Drive module and frequency converter

Abstract

This utility model relates to a drive module and a frequency converter. The drive module, used to cooperate with a housing, includes a drive housing and a first circuit board disposed within the drive housing. A second circuit board is disposed within the housing. The housing has a first groove, and the drive housing has a pin that mates with the first groove. The first circuit board has a first connector, and the second circuit board has a second connector that mates with the first connector. The first connector and the pin are both located on a first side of the drive module, and the second connector and the first groove are both located on a second side of the housing, with the first side and the second side opposite to each other. This utility model, through a modular design of the drive unit, enables rapid positioning and installation of the drive module on the frequency converter, as well as rapid disassembly of the drive module.

Description

Technical Field

[0001] This utility model relates to the field of electromechanical engineering, and in particular to a drive module and a frequency converter. Background Technology

[0002] Currently, many devices with motors have a drive unit, and these devices are called frequency converters. The drive unit is the core component connecting the control circuit and power switching devices (such as IGBTs and MOSFETs). Its function is to amplify the control signal and convert it into a signal that can directly drive the power switching devices, thereby achieving precise control of the motor voltage and frequency.

[0003] In existing frequency converters, the electrical components in the drive unit are usually housed in the same enclosure as the electrical components of other parts of the frequency converter.

[0004] However, the drive units in existing frequency converters are not modularly designed, making the installation of related electrical components in the drive units inconvenient. Furthermore, these electrical components are among the most prone to failure in the frequency converter. Therefore, if a fault occurs in one of the drive unit's electrical components, repair is difficult, requiring the complete removal of all components from the frequency converter for inspection. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model discloses a drive module and a frequency converter, which modularly designs the drive unit to form a drive module, facilitating the rapid installation and disassembly of the drive module.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A drive module for cooperating with a housing, the drive module including a drive housing and a first circuit board disposed within the drive housing, and a second circuit board disposed within the housing; the housing has a first groove, and the drive housing has a pin that mates with the first groove; the first circuit board has a first connector, and the second circuit board has a second connector that mates with the first connector; the first connector and the pin are both disposed on a first side of the drive module, and the second connector and the first groove are both disposed on a second side of the housing, with the first side and the second side being opposite to each other.

[0008] Furthermore, a spring is provided in the first groove; when the pin engages with the first groove, the spring is located between the pin and the inner wall of the first groove, and the spring is compressed and deformed.

[0009] Furthermore, one of the first connector and the second connector is a first female connector and the other is a first male connector, and an adapter is connected between the first female connector and the first male connector.

[0010] Furthermore, one of the first connector and the second connector is a second female connector and the other is a second male connector. The second female connector and the second male connector cooperate with each other. The second female connector is provided with a second guide pin, and the second male connector is provided with a second guide groove that cooperates with the second guide pin.

[0011] Furthermore, the drive module also includes a third circuit board, which is disposed on the side of the first circuit board facing the second circuit board. The third circuit board is provided with a third connector, and the second circuit board is provided with a fourth connector that mates with the third connector. One of the first connector and the second connector is a first female connector and the other is a first male connector, and an adapter is connected between the first female connector and the first male connector. One of the third connector and the fourth connector is a second female connector and the other is a second male connector, and the second female connector mates with the second male connector.

[0012] Furthermore, the first male connector is provided with a first guide pin, and the adapter is provided with a first guide groove that mates with the first guide pin; the second female connector is provided with a second guide pin, and the second male connector is provided with a second guide groove that mates with the second guide pin.

[0013] Furthermore, the outer casing is provided with a boss on the second side, and the drive housing is provided with a second groove that mates with the boss, the second groove being provided on the first side.

[0014] Furthermore, a captive screw is provided on the first side of the drive housing, and a mounting hole for connecting with the captive screw is provided on the second side of the housing.

[0015] Furthermore, the radial cross-section of the pin is polygonal, and the pin has a pointed tip on the side away from the drive housing; the spring includes a tubular portion and a conical portion connected to the tubular portion, and the pointed tip enters the conical portion after passing through the tubular portion.

[0016] A frequency converter, comprising any of the drive modules described above.

[0017] Compared with the prior art, the advantages of this utility model are as follows: This utility model adopts a modular design of the drive unit to form a drive module. A pin is provided on the drive housing, and a first groove is provided on the outer shell. The first circuit board in the drive module is connected to a second circuit board located inside the outer shell via a connector. By positioning the pin and the first groove on opposite sides of the connector, the drive module can be quickly positioned and installed on the frequency converter, as well as quickly disassembled. Attached Figure Description

[0018] Figure 1 This is a first perspective view of the drive module and housing of this utility model;

[0019] Figure 2 This is a second perspective view of the drive module and housing of this utility model;

[0020] Figure 3 This is an installation diagram of the drive module and housing of this utility model;

[0021] Figure 4 This is a schematic diagram of the drive module structure of this utility model;

[0022] Figure 5 This is a schematic diagram showing the installation positions of the pins and springs after the drive module of this utility model is installed on the housing.

[0023] Figure 6 This is a structural schematic diagram of the first female connector, the adapter, and the first male connector of this utility model;

[0024] Figure 7 yes Figure 4 Enlarged diagram of section A in the middle;

[0025] Figure 8 This is a schematic diagram of the pin and spring of this utility model.

[0026] In the picture:

[0027] 1 – Outer shell; 2 – Drive housing; 3 – Pin; 4 – Spring; 4a – Tubular part; 4b – Conical part; 5 – First female connector; 6 – First male connector; 6a – First guide pin; 7 – Adapter; 7a – First guide groove; 8 – Second female connector; 8a – Second guide pin; 9 – Boss; 10 – Second groove; 11 – Lockable screw. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] This utility model discloses a drive module for use in frequency converters. Existing frequency converters consist of a housing, rectifier unit, filter unit, inverter unit, braking unit, drive unit, detection unit, and microprocessor unit. The drive unit is a vulnerable component in the frequency converter. This utility model integrates the relevant circuit boards of the drive unit and other vulnerable components into the drive module. The relevant circuit boards of the rectifier, filter, and other units in the frequency converter are located outside the drive module.

[0032] like Figures 1 to 4As shown, this utility model discloses a drive module for use with a housing 1. The drive module includes a drive housing 2 and a first circuit board disposed within the drive housing 2. The first circuit board is used to implement the corresponding functions of the drive unit. A second circuit board is disposed within the housing 1, and the second circuit board is used to implement the functions of rectification, filtering, and other units. A first groove is provided on the housing 1, and a pin 3 is provided on the drive housing 2 to cooperate with the first groove. A first connector is provided on the first circuit board, and a second connector is provided on the second circuit board to cooperate with the first connector. The first connector and the pin 3 are both disposed on the first side of the drive module, and the second connector and the first groove are both disposed on the second side of the housing 1, with the first side and the second side being opposite to each other.

[0033] During installation, when the drive module needs to be installed onto the housing 1, the pin 3 is aligned with the first groove, and the first connector and the second connector are aligned with each other. The pin 3 and the first groove, as well as the first connector and the second connector, provide positioning, thus enabling rapid positioning and installation of the drive module. After the housing 1 and the drive housing 2 are fitted together, bolts or clips can be used to secure them together. If any electrical component in the drive unit malfunctions, simply release the bolts or clips, and then separate the housing 1 and the drive housing 2 to complete the disassembly and assembly of the drive module.

[0034] In the drive module of this utility model, there are multiple connection methods for the plug-in connection between the first circuit board and the second circuit board. The following describes in detail the specific implementation methods of three independent plug-in connections using Embodiment 1, Embodiment 2, and Embodiment 3. Implementation methods other than Embodiment 1, Embodiment 2, and Embodiment 3 are referred to as other embodiments, which are briefly described below.

[0035] Example 1:

[0036] Example 1 mainly addresses the situation where, after the drive module is assembled with the housing 1, the distance between the first circuit board and the second circuit board is relatively large, as detailed below:

[0037] like Figure 4 and Figure 6As shown, one of the first connectors and the second connector is a first female connector 5, and the other is a first male connector 6. An adapter 7 connects the first female connector 5 and the first male connector 6. Because the distance between the first circuit board and the second circuit board is relatively large, if a taller first female connector 5 and first male connector 6 are used to connect the two circuit boards, deformation and damage may easily occur during the connection process. Therefore, this invention, through the adapter 7, adopts a three-segment connection method between the first female connector 5 and the first male connector 6, enhancing the connection stability and achieving a stable connection between the two distant circuit boards. Simultaneously, due to the adapter 7, shorter connectors can be used for the first female connector 5 and the first male connector 6, facilitating soldering and other operations on the first and second circuit boards.

[0038] Example 2:

[0039] Example 2 mainly addresses the situation where the distance between the first circuit board and the second circuit board is relatively short after the drive module is assembled with the housing 1, as detailed below:

[0040] like Figure 4 and Figure 7 As shown, one of the first connector and the second connector is a second female connector 8, and the other is a second male connector, which mate with each other. The second female connector 8 has a second guide pin 8a, and the second male connector has a second guide groove that mates with the second guide pin 8a. Because the distance between the first circuit board and the second circuit board is relatively short, in Embodiment 2, it is not necessary to provide an adapter 7 between the second female connector 8 and the second male connector as in Embodiment 1. Both the second female connector 8 and the second male connector can be relatively short connectors. In Embodiment 2, the second guide pin 8a and the second guide groove facilitate rapid positioning of the second female connector 8 and the second male connector.

[0041] Example 3:

[0042] Example 3 primarily addresses the scenario where the drive module also includes a third circuit board. This third circuit board is used to implement the corresponding functions of the control unit, and its failure probability is relatively high. Furthermore, when the drive module is assembled with housing 1, the first circuit board, third circuit board, and second circuit board are stacked sequentially, as detailed below:

[0043] like Figure 4 , Figure 6 and Figure 7As shown, the drive module also includes a third circuit board, which is located on the side of the first circuit board facing the second circuit board. Therefore, the distance between the first and second circuit boards is relatively large, while the distance between the third and second circuit boards is relatively small. The third circuit board has a third connector, and the second circuit board has a fourth connector that mates with the third connector. Because the distance between the first and second circuit boards is relatively large, one of the first and second connectors is designated as a first female connector 5, and the other as a first male connector 6. An adapter 7 connects the first female connector 5 and the first male connector 6, and the height of the first female connector 5 and the first male connector 6 does not need to be high. However, because the distance between the third and second circuit boards is relatively small, one of the third and fourth connectors is designated as a second female connector 8, and the other as a second male connector. The second female connector 8 mates with the second male connector, and the second female connector 8 and the second male connector are directly plugged in. This utility model further facilitates the maintenance of the frequency converter by also including the easily faulty third circuit board within the drive module.

[0044] Meanwhile, in Example 3, as Figure 6 As shown, the first male connector 6 is provided with a first guide pin 6a, and the adapter 7 is provided with a first guide groove 7a that mates with the first guide pin 6a. The second female connector 8 is provided with a second guide pin 8a, and the second male connector is provided with a second guide groove that mates with the second guide pin 8a. The first guide pin 6a and the second guide pin 8a allow both the first and third circuit boards to be quickly positioned with the second circuit board. In other embodiments, several positioning pins can be provided on the second circuit board, and positioning holes can be provided on both the first and third circuit boards, with positioning achieved through the engagement of the positioning pins and the positioning holes.

[0045] The following describes a series of technical features that can be implemented in Embodiment 1, Embodiment 2, and Embodiment 3, as detailed below:

[0046] In Examples 1, 2, and 3, as Figure 5 As shown, a spring 4 is provided in the first groove. When the pin 3 engages with the first groove, the spring 4 is located between the pin 3 and the inner wall of the first groove, and the spring 4 is compressed and deformed. This invention, through the provision of the spring 4, allows the drive module to separate from the housing 1 during the separation process. By releasing the bolts, clips, and other fixing mechanisms between the drive module and the housing 1, the spring 4 returns to its original shape. The rebound force of the spring 4 assists in the separation of the drive module from the housing 1, facilitating the removal of the drive module from the housing 1.

[0047] In Examples 1, 2, and 3, as Figure 8As shown, the radial cross-section of the pin 3 is polygonal; more specifically, it is hexagonal. The pin 3 has a pointed tip on the side away from the drive housing 2. The spring 4 includes a tubular portion 4a and a conical portion 4b connected to the tubular portion 4a. The pointed tip passes through the tubular portion 4a and enters the conical portion 4b. This invention, by defining the radial cross-section of the pin 3 as polygonal, provides more space for the spring 4 to compress and deform compared to a circular cross-section. Therefore, when the drive housing 2 is fitted with the outer shell 1, the spring 4 exerts a greater locking force on the pin 3, ensuring a stable connection between the drive housing 2 and the outer shell 1. Furthermore, by providing a pointed tip and a conical portion 4b on the pin 3, the pin 3 can quickly enter the first groove during the positioning and assembly process of the drive module. In other embodiments, the pin 3 can also be configured with an irregularly shaped sidewall surface, resulting in greater deformation of the spring 4 under compression.

[0048] In Examples 1, 2, and 3, as Figure 1 and Figure 4 As shown, the outer shell 1 has a boss 9 on the second side, and the drive housing 2 has a second groove 10 that mates with the boss 9, with the second groove 10 located on the first side. By providing the boss 9, this invention effectively creates a protrusion similar to a pin 3 on the outer shell 1. That is, the drive housing 2 and the outer shell 1 utilize two sets of protrusions and grooves in their engagement. In these two sets, the protrusions face opposite directions, facilitating faster positioning of the drive housing 2 and the outer shell 1. In other embodiments, the first side of the drive housing 2 can be configured as a V-shaped protrusion, and the second side of the outer shell 1 as a V-shaped recess. The engagement of the V-shaped protrusion and the V-shaped recess facilitates faster positioning of the drive housing 2 and the outer shell 1.

[0049] In Examples 1, 2, and 3, as Figure 2 and Figure 3 As shown, a captive screw 11 is provided on the first side of the drive housing 2, and a mounting hole for connecting the captive screw 11 is provided on the second side of the outer casing 1. Therefore, even after the drive module is separated from the outer casing 1, the captive screw 11 will not separate from the drive housing 2, thus improving the installation efficiency and ease of use of the drive module. In other embodiments, the connection between the drive housing 2 and the outer casing 1 can also be achieved using ordinary screws or snap-fit ​​connections.

[0050] This utility model also discloses a frequency converter that uses the drive module of this utility model. In the frequency converter of this utility model, the components inside the housing 1 also adopt a modular design. Specifically, the housing 1 and the second circuit board together form an electrical module. Other components in the frequency converter besides the drive module can also be designed independently. For example, the circuit board that realizes the wiring function can be set up as a separate module, and the circuit board that realizes the conversion function can also be set up as a separate module. The drive module is connected to one of the multiple modules through a first connector, a second connector, and positioning through a pin 3 and a first groove. The housing of the module connected to the drive module is the housing 1, but in this way, the overall size of the frequency converter is larger.

[0051] In summary, this utility model utilizes a modular design for the drive unit, placing the pin 3 and the first groove on opposite sides of the connector, enabling rapid positioning and installation of the drive module on the inverter, as well as rapid disassembly of the drive module. The adapter 7 ensures stable connection when the first and second circuit boards are far apart, and facilitates soldering operations on both boards. The second guide pin 8a and the second guide groove facilitate rapid positioning of the second female connector 8 and the second male connector. Including the faulty third circuit board within the drive module further facilitates inverter maintenance. The first guide pin 6a and the second guide pin 8a allow for rapid positioning of both the first and third circuit boards with the second circuit board. The spring 4 facilitates removal of the drive module from the housing 1. The polygonal radial cross-section of the pin 3 and the spring 4, including a tubular portion 4a and a conical portion 4b connected to the tubular portion 4a, allow the pin 3 to quickly enter the first groove, increasing the locking force once inside. The boss 9 and the second groove 10 facilitate the quick positioning of the drive housing 2 and the outer shell 1. The captive screw 11 facilitates the assembly of the drive module.

[0052] It should be emphasized that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A drive module for cooperation with a housing (1), characterized in that The drive module includes a drive housing (2) and a first circuit board disposed inside the drive housing (2), and a second circuit board disposed inside the outer shell (1); The outer shell (1) is provided with a first groove, and the drive housing (2) is provided with a pin (3) that cooperates with the first groove; The first circuit board is provided with a first connector, and the second circuit board is provided with a second connector that cooperates with the first connector; The first connector and the pin (3) are both disposed on the first side of the drive module, and the second connector and the first groove are both disposed on the second side of the housing (1). The first side and the second side are disposed opposite to each other.

2. The driving module according to claim 1, wherein, A spring (4) is provided in the first groove; when the pin (3) is engaged with the first groove, the spring (4) is located between the pin (3) and the inner wall of the first groove, and the spring (4) is compressed and deformed.

3. The driving module according to claim 1, wherein, One of the first connector and the second connector is a first female connector (5) and the other is a first male connector (6), and an adapter (7) is connected between the first female connector (5) and the first male connector (6).

4. The driving module of claim 1, wherein, One of the first connector and the second connector is a second female connector (8) and the other is a second male connector. The second female connector (8) and the second male connector cooperate with each other. The second female connector (8) is provided with a second guide pin (8a) and the second male connector is provided with a second guide groove that cooperates with the second guide pin (8a).

5. The driving module of claim 1, wherein, The drive module further includes a third circuit board, which is disposed on the side of the first circuit board facing the second circuit board; the third circuit board is provided with a third connector, and the second circuit board is provided with a fourth connector that cooperates with the third connector; one of the first connector and the second connector is a first female connector (5), and the other is a first male connector (6), and an adapter (7) is connected between the first female connector (5) and the first male connector (6); one of the third connector and the fourth connector is a second female connector (8), and the other is a second male connector, and the second female connector (8) cooperates with the second male connector.

6. The drive module of claim 5, wherein, The first male plug (6) is provided with a first guide pin (6a), and the adapter (7) is provided with a first guide groove (7a) that cooperates with the first guide pin (6a); the second female plug (8) is provided with a second guide pin (8a), and the second male plug is provided with a second guide groove that cooperates with the second guide pin (8a).

7. The driving module of claim 1, wherein, The outer shell (1) is provided with a boss (9) on the second side, and the drive housing (2) is provided with a second groove (10) that cooperates with the boss (9). The second groove (10) is provided on the first side.

8. The driving module of claim 1, wherein, The drive housing (2) is provided with a captive screw (11) on the first side, and the outer shell (1) is provided with a mounting hole for connecting with the captive screw (11) on the second side.

9. The driving module of claim 2, wherein, The radial cross-section of the pin (3) is polygonal, and the pin (3) has a tip on the side away from the drive housing (2); the spring (4) includes a tubular part (4a) and a conical part (4b) connected to the tubular part (4a), and the tip enters the conical part (4b) after passing through the tubular part (4a).

10. A frequency converter, characterized in that Includes the drive module described in any of claims 1 to 9.

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