Cascaded traction transformer with common mode reactor

Abstract

The present invention discloses a cascaded traction transformer with a common-mode reactor mode, and the present invention relates to the technical field of traction transformers. The cascaded traction transformer with a common-mode reactor mode comprises a clamp, an iron core and a fixing frame, wherein the clamp is sleeved with an iron core, an upper clamp is detachably mounted on the upper half of the iron core, and a lower clamp is detachably mounted on the lower half of the iron core, a high-voltage lead is connected to one side of the iron core, and a low-voltage lead is connected to the other side of the iron core, a mounting plate is slidably penetrated in the fixing frame, and a mounting assembly for simplifying the installation process is arranged on the fixing frame; while ensuring safe operation, it has high reliability and durability, can solve the problem of full-band, especially low-band transformers operating in reactor mode to achieve common-mode output, and is convenient for installing and removing the transformer, and there is no need to repeatedly tighten the screws each time during installation, and only the fixing rod needs to be inserted, which saves installation time.

Description

Technical Field

[0001] The present invention relates to the technical field of traction transformers, in particular to a cascade traction transformer with a common-mode reactor mode. Background Art

[0002] High-speed flying cars are cutting-edge technology that fills a global gap. There are no successful cases in the world. It requires the integration of multiple disciplines such as power electronics technology, high-voltage insulation technology, control technology, 5G communication technology, and vehicle engineering. Starting from a scaled-down prototype, breakthroughs are made step by step until the overall performance requirements are met. In order to ensure the smooth operation of the high-speed flying car system, power conversion and regulation equipment is required in the energy transmission system, ground support facilities or charging stations to ensure the effective utilization and management of energy. High-frequency use will cause power conversion and regulation equipment to easily fail and need to be replaced and repaired. The current power conversion and regulation equipment is usually a traction transformer. When installing a traction transformer, it is usually fixed with multiple bolts. Tools are needed to tighten or remove the bolts one by one, which is very troublesome during the installation and removal process. Therefore, a cascaded traction transformer with a common-mode inductor mode is proposed. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a cascaded traction transformer with a common-mode reactor mode, which solves the problem that the current traction transformer is usually fixed with multiple bolts during installation, and tools are needed to tighten or remove the bolts one by one, which is very troublesome during the installation and removal process.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a cascade traction transformer with a common mode reactor mode, comprising a clamp, an iron core and a fixing frame, the clamp is sleeved with an iron core, the upper half of the iron core is detachably mounted with an upper clamp, the lower half of the iron core is detachably mounted with a lower clamp, one side of the iron core is connected to a high voltage lead, the other side of the iron core is connected to a low voltage lead, the iron core is mounted on the top of the fixing frame through a reinforcing plate, a mounting plate is slidably penetrated in the fixing frame, an installation component for simplifying the installation process is provided on the fixing frame, and the installation component includes:

[0005] A fixing rod is slidably arranged in the fixing frame and the mounting plate and is used to fix the fixing frame on the mounting plate;

[0006] A positioning block is slidably arranged in the fixing rod to fix the position of the fixing rod;

[0007] The limiting rod is fixed on the side wall of the positioning block and is used to limit the moving direction of the positioning block.

[0008] Preferably, the installation assembly further includes:

[0009] Spring three is fixed at the bottom of the positioning block and is used for changing the position of the positioning block.

[0010] Preferably, the other end of the spring three is fixed in the fixing rod, one end of the limit rod is slidably inserted into the fixing rod, and a fan for heat dissipation is fixedly installed on the top of the fixing frame.

[0011] Preferably, a support plate is fixedly installed in the fixed frame, a support block is fixed on the top of the support plate, a spring 1 is fixedly installed in the support block, a sliding rod is fixedly installed on the other end of the spring 1, and one end of the sliding rod is slidably inserted into the support block and the support plate.

[0012] Preferably, a positioning rod is fixed at the bottom of the sliding rod, one end of the positioning rod is slidably inserted into the fixed rod, an arc-shaped groove is opened on the inner wall of the positioning rod, a guide rod is slidably installed in the arc-shaped groove, an arc-shaped block is fixedly inserted on the guide rod, and the arc-shaped block is slidably installed in the positioning rod.

[0013] Preferably, the top of the arc block is in sliding contact with the bottom of the fixing rod, a second spring is fixed to one end of the arc block, and the other end of the second spring is fixedly installed in the positioning rod.

[0014] Preferably, a sliding sleeve is fixed on the side wall of the fixing frame, a guide column is slidably inserted into the sliding sleeve, and a pressing plate is fixed at one end of the guide column.

[0015] Preferably, the bottom of the pressure plate is slidably matched with the top of the positioning block, a spring four is fixed to the bottom of the guide column, and the other end of the spring four is fixed in the sliding sleeve.

[0016] The present invention provides a cascaded traction transformer with a common-mode reactor mode. Compared with the prior art, it has the following beneficial effects:

[0017] (1) The cascaded traction transformer with common-mode reactor mode is provided with a clamp, an iron core, an upper clamp, a lower clamp, a high-voltage lead, a low-voltage lead, and a fan. The iron core is fixed by the upper clamp, the lower clamp and the clamp, and connected with the high-voltage lead and the low-voltage lead. When the alternating current in the three-phase power system passes through the primary winding, a changing magnetic field will be generated in the iron core. By adjusting the turns ratio of the winding, the voltage can be increased or decreased while keeping the power basically unchanged. Not only the voltage level is converted, but also the specific power supply requirements of the railway system are adapted to ensure that the power is efficiently and safely transmitted to the traction system of the train. At the same time, the fan is used for heat dissipation to ensure safe operation while having high reliability and durability. It can solve the problem of full-band, especially low-frequency band transformers running in reactor mode to achieve common-mode output, and can also solve the problem of voltage cascading and system insulation to the ground after the transformer is cascaded, and can solve the problem of local overheating of the transformer and skin effect and leakage magnetic field caused by the difference between the output waveform of the inverter and the traditional sine wave.

[0018] (2) The cascade traction transformer with common-mode reactor mode is provided with a fixing frame, a reinforcing plate, a mounting plate, a fixing rod, a supporting plate, a supporting block, a spring 1, a sliding rod, a positioning rod, an arc-shaped slide groove, a guide rod, an arc-shaped block, a spring 2, a spring 3, a positioning block, and a limiting rod. The fan and other parts are combined together through the reinforcing plate and the fixing frame, and the fan is mounted on the mounting plate through the fixing frame. After the fixing frame is engaged with the mounting plate, the fixing rod is passed through the fixing frame and the mounting plate in sequence. The positioning block and the fixing rod cooperate with each other, so that the fixing rod can combine the fixing frame with the mounting plate. At the same time, the fixing frame provides supporting force to the supporting plate, and the supporting plate provides supporting force to the supporting block, so that the positioning rod is inserted into the fixing rod to further fix the fixing rod to prevent the connection between the fixing frame and the mounting plate from loosening; when it needs to be removed, it is only necessary to move the arc block back into the positioning rod, and then move the positioning rod out of the fixing rod, press the positioning block back into the fixing rod, and then the fixing rod can be pulled out from the fixing frame and the mounting plate. At this time, the fixing frame can be removed from the mounting plate, which is convenient for installation and removal of the transformer. There is no need to repeatedly tighten the screws multiple times during each installation. It is only necessary to insert the fixing rod, which saves installation time.

[0019] (3) The cascade traction transformer with common-mode reactor mode is provided with a sliding sleeve, a guide column, a pressure plate, and a spring four. Only one hand is needed to move the pressure plate downward to press the positioning block on the same side into the fixed rod at the same time. Then the other hand is used to push the arc block back to the positioning rod and move the positioning rod out of the fixed rod. Finally, the fixed rod is pulled out. Then the pressure plate is released and the spring four provides an upward elastic force to the pressure plate, so that the pressure plate can be reset to the initial state, thereby completing the removal of the transformer more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a diagram of the combined state of the fixing frame of the present invention;

[0022] Figure 3 A diagram of the combined state of the installation components of the present invention;

[0023] Figure 4 This is a diagram of the exploded state of the support block of the present invention;

[0024] Figure 5 The figure is an exploded state diagram of the positioning rod of the present invention;

[0025] Figure 6 This is an exploded state diagram of the fixing pin of the present invention;

[0026] Figure 7 It is an exploded state diagram of the disassembled components of the present invention.

[0027] In the figure: 1. clamping plate; 11. iron core; 12. upper clamp; 13. lower clamp; 14. high-voltage lead; 15. low-voltage lead; 16. fan; 17. fixing frame; 171. reinforcement plate; 18. mounting plate; 2. fixing rod; 21. support plate; 22. support block; 23. spring one; 24. sliding rod; 25. positioning rod; 251. arc-shaped slide groove; 26. guide rod; 27. arc-shaped block; 28. spring two; 29. ​​spring three; 210. positioning block; 211. limit rod; 3. sliding sleeve; 31. guide column; 32. pressure plate; 33. spring four. DETAILED DESCRIPTION

[0028] 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 of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figures 1 to 7 , the present invention provides the following technical solutions:

[0030] Embodiment 1: A cascaded traction transformer with a common-mode reactor mode comprises a clamp 1, an iron core 11 and a fixing frame 17, wherein the iron core 11 is sleeved inside the clamp 1, an upper clamp 12 can be detachably installed on the upper half of the iron core 11, a lower clamp 13 can be detachably installed on the lower half of the iron core 11, a group of high-voltage leads 14 are connected to one side of the iron core 11, and a group of low-voltage leads 15 are connected to the other side of the iron core 11, the iron core 11 is fixedly installed on the top of the fixing frame 17 through a reinforcing plate 171, a mounting plate 18 is slidably inserted in the fixing frame 17, and a fan 16 for heat dissipation is fixedly installed on the top of the fixing frame 17.

[0031] When in use, the iron core 11 is fixed by the upper clamp 12, the lower clamp 13 and the clamping plate 1, and connected to the high-voltage lead 14 and the low-voltage lead 15. When the alternating current in the three-phase power system passes through the primary winding, a changing magnetic field will be generated in the iron core 11. According to Faraday's law of electromagnetic induction, this changing magnetic field will induce an electromotive force in the secondary winding, thereby generating current. The primary winding connected to the high-voltage lead 14 receives high-voltage power input, and through electromagnetic induction, the secondary winding connected to the low-voltage lead 15 outputs a voltage suitable for the traction motor. The transformation ratio K is defined as the ratio of the primary voltage to the secondary voltage K = U1 / U2 = N1 / N2, where N1 and N2 are the turns of the primary and secondary windings, respectively. By adjusting the turns ratio of the winding, the voltage can be increased or decreased.

[0032] Embodiment 2: The technical solution of this embodiment is different from that of Embodiment 1 in that: an installation component for simplifying the installation process is provided on the fixing frame 17, and the installation component includes:

[0033] One end of the fixing rod 2 is slidably inserted into the fixing frame 17 and the mounting plate 18 to fix the fixing frame 17 on the mounting plate 18;

[0034] One end of the positioning block 210 is slidably disposed in the fixing rod 2 to fix the position of the fixing rod 2;

[0035] One end of the limiting rod 211 is fixedly mounted on the side wall of the positioning block 210 to limit the moving direction of the positioning block 210;

[0036] One end of the spring three 29 is fixedly installed at the bottom of the positioning block 210 for changing the position of the positioning block 210, and the other end of the spring three 29 is fixedly installed on the inner wall of the fixed rod 2. One end of the limit rod 211 is slidably penetrated in the fixed rod 2. A support plate 21 is fixedly installed in the fixed frame 17, and a support block 22 is fixedly installed on the top of the support plate 21. A spring one 23 is fixedly installed in the support block 22, and a sliding rod 24 is fixedly installed at the other end of the spring one 23. One end of the sliding rod 24 is slidably penetrated in the support block 22 and the support plate 21, and the sliding A positioning rod 25 is fixedly installed at the bottom of the rod 24, and one end of the positioning rod 25 is slidably inserted into the fixed rod 2. Two arc-shaped sliding grooves 251 are symmetrically provided on the inner walls on both sides of the positioning rod 25. The two ends of the guide rod 26 are respectively slidably inserted into the two arc-shaped sliding grooves 251. An arc block 27 is fixedly inserted on the guide rod 26. The arc block 27 is slidably installed in the positioning rod 25. The top of the arc block 27 is slidably abutted against the bottom of the fixed rod 2. A spring 28 is fixedly installed at one end of the arc block 27, and the other end of the spring 28 is fixedly installed in the positioning rod 25.

[0037] When in use, the fan 16 and other parts are combined together through the reinforcing plate 171 and the fixing frame 17, and are installed on the mounting plate 18 through the fixing frame 17. After the fixing frame 17 is engaged with the mounting plate 18, the fixing rod 2 is passed through the fixing frame 17 and the mounting plate 18 in sequence, and finally passes through the other side of the fixing frame 17. At this time, the spring three 29 provides an upward elastic force to the positioning block 210, so that the positioning block 210 bounces upward, and the limiting rod 211 slides with the fixing rod 2. The limiting rod 211 guides and limits the positioning rod 25, so that the positioning block 210 only moves in a straight line during the movement. The positioning block 210 cooperates with the fixing rod 2, so that the fixing rod 2 can combine the fixing frame 17 with the mounting plate 18.

[0038] At the same time, the fixing frame 17 provides a supporting force to the support plate 21, the support plate 21 provides a supporting force to the support block 22, the support block 22 provides support to the spring 1 23, the support block 22, the support plate 21 and the sliding rod 24 are slidably matched, and after the fixing rod 2 is combined between the fixing frame 17 and the mounting plate 18, the spring 1 23 provides a downward elastic force to the sliding rod 24, and the sliding rod 24 drives the positioning rod 25 to move, so that the positioning rod 25 is inserted into the fixing rod 2 to further fix the fixing rod 2, thereby preventing the connection between the fixing frame 17 and the mounting plate 18 from becoming loose;

[0039] After one end of the positioning rod 25 passes through the fixing rod 2, the guiding rod 26 slides with the arc-shaped slide groove 251, and the guiding rod 26 guides and limits the arc-shaped block 27. The spring 28 provides elastic force to the arc-shaped block 27, so that the arc-shaped block 27 can pop out of the positioning rod 25 and fit with the bottom of the fixing rod 2, thereby preventing the positioning rod 25 inserted into the fixing rod 2 from moving upward out of the fixing rod 2, further fixing the fixing rod 2, and preventing the connection between the fixing frame 17 and the mounting plate 18 from loosening.

[0040] When removal is required, it is only necessary to move the arc block 27 back into the positioning rod 25, then move the positioning rod 25 out of the fixing rod 2, press the positioning block 210 back into the fixing rod 2, and then the fixing rod 2 can be pulled out from the fixing frame 17 and the mounting plate 18. At this time, the fixing frame 17 together with the transformer installed thereon can be removed from the mounting plate 18.

[0041] Embodiment 3, this embodiment is different from Embodiment 2 in that the technical solution includes: a sliding sleeve 3 is fixedly installed on the side wall of the fixed frame 17, a guide column 31 is slidably inserted in the sliding sleeve 3, a pressure plate 32 is fixedly installed at one end of the guide column 31, the bottom of the pressure plate 32 is slidably adapted to the top of the positioning block 210, a spring four 33 is fixedly installed at the bottom of the guide column 31, and the other end of the spring four 33 is fixedly installed in the sliding sleeve 3.

[0042] When in use, the guide column 31 drives the pressure plate 32 to move through the sliding cooperation between the sliding sleeve 3 and the guide column 31, so that when the fixing rod 2 needs to be removed, only one hand is needed to move the pressure plate 32 downward, and the two positioning blocks 210 on the same side can be pressed into the fixing rod 2 at the same time, and then the other hand pushes the arc block 27 back into the positioning rod 25 and moves the positioning rod 25 out of the fixing rod 2, and finally the fixing rod 2 is pulled out, and then the pressure plate 32 is released, and the spring four 33 provides an upward elastic force to the pressure plate 32, so that the pressure plate 32 can be reset to the initial state.

[0043] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cascaded traction transformer with a common mode reactor, comprising a clamping plate (1), an iron core (11) and a fixing frame (17), characterized in that: The clamping plate (1) is provided with an iron core (11) in a sleeve, an upper clamp (12) is detachably mounted on the upper half of the iron core (11), a lower clamp (13) is detachably mounted on the lower half of the iron core (11), a high-voltage lead (14) is connected to one side of the iron core (11), and a low-voltage lead (15) is connected to the other side of the iron core (11), the iron core (11) is mounted on the top of a fixing frame (17) via a reinforcing plate (171), a mounting plate (18) is slidably penetrated in the fixing frame (17), and a mounting assembly for simplifying the mounting process is provided on the fixing frame (17), the mounting assembly comprising: A fixing rod (2) is slidably inserted into the fixing frame (17) and the mounting plate (18) and is used to fix the fixing frame (17) on the mounting plate (18); A positioning block (210) is slidably inserted into the fixing rod (2) and is used to fix the position of the fixing rod (2); A limiting rod (211) is fixed on the side wall of the positioning block (210) and is used to limit the moving direction of the positioning block (210). The installation assembly also includes: A spring three (29) is fixed at the bottom of the positioning block (210) and is used to change the position of the positioning block (210). The other end of the spring three (29) is fixed in the fixing rod (2). One end of the limiting rod (211) is slidably inserted into the fixing rod (2). A fan (16) for heat dissipation is fixedly installed on the top of the fixing frame (17). A support plate (21) is fixedly installed in the fixing frame (17). A support block (22) is fixedly installed on the top of the support plate (21). A spring one (23) is fixedly installed in the support block (22). The other end of the spring one (23) is fixedly installed with a sliding rod (24). One end of the sliding rod (24) is slidably inserted into the support block (22). ) and the support plate (21), a positioning rod (25) is fixed at the bottom of the sliding rod (24), one end of the positioning rod (25) is slidably inserted into the fixed rod (2), an arc-shaped sliding groove (251) is opened on the inner wall of the positioning rod (25), a guide rod (26) is slidably installed in the arc-shaped sliding groove (251), an arc-shaped block (27) is fixedly inserted on the guide rod (26), the arc-shaped block (27) is slidably installed in the positioning rod (25), the top of the arc-shaped block (27) is slidably abutted against the bottom of the fixed rod (2), one end of the arc-shaped block (27) is fixed with a spring 2 (28), and the other end of the spring 2 (28) is fixedly installed in the positioning rod (25).

2. The cascaded traction transformer with common mode reactor mode according to claim 1, characterized in that: A sliding sleeve (3) is fixed on the side wall of the fixed frame (17), a guide column (31) is slidably inserted into the sliding sleeve (3), and a pressing plate (32) is fixed to one end of the guide column (31).

3. The cascaded traction transformer with common mode reactor mode according to claim 2, characterized in that: The bottom of the pressure plate (32) is slidably matched with the top of the positioning block (210), and a spring four (33) is fixed to the bottom of the guide column (31), and the other end of the spring four (33) is fixed in the sliding sleeve (3).

Images