Automatic adjusting device for water-cooled frequency converter test bench

Abstract

The invention discloses an automatic adjusting device for a water-cooled frequency converter test bed, and relates to the technical field of heat dissipation, the automatic adjusting device comprises a frequency converter test bed function assembly, a water cooling unit and a control system, the frequency converter test bed function assembly comprises a power module, a capacitor, a laminated busbar and a radiator, and the capacitor and the power module are connected through a copper busbar. The power module is mounted on the radiator, a plurality of groups of coil flow channels are arranged in the radiator, and a medium for radiating flows in the coil flow channels; the water cooling unit is communicated with the frequency converter test bed functional assembly through a medium pipeline, and media in the water cooling unit and the frequency converter test bed functional assembly circularly flow; the control system is electrically connected with the frequency converter test bench functional assembly and used for controlling the medium flow. Due to the design of the flow channel of the radiator in the device, liquid can take away heat in the flow channel more easily, and heat exchange with higher efficiency is achieved; and due to the design of the heat dissipation aluminum plate, better optimal flow velocity and flow are provided for heat dissipation of the capacitor and the interior of the whole device.

Description

Technical Field

[0001] The invention belongs to the technical field of heat dissipation, and in particular is an automatic regulating device for a water-cooled frequency converter test bench. Background Art

[0002] In the field of electrical devices, high-power gas components often generate a lot of heat. The heat cannot be dissipated inside the device, which has a great impact on the performance of the electrical components inside the device. The normal operation of the device system will be affected due to the excessively high operating environment temperature of the device.

[0003] Currently, most test benches use air cooling for heat dissipation. Most air cooling devices are formed by fan extraction, which has the following problems: 1. The air duct is not closed, which will cause air leakage; 2. The air duct design is unreasonable, and the fan extraction air cannot achieve the heat dissipation effect; 3. The air duct design is complex and the cost is high; 4. The experiments are frequent and the cost is high; 5. There is a lack of feedback adjustment, the fan maintains high power operation, and the energy consumption is high.

[0004] In the test bench, whether it is a cabinet or a device, as long as there is heat generated by electrical components, heat dissipation is required to ensure the normal operation of the cabinet and the device. The power of current devices is getting larger and larger, and the basic heat dissipation conditions of air cooling alone cannot meet the increasing power requirements. Therefore, in the future field, liquid cooling will inevitably become the dominant trend. Summary of the invention

[0005] In order to solve the shortcomings and deficiencies in the prior art, the present application proposes an automatic adjustment device for a water-cooled inverter test bench. The device improves the overall synchronous heat dissipation effect and meets the temperature rise requirements by planning the flow path of the medium in the radiator.

[0006] In order to solve the above technical problems and achieve the above effects, the present application provides a technical solution of an automatic adjustment device for a water-cooled inverter test bench:

[0007] An automatic adjustment device for a water-cooled frequency converter test bench, comprising:

[0008] The inverter test bench functional component includes a power module, a capacitor, a stacked busbar, and a radiator. The capacitor and the power module are connected through a copper busbar. The power module is mounted on the radiator. A plurality of coil flow channels are arranged in the radiator. A medium for heat dissipation flows in the coil flow channels.

[0009] A water cooling unit, wherein the water cooling unit is connected to the inverter test bench functional components through a medium pipeline, and the medium in the water cooling unit and the inverter test bench functional components circulates;

[0010] A control system is provided, wherein the control system is electrically connected to the frequency converter test bench functional components and is used for controlling the flow of the medium.

[0011] Moreover, the control system includes a temperature controller, a processor, a display screen and a flow controller. Temperature controllers are respectively provided at the power module, the capacitor and the stacked busbar. The temperature controller is electrically connected to the control processor. The processor is respectively connected to the display screen and two flow controllers. The two flow controllers are respectively arranged at the medium inlet and the medium outlet. The temperature controller feeds back the temperature of the heat-generating gas parts and the heat-generating structural parts to the controller. The controller outputs the numerical value to the display screen and transmits the signal to the flow controller. The flow controller adjusts the size of its own flow aperture until the critical temperature rise condition of the power module is reached.

[0012] Moreover, the radiator includes a medium inlet, a medium outlet, an inlet flow channel and a coil flow channel. One end of the medium inlet is connected to the water cooling unit, and the other end of the medium inlet is connected to the inlet flow channel. A plurality of coil flow channels are evenly spaced and connected to the inlet flow channel. The outlets of the plurality of coil flow channels converge at the medium outlet, and the medium outlet is connected to the water cooling unit.

[0013] Moreover, the inlet flow channel is configured as a U-shaped tube structure, and a plurality of coil flow channels are evenly connected to the rear half of the inlet flow channel.

[0014] Moreover, the specific structure of the coil flow channel includes an inlet branch, a first coil and a second coil. One end of the inlet branch is connected to the inlet flow channel. The inlet branch, the first coil and the second coil are connected in sequence. The first coil and the second coil are both U-shaped tube structures. The first coil is arranged in the inner circle of the second coil, so that the inlet branch, the second coil and the first coil are arranged adjacent to each other in sequence.

[0015] Moreover, each group of the coil flow channels includes two symmetrically arranged inlet branches, which respectively connect the mirror-symmetrical first coil and the second coil, and then converge from the outlet of the second coil to the middle and connect to the outlet flow channel connected to the medium outlet.

[0016] Moreover, the medium inlet is arranged at the upper end of the rear side of the radiator, and the medium outlet is arranged at the lower end of the rear side of the radiator.

[0017] Furthermore, the capacitor back plates are all connected to a heat dissipation aluminum plate.

[0018] Moreover, the inverter test bench functional component is fixed on the bracket, and a shell is fixedly installed outside the inverter test bench functional component, and a display screen is arranged on the shell.

[0019] The advantages and positive effects of the present invention are:

[0020] 1. The design of the radiator flow channel in this device is more conducive to the liquid taking away heat in the flow channel, achieving more efficient heat exchange; the design of the heat dissipation aluminum plate provides a better way to dissipate heat inside the capacitor and the entire device, with the optimal flow rate and flow.

[0021] 2. In the traditional air cooling method, the working temperature of the power device on the radiator is the lowest in the center and the highest at the two ends. The liquid cooling method of this invention can balance the heat generated by each power module to a greater extent, making the temperature difference of the power modules close. The reduction in temperature means the extension of the working life of the power device. This invention extends the working life of the power device, reduces the maintenance cost of the device and the cabinet, and plays a positive market effect.

[0022] 3. This test bench can provide a reliable experimental basis for research and development and shorten the research and development cycle. Although it has a simple structure, it has powerful functions and low cost. It is suitable for various liquid cooling test projects that do not chemically react with aluminum radiators. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the external structure of a device according to an embodiment.

[0025] Figure 2 yes Figure 1 Right view of .

[0026] Figure 3 It is a schematic diagram of the internal structure of the device of the embodiment.

[0027] Figure 4 yes Figure 3 Left view of .

[0028] Figure 5 yes Figure 3 Rear view.

[0029] Figure 6 yes Figure 3 Schematic diagram of the flow channel arrangement of the radiator.

[0030] Figure 7 yes Figure 6 A magnified schematic diagram of a single flow channel structure.

[0031] Figure 8 It is a flow chart of temperature control in this embodiment.

[0032] Reference numerals: 1, housing; 2, power module; 3, capacitor; 4, radiator; 5, heat dissipation aluminum plate; 6, stacked busbar; 7, medium inlet; 8, medium outlet; 9, temperature controller; 10, flow controller; 11, display screen; 12, water cooling unit; 13, device bracket; 14, medium pipeline;

[0033] 41, inlet flow channel; 42, coil flow channel; 421, inlet branch; 422, second coil; 423, first coil; DETAILED DESCRIPTION

[0034] In order to make the structure and advantages of the present invention more clear, the structure of the present invention will be further described below in conjunction with the accompanying drawings.

[0035] An automatic adjustment device for a water-cooled inverter test bench, see attached Figure 1 As shown, it includes a water cooling unit 12, a housing 1, and a frequency converter test bench functional component. The frequency converter test bench functional component is installed on a device bracket 13. The frequency converter test bench functional component is connected to the water cooling unit 12 through input and output medium pipelines 14. The water cooling unit 12 and the medium in the frequency converter test bench functional component circulate.

[0036] In order to protect the power device, a housing 1 is fixedly installed outside the functional components of the inverter test bench, and a display screen 11 is arranged on the housing 1. The rear wall of the housing 1 is designed with installation positions for the medium inlet 7 and the medium outlet 8. The medium inlet 7 and the medium outlet 8 on the rear side of the radiator 4 are respectively connected to stainless steel adapters, one end of which is provided with an outer thread for easy connection with the radiator 4, and the other end is provided with an inner thread for connecting the pipeline leading to the water cooling unit 12.

[0037] See attached Figure 3 , 4 As shown, the functional components of the inverter test bench include a power module 22, a capacitor 33, a stacked busbar 66 and a heat sink 44, wherein the power module 2, the capacitor 3 and the stacked busbar 6 are arranged in an array according to the test design requirements and fixedly connected to the front end of the mounting plate. In this embodiment, the power module 2 is mounted on the heat sink 4, and the capacitor 3 is above the heat sink 4. The capacitor 3 and the power module 2 are connected through a copper busbar.

[0038] The heat sink structure of this embodiment is shown in FIG. Figure 6As shown, the radiator as a whole is a flat plate structure, and the radiator includes a medium inlet 7, a medium outlet 8, an inlet flow channel 41 and a coil flow channel 42. The medium inlet is connected to the inlet flow channel through a pipeline, and a plurality of coil flow channels are connected in parallel on the inlet flow channel. The outlets of the plurality of coil flow channels are connected in parallel to the medium outlet. The setting of the inlet flow channel plays a role in uniform flow, ensuring that the medium is more evenly distributed to the plurality of coil flow channels. The temperatures of the plurality of coil flow channels are similar, and the heat dissipation capacity is the same, thereby avoiding the problem of uneven temperature inside the equipment during air cooling.

[0039] The medium inlet is designed at the upper end of the rear side of the radiator, and the medium outlet is designed at the lower end of the rear side of the radiator, and the medium flow direction is selected to be in from the top and out from the bottom.

[0040] See attached Figure 7 As shown, in order to achieve better results, the specific structure of the coil flow channel 42 includes an inlet branch 421, a first coil 423 and a second coil 422. One end of the inlet branch 421 is connected to the inlet flow channel 41, and the other end of the inlet branch 421 is connected to the first coil 423. The other end of the first coil 423 is connected to the second coil 422. The first coil 423 and the second coil 422 are both U-shaped tube structures. The first coil 423 is arranged in the inner circle of the second coil 422. The structure forms an inlet branch, the second coil 422, and the first coil 423 are adjacent to each other. The medium flow order is the inlet branch, the first coil 423, and the second coil 422. The medium temperature gradually increases, and the high and low temperature intervals of the medium temperature are set to form a more stable cooling effect to avoid local temperature imbalance.

[0041] In this embodiment, each group of coil flow channels 42 includes two symmetrically arranged inlet branches 421, which are respectively connected to the mirror-symmetrical first coil 423 and the second coil 422, and then concentrated from the outlet of the second coil to the middle and connected to the outlet flow channel connected to the medium outlet 8.

[0042] In order to facilitate the control of the medium flow rate, the medium inlet 7 and the medium outlet 8 are respectively connected to a flow controller 10, which is installed at the front end of the medium inlet 7 and not far from the inlet, and at the rear end of the medium outlet 8 and not far from the outlet. The flow controller 10 used in this embodiment has a display screen 11 and a sensor signal. When the medium flow rate changes, the display screen 11 will display the value of the flow rate, which is convenient for operators to read and record data.

[0043] See attached Figure 5As shown, in order to further improve the heat dissipation effect, the back plate of the capacitor 3 is connected to a heat dissipation aluminum plate 5, and the material characteristics of the aluminum plate for rapid heat dissipation are used to improve the heat dissipation efficiency of the upper structure. In addition to the natural heat dissipation method, the heat dissipation of the capacitor 3 is further achieved by adding a heat dissipation aluminum plate 5. The aluminum plate is connected to the back of the radiator 4. The medium flowing in the radiator 4 can not only dissipate heat for the power module 2 on the front, but also provide cooling energy for the heat dissipation aluminum plate 5. While the aluminum plate dissipates heat itself, it can also further dissipate heat through the flowing medium in the radiator 4, achieving double-effect heat dissipation.

[0044] The control system of the automatic adjustment device in this embodiment is shown in the attached Figure 8 As shown, the control system includes a temperature controller, a processor, a display screen and a flow controller. Temperature controllers are respectively provided at the power module, the capacitor and the copper busbar connecting the power module and the capacitor. The temperature controller is connected to the control processor, and the processor is respectively connected to the display screen and the flow controller.

[0045] The flow controller sets the initial flow rate. As the test starts, the power module starts working. The temperature controller feeds back the temperature of the heat-generating gas parts and heat-generating structural parts to the controller at any time. The controller outputs the numerical value to the display screen synchronously, and transmits the adjustment signal to the flow controller according to the critical value of the preset temperature. If the detected temperature is higher or lower than the critical value, the flow controller adjusts its own flow caliber size. Through continuous repeated adjustments, the optimal flow rate of the final device is determined to achieve the critical condition of the temperature rise of the power device, thereby realizing the use of high-power frequency conversion devices.

[0046] When the temperature of the power module, capacitor, or busbar is too high, the flow controller receives a feedback signal and automatically reduces the flow diameter of the pipe opening, reducing the flow area to achieve the purpose of reducing the flow rate, and vice versa.

[0047] This device can not only meet the high power density is the realization of the frequency conversion device function test, but also can better take away the heat of the heating device, increase the service life of the gas parts, and achieve high power frequency conversion device output. The flow path of the medium in the radiator has been planned, and the heat is carried out of the device from the pipe outlet through the radiator channel in a predetermined direction, using the heat dissipation medium to realize the heat dissipation function of the entire device. At the same time, the power device temperature controller can feedback the temperature control value of the device to the flow controller at the inlet and outlet of the radiator flow channel. After continuous feedback, it can be found that the critical value of the power device temperature is within the range of this test bench. The power module, capacitor, radiator, busbar, etc. are simple to disassemble and assemble, and easy to implement. In theory, as long as the medium of the radiator can quickly take away the heat of the heating device, then no matter how large the power of the frequency conversion device is, it can meet the temperature rise requirements and realize the development of devices with higher power levels.

[0048] The above descriptions are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic adjustment device for a water-cooled frequency converter test bench, characterized in that: include: The inverter test bench functional component includes a power module, a capacitor, a stacked busbar, and a radiator. The capacitor and the power module are connected through a copper busbar. The power module is mounted on the radiator. A plurality of coil flow channels are arranged in the radiator. A medium for heat dissipation flows in the coil flow channels. A water cooling unit, wherein the water cooling unit is connected to the inverter test bench functional components through a medium pipeline, and the medium in the water cooling unit and the inverter test bench functional components circulates; A control system is provided, wherein the control system is electrically connected to the frequency converter test bench functional components and is used for controlling the flow of the medium.

2. The automatic adjustment device for a water-cooled frequency converter test bench according to claim 1 is characterized in that: The control system includes a temperature controller, a processor, a display screen and a flow controller. Temperature controllers are respectively provided at the power module, the capacitor and the stacked busbar. The temperature controller is electrically connected to the control processor. The processor is respectively connected to the display screen and two flow controllers. The two flow controllers are respectively arranged at the medium inlet and the medium outlet. The temperature controller feeds back the temperature of the heat-generating gas parts and the heat-generating structural parts to the controller. The controller outputs the numerical value to the display screen and transmits the signal to the flow controller. The flow controller adjusts the size of its own flow aperture until the critical temperature rise condition of the power module is reached.

3. The automatic adjustment device for a water-cooled frequency converter test bench according to claim 1 is characterized in that: The radiator includes a medium inlet, a medium outlet, an inlet flow channel and a coil flow channel. One end of the medium inlet is connected to a water cooling unit, and the other end of the medium inlet is connected to the inlet flow channel. A plurality of coil flow channels are evenly spaced and connected to the inlet flow channel. The outlets of the plurality of coil flow channels converge at the medium outlet, and the medium outlet is connected to the water cooling unit.

4. The automatic adjustment device for a water-cooled frequency converter test bench according to claim 1 is characterized in that: The inlet flow channel is configured as a U-shaped tube structure, and a plurality of coil flow channels are evenly connected to the rear half of the inlet flow channel.

5. The automatic adjustment device for a water-cooled frequency converter test bench according to claim 1 is characterized in that: The specific structure of the coil flow channel includes an inlet branch, a first coil and a second coil. One end of the inlet branch is connected to the inlet flow channel. The inlet branch, the first coil and the second coil are connected in sequence. The first coil and the second coil are both U-shaped tube structures. The first coil is arranged in the inner circle of the second coil, so that the inlet branch, the second coil and the first coil are arranged adjacent to each other in sequence.

6. The automatic adjustment device for a water-cooled frequency converter test bench according to claim 5 is characterized in that: Each group of the coil flow channels includes two symmetrically arranged inlet branches, which are respectively connected to the mirror-symmetrical first coil and the second coil, and then concentrated from the outlet of the second coil to the middle and connected to the outlet flow channel connected to the medium outlet.

7. The automatic adjustment device for a water-cooled frequency converter test bench according to claim 5 is characterized in that: The medium inlet is arranged at the upper end of the rear side of the radiator, and the medium outlet is arranged at the lower end of the rear side of the radiator.

8. The automatic adjustment device for a water-cooled frequency converter test bench according to claim 1 is characterized in that: The capacitor back plates are all connected to the heat dissipation aluminum plates.

9. The automatic adjustment device for a water-cooled frequency converter test bench according to claim 1, characterized in that: The inverter test bench functional component is fixed on a bracket, and a shell is fixedly installed outside the inverter test bench functional component, and a display screen is arranged on the shell.

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