CN114094798A - Traction converter of mining electric wheel dump truck - Google Patents

Traction converter of mining electric wheel dump truck Download PDF

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Publication number
CN114094798A
CN114094798A CN202111342585.1A CN202111342585A CN114094798A CN 114094798 A CN114094798 A CN 114094798A CN 202111342585 A CN202111342585 A CN 202111342585A CN 114094798 A CN114094798 A CN 114094798A
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China
Prior art keywords
module
reactor
cavity
pressure chamber
electric wheel
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Granted
Application number
CN202111342585.1A
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Chinese (zh)
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CN114094798B (en
Inventor
俞鹏程
黄启钊
郭宁平
艾伍轶
张文进
龚毅
刘辉荣
邱欣
黄彩波
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Zhuzhou National Engineering Research Center of Converters Co Ltd
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Zhuzhou National Engineering Research Center of Converters Co Ltd
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Priority to CN202111342585.1A priority Critical patent/CN114094798B/en
Publication of CN114094798A publication Critical patent/CN114094798A/en
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Publication of CN114094798B publication Critical patent/CN114094798B/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20945—Thermal management, e.g. inverter temperature control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Abstract

The invention discloses a traction converter of a mining electric wheel dumper, which comprises a rectifying module, an inversion chopping module, a reactor and an auxiliary inverter, wherein the rectifying module, the inversion chopping module and a main motor of the mining electric wheel dumper are sequentially connected, and the reactor, the auxiliary inverter and a cooling fan of the mining electric wheel dumper are sequentially connected. The invention has the advantages of keeping the better heat dissipation performance of the electric drive system, reducing the requirement on the rotating speed of the diesel engine and the like.

Description

Traction converter of mining electric wheel dump truck
Technical Field
The invention relates to the technical field of converters, in particular to a traction converter for a mining electric wheel dumper.
Background
Along with the continuous expansion of large-scale open-pit mines at home and abroad, the electric wheel mining car has remarkable effect, and under the condition of equal yield, the large-tonnage mining car can reduce the number of cars, improve the working efficiency and safety and obtain higher economic benefit. At present, about 40 percent of coal mines and 90 percent of iron mine mining transportation tasks are undertaken by large-scale electric wheel mining trucks in the world, and the large-scale electric wheel mining trucks are taken as the first-choice transportation tools in surface mines with annual mining quantity of more than 1000 ten thousand tons. The mining electric wheel dumper converter is better than the heart of a vehicle, mainly plays a role in controlling power output, and the use of the mining electric wheel dumper is directly influenced by the performance of the mining electric wheel dumper converter. Along with the more and more diversified geographical environment of surface mine field, the operation requirement to electronic round mining car is also higher and higher, and present mining electronic round tipper converter still has following not enough:
1) the mining electric wheel dumper converter is installed on a frame of the mining electric wheel dumper, the frame is high in height and small in space, so that the converter is required to have good maintainability, the maintenance of the converter on the frame is not fully considered in some existing mining electric wheel dumper converters, for example, operating personnel are easily stumbled and safety problems occur due to the fact that cables are arranged on the frame for passing in and out of some converters.
2) Generally, heating devices such as capacitors, IGBTs and resistors are installed in the converter cabinet, heating is serious, and the mining electric wheel dump truck is often applied to plateau areas with an altitude of 3000m or even more than 5500m and desert areas with extremely high temperature. The existing converter of the mining electric wheel dumper does not fully consider the high-altitude adaptability of the converter, and in a mining area with extremely severe environment, the converter generates heat seriously when being applied on site due to high environmental temperature, even devices fail, such as capacitor explosion and the like, so that the service life of elements is influenced.
3) The cooling fan of the electric drive system of the traditional mining electric wheel dumper is coaxially driven with the diesel engine, so that the diesel engine must always operate at a high rotating speed to keep good heat dissipation performance, and the operation is not economical. Meanwhile, the mining electric wheel dump truck adopts an electric braking mode for braking, one third of working conditions of the mining truck is a braking working condition, a large amount of braking energy is consumed on heating of a braking resistor, and the braking energy is not stored and reused, so that a large amount of braking energy loss is caused. And the large diesel engine configured for the off-highway vehicle has very high oil consumption, which can cause great emission of atmospheric pollutants.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a traction converter for a mining electric wheel dump truck, which reduces the requirement on the rotating speed of a diesel engine while maintaining the good heat dissipation performance of an electric drive system.
In order to solve the technical problems, the invention adopts the following technical scheme:
the traction converter further comprises a reactor and an auxiliary inverter, and the reactor, the auxiliary inverter and a cooling fan of the mining electric wheel dumper are sequentially connected.
As a further improvement of the above technical solution: the mining electric wheel dump truck is provided with a storage battery, and the rectifying module, the DC-DC module, the reactor and the storage battery are sequentially connected.
As a further improvement of the above technical solution: the rectifier module comprises a first rectifier module and a second rectifier module, the inversion chopping module comprises a first inversion chopping module connected with the first rectifier module and a second inversion chopping module connected with the second rectifier module, and the reactor comprises a first reactor and a second reactor.
As a further improvement of the above technical solution: the intelligent cabinet is characterized by further comprising a cabinet body, wherein the first rectifying module, the second rectifying module, the first reactor and the second reactor are installed on the rear side of the inner cavity of the cabinet body, and the first inversion chopping module, the second inversion chopping module, the auxiliary inverter and the DC-DC module are installed on the front side of the inner cavity of the cabinet body.
As a further improvement of the above technical solution: first contravariant chopping module and second contravariant chopping module are located the downside, the DC-DC module is located first contravariant chopping module top, supplementary DC-to-ac converter is located second contravariant chopping module top, first reactor and second reactor are located the downside, first rectifier module and second rectifier module are located the upside, cabinet body rear side is connected with first terminal box, first terminal box slant is qualified for the next round of competitions and internally mounted has inlet wire subassembly and outlet wire subassembly, the cabinet body is close to one side of DC-DC module is connected with the second terminal box, second terminal box is qualified for the next round of competitions and internally mounted has chopping wiring subassembly, battery wiring subassembly and auxiliary power source wiring subassembly downwards.
As a further improvement of the above technical solution: the cabinet body is close to one side of supplementary dc-to-ac converter is equipped with first low-voltage chamber, first low-voltage chamber rear is equipped with the second low-voltage chamber, install the control unit in the first low-voltage chamber and set first cabinet door, install the electric board subassembly in the second low-voltage chamber and set the second cabinet door, first low-voltage chamber and second low-voltage chamber pass through metal baffle and cabinet internal chamber and keep apart.
As a further improvement of the above technical solution: and a first wiring operation maintenance cavity is arranged below the second junction box, and a second wiring operation maintenance cavity is arranged below the second low-voltage cavity.
As a further improvement of the above technical solution: the internal preceding high-pressure chamber and the back high-pressure chamber of being equipped with of cabinet, first contravariant chopper module, second contravariant chopper module, auxiliary inverter and DC-DC module are located preceding high-pressure chamber, first rectifier module and second rectifier module are located back high-pressure chamber, be equipped with first internal circulation fan between preceding high-pressure chamber and the back high-pressure chamber, first wiring operation maintenance chamber and second wiring operation maintenance chamber all with preceding high-pressure chamber intercommunication, first wiring operation maintenance chamber and second wiring operation maintenance chamber respectively through return current channel with back high-pressure chamber intercommunication.
As a further improvement of the above technical solution: and a second internal circulation fan is arranged between the upper part of the first low-pressure cavity and the upper part of the front high-pressure cavity, and the lower part of the front high-pressure cavity is communicated with the lower part of the first low-pressure cavity through a return passage.
As a further improvement of the above technical solution: the front high voltage cavity comprises a first front high voltage cavity and a second front high voltage cavity, the first inverter chopper module and the DC-DC module are located in the first front high voltage cavity, the second inverter chopper module and the auxiliary inverter are positioned in the second front high-voltage cavity, an air duct converging cavity is arranged below the rear high-voltage cavity, the first reactor and the second reactor are positioned in the air duct converging cavity, the top of the cabinet body is provided with a first air inlet, a second air inlet and a third air inlet and is provided with a protective filter cover, the first air inlet, the rear high-pressure cavity and the air duct converging cavity are communicated in sequence to form a first air cooling channel, the second air inlet, the first front high-pressure cavity and the air channel converging cavity are communicated in sequence to form a second air cooling channel, and the third air inlet, the second front high-pressure cavity and the air channel converging cavity are sequentially communicated to form a third air cooling channel, and the air channel converging cavity is provided with an air outlet and is communicated with the air inlet of the cooling fan.
As a further improvement of the above technical solution: the top of the cabinet body is also provided with an air supplementing opening, and an air supplementing channel is arranged between the air supplementing opening and the air channel converging cavity.
As a further improvement of the above technical solution: the cabinet body includes many installation roof beams, many installation roof beam welded connection, first rectifier module, second rectifier module, first reactor, second reactor, first contravariant chopping module, second contravariant chopping module, auxiliary inverter and DC-DC module pass through the fastener install in on the installation roof beam.
Compared with the prior art, the invention has the advantages that: the traditional traction converter of the mining electric wheel dump truck generates three-phase alternating current by being connected with a generator, the three-phase alternating current is rectified into direct current by a rectifying module, two main inverter modules drive two main motors to realize the traveling function of the dump truck, and a cooling fan is generally a direct current fan coaxial with a diesel engine, so that the diesel engine is required to be kept at a high rotating speed all the time, and the high rotating speed of the diesel engine is required even when the electric wheel dump truck brakes downhill. The traction converter for the mining electric wheel dumper not only realizes the conventional walking function, but also drives the cooling fan of the electric drive system through the reactor and the auxiliary inverter, intelligently controls the rotating speed of the cooling fan according to the heat dissipation requirements of various working conditions, keeps the good heat dissipation performance of the electric drive system, and does not need to additionally improve the rotating speed of a diesel engine and the performance of the diesel engine.
Drawings
Fig. 1 is a schematic diagram of an axle measuring structure at the front side of a traction converter of the mining electric wheel dump truck.
Fig. 2 is a schematic diagram of an axle measuring structure at the rear side of the traction converter of the mining electric wheel dump truck.
Fig. 3 is a schematic view of the front side of the inside of the cabinet of the present invention.
Fig. 4 is a schematic structural diagram of the right side in the cabinet of the invention.
Fig. 5 is a schematic view of the left side structure inside the cabinet of the present invention.
Fig. 6 is a schematic view of the rear side inside the cabinet of the present invention.
Fig. 7 is a schematic top view of the first junction box of the present invention.
Fig. 8 is a schematic top view of the air-cooled duct of the present invention.
Fig. 9 is a schematic diagram of the traction converter of the mining electric wheel dump truck.
FIG. 10 is a schematic diagram of the principle of the air-cooled channel of the present invention.
Fig. 11 is a schematic perspective view of an air-cooled duct according to the present invention.
The reference numerals in the figures denote: 10. a main transmission motor; 20. a cooling fan; 30. a storage battery; 40. a generator; 50. an external cooling member; 1. a rectification module; 11. a first rectifying module; 12. a second rectification module; 2. an inverting chopper module; 21. a first inverting chopper module; 22. a second inverting chopper module; 3. a reactor; 31. a first reactor; 32. a second reactor; 41. an auxiliary inverter; 42. a DC-DC module; 5. a cabinet body; 51. a first routing operation maintenance cavity; 52. a second routing operation maintenance cavity; 53. a rear high pressure chamber; 54. a first internal circulation fan; 55. a second internal circulation fan; 56. a first front high pressure chamber; 57. a second front high pressure chamber; 58. an air duct converging cavity; 59. mounting a beam; 61. a first junction box; 62. a wire inlet assembly; 63. a second junction box; 64. a chopping wiring assembly; 65. a battery wiring assembly; 66. an auxiliary power supply wiring assembly; 67. a wire outlet assembly; 71. a first low pressure chamber; 72. a second low pressure chamber; 73. a control unit; 74. a first cabinet door; 75. an electrical board assembly; 76. a second cabinet door; 81. a first air inlet; 82. a second air inlet; 83. a third air inlet; 84. a protective filter cover; 85. a first air-cooled channel; 86. a second air-cooled channel; 87. a third air-cooled channel; 88. an air outlet; 89. and (7) air supplementing openings.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples of the specification.
Fig. 1 to 11 show an embodiment of the traction converter for the mining electric wheel dump truck according to the invention, the traction converter for the mining electric wheel dump truck of the embodiment includes a rectifier module 1 and an inverter chopper module 2, the rectifier module 1, the inverter chopper module 2 and a main transmission motor 10 of the mining electric wheel dump truck are sequentially connected, the traction converter further includes a reactor 3 and an auxiliary inverter 41, and the reactor 3, the auxiliary inverter 41 and a cooling fan 20 of the mining electric wheel dump truck are sequentially connected.
According to the traditional traction converter of the mining electric wheel dump truck, a generator 40 is connected to generate three-phase alternating current, the three-phase alternating current is rectified into direct current through a rectifying module 1, two main inverter modules drive two main motors 10 to realize the traveling function of the dump truck, and a cooling fan 20 is generally a direct current fan coaxial with a diesel engine, so that the diesel engine is required to be kept at a high rotating speed all the time, and the high rotating speed of the diesel engine is required even when braking is carried out on a downhill. The traction converter for the mining electric wheel dumper not only realizes the conventional walking function, but also drives the cooling fan 20 of the electric drive system through the reactor 3 and the auxiliary inverter 41, intelligently controls the rotating speed of the cooling fan 20 according to the heat dissipation requirements of various working conditions, keeps the good heat dissipation performance of the electric drive system, and does not need to additionally improve the rotating speed of a diesel engine and the performance of the diesel engine.
Further, in this embodiment, the traction converter of the mining electric wheel dump truck further includes a DC-DC module 42, the mining electric wheel dump truck is equipped with a storage battery 30, and the rectifier module 1, the DC-DC module 42, the reactor 3, and the storage battery 30 are connected in sequence. The storage battery 30 is connected through the DC-DC module 42, braking energy can be recovered and stored during electric braking, energy can be provided during traction, energy consumption and pollutant emission are reduced, and economic benefit and social benefit are improved
As a preferred embodiment, the rectification module 1 includes a first rectification module 11 and a second rectification module 12, the inverter chopping module 2 includes a first inverter chopping module 21 connected to the first rectification module 11 and a second inverter chopping module 22 connected to the second rectification module 12, and the reactor 3 includes a first reactor 31 and a second reactor 32. Of course, in other embodiments, when the generator 40 of the mining electric wheel dump truck is a single winding, only one rectifier module 1 may be provided.
Further, in this embodiment, the traction converter of the mining electric wheel dump truck further includes a cabinet 5, the first rectifying module 11, the second rectifying module 12, the first reactor 31 and the second reactor 32 are installed at the rear side of the inner cavity of the cabinet 5, and the first inverter chopper module 21, the second inverter chopper module 22, the auxiliary inverter 41 and the DC-DC module 42 are installed at the front side of the inner cavity of the cabinet 5. The inverter chopper module 2, the DC-DC module 42 and the auxiliary inverter 41 are all provided with a PCB (printed circuit board, the same applies below), and are installed on the front side of the inner cavity of the cabinet 5 in need of frequent maintenance; the rectifier module 1 and the reactor 3 are not provided with a PCB circuit board, and are not frequently maintained and installed on the rear side of the inner cavity of the cabinet body 5, so that the maintainability of the converter is good.
Furthermore, in the present embodiment, the first inverter chopper module 21 and the second inverter chopper module 22 are located on the lower side (see fig. 3, the first inverter chopper module 21 is located on the left side, the second inverter chopper module 22 is located on the right side), the DC-DC module 42 is located above the first inverter chopper module 21, the auxiliary inverter 41 is located above the second inverter chopper module 22, the first reactor 31 and the second reactor 32 are located on the lower side, the first rectifier module 11 and the second rectifier module 12 are located on the upper side, the first junction box 61 is connected to the rear side of the cabinet 5, the first junction box 61 is obliquely led out downwards and internally provided with an incoming line assembly 62 and an outgoing line assembly 67, the second junction box 63 is connected to one side of the cabinet 5 close to the DC-DC module 42, the second junction box 63 is led out downwards and internally provided with a chopper assembly 64, a battery wiring assembly 65 and an auxiliary power supply wiring assembly 66. The whole converter realizes modular construction and is convenient to produce and assemble. Through the mode of cavity-dividing layout, the front side of the device or the passageway of the cab which is frequently maintained is maintained, and the maintenance requirement in a narrow range is met. Power incoming and outgoing cables which need to be connected to the bottom of the vehicle are centralized on the back of the cabinet body 5 and obliquely lead out downwards; the braking cable and the battery cable which are required to be connected with the battery on the left side of the converter and the braking resistor are centralized on the left side of the cabinet body 5 and lead out downwards, so that the wiring of the whole vehicle is facilitated, and the winding of a large cable on a frame of the mining electric wheel dumper is avoided.
Furthermore, in the present embodiment, a first low-pressure chamber 71 is disposed on one side of the cabinet 5 close to the auxiliary inverter 41, a second low-pressure chamber 72 is disposed behind the first low-pressure chamber 71 (see fig. 3, the first low-pressure chamber 71 and the second low-pressure chamber 72 are located on the right side of the cabinet 5), a control unit 73 is installed in the first low-pressure chamber 71 and is provided with a first cabinet door 74, an electrical board assembly 75 is installed in the second low-pressure chamber 72 and is provided with a second cabinet door 76, and the first low-pressure chamber 71 and the second low-pressure chamber 72 are isolated from the inner cavity of the cabinet 5 by a metal partition plate (not shown in the figure). Most of the weak current control devices are arranged on the electric board assembly 75, so that the mounting, dismounting and wiring of the devices are facilitated; the first low-pressure cavity 71 and the second low-pressure cavity 72 are isolated from the inner cavity of the cabinet body 5 through metal partition plates and are respectively provided with a first cabinet door 74 and a second cabinet door 76 which are independent, so that effective isolation of strong current and weak current can be realized, and heat generated by power devices (the rectifier module 1, the inverter chopper module 2 and the like) in the inner cavity of the cabinet body 5 is simultaneously isolated and conducted to the control unit 73 and the electric board assembly 75. Preferably, the control unit 73 is connected with the power device by an optical fiber, and a wire passing hole is left at a position corresponding to the metal partition plate.
A first wiring operation maintenance cavity 51 is arranged below the second junction box 63, preferably, the chopping wave wiring assembly 64, the battery wiring assembly 65 and the auxiliary power supply wiring assembly 66 are arranged from back to front at one time, and the first wiring operation maintenance cavity 51 is positioned below the chopping wave wiring assembly 64; the second wiring operation maintenance cavity 52 is arranged below the second low-voltage cavity 72, the structure is reasonable, and the wiring operation maintenance is convenient.
Further, in the present embodiment, a front high-voltage chamber and a rear high-voltage chamber 53 are arranged in the cabinet body 5, the first inverter chopper module 21, the second inverter chopper module 22, the auxiliary inverter 41, and the DC-DC module 42 are located in the front high-voltage chamber, the first rectifier module 11 and the second rectifier module 12 are located in the rear high-voltage chamber 53, a first internal circulation fan 54 is arranged between the front high-voltage chamber and the rear high-voltage chamber 53, the first wiring operation maintenance chamber 51 and the second wiring operation maintenance chamber 52 are both communicated with the front high-voltage chamber, and the first wiring operation maintenance chamber 51 and the second wiring operation maintenance chamber 52 are respectively communicated with the rear high-voltage chamber 53 through a backflow channel (not shown in the figure). During operation, first internal circulation fan 54 starts, and cooling air blows to the preceding high-pressure chamber from back high-pressure chamber 53, then gets into first wiring operation maintenance chamber 51 and second wiring operation maintenance chamber 52, flows back to back high-pressure chamber 53 at last, forms the circulation route in the cabinet body 5 and dispels the heat to the high-pressure chamber, prevents effectively that the internal local heat of cabinet 5 from gathering, guarantees the internal heat dispersion of cabinet.
Further, in the present embodiment, a second internal circulation fan 55 is disposed between the upper portion of the first low pressure chamber 71 and the upper portion of the front high pressure chamber, and the lower portion of the front high pressure chamber is communicated with the lower portion of the first low pressure chamber 71 through a return passage (not shown). During operation, second internal circulation fan 55 starts, and cooling air blows to preceding high-pressure chamber upper portion from first low-pressure chamber 71 upper portion, flows back to first low-pressure chamber 71 lower part from preceding high-pressure chamber lower part again, forms another cabinet body 5 internal circulation route and dispels the heat to the low-pressure chamber, prevents effectively that the internal local heat of cabinet 5 from accumulating, guarantees heat dispersion in the cabinet.
Further, in the present embodiment, the front high-pressure chamber includes a first front high-pressure chamber 56 and a second front high-pressure chamber 57, the first inverter chopper module 21 and the DC-DC module 42 are located in the first front high-pressure chamber 56, the second inverter chopper module 22 and the auxiliary inverter 41 are located in the second front high-pressure chamber 57, an air duct converging chamber 58 is provided below the rear high-pressure chamber 53, the first reactor 31 and the second reactor 32 are located in the air duct converging chamber 58, the top of the cabinet body 5 is provided with a first air inlet 81, a second air inlet 82 and a third air inlet 83, and is provided with a protective filter cover 84, the first air inlet 81, the rear high-pressure chamber 53 and the air duct converging chamber 58 are sequentially communicated to form a first air-cooling passage 85, the second air inlet 82, the first front high-pressure chamber 56 and the air duct converging chamber 58 are sequentially communicated to form a second air-cooling passage 86, the third air inlet 83, the second front high-pressure chamber 57 and the air duct converging chamber 58 are sequentially communicated to form a third air-cooling passage 87, the air duct converging cavity 58 is provided with an air outlet 88 and is communicated with an air inlet of the cooling fan 20. In the structure, the DC-DC module 42 and the auxiliary inverter 41 have small heating power and are arranged at the upstream of the second air-cooled channel 86 and the third air-cooled channel 87 in a temperature sensitive manner; the inversion chopping module 2 is high in heating power and sensitive to temperature, and the first inversion chopping module 21 and the second inversion chopping module 22 are separately arranged in the midstream of the second air-cooled channel 86 and the third air-cooled channel 87; the reactor 3 has high heating power and insensitive temperature and is arranged in the air duct converging cavity 58; the rectifier module 1 is arranged in the first air-cooled channel 85 in consideration of heat dissipation and maintainability, and is matched with the two internal circulation heat dissipation paths, so that all power modules can obtain good heat dissipation. Referring to fig. 10, in operation, under the action of the cooling fan 20, after the external cooling air is filtered and purified by the protective filter cover 84, the external cooling air enters the inside of the cabinet 5 through the first air inlet 81, the second air inlet 82 and the third air inlet 83, respectively, and then converges to the air duct converging cavity 58 through the first air-cooling channel 85, the second air-cooling channel 86 and the third air-cooling channel 87, and then is exhausted through the air outlet 88, takes away the heat in the cabinet 5, and finally is conveyed to the external cooling component 50 under the driving of the cooling fan 20. Preferably, adjusting components can be disposed at the first air inlet 81, the second air inlet 82 and the third air inlet 83 to adjust the air inlet area to meet different heat dissipation requirements.
Furthermore, in this embodiment, an air supply opening 89 is further disposed at the top of the cabinet 5, and an air supply passage (not shown) is disposed between the air supply opening 89 and the air duct converging cavity 58. Because the parameters such as the heat dissipation air quantity, the pressure loss and the like of the external cooling part of each vehicle type are different, the air supplementing channel is arranged, the system resistance of the air cooling channel can be adjusted according to the heat dissipation condition of the whole vehicle, and the applicability of the converter is improved.
In a preferred embodiment, the cabinet 5 includes a plurality of mounting beams 59, the mounting beams 59 are welded to form a framework of the cabinet 5, and the cabinet doors are mounted on the framework, so as to form a relatively closed cabinet space, and the first rectifier module 11, the second rectifier module 12, the first reactor 31, the second reactor 32, the first inverter chopper module 21, the second inverter chopper module 22, the auxiliary inverter 41, and the DC-DC module 42 are mounted on the mounting beams 59 by fasteners (e.g., bolts, screws, etc.). The converter cabinet body 5 is formed by welding the mounting beam 59, all the modular units are directly mounted on the mounting beam 59, the structural strength is high, and the converter can be suitable for severe vibration environments on the mining electric wheel dumper.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims (12)

1. The utility model provides a mining electronic round of tipper traction converter, includes rectifier module (1) and contravariant chopper module (2), rectifier module (1) contravariant chopper module (2) and mining electronic round of tipper's main driving motor (10) connect gradually its characterized in that: the traction converter further comprises a reactor (3) and an auxiliary inverter (41), wherein the reactor (3), the auxiliary inverter (41) and a cooling fan (20) of the mining electric wheel dumper are sequentially connected.
2. The traction converter for the mining electric wheel dump truck according to claim 1, characterized in that: the mining electric wheel dump truck is provided with a storage battery (30), and the rectifier module (1), the DC-DC module (42), the reactor (3) and the storage battery (30) are connected in sequence.
3. The traction converter for the mining electric wheel dump truck according to claim 2, characterized in that: the rectifier module (1) comprises a first rectifier module (11) and a second rectifier module (12), the inversion chopping module (2) comprises a first inversion chopping module (21) connected with the first rectifier module (11) and a second inversion chopping module (22) connected with the second rectifier module (12), and the reactor (3) comprises a first reactor (31) and a second reactor (32).
4. The traction converter for the mining electric wheel dump truck according to claim 3, characterized in that: the intelligent power supply cabinet is characterized by further comprising a cabinet body (5), wherein the first rectifying module (11), the second rectifying module (12), the first reactor (31) and the second reactor (32) are installed on the rear side of the inner cavity of the cabinet body (5), and the first inversion chopping module (21), the second inversion chopping module (22), the auxiliary inverter (41) and the DC-DC module (42) are installed on the front side of the inner cavity of the cabinet body (5).
5. The traction converter for the mining electric wheel dump truck according to claim 4, characterized in that: first contravariant chopping module (21) and second contravariant chopping module (22) are located the downside, DC-DC module (42) are located first contravariant chopping module (21) top, supplementary inverter (41) are located second contravariant chopping module (22) top, first reactor (31) and second reactor (32) are located the downside, first rectifier module (11) and second rectifier module (12) are located the upside, the cabinet body (5) rear side is connected with first terminal box (61), first terminal box (61) slant is qualified for the next round of competitions and internally mounted has inlet wire subassembly (62) and subassembly (67) of being qualified for the next round of competitions, the cabinet body (5) are close to one side of DC-DC module (42) is connected with second terminal box (63), second terminal box (63) are qualified for the next round of competitions downwards and internally mounted have chopping wiring subassembly (64), A battery wiring assembly (65) and an auxiliary power supply wiring assembly (66).
6. The traction converter for the mining electric wheel dump truck according to claim 5, characterized in that: the utility model discloses a cabinet body (5) is close to one side of supplementary inverter (41) is equipped with first low-pressure chamber (71), first low-pressure chamber (71) rear is equipped with second low-pressure chamber (72), install control unit (73) and set first cabinet door (74) in first low-pressure chamber (71), install electric plate subassembly (75) and set second cabinet door (76) in second low-pressure chamber (72), first low-pressure chamber (71) and second low-pressure chamber (72) are kept apart through metal baffle and cabinet body (5) inner chamber.
7. The traction converter for the mining electric wheel dump truck according to claim 6, characterized in that: a first wiring operation maintenance cavity (51) is arranged below the second junction box (63), and a second wiring operation maintenance cavity (52) is arranged below the second low-voltage cavity (72).
8. The traction converter for the mining electric wheel dump truck according to claim 6, characterized in that: be equipped with preceding high-pressure chamber and back high-pressure chamber (53) in the cabinet body (5), first contravariant chopper module (21), second contravariant chopper module (22), auxiliary inverter (41) and DC-DC module (42) are located preceding high-pressure intracavity, first rectifier module (11) and second rectifier module (12) are located back high-pressure chamber (53), be equipped with first inner loop fan (54) between preceding high-pressure chamber and back high-pressure chamber (53), first wiring operation maintenance chamber (51) and second wiring operation maintenance chamber (52) all with preceding high-pressure chamber intercommunication, first wiring operation maintenance chamber (51) and second wiring operation maintenance chamber (52) respectively through return flow channel with back high-pressure chamber (53) intercommunication.
9. The traction converter for the mining electric wheel dump truck according to claim 8, characterized in that: and a second internal circulation fan (55) is arranged between the upper part of the first low-pressure cavity (71) and the upper part of the front high-pressure cavity, and the lower part of the front high-pressure cavity is communicated with the lower part of the first low-pressure cavity (71) through a return passage.
10. The traction converter for the mining electric wheel dump truck according to claim 8, characterized in that: the front high-pressure cavity comprises a first front high-pressure cavity (56) and a second front high-pressure cavity (57), the first inverter chopper module (21) and the DC-DC module (42) are located in the first front high-pressure cavity (56), the second inverter chopper module (22) and the auxiliary inverter (41) are located in the second front high-pressure cavity (57), an air duct converging cavity (58) is arranged below the rear high-pressure cavity (53), the first reactor (31) and the second reactor (32) are located in the air duct converging cavity (58), a first air inlet (81), a second air inlet (82) and a third air inlet (83) are formed in the top of the cabinet body (5) and provided with a protective filter cover (84), the first air inlet (81), the rear high-pressure cavity (53) and the air duct converging cavity (58) are sequentially communicated to form a first air cooling channel (85), and the second air inlet (82), High-pressure chamber (56) and wind channel converge chamber (58) and communicate formation second air-cooled passageway (86) in proper order before first, high-pressure chamber (57) and wind channel converge chamber (58) and communicate formation third air-cooled passageway (87) in proper order before third air inlet (83), the wind channel converges chamber (58) and is equipped with air outlet (88) and with the air intake intercommunication of cooling blower (20).
11. The traction converter for the mining electric wheel dump truck according to claim 10, characterized in that: the top of the cabinet body (5) is also provided with an air supplementing opening (89), and an air supplementing channel is arranged between the air supplementing opening (89) and the air channel converging cavity (58).
12. The traction converter for the mining electric-wheel dump truck according to any one of claims 4 to 11, characterized in that: the cabinet body (5) comprises a plurality of mounting beams (59), the mounting beams (59) are connected in a welding mode, and the first rectifying module (11), the second rectifying module (12), the first reactor (31), the second reactor (32), the first inversion chopping module (21), the second inversion chopping module (22), the auxiliary inverter (41) and the DC-DC module (42) are mounted on the mounting beams (59) through fasteners.
CN202111342585.1A 2021-11-12 2021-11-12 Traction converter of mining electric wheel dumper Active CN114094798B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203233317U (en) * 2013-05-22 2013-10-09 株洲南车时代电气股份有限公司 Traction converter for diesel locomotive
CN106208722A (en) * 2016-08-15 2016-12-07 株洲中车时代电气股份有限公司 A kind of mine electric wheel dump current transformer
CN206060551U (en) * 2016-05-30 2017-03-29 株洲中车时代电气股份有限公司 A kind of traction convertor
CN207234652U (en) * 2017-09-28 2018-04-13 株洲中车时代电气股份有限公司 A kind of integrated form traction convertor
CN108032734A (en) * 2017-12-14 2018-05-15 株洲联诚集团控股股份有限公司 A kind of auxiliary power supply circuit, dumper power supply circuit and its control method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203233317U (en) * 2013-05-22 2013-10-09 株洲南车时代电气股份有限公司 Traction converter for diesel locomotive
CN206060551U (en) * 2016-05-30 2017-03-29 株洲中车时代电气股份有限公司 A kind of traction convertor
CN106208722A (en) * 2016-08-15 2016-12-07 株洲中车时代电气股份有限公司 A kind of mine electric wheel dump current transformer
CN207234652U (en) * 2017-09-28 2018-04-13 株洲中车时代电气股份有限公司 A kind of integrated form traction convertor
CN108032734A (en) * 2017-12-14 2018-05-15 株洲联诚集团控股股份有限公司 A kind of auxiliary power supply circuit, dumper power supply circuit and its control method

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