Power unit and frequency converter

Abstract

The embodiment of the utility model provides a power unit and a frequency converter, and the power unit comprises a box body; the radiator assembly is arranged on one side of the box body in the height direction, and the radiator assembly comprises a rectifier module and a transistor module; the input busbar is arranged on one side of the box body, and the input busbar is electrically connected with the rectifier module; the output busbar is arranged on the other side of the box body, and the output busbar is electrically connected with the transistor module; and the capacitor assembly is arranged in the box body and is electrically connected with the radiator assembly. According to the technical scheme, modular installation is adopted, assembly difficulty is reduced, maintenance is convenient, and reliability is high.

Description

Technical Field

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

[0002] At present, there are many parts in the power unit of the inverter, and the assembly methods of different parts are also different, so the installation is more complicated and the installation efficiency is low. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0004] In view of this, an embodiment of a first aspect of the present utility model provides a power unit.

[0005] An embodiment of a second aspect of the utility model provides a frequency converter.

[0006] In order to achieve the above-mentioned purpose, an embodiment of the first aspect of the utility model provides a power unit, including: a box body; a heat sink assembly, arranged on one side of the box body in the height direction, the heat sink assembly including a rectifier module and a transistor module; an input busbar, arranged on one side of the box body, and the input busbar is electrically connected to the rectifier module; an output busbar, arranged on the other side of the box body, and the output busbar is electrically connected to the transistor module; a capacitor assembly, arranged in the box body, and the capacitor assembly is electrically connected to the heat sink assembly.

[0007] The power unit proposed according to the utility model mainly includes a box body, a capacitor assembly located in the box body, a heat sink assembly located outside the box body, and an input busbar and an output busbar arranged on both sides of the box body. Specifically, the box body serves as the outer shell of the entire power unit, providing support and protection for the internal components, and may also provide isolation and safety. On this basis, the heat sink assembly is installed on one side of the box body, including a rectifier module and a transistor module. The heat sink assembly is used to dissipate heat, and discharges the heat generated by the rectifier module and the transistor module during operation to the outside. In addition, an input busbar and an output busbar are also provided, which are respectively arranged on opposite sides of the box body, and are used for conduction. The input busbar is connected to the rectifier module, and the output busbar is connected to the transistor module.

[0008] It should be emphasized that in this solution, the entire power unit is modularly designed and is divided into three major parts: a box body, a heat sink assembly, and a capacitor assembly. By adopting modular installation, the difficulty of assembly is reduced, maintenance is convenient, and reliability is high.

[0009] It should be added that a capacitor assembly is installed inside the box for circuit filtering. In addition, the capacitor assembly is also electrically connected to the heat sink assembly. Since the input busbar and the output busbar are located on both sides, the circuit separation and conduction functions can be achieved. The rectifier module and the transistor module are used for rectification and inversion of electric energy.

[0010] In some technical schemes, optionally, the heat sink assembly includes: a heat sink; a rectifier module connected to the heat sink, and the rectifier module is arranged on the air inlet side of the heat sink; a transistor module connected to the heat sink, and the transistor module is arranged on the air outlet side of the heat sink; a loop stacked busbar, connected in series with the rectifier module and the transistor module.

[0011] In this technical solution, the radiator is the main element for heat dissipation and can be made of materials with good heat dissipation effect. Both the rectifier module and the transistor module are connected to the radiator to facilitate heat dissipation and ensure the normal operation of the components. Specifically, the rectifier module is connected to the radiator and is placed on the air inlet side of the radiator. The rectifier module is usually used for power rectification in the power unit to convert alternating current into direct current. The transistor module is also connected to the radiator, but is placed on the air outlet side of the radiator. The transistor module is used for inversion.

[0012] The loop stack busbar is used to connect the circuit elements of the rectifier module and the transistor module. Under the action of the loop stack busbar, the rectifier module and the transistor module can be connected in series, which can transfer electric energy in the circuit, control the current and achieve circuit stability.

[0013] It should be added that this connection method helps to optimize heat dissipation, so that the rectifier module and the transistor module can be fully cooled on different sides of the radiator, thereby keeping the operating temperature of the electronic components within a safe range. At the same time, the series connection of the rectifier module and the transistor module in the loop stacking busbar can ensure the stability and normal operation of the circuit.

[0014] In some technical solutions, optionally, it includes: a control board, which is arranged on the air outlet side of the radiator assembly; wherein the capacitor assembly is located on the air inlet side of the radiator assembly.

[0015] In this technical solution, the control board is located on the air outlet side of the radiator assembly. The control board is used to monitor and control various operations of the power unit, including controlling current, voltage, etc., and contains sensors and circuits for monitoring circuit status. The capacitor assembly is located on the air inlet side of the radiator assembly. The capacitor assembly consists of multiple capacitors and is used for filtering, which helps to stabilize voltage or current.

[0016] In some technical solutions, optionally, the capacitor assembly includes: a frame body, arranged in a box; a capacitor stack busbar, arranged on the upper side of the frame body; a film capacitor, arranged in the frame body, and the capacitor stack busbar is electrically connected to each film capacitor.

[0017] In this technical solution, the capacitor assembly includes a frame body located inside the box, which is a supporting structure used to fix and support the capacitor assembly to ensure easier installation and maintenance. In addition, a capacitor stack busbar is provided above the frame body, which is used to connect the capacitors and provide electrical connections so that the capacitors can be connected in parallel or in series as required.

[0018] Film capacitors are also located within the frame body. Film capacitors are electronic components used to store and release electrical energy. They play a role in circuit filtering and are usually composed of dielectric materials between two conductive layers. These capacitors are connected to the capacitor stack busbars to achieve the required electrical connections in the entire capacitor assembly.

[0019] It should be added that the entire structure appears to be a frame for housing and connecting multiple film capacitors, with capacitor stack busbars on top to effectively connect these capacitors. This arrangement may help provide security and organization of the capacitors and ensure proper connection between capacitors to achieve the required electrical connection.

[0020] In some technical solutions, optionally, it includes: a handle, which is arranged on the frame body.

[0021] In this technical solution, the presence of a handle is usually used to facilitate transportation and installation. In this case, the handle is located on the frame body and may be a handle or grip made of metal, plastic or other suitable materials, which is convenient for users to grasp and lift when they need to move or carry the capacitor assembly. This design takes into account the convenience and safety of the user and makes the transportation process more convenient and simple.

[0022] In some technical solutions, optionally, the loop stack busbar of the heat sink assembly is electrically connected to the capacitor stack busbar of the capacitor assembly.

[0023] In this technical solution, the connection method is usually used to ensure the electrical connection between the various components in the power unit. By electrically connecting the loop stack busbar of the heat sink assembly with the capacitor stack busbar of the capacitor assembly, current transmission and electrical connection between different components can be achieved. This connection method helps to maintain the electrical stability and performance of the entire power unit, enabling them to work together to complete the task of power conversion and control.

[0024] In some technical solutions, optionally, the input busbar and the output busbar are arranged on both sides of the box in a first direction, and the box is provided with an opening in a second direction perpendicular to the first direction. The box also includes: a side panel, which is detachably connected to the opening; wherein the first direction, the second direction and the height direction are perpendicular to each other.

[0025] In this technical solution, the box is usually used to facilitate assembly and maintenance, while providing easy access and operation. By placing the input busbar and the output busbar on both sides of the first direction and providing an opening in the second direction perpendicular to the first direction, it can be used for assembly and debugging, and the connection can be easily disassembled using the side panels. The box designed in this way makes the internal components easy to install, debug, and maintain, and is conducive to inspection, repair or update. At the same time, the design also ensures air circulation and heat dissipation, maintaining the normal operating temperature of the internal components.

[0026] In some technical solutions, optionally, it includes: an insulator, which is arranged on the same side of the box as the output busbar.

[0027] In this technical solution, insulators are placed next to the output busbar to provide insulation and protection, prevent current or voltage from leaking to surrounding components or the environment, and ensure the safe operation of the output circuit.

[0028] In some technical solutions, optionally, it includes: a fuse, which is arranged on the same side of the box as the input busbar, and the fuse is connected in series with the input busbar.

[0029] In this technical solution, the fuse is placed next to the input busbar and connected in series with the input busbar. The function of the fuse is to cut off the circuit when the current is overloaded to prevent excessive current from appearing in the circuit, avoiding damage to internal devices or other possible safety hazards caused by current overload.

[0030] An embodiment of a second aspect of the utility model provides a frequency converter, comprising: a power unit of the embodiment of the first aspect mentioned above.

[0031] The frequency converter provided by the utility model includes a power unit, which plays the role of converting electric energy in the frequency converter and is responsible for converting electric energy from a power supply into an output of a specific frequency and voltage to drive a motor or other equipment.

[0032] Since the frequency converter includes a power unit, it has the beneficial effects of any power unit in the above-mentioned first aspect embodiment, which will not be described in detail here.

[0033] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the structure of a power unit according to an embodiment of the utility model is shown;

[0035] Figure 2 A schematic diagram of the structure of a power unit according to an embodiment of the utility model is shown;

[0036] Figure 3A schematic diagram of the structure of a power unit according to an embodiment of the utility model is shown;

[0037] Figure 4 A schematic structural diagram of a radiator assembly according to an embodiment of the utility model is shown;

[0038] Figure 5 A schematic structural diagram of a capacitor assembly according to an embodiment of the utility model is shown;

[0039] Figure 6 A schematic structural diagram of a frequency converter according to an embodiment of the utility model is shown.

[0040] in, Figures 1 to 6 The corresponding relationship between the reference numerals and the component names is as follows:

[0041] 100: power unit; 102: box; 1022: opening; 1024: side panel; 104: heat sink assembly; 1042: rectifier module; 1044: transistor module; 1046: heat sink; 1048: loop laminated busbar; 106: input busbar; 108: output busbar; 110: capacitor assembly; 1102: frame body; 1104: capacitor laminated busbar; 1106: film capacitor; 1108: handle; 112: control board; 114: insulator; 116: fuse;

[0042] 200: Inverter. DETAILED DESCRIPTION

[0043] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the embodiments of the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0045] Refer to the following Figures 1 to 6 Some embodiments according to the present invention are described.

[0046] like Figure 1 and Figure 2As shown, a power unit 100 proposed in this embodiment mainly includes a box 102, a capacitor assembly 110 located in the box 102, a heat sink assembly 104 located outside the box 102, and an input busbar 106 and an output busbar 108 arranged on both sides of the box 102. Specifically, the box 102 serves as the outer shell of the entire power unit 100, providing support and protection for internal components, while providing isolation and safety. On this basis, the heat sink assembly 104 is installed on one side of the box 102, and the heat sink assembly 104 includes a heat sink 1046 and a rectifier module 1042 and a transistor module 1044 on 1046. The heat sink assembly 104 is used to dissipate heat, and discharges the heat generated by the rectifier module 1042 and the transistor module 1044 during operation. In addition, an input busbar 106 and an output busbar 108 are provided, which are respectively arranged on opposite sides of the box body 102 , and are used for conducting electricity. The input busbar 106 is connected to the rectifier module 1042 , and the output busbar 108 is connected to the transistor module 1044 .

[0047] It should be emphasized that in this solution, the entire power unit 100 is modularly designed and is divided into three major parts: a housing 102, a heat sink assembly 104, and a capacitor assembly 110. By adopting modular installation, the difficulty of assembly is reduced, maintenance is convenient, and reliability is high.

[0048] It should be added that a capacitor assembly 110 is installed inside the box 102 to store energy and perform circuit filtering. In addition, the capacitor assembly 110 is also electrically connected to the radiator assembly 104. Since the input busbar 106 and the output busbar 108 are located on both sides, the circuit separation and conductive function can be achieved. The rectifier module 1042 and the transistor module 1044 are used for rectification and inversion of electric energy.

[0049] In one embodiment, optionally, Figure 4 As shown, the radiator 1046 is the main element for heat dissipation and can be made of materials with good heat dissipation effect. The rectifier module 1042 and the transistor module 1044 are both connected to the radiator 1046 to facilitate heat dissipation and ensure the normal operation of the components. Specifically, the rectifier module 1042 is connected to the radiator 1046 and is placed on the air inlet side of the radiator 1046. The rectifier module 1042 is usually used for power rectification in the power unit 100 to convert alternating current into direct current. The transistor module 1044 is also connected to the radiator 1046, but is placed on the air outlet side of the radiator 1046. The transistor module 1044 is used to control current and voltage.

[0050] The loop stack busbar 1048 is used to connect the circuit elements of the rectifier module 1042 and the transistor module 1044. Under the action of the loop stack busbar 1048, the rectifier module 1042 and the transistor module 1044 can be connected in series to facilitate the transmission of electrical energy in the circuit, control of current and realization of circuit stability.

[0051] It should be added that this connection method helps to optimize heat dissipation, so that the rectifier module 1042 and the transistor module 1044 can be sufficiently cooled on different sides of the heat sink 1046, thereby keeping the operating temperature of the electronic components within a safe range. At the same time, the rectifier module 1042 and the transistor module 1044 can ensure the stability and normal operation of the circuit under the series connection of the loop stack busbar 1048.

[0052] In one embodiment, optionally, Figure 4 As shown, the control board 112 is located on the air outlet side of the heat sink assembly 104. The control board 112 is used to monitor and control various operations of the power unit 100, which may include controlling current, voltage, etc., and includes sensors and circuits for monitoring circuit status. The capacitor assembly 110 is located on the air inlet side of the heat sink assembly 104. The capacitor assembly 110 is composed of multiple capacitors and is used for circuit filtering to help stabilize voltage or current.

[0053] This layout is to ensure that the control board 112 and the capacitor assembly 110 are placed separately on both sides of the radiator assembly 104 to avoid concentrated heat generation, which may cause mutual influence between the control board 112 and the capacitor assembly 110, and help keep the control board 112 and the capacitor working within a suitable temperature range to ensure their normal operation and life. It can be understood that the above arrangement is also conducive to reducing the overall height size and making rational use of space.

[0054] In one embodiment, optionally, Figure 5 As shown, the capacitor assembly 110 includes a frame body 1102 located inside the box 102. The frame body 1102 is a support structure used to fix and support the components of the capacitor to ensure that they are safely placed and not damaged. In addition, a capacitor stack busbar 1104 is provided above the frame body 1102. The capacitor stack busbar 1104 is used to connect the capacitors and provide electrical connections so that the capacitors can be connected in parallel or in series as required.

[0055] Film capacitors 1106 are also provided in the frame body 1102. Film capacitors 1106 are electronic components used to store and release electrical energy, and are generally composed of a dielectric material between two conductive layers. These capacitors are connected to the capacitor stack busbars 1104 to achieve the required electrical connection in the entire capacitor assembly 110.

[0056] It should be added that the entire structure appears to be a frame for accommodating and connecting multiple film capacitors 1106, with capacitor stack busbars 1104 on top to effectively connect these capacitors. This arrangement may help provide security and organization of the capacitors and ensure proper connection between capacitors to achieve the required electrical connection.

[0057] In one embodiment, optionally, Figure 3 As shown, the presence of the handle 1108 facilitates transportation and installation. In this case, the handle 1108 is located on the frame body 1102, and may be a handle or grip made of metal, plastic or other appropriate materials, which facilitates the user to grasp and lift the capacitor assembly 110 when it is necessary to move or carry it. This design takes into account the convenience and safety of the user and makes the transportation process more convenient and simple.

[0058] In one embodiment, optionally, the connection method is generally used to ensure electrical connection between various components in the power unit 100. By electrically connecting the loop stack busbar 1048 of the heat sink assembly 104 with the capacitor stack busbar 1104 of the capacitor assembly 110, current transmission and electrical connection between different components can be achieved. This connection method helps to maintain the electrical stability of the entire power unit 100 and ensure effective communication between various components so that they can work together to complete the task of power conversion and control.

[0059] In one embodiment, optionally, Figure 2 and Figure 3 As shown, the box 102 is generally used for easy assembly and maintenance, while providing easy access and operation. By placing the input busbar 106 and the output busbar 108 on both sides of the first direction, and providing an opening 1022 in a second direction perpendicular to the first direction, the connection can be easily disassembled using the side panel 1024. The box 102 designed in this way makes the internal components easy to install, maintain and replace, which is conducive to inspection, repair or update. At the same time, the design also ensures air circulation and heat dissipation, maintaining the normal operating temperature of the internal components.

[0060] In one embodiment, optionally, an insulator 114 is placed next to the output busbar 108 to provide insulation and protection to prevent current or voltage from leaking to surrounding components or the environment, thereby ensuring safe operation of the output circuit.

[0061] In one embodiment, the fuse 116 is optionally placed next to the input busbar 106 and connected in series with the input busbar 106. The function of the fuse 116 is to cut off the circuit when the current is overloaded to prevent excessive current from appearing in the circuit, thereby avoiding equipment damage or other possible safety hazards caused by current overload.

[0062] like Figure 6 As shown, this embodiment proposes a frequency converter 200, including a power unit 100. The power unit 100 plays a role in converting electric energy in the frequency converter 200, and is responsible for converting electric energy from a power source into an output of a specific frequency and voltage to drive a motor or other equipment.

[0063] Since the frequency converter includes a power unit, it has the beneficial effects of any power unit in the above-mentioned first aspect embodiment, which will not be described in detail here.

[0064] In a specific embodiment, a high-voltage inverter power unit is proposed, and the power unit includes: a control board, a box frame (i.e., a box), a left side plate, a right side plate, a capacitor frame (i.e., a frame body), a thin film capacitor, a main circuit laminated busbar (i.e., a circuit laminated busbar), a capacitor laminated busbar, a heat sink, a rectifier module, and an inverter IGBT module (i.e., a transistor module). The capacitor frame, the thin film capacitor, and the capacitor laminated busbar form a capacitor assembly. The heat sink, the control board, the rectifier module, the inverter IGBT module, and the main circuit laminated busbar are assembled to form a heat sink assembly. The input busbar and the output busbar are arranged on both sides of the heat sink, the input busbar is connected to the rectifier module, and the output busbar is connected to the inverter IGBT module. This solution is modularly installed, easy to assemble, convenient to maintain, and highly reliable.

[0065] Optionally, the control board is installed on the air outlet side of the radiator assembly; the air duct direction of the radiator is the front-to-back direction, the capacitor assembly is installed at the front lower end of the base, and the capacitor assembly is located on the air inlet side of the radiator.

[0066] The box frame is also provided with insulators and fuses.

[0067] The control panel is installed on the radiator assembly and is located on the air outlet side of the radiator. Handles are installed on the air inlet and outlet sides of the radiator for unit transportation.

[0068] The rectifier module is installed on the radiator, close to the air inlet side; the inverter IGBT module is installed on the radiator, close to the air outlet side; the main circuit laminated busbar is connected with the rectifier bridge module and the inverter IGBT module to achieve series connection.

[0069] The structure of the capacitor assembly is as follows: the film capacitor is installed in the capacitor frame, and the capacitor stack busbar is connected to the film capacitor to achieve parallel connection. There are handles on the left and right sides of the capacitor frame for carrying the capacitor assembly.

[0070] The main circuit laminated busbar on the radiator assembly and the capacitor laminated busbar on the capacitor assembly are overlapped on the left and right sides of the box to achieve electrical connection.

[0071] The power unit and the frequency converter provided by the utility model are installed in a modular manner, which reduces the difficulty of assembly, facilitates maintenance and has high reliability.

[0072] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0073] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0074] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0075] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power unit, characterized in that: include: Box; A radiator assembly is arranged on one side of the box in the height direction, and the radiator assembly includes a rectifier module and a transistor module; An input busbar is provided on one side of the box body, and the input busbar is electrically connected to the rectifier module; An output busbar is provided at the other side of the box body, and the output busbar is electrically connected to the transistor module; A capacitor assembly is disposed in the box, and the capacitor assembly is electrically connected to the radiator assembly; A control panel, arranged on the air outlet side of the radiator assembly; Wherein, the capacitor assembly is located on the air inlet side of the radiator assembly.

2. The power unit according to claim 1, characterized in that: The radiator assembly comprises: heat sink; The rectifier module is connected to the radiator, and the rectifier module is arranged on the air inlet side of the radiator; The transistor module is connected to the radiator, and the transistor module is arranged on the air outlet side of the radiator; The loop laminated busbar is connected in series with the rectifier module and the transistor module.

3. The power unit according to claim 2, characterized in that: The capacitor assembly comprises: A frame body is arranged in the box; A capacitor laminate busbar is arranged on the upper side of the frame body; The film capacitor is arranged in the frame body, and the capacitor stack busbar is electrically connected to each of the film capacitors.

4. The power unit according to claim 3, characterized in that: include: A handle is arranged on the frame body.

5. The power unit according to claim 3, characterized in that: The loop stack busbar of the radiator assembly is electrically connected to the capacitor stack busbar of the capacitor assembly.

6. The power unit according to claim 1, characterized in that: The input busbar and the output busbar are arranged on both sides of the box in a first direction, the box is provided with an opening in a second direction perpendicular to the first direction, and the box further comprises: a side panel detachably connected to the opening; The first direction, the second direction and the height direction are perpendicular to each other.

7. The power unit according to claim 1, characterized in that: include: The insulator is arranged on the same side of the box as the output busbar.

8. The power unit according to claim 1, characterized in that: include: A fuse is arranged on the same side of the box as the input busbar, and the fuse is connected in series with the input busbar.

9. A frequency converter, characterized in that: include: A power unit as claimed in any one of claims 1 to 8.

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