DCDC power converter

Abstract

The utility model provides a DCDC power supply converter, and relates to the technical field of DCDC power supply converters, the DCDC power supply converter comprises a main control board, and the main control board is provided with an input EMC / EMI circuit, a soft start circuit, a BOOST inductance circuit, a BOOST power circuit, a BOOST filter circuit, an LLC power circuit, an LLC resonant capacitor / LLC resonant inductance circuit, an LLC power transformer, a half-wave rectification filter circuit and an output circuit which are connected in sequence. A U-shaped loop is formed, so that the input EMC / EMI circuit and the output circuit are arranged on the same side; and the MCU control circuit is arranged at the middle position of the U-shaped loop. And meanwhile, the space of the whole machine can be saved, the layout is compact, the integration level of the DCDC power supply converter is improved, a peripheral circuit is simplified, and the stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of DCDC power converters, in particular to a DCDC power converter. Background Art

[0002] DCDC power converters are generally composed of control circuits, output inductors, voltage regulator diodes, and output voltage regulator capacitors. DCDC switching power converters generally include boost, buck, boost / buck, and reverse polarity circuits. However, traditional power DCDC power converters have the disadvantages of low integration, complex peripheral circuits, poor stability, small input / output range, and large output voltage ripple. Therefore, it is necessary to improve the functional characteristics of DCDC power based on boost-type DCDC converter circuits. Utility Model Content

[0003] The present application provides a DCDC power converter to at least solve the technical problems existing in the related art.

[0004] According to one aspect of an embodiment of the present application, a DCDC power converter is provided, including a main control board, wherein the main control board is provided with: an input EMC / EMI circuit, a soft-start circuit, a BOOST inductor circuit, a BOOST power circuit, a BOOST filter circuit, an LLC power circuit, an LLC resonant capacitor / LLC resonant inductor circuit, an LLC power transformer, a half-wave rectifier filter circuit and an output circuit connected in sequence, forming a U-shaped loop, so that the input EMC / EMI circuit and the output circuit are arranged on the same side; and also includes an MCU control circuit, which is arranged in the middle position of the U-shaped loop.

[0005] As an optional implementation, it further includes a liquid-cooled radiator and a circuit board housing, wherein the circuit board housing and the first side surface of the liquid-cooled radiator housing form a receiving cavity, and the main control board is disposed in the receiving cavity.

[0006] As an optional embodiment, the first side end of the liquid-cooled radiator housing corresponding to the input EMC / EMI circuit and the output circuit is provided with an input power interface connected to the input EMC / EMI circuit, a communication interface connected to the MCU control circuit, and an output power interface connected to the output circuit.

[0007] As an optional embodiment, the liquid-cooled radiator includes a heat dissipation water channel, a coolant input channel and a coolant output channel. The heat dissipation water channel is arranged in a heat dissipation cavity formed by the liquid-cooled radiator shell. The coolant input channel and the coolant output channel pass through the liquid-cooled radiator shell and are respectively connected to both ends of the heat dissipation water channel.

[0008] As an optional implementation, the coolant input channel and the coolant output channel are both arranged at the second side end of the circuit board housing; wherein the first side end is arranged opposite to the second side end.

[0009] As an optional implementation, the heat dissipation water channel is formed in an M shape.

[0010] As an optional implementation, it further includes: a power board, which is arranged in the accommodating cavity, and the main control board and the power board are embedded in the accommodating cavity.

[0011] As an optional implementation, the power board is provided with a notch.

[0012] As an optional implementation, it further includes a high-power heating device, and the high-power heating device is directly installed on the first side surface through the notch.

[0013] As an optional implementation, the LLC power circuit includes a symmetrical half-bridge LLC circuit.

[0014] In an embodiment of the present application, a DCDC power converter is provided, including a main control board, wherein the main control board is provided with: an input EMC / EMI circuit, a soft start circuit, a BOOST inductor circuit, a BOOST power circuit, a BOOST filter circuit, an LLC power circuit, an LLC resonant capacitor / LLC resonant inductor circuit, an LLC power transformer, a half-wave rectifier filter circuit and an output circuit connected in sequence, forming a U-shaped loop, so that the input EMC / EMI circuit and the output circuit are arranged on the same side; and further comprising an MCU control circuit, which is arranged in the middle of the U-shaped loop. This arrangement enables the interface of the input EMC / EMI circuit and the interface of the output circuit to be on the same side of the whole machine, which is convenient for users to connect the wires, and can save the space of the whole machine at the same time, with a compact layout, thereby improving the integration of the DCDC power converter, simplifying the peripheral circuit and improving the stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1It is a schematic diagram of a modular structure of a main control board of an optional DCDC power converter provided according to an embodiment of the present application;

[0018] Figure 2 is a schematic structural diagram of an optional DCDC power converter provided according to an embodiment of the present application;

[0019] Figure 3 It is a structural schematic diagram of another optional liquid-cooled radiator of a DCDC power converter provided according to an embodiment of the present application.

[0020] Reference numerals

[0021] 1 circuit board housing; 12 input power interface; 13 output power interface; 14 communication interface;

[0022] 2 liquid cooling radiator housing; 21 cooling water channel; 22 cooling liquid input channel; 23 cooling liquid output channel. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] DCDC power converters are generally composed of control circuits, output inductors, voltage regulator diodes, and output voltage regulator capacitors. DCDC switching power converters generally include boost, buck, boost / buck, and reverse polarity circuits. However, traditional power DCDC power converters have the disadvantages of low integration, complex peripheral circuits, poor stability, small input / output range, and large output voltage ripple. Therefore, it is necessary to improve the functional characteristics of DCDC power based on boost-type DCDC converter circuits.

[0026] like Figure 1 As shown, an embodiment of the present application provides a DCDC power converter, including: a main control board, wherein the main control board is provided with:

[0027] The following are connected in sequence: an input EMC / EMI circuit, a soft-start circuit, a BOOST inductor circuit, a BOOST power circuit, a BOOST filter circuit, an LLC power circuit, an LLC resonant capacitor / LLC resonant inductor circuit, an LLC power transformer, a half-wave rectifier filter circuit, and an output circuit, forming a U-shaped loop, so that the input EMC / EMI circuit and the output circuit are arranged on the same side;

[0028] It also includes an MCU control circuit, which is arranged in the middle of the U-shaped loop.

[0029] Specifically, the interface of the input EMC / EMI circuit and the interface of the output circuit can be placed on the same side of the whole machine, which is convenient for users to connect the wires. At the same time, it can save the space of the whole machine, make the layout compact, improve the integration of the DCDC power converter, simplify the peripheral circuit and improve the stability.

[0030] like Figure 2-3 As shown, exemplarily, it also includes a liquid-cooled radiator and a circuit board housing 1, and the circuit board housing 1 and the first side of the liquid-cooled radiator housing 2 form a receiving cavity, and the main control board is arranged in the receiving cavity.

[0031] Specifically, the liquid cooling radiator and the circuit board housing 1 directly form a receiving cavity, that is, one side of the liquid cooling radiator housing 2 is also one side of the circuit board housing 1, so that the liquid cooling radiator can directly dissipate heat for the circuit in the receiving cavity, greatly improving the heat dissipation effect of the liquid cooling radiator, reducing the overall volume of the converter, and improving the heat dissipation efficiency of the circuit in the receiving cavity. This makes the converter compact in layout and good in heat dissipation; the housing dissipates heat through water cooling, has no heat dissipation holes, and has good electromagnetic compatibility.

[0032] In addition, it should be noted that aluminum alloy material can be used as the liquid cooling radiator housing 2 to further improve the heat dissipation effect of the radiator.

[0033] As an optional embodiment, the first side end of the liquid-cooled radiator housing 2 corresponding to the input EMC / EMI circuit and the output circuit is provided with an input power interface 12 connected to the input EMC / EMI circuit, a communication interface 14 connected to the MCU control circuit, and an output power interface 13 connected to the output circuit.

[0034] As an optional embodiment, the liquid-cooled radiator includes a heat dissipation water channel 21, a coolant input channel 22 and a coolant output channel 23. The heat dissipation water channel 21 is arranged in the heat dissipation cavity formed by the liquid-cooled radiator shell 2, and the coolant input channel 22 and the coolant output channel 23 pass through the liquid-cooled radiator shell 2 and are respectively connected to both ends of the heat dissipation water channel 21.

[0035] Specifically, the coolant enters the heat dissipation channel 21 through the coolant input channel 22 , dissipates heat and cools the circuit in the accommodating cavity in the heat dissipation channel 21 , and then flows out of the heat dissipation cavity through the coolant output channel 23 .

[0036] As an optional implementation, the cooling liquid input channel 22 and the cooling liquid output channel 23 are both arranged at the second side end of the circuit board housing 1; wherein the first side end is arranged opposite to the second side end.

[0037] It should be understood that the first side end and the second side end can be arranged relative to each other, that is, one side end of the liquid-cooled radiator housing 2 is used for the input and output of signals, and the other side end is used for the output and input of cooling liquid. This arrangement can make the converter simple and beautiful in appearance and compact in layout, while also improving the heat dissipation efficiency of the converter and reducing the overall volume of the converter.

[0038] As an optional implementation, the heat dissipation channel 21 is formed in an M shape.

[0039] Specifically, the heat dissipation channels 21 are arranged in an M shape, so that the heat dissipation channels 21 can be evenly and neatly distributed in the heat dissipation inner cavity, so that the circuit in the accommodating cavity can be evenly and effectively cooled.

[0040] As an optional implementation, it further includes: a power board, which is arranged in the accommodating cavity, and the main control board and the power board are embedded in the accommodating cavity.

[0041] The main control board and the power board are embedded, which can save the space of the whole machine and increase the power density. In addition, the input power interface 12, the output power interface 13 and the communication interface can adopt aviation plugs, which have good sealing and convenient wiring.

[0042] As an optional implementation, the power board is provided with a notch.

[0043] As an optional implementation, it further includes a high-power heating device, and the high-power heating device is directly installed on the first side surface through the notch.

[0044] Specifically, a gap is opened on the power board, and power devices with large heat generation can be directly mounted on the heat sink bottom plate, which has a compact layout and good heat dissipation.

[0045] As an optional implementation, the LLC power circuit includes a symmetrical half-bridge LLC circuit.

[0046] The input variable DC voltage of 400V~700V can be stabilized to 720V, providing a relatively stable DC power supply for the subsequent LLC variable circuit. The stable DC voltage can make the gain control of the subsequent LLC circuit within a reasonable range during frequency modulation control. In addition, the output voltage can be set to 90~130V, and the maximum output current can reach 68A. By using half-wave rectification current, the rectification power devices are reduced by half, and the conduction loss is reduced by half, which can reduce power semiconductor devices and improve overall efficiency.

[0047] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0048] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling one or more electronic devices (such as personal computers, servers, or network devices) to perform all or part of the steps of the methods described in the various embodiments of the present application.

[0049] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0050] In the several embodiments provided in the present application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0051] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution provided in this embodiment.

[0052] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0053] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0054] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A DCDC power converter, characterized in that: It includes a main control board, which is provided with: The following are connected in sequence: an input EMC / EMI circuit, a soft-start circuit, a BOOST inductor circuit, a BOOST power circuit, a BOOST filter circuit, an LLC power circuit, an LLC resonant capacitor / LLC resonant inductor circuit, an LLC power transformer, a half-wave rectifier filter circuit, and an output circuit, forming a U-shaped loop, so that the input EMC / EMI circuit and the output circuit are arranged on the same side; It also includes an MCU control circuit, which is arranged in the middle of the U-shaped loop.

2. The DCDC power converter according to claim 1, wherein: It also includes a liquid-cooled radiator and a circuit board shell. The circuit board shell and the first side surface of the liquid-cooled radiator shell form a receiving cavity, and the main control board is arranged in the receiving cavity.

3. The DCDC power converter according to claim 2, wherein: The first side end of the liquid-cooled radiator housing corresponding to the input EMC / EMI circuit and the output circuit is provided with an input power interface connected to the input EMC / EMI circuit, a communication interface connected to the MCU control circuit, and an output power interface connected to the output circuit.

4. The DCDC power converter according to claim 3, characterized in that: The liquid-cooled radiator includes a heat dissipation water channel, a coolant input channel and a coolant output channel. The heat dissipation water channel is arranged in a heat dissipation cavity formed by the liquid-cooled radiator shell. The coolant input channel and the coolant output channel pass through the liquid-cooled radiator shell and are respectively connected to two ends of the heat dissipation water channel.

5. The DCDC power converter according to claim 4, characterized in that: The cooling liquid input channel and the cooling liquid output channel are both arranged at the second side end of the circuit board housing; wherein the first side end is arranged opposite to the second side end.

6. The DCDC power converter according to claim 5, characterized in that: The heat dissipation water channel forms an M shape.

7. The DCDC power converter according to claim 4, characterized in that: Also includes: The power board is arranged in the accommodating cavity, and the main control board and the power board are embeddedly installed in the accommodating cavity.

8. The DCDC power converter according to claim 7, characterized in that: The power board is provided with a notch.

9. The DCDC power converter according to claim 8, characterized in that: It also includes a high-power heating device, which is directly installed on the first side surface through the notch.

10. The DCDC power converter according to claim 1, wherein: The LLC power circuit includes a symmetrical half-bridge LLC circuit.

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