High-heat-dissipation rectification unit module and converter

Abstract

The invention discloses a high-heat-dissipation rectification unit module and a converter. According to the high-heat-dissipation rectification unit module, the input ends of two groups of three-phase bridge type rectification circuit modules are connected in parallel through an input copper bar assembly, and the output ends of the two groups of three-phase bridge type rectification circuit modules are respectively connected with an output copper bar assembly; the temperature sensor is arranged between the two groups of three-phase bridge rectifier circuit modules; the current detection module is arranged on the front side of the input copper bar assembly; the output current detection module is arranged on the rear side of the output copper bar assembly; the radiating fins are arranged below the radiator, and the fan is arranged perpendicular to the ventilation direction of the radiating fins. The two groups of three-phase bridge rectifier circuit modules are adopted to improve the total power of the unit, reduce the total manufacturing cost of the unit, reduce the heat dissipation requirement in unit area, and cooperate with the air-cooled heat dissipation fins with strong heat dissipation capability to realize high heat dissipation performance of the whole unit module, improve the environmental adaptability of the high heat dissipation rectifier unit module, and improve the service life of the high heat dissipation rectifier unit module. The device is more suitable for severe working conditions of engineering machinery.

Description

Technical Field

[0001] The present invention relates to the field of rectifier devices, and in particular to a high heat dissipation rectifier unit module and a converter. Background Art

[0002] The rectifier unit is one of the key components of the traction drive system of ultra-high power electric drive engineering machinery. The traction drive system of ultra-high power electric drive engineering machinery usually has two or even four traction converter units, which places high demands on the power and performance of the rectifier unit. In addition, the operating conditions of engineering machinery are harsh, which is a severe test for the heat dissipation performance of the components carried on it.

[0003] At present, the rectifier unit usually adopts a set of three-phase bridge rectifier circuits, which has extremely high requirements on the power and performance of a single device, and the heat dissipation demand per unit area is extremely large, which is not conducive to the cost control of the entire system and the improvement of the stability and reliability of the vehicle. In addition, most rectifier units are not formed into modules. The components in the unit are separated on different installation panels in the electric control cabinet, and the functional areas are not concentrated. During assembly, all components of the rectifier device need to be installed in the cabinet, which has a high production cost. In addition, it is impossible to quickly replace the entire module, which increases the complexity of debugging and maintenance and affects the improvement of work efficiency. Summary of the invention

[0004] Purpose of the invention: The present invention aims to provide a rectifier unit module with high heat dissipation, modularity and easy maintenance; another purpose of the present invention is to provide a converter using the above rectifier unit module.

[0005] Technical solution: The high heat dissipation rectifier unit module described in the present invention includes a radiator, heat dissipation fins, a three-phase bridge rectifier circuit module, an input copper busbar assembly, an output copper busbar assembly, a temperature sensor, an input current detection module and an output current detection module; the input ends of two groups of three-phase bridge rectifier circuit modules are connected in parallel through the input copper busbar assembly, and the output ends are respectively connected to the output copper busbar assemblies; the temperature sensor is arranged between the two groups of three-phase bridge rectifier circuit modules to monitor the maximum temperature of the radiator; the current detection module is arranged on the front side of the input copper busbar assembly to monitor the total current of the high heat dissipation rectifier unit module; the output current detection module is arranged on the rear side of the output copper busbar assembly to respectively monitor the output current of each group of three-phase bridge rectifier circuit modules; the heat dissipation fins are arranged below the radiator, and the fan is arranged perpendicular to the ventilation direction of the heat dissipation fins.

[0006] Preferably, a support beam assembly with a handle is provided on the edge of the radiator.

[0007] Preferably, the high heat dissipation rectifier unit module also includes an input copper bar support insulating plate and an output copper bar support insulating plate, which are installed on the support beam assembly to support the input copper bar assembly or the output copper bar assembly.

[0008] Preferably, the high heat dissipation rectifier unit module also includes an upper mounting plate installed on the upper part of the radiator, on which a voltage detection module, a filter capacitor, and a secondary line connector assembly are provided, and the secondary line connector assembly is provided with a quick-plug connector.

[0009] Preferably, the upper mounting plate is detachably mounted on the radiator via a split bracket.

[0010] Preferably, the support beam assembly is arranged on the radiator via a slider.

[0011] Preferably, the filter capacitor is fixed to the upper mounting plate by a reinforcing bracket to enhance stability under harsh working conditions.

[0012] Preferably, the high heat dissipation rectifier unit module further includes a plurality of wire binding devices for bundling internal wire harnesses.

[0013] Preferably, the contact surface of the heat sink is provided with a thermally conductive silicone grease layer.

[0014] The converter of the present invention comprises a cabinet, a control unit, a plurality of inverter modules and the above-mentioned high heat dissipation rectifier unit module.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. The present invention adopts two groups of three-phase bridge rectifier circuit modules to increase the total power of the unit, and uses a clever combination of low-cost devices to reduce the total manufacturing cost of the unit; 2. The present invention adopts two groups of three-phase bridge rectifier circuit modules, which can reduce the heat dissipation demand per unit area, and cooperate with air-cooled heat dissipation fins with strong heat dissipation capacity to achieve high heat dissipation performance of the entire unit module, improve the environmental adaptability of the high heat dissipation rectifier unit module, and better adapt to the harsh use conditions of engineering machinery; 3. All devices of the present invention are directly or indirectly installed on the radiator, the installation method is stable, and can be assembled externally as an independent module, which can reduce the difficulty of assembly and improve the working efficiency; 4. The secondary wires of the present invention are connected to the outside through the quick-plug connector on the secondary wire connector assembly, and there is no need to disassemble the secondary wire harness when disassembling the module; the primary wire connection terminals are all located at the outermost side of the high heat dissipation rectifier unit module, without obstruction above, and convenient disassembly and assembly; 5. The present invention is provided with a temperature sensor, an input current detection module, an output current detection module and a voltage detection module, which enhance the self-test capability of the high heat dissipation rectifier unit module and improve the stability of the entire electric transmission system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of the high heat dissipation rectifier unit module of the present invention;

[0017] Figure 2 This is a schematic diagram of the installation of the heat dissipation fins;

[0018] Figure 3 This is a three-dimensional diagram of the high heat dissipation rectifier unit module of the present invention after removing the upper mounting plate, voltage detection module, filter capacitor, and secondary line connector assembly;

[0019] Figure 4 It is a schematic diagram of a first group of three-phase bridge rectifier circuit modules and a second group of three-phase bridge rectifier circuit modules in the high heat dissipation rectifier unit module of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] The high heat dissipation rectifier unit module of the present invention comprises a radiator 1, a heat dissipation fin 2 is provided at the lower part of the radiator 1, and a continuous sealing material 3 is provided around the heat dissipation fin 2 at the lower part of the radiator 1 for sealing the module installation position. The fan is arranged perpendicular to the ventilation direction of the heat dissipation fin.

[0022] Each heat dissipation fin 2 has a thickness of 1 mm, a fin spacing of 3 mm, and a fin height of 90 mm, so as to obtain the best heat dissipation effect at a specified wind speed; a lifting screw mounting hole is provided on the side of the radiator 1 to facilitate the lifting operation;

[0023] The high heat dissipation rectifier unit module described in the present invention also includes a rectifier diode module 4, a filter resistor 5, a temperature sensor 6, an input current detection module 7, an output current detection module 8, an input copper busbar assembly 9, a first output copper busbar assembly 10, a second output copper busbar assembly 11, a support beam assembly 12, a handle 13, an input copper busbar support insulating plate 14, and an output copper busbar support insulating plate 22.

[0024] The rectifier diode module 4, filter resistor 5 and temperature sensor 6 are tightly installed on the upper part of the radiator 1, and thermal conductive silicone grease needs to be applied to the contact surface with the radiator 1 to reduce thermal resistance; the temperature sensor 6 is arranged between the installation gaps of the rectifier diode module 4, and can monitor the maximum temperature on the radiator 1; the input current detection module 7 and the output current detection module 8 are installed on the upper part of the radiator 1 with bolts; the support beam assembly 12 consists of two parts, which are firmly installed on both sides of the upper part of the radiator; the handle 13 is installed on the support beam assembly 12, and the handle 13 connects the two parts of the support beam assembly 12 to enhance the overall rigidity of the high heat dissipation rectifier unit module; the input copper bar support insulating plate 14 and the output copper bar support insulating plate 22 are installed on the support beam assembly 12; the input copper bar support insulating plate 14 is used to support the input copper bar assembly 9; the output copper bar support insulating plate 22 is used to support the first output copper bar assembly 10 and the second output copper bar assembly 11.

[0025] There are six rectifier diode modules 4; among them, three rectifier diode modules 4 form a first group of three-phase bridge rectifier circuit modules 100, and the remaining three rectifier diode modules 4 form a second group of three-phase bridge rectifier circuit modules 200; the input copper bar assembly 9 includes an input U phase row 91, an input V phase row 92 and an input W phase row 93; the first output copper bar assembly 10 includes a first DC negative electrode row 101 and a first DC positive electrode row 102; the second output copper bar assembly 11 includes a second DC positive electrode row 111 and a second DC negative electrode row 112; the input end of the first group of three-phase bridge rectifier circuit modules 100 and the second group of three-phase bridge rectifier circuit modules 20 0 is connected in parallel through the input copper busbar assembly 9; the current is input through the input copper busbar assembly 9, and is output through the first output copper busbar assembly 10 after being rectified by the first group of three-phase bridge rectifier circuit modules 100; at the same time, the current is also input through the input copper busbar assembly 9, and is output through the second output copper busbar assembly 11 after being rectified by the second group of three-phase bridge rectifier circuit modules 200; the input current detection module 7 can monitor the total current input into the high heat dissipation rectifier unit module, and the output current detection module 8 can monitor the output current on the first output copper busbar assembly 10 and the output current on the second output copper busbar assembly 11 respectively.

[0026] The high heat dissipation rectifier unit module of the present invention comprises an upper mounting plate 15, and the upper mounting plate 15 is mounted on the upper part of the radiator; a voltage detection module 16, a filter capacitor 17, and a secondary line connector assembly 18 are mounted above the upper mounting plate 15; and a quick-plug connector is provided on the secondary line connector assembly 18. A split bracket 151 is provided below the upper mounting plate, which is more convenient for disassembly and assembly of the upper mounting plate 15; the filter capacitor can be further reinforced by a reinforcing bracket 20 to enhance stability under harsh working conditions; a plurality of wire tying devices 21 are provided inside the high heat dissipation rectifier unit module for bundling internal wire harnesses; a wear-resistant slider 19 is provided on the side of the support beam assembly, which is convenient for disassembly and assembly of the high heat dissipation rectifier unit module; the voltage detection module 16 can monitor the input voltage and output voltage of the high heat dissipation rectifier unit module; the filter capacitor 17 and the filter resistor 5 together constitute a filter circuit.

[0027] The converter of the present invention comprises a cabinet, a control unit, a plurality of inverter modules and the above-mentioned high heat dissipation rectifier unit module.

[0028] The high heat dissipation rectifier unit module of the present invention uses two sets of three-phase bridge rectifier circuit modules to increase the total power of the unit, and uses a clever combination of low-cost devices to reduce the total manufacturing cost of the unit; at the same time, the use of two sets of three-phase bridge rectifier circuit modules can reduce the heat dissipation demand per unit area, and with the air-cooled fin heat sink with strong heat dissipation capacity, the high heat dissipation performance of the entire unit module can be achieved, and the environmental adaptability of the high heat dissipation rectifier unit module can be improved, so that the high heat dissipation rectifier unit module is more adaptable to the harsh operating conditions of engineering machinery;

[0029] Furthermore, all devices on the high heat dissipation rectifier unit module are directly or indirectly installed on the radiator, and the installation method is stable. It can be assembled externally as an independent module, which can reduce the difficulty of assembly and improve the work efficiency; the secondary wires on the high heat dissipation rectifier unit module are connected to the outside through quick-plug connectors, and there is no need to remove the secondary wiring harness when disassembling the module; the primary wire connection terminals of the high heat dissipation rectifier unit module are all located at the outermost side of the high heat dissipation rectifier unit module, with no obstruction above, and easy disassembly and assembly;

[0030] More beneficially, the high heat dissipation rectifier unit module is configured with a temperature sensor, an input and output current detection module, and a voltage detection module, which enhances the self-detection capability of the high heat dissipation rectifier unit module and improves the stability of the entire electric drive system.

Claims

1. A high heat dissipation rectifier unit module, characterized in that: The invention comprises a heat sink (1), a heat sink fin (2), a three-phase bridge rectifier circuit module, an input copper busbar assembly (9), an output copper busbar assembly, a temperature sensor (6), an input current detection module (7) and an output current detection module; the input ends of two groups of three-phase bridge rectifier circuit modules are connected in parallel through the input copper busbar assembly (9), and the output ends are respectively connected to the output copper busbar assemblies; the temperature sensor is arranged between the two groups of three-phase bridge rectifier circuit modules and is used to monitor the maximum temperature of the heat sink; the current detection module (7) is arranged on the front side of the input copper busbar assembly (9) and is used to monitor the total current of the high heat dissipation rectifier unit module; The output current detection module is arranged at the rear side of the output copper busbar assembly, and is used to monitor the output current of each group of three-phase bridge rectifier circuit modules respectively; the heat dissipation fins are arranged under the radiator, and the fan is arranged perpendicular to the ventilation direction of the heat dissipation fins.

2. The high heat dissipation rectifier unit module according to claim 1, characterized in that: A support beam assembly (12) with a handle (13) is provided on the edge of the radiator (1).

3. The high heat dissipation rectifier unit module according to claim 2, characterized in that: It also includes an input copper bar supporting insulating plate (14) and an output copper bar supporting insulating plate (22), which are installed on the supporting beam assembly and are used to support the input copper bar assembly or the output copper bar assembly.

4. The high heat dissipation rectifier unit module according to claim 3, characterized in that: It also includes an upper mounting plate (15) mounted on the upper part of the radiator, on which a voltage detection module (16), a filter capacitor (17), and a secondary line connector assembly (18) are arranged, and on which a quick-plug connector is arranged.

5. The high heat dissipation rectifier unit module according to claim 4, characterized in that: The upper mounting plate (15) is detachably mounted on the radiator via a split bracket (151).

6. The high heat dissipation rectifier unit module according to claim 2, characterized in that: The support beam assembly (12) is arranged on the radiator (1) via a slider (19).

7. The high heat dissipation rectifier unit module according to claim 4, characterized in that: The filter capacitor (17) is fixed on the upper mounting plate (15) via a reinforcing bracket (20).

8. The high heat dissipation rectifier unit module according to claim 4, characterized in that: It also includes a plurality of wire binding devices (21).

9. The high heat dissipation rectifier unit module according to claim 1, characterized in that: The contact surface of the heat sink (1) is provided with a thermally conductive silicone grease layer.

10. A converter, characterized in that: It comprises a cabinet, a control unit, a plurality of inverter modules and the high heat dissipation rectifier unit module according to any one of claims 1 to 9.

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