformer 4, the DC voltage of the auxiliary winding can be easily converted into an AC voltage and adjusted to the required voltage level. This conversion capability improves the flexibility and adaptability of the system, enabling it to meet the voltage requirements of different devices and loads. Through precise inversion and voltage transformation control, the stability and accuracy of the output voltage can be ensured. This helps to reduce voltage fluctuations and interference and improve the overall performance and stability of the system. In one embodiment, the first value is DC1800V and the second value is AC380V. AC380V voltage is a standard voltage level in many industrial equipment and commercial applications. Therefore, this conversion process enables the auxiliary system 2 to be widely used in various occasions to provide stable and reliable power supply for different loads.

[0032] like Figure 3 As shown, on the basis of the above embodiments, when the power battery 5 is installed, the power battery 5 is connected to the motor side of the main transmission system 1 and the auxiliary system 2 to ensure that the power battery 5 can normally supply power to the motor and the auxiliary system 2. The motor is a key component in the electric transmission system, responsible for converting electrical energy into mechanical energy to drive the vehicle. Connecting the power battery 5 to the motor side can directly provide electrical energy to the motor to ensure that the motor can work efficiently and stably. Connecting the power battery 5 to the motor side can make full use of its power output characteristics and improve the overall performance of the system.

[0033] The power battery 5 can store and recycle braking energy to improve energy utilization. When the vehicle is decelerating or braking, the power battery 5 can absorb the energy generated by the motor reverse rotation and convert it into electrical energy for storage for subsequent driving.

[0034] As a backup power source, the power battery 5 can provide power support when a failure occurs in the main transmission system 1 or the auxiliary system 2, ensuring that the vehicle can continue to travel.

[0035] In some specific embodiments, electrical isolation is included between the main transmission system 1 and the auxiliary system 2. Electrical isolation can effectively separate the main transmission system 1 and the auxiliary system 2 to prevent electrical faults from propagating between the two systems. When a fault occurs in either the main transmission system 1 or the auxiliary system 2, electrical isolation can ensure that the fault does not affect the normal operation of the other system. This greatly reduces the risk of overall failure of the system due to electrical faults and improves the safety and reliability of the system. Specifically, electrical isolation can be achieved by an isolation transformer 4, an optoelectronic isolator, a capacitor, a magnetic material, or an isolation amplifier.

[0036] On the basis of the above embodiment, the topology structure further includes a redundant control system (not shown in the figure), which is in communication connection with the main transmission system 1. The redundant control system ensures that the system can continue to operate when the main component fails by adding a backup component. This design prevents the system from crashing when facing a single point failure, thereby greatly improving the reliability of the system. The backup components include a backup power supply, a backup network interface, and a backup controller.

[0037] In some specific embodiments, the redundant control system includes a primary controller and a backup controller.

[0038] On the basis of the above embodiments, a speed sensor and / or a position sensor is further provided on the main transmission system 1. The speed sensor can monitor the rotation speed of the main transmission system 1 in real time, and can quickly issue an alarm when the system is overspeeding, underspeeding or abnormally fluctuating, thereby avoiding potential mechanical failures or safety accidents. The position sensor can accurately measure the position of key components in the main transmission system 1, such as the crankshaft, camshaft, etc., thereby ensuring accurate operation and reliable control of the system.

[0039] In some specific embodiments, the auxiliary system 2 further includes a heat sink connected to the independent auxiliary winding 3. After the independent auxiliary winding 3 is connected to the heat sink, it can serve as an independent heat dissipation channel to quickly conduct the heat generated in the winding to the heat sink, and dissipate the heat into the air through the heat dissipation surface of the heat sink. This design effectively increases the heat dissipation area and improves the heat dissipation efficiency, thereby ensuring the temperature stability of the winding during operation and extending the service life of the winding.

[0040] Based on the above embodiment, the auxiliary system 2 includes at least one auxiliary load 6, and the auxiliary system 2 dynamically adjusts the output voltage and current according to the actual load conditions. Dynamic adjustment of the output voltage and current can ensure that the auxiliary system 2 always operates in the best working state. When the load is light, the system can reduce the output voltage and current to reduce unnecessary energy waste; when the load is heavy, the system can increase the output voltage and current to meet the load requirements. This flexible adjustment method significantly improves energy utilization efficiency and helps reduce operating costs.

[0041] By dynamically adjusting the output voltage and current, the auxiliary system 2 is better able to cope with the challenges brought by load changes. When the load suddenly increases or decreases, the system can respond quickly and adjust the output voltage and current to maintain stable operation of the system. This stability is critical to ensure the normal operation and long service life of the equipment.

[0042] The dynamic adjustment function helps optimize the performance of the device. For example, in some application scenarios, the device needs to maintain stable performance output under different load conditions. By dynamically adjusting the output voltage and current, it can ensure that the device can achieve the best performance under different loads, thereby improving the overall performance and reliability of the device.

[0043] After the implementation of the present invention, at least the following beneficial effects are achieved: (1) The main transmission system 1 adopts an independent axis control method, which can achieve precise control, improve the stability and reliability of the system, help reduce failures and errors caused by the complexity of the transmission system, and improve the operating efficiency of the overall system; (2) The transformer of the auxiliary system 2 is provided with an independent auxiliary winding 3, which can provide a stable power supply for the main transmission system 1. When the main power fails or fluctuates, the independent auxiliary winding 3 can respond quickly and provide backup power for the system to ensure the continuous operation of the system; (3) The independent auxiliary winding 3 can flexibly adjust the output of the power supply according to the actual needs of the main transmission system 1, thereby avoiding energy waste and loss and improving energy utilization efficiency; (4) The design of independent shaft control and independent auxiliary winding 3 makes each part of the system relatively independent, which is convenient for separate maintenance and overhaul, reduces the difficulty and cost of maintenance, and improves the maintainability and scalability of the system; (5) In the absence of the power battery 5, the main transmission system 1 adopts an independent shaft control method, which can adapt to different transmission requirements and load changes. At the same time, the independent auxiliary winding 3 can provide a stable power supply for the main transmission system 1 to ensure the normal operation of the system under various working conditions.

[0044] The above are exemplary embodiments disclosed in the present invention. The order disclosed in the above embodiments of the present invention is for description only and does not represent the advantages and disadvantages of the embodiments. However, it should be noted that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope disclosed in the embodiments of the present invention (including the claims) is limited to these examples. Various changes and modifications may be made without departing from the scope defined in the claims. The functions, steps and / or actions of the method claims according to the disclosed embodiments described herein do not need to be performed in any particular order. In addition, although the elements disclosed in the embodiments of the present invention may be described or required in individual form, they may also be understood as multiple unless explicitly limited to the singular.

[0045] A person skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples; under the concept of the embodiments of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the embodiments of the present invention as described above, which are not provided in detail for the sake of simplicity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. An independent axis control topology structure, including a main transmission system and an auxiliary system, characterized in that: When there is no power battery, the main transmission system adopts an independent shaft control method, and the transformer of the auxiliary system is provided with an independent auxiliary winding.

2. The topological structure of independent axis control according to claim 1 is characterized in that: The voltage of the independent auxiliary winding is a first value, and the auxiliary system includes a DC / AC inverter and an isolation transformer. After being inverted by the DC / AC inverter, the voltage of the independent auxiliary winding is transformed by the isolation transformer to a second value.

3. The topological structure of independent axis control according to claim 2, characterized in that: The first value is: DC1600V~DC2000V, and the second value is: AC360V~AC400V.

4. The topological structure of independent axis control according to claim 1 is characterized in that: When the power battery is installed, the power battery is connected to the motor side of the main transmission system and the auxiliary system.

5. The topological structure of independent axis control according to claim 1 is characterized in that: The main transmission system and the auxiliary system include electrical isolation.

6. The topological structure of independent axis control according to claim 1 is characterized in that: The topology also includes a redundant control system that is communicatively coupled to the main transmission system.

7. The topological structure of independent axis control according to claim 6 is characterized in that: The redundant control system includes a main controller and a backup controller.

8. The topological structure of independent axis control according to claim 1 is characterized in that: The main transmission system is also provided with a speed sensor and / or a position sensor.

9. The topological structure of independent axis control according to claim 1 is characterized in that: The auxiliary system further includes a heat sink connected to the independent auxiliary winding.

10. The topological structure of independent axis control according to claim 1, characterized in that: The auxiliary system includes at least one auxiliary load, and the auxiliary system dynamically adjusts output voltage and current according to actual load conditions.

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