Variable frequency direct drive integrated machine

Abstract

The application discloses a variable-frequency direct-drive integrated machine, which comprises a driving module and a voltage transformation module, wherein the voltage transformation module is connected with the driving module, the output end of the voltage transformation module is electrically connected with the driving module, and the voltage transformation module is used for adjusting the input voltage of the driving module; a variable-frequency module is further arranged on the driving module, the variable-frequency module is electrically connected with the driving module and the voltage transformation module respectively, and the variable-frequency module is used for adjusting the rotating speed of the driving module; the voltage transformation module and the variable-frequency module are integrated on the basis of the driving module, the input voltage is adjusted through the voltage transformation module, compared with the prior art, the transformer is no longer arranged separately, the structure of the equipment is simplified, and the increase of the equipment cost caused by the additional transformer is avoided.

Description

Technical Field

[0001] This application relates to the field of motor equipment technology, specifically to a variable frequency direct drive integrated machine. Background Technology

[0002] Currently, port equipment is mainly driven by frequency converters. However, a bulky reducer is often used to connect the converter to the belt pulleys of the port equipment in order to control the speed of the belt pulleys. Although direct-drive frequency converters have been applied in the existing technology, their voltage level is often too low to reach the required 10KV high voltage level. Therefore, the power supply of the converter often needs to be achieved through a supporting substation, which not only has high installation and maintenance costs, but also has a complex equipment structure, which is not conducive to reducing equipment costs. Utility Model Content

[0003] The main purpose of this application is to provide an integrated variable frequency direct drive machine, which aims to solve the defects of complex structure and high cost of use in the existing technology.

[0004] This application achieves the above objectives through the following technical solutions:

[0005] A variable frequency direct drive integrated machine includes a drive module;

[0006] A transformer module is connected to the drive module, and the output terminal of the transformer module is electrically connected to the drive module. The transformer module is used to adjust the input voltage of the drive module.

[0007] A frequency converter module is connected to the drive module and is electrically connected to both the drive module and the transformer module. The frequency converter module is used to adjust the speed of the drive module.

[0008] Optionally, the drive module includes a drive motor, on which a rotary transformer is provided for detecting its rotational speed.

[0009] Optionally, the transformer module includes a housing, a transformer, and a transformer junction box. The transformer is disposed inside the housing, and the housing is connected to the transformer junction box. The transformer junction box is provided with wiring terminals.

[0010] Optionally, a cooling fan is also installed inside the housing to reduce the temperature of the transformer.

[0011] Optionally, the housing is provided with a first cover plate, a second cover plate and a third cover plate. The first cover plate is fixedly connected to the housing. The second cover plate is connected to the housing by a hinge. A number of fixing screws are also provided between the second cover plate and the housing. The third cover plate is connected to the housing by a hinge. A number of fixing screws are also provided between the third cover plate and the housing.

[0012] Optionally, the frequency conversion module includes a frequency conversion box, in which a frequency converter is installed, and a frequency conversion junction box for connecting external cables is also provided on the frequency conversion box; a number of through holes for passing internal cables are also provided between the housing and the frequency conversion box.

[0013] Optionally, the inverter box is also equipped with a water-cooled plate to reduce the operating temperature of the inverter.

[0014] Optionally, the frequency converter box is provided with a fourth cover plate and a fifth cover plate. The fourth cover plate is connected to the frequency converter box by a hinge, and a number of fixing screws are also provided between the fourth cover plate and the frequency converter box. The fifth cover plate is connected to the frequency converter box by a hinge, and a number of fixing screws are also provided between the fifth cover plate and the frequency converter box.

[0015] Optionally, the direct drive integrated unit also includes a protective cover that shields the transformer module and the frequency converter module.

[0016] Optionally, both the housing and the top of the inverter box are provided with limit strips, and the protective cover is plugged into the limit strips; the protective cover is also provided with several fixing screws connected to the limit strips.

[0017] Compared with the prior art, this application has the following beneficial effects:

[0018] This application includes a drive module and a transformer module. The transformer module is connected to the drive module, and its output terminal is electrically connected to the drive module. The transformer module is used to adjust the input voltage of the drive module. The drive module is also equipped with a frequency converter module, which is electrically connected to both the drive module and the transformer module. The frequency converter module is used to adjust the rotational speed of the drive module.

[0019] This application integrates a transformer module and a frequency converter module on the basis of the drive module. The transformer module is used to regulate the input voltage. Compared with the prior art, this application no longer requires a separate transformer, which not only simplifies the structure of the equipment, but also avoids the increase in equipment cost caused by adding an extra transformer. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an inverter direct drive integrated machine provided in an embodiment of this application;

[0021] Figure 2 An exploded view of an integrated inverter direct drive machine provided in an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the driver module.

[0023] Figure 4 This is a schematic diagram of the transformer module.

[0024] Figure 5 This is a front view of the transformer module;

[0025] Figure 6 This is a schematic diagram of the inverter module.

[0026] Figure 7 This is a schematic diagram of the internal structure of the frequency converter module;

[0027] Figure 8 This is a diagram showing the internal structure of the transformer junction box;

[0028] Reference numerals: 1-Drive module, 2-Transformer module, 3-Variable frequency module, 4-Hinge, 5-Wire hole, 6-Protective cover, 7-Limit strip, 101-Drive motor, 102-Rotary transformer, 201-Housing, 202-Transformer, 203-Transformer junction box, 204-Terminal, 205-Cooling fan, 206-First cover plate, 207-Second cover plate, 208-Third cover plate, 209-10KV high voltage terminal, 210-Transformer inlet, 211-Transformer outlet, 301-Variable frequency box, 302-Variable frequency drive, 303-Variable frequency junction box, 304-Water cooling plate, 305-Fourth cover plate, 306-Fifth cover plate.

[0029] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions. Taking "robot coordinate system and / or m" as an example, it includes a robot coordinate system solution, an m solution, or a solution where both the robot coordinate system and m are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0034] Implementation method 1:

[0035] Reference Figures 1 to 7 This embodiment, as another optional embodiment of this application, discloses a variable frequency direct drive integrated machine, including a drive module 1, a transformer module 2 and a variable frequency module 3. The drive module 1 includes a drive motor 101 and a rotary transformer 102. The rotary transformer 102 is installed on the end face of the drive motor 101 to detect the speed of the drive motor 101.

[0036] The transformer module 2 includes a housing 201, a transformer 202, and a transformer junction box 203. The housing 201 is generally cylindrical and has a cavity along its axis. The transformer 202 is disposed in the cavity of the housing 201. The housing 201 is connected to the transformer junction box 203. The transformer junction box 203 is provided with a terminal block 204 for connecting an external mains cable.

[0037] It should be noted that, in order to meet the requirement of limited housing volume, the transformer described in this application is a customized transformer, and the transformer in this application is preferably a three-phase dry-type transformer for a substation.

[0038] Furthermore, a cooling fan 205 is also installed inside the cavity of the housing 201. The cooling fan 205 is located directly below the transformer 202. During actual operation, if the temperature of the transformer 202 is too high, the cooling fan 205 will start and blow out the hot air inside the transformer 202. Because the cooling fan 205 blows air upwards, circulating air is formed on both sides of the housing 201, which exchanges the heat at the upper end and the lower end of the transformer 202 inside the housing 201, balancing the temperature on both sides of the cavity. At the same time, due to the flow of hot air inside the cavity, the housing 201 can also absorb heat from the cavity to a certain extent, and then dissipate the heat to the outside air through thermal radiation and thermal convection, thereby reducing the temperature of the transformer 202 and ensuring the normal operation of the transformer 202.

[0039] Furthermore, a first cover plate 206, a second cover plate 207 and a third cover plate 208 are provided on the housing 201. Along the axial direction of the housing 201, the first cover plate 206 is provided at one end of the housing 201 and is fixedly connected to the housing 201 by a plurality of fastening screws.

[0040] The second cover plate 207 is hinged to the housing 201 via a hinge 4, and a plurality of fixing screws are also provided between the second cover plate 207 and the housing 201; the third cover plate 208 is hinged to the housing 201 via a hinge 4, and a plurality of fixing screws are also provided between the third cover plate 208 and the housing 201; sealing rings are provided between the first cover plate 206, the second cover plate 207, and the third cover plate 208 and the housing 201 to improve the sealing performance of the equipment;

[0041] The second cover plate 207 and the third cover plate 208 are connected to the housing 201 by a hinge 4, which makes it convenient for staff to open the second cover plate 207 and the third cover plate 208, thereby improving the convenience of equipment maintenance.

[0042] Furthermore, along the axial direction of the drive motor 101, the transformer module 2 is disposed at one end of the drive motor 101, the housing 201 is tightly fitted to the outer shell of the drive motor 101, and is fixedly connected by connecting bolts; a sealing ring is also provided between the housing 201 and the drive motor 101.

[0043] Furthermore, the frequency converter module 3 includes a frequency converter box 301, in which a frequency converter 302 is installed. The frequency converter box 301 is also provided with a frequency converter junction box 303 for connecting external cables. At the same time, a plurality of wire holes 5 are provided between the housing 201 and the frequency converter box 301. The wire holes are used to pass through the connecting cables between the frequency converter 302 and the transformer 202.

[0044] Furthermore, a water-cooled plate 304 is also provided on the frequency converter box 301 to reduce the temperature inside the frequency converter box 301 and ensure the stable operation of the frequency converter 302.

[0045] Furthermore, the frequency converter box 301 is provided with a fourth cover plate 305 and a fifth cover plate 306. The fourth cover plate 305 is hinged to the frequency converter box 301 via a hinge 4, and a number of fixing screws are also provided between the fourth cover plate 305 and the frequency converter box 301. The fifth cover plate 306 is hinged to the frequency converter box 301 via a hinge 4, and a number of fixing screws are also provided between the fifth cover plate 306 and the frequency converter box 301.

[0046] A sealing ring is provided between the fourth cover plate 305 and the frequency converter box 301, and between the fifth cover plate 306 and the frequency converter box 301;

[0047] Along the axial direction of the drive motor 101, the frequency converter 301 is disposed on one side of the drive motor 101, and the frequency converter 301 is connected to the drive motor 101 by bolts;

[0048] The cooling water plate is equipped with inlet and outlet ports, which are connected to an external cooling water tank. The heat generated by the inverter is transferred to the cooling water plate, which then transfers the heat to the internal circulating cooling water. The cooling water circulation carries away the heat, thereby cooling the inverter.

[0049] Furthermore, the direct drive integrated machine also includes a protective cover 6, and the top of both the housing 201 and the inverter box 301 are provided with limit strips 7, and the two limit strips 7 are spliced ​​along the axial direction of the drive motor 101.

[0050] The bottom of the protective cover 6 is provided with a limiting groove that is adapted to the limiting strip 7. The limiting strip 7 is inserted into the limiting groove, thereby connecting the protective cover 6 and the limiting strip 7. The protective cover 6 is also provided with a number of fixing screws that are connected to the limiting strip 7.

[0051] The housing 201 and the frequency converter box 301 are both located directly below the protective cover 6;

[0052] Furthermore, refer to Figure 8The housing is provided with a wiring terminal 204, which is used to connect to the 10KV high-voltage line of the mains. At the same time, a 10KV high-voltage wiring terminal is also provided inside the housing. The connected mains line is connected to the 10KV high-voltage wiring terminal 209. After being controlled by a high-voltage contactor and protected by a fuse, the cable enters from the transformer inlet 210 on the housing and connects to the input terminal on the transformer. The output cable of the transformer 202 enters the frequency converter cavity through the transformer outlet 211 and the wire hole on the housing to supply power to the frequency converter module as the input power of the frequency converter.

[0053] The frequency converter adopts mature AC-DC-AC frequency converter technology. The low-voltage AC power output from the transformer is converted into DC power by the rectifier module of the frequency converter section, and then converted into AC power with adjustable frequency by the inverter module of the frequency converter section to provide power input for the motor. The output speed of the drive motor is adjusted by adjusting the frequency.

[0054] The frequency converter uses vector control. The rotary transformer can detect the speed and position signals of the motor shaft and transmit them to the frequency converter control module to more accurately control the speed of the drive motor and thus control the output torque of the drive motor. The rotary transformer is a commercially available reluctance rotary transformer.

[0055] This application integrates a transformer module and a frequency converter module on the basis of the drive module. The transformer module is used to regulate the input voltage. Compared with the prior art, this application no longer requires a separate transformer, which not only simplifies the structure of the equipment, but also avoids the increase in equipment cost caused by adding an extra transformer.

[0056] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A variable frequency direct drive integrated machine, characterized in that, Includes driver module (1); A transformer module (2) is connected to the drive module (1). The output terminal of the transformer module (2) is electrically connected to the drive module (1). The transformer module (2) is used to adjust the input voltage of the drive module (1). The frequency converter (3) is connected to the drive module (1). The frequency converter (3) is electrically connected to the drive module (1) and the transformer module (2) respectively. The frequency converter (3) is used to adjust the speed of the drive module (1).

2. The variable frequency direct drive integrated machine according to claim 1, characterized in that, The drive module (1) includes a drive motor (101), and the drive motor (101) is provided with a rotary transformer (102) for detecting its rotational speed.

3. The variable frequency direct drive integrated machine according to claim 1, characterized in that, The transformer module (2) includes a housing (201), a transformer (202) and a transformer junction box (203). The transformer (202) is disposed inside the housing (201). The housing (201) is connected to the transformer junction box (203). The transformer junction box (203) is provided with terminals (204).

4. The variable frequency direct drive integrated machine according to claim 3, characterized in that, The housing (201) is also equipped with a cooling fan (205) for reducing the temperature of the transformer (202).

5. The variable frequency direct drive integrated machine according to claim 4, characterized in that, The housing (201) is provided with a first cover plate (206), a second cover plate (207) and a third cover plate (208). The first cover plate (206) is fixedly connected to the housing (201). The second cover plate (207) is hinged to the housing (201) via a hinge (4). Several fixing screws are also provided between the second cover plate (207) and the housing (201). The third cover plate (208) is hinged to the housing (201) via a hinge (4). Several fixing screws are also provided between the third cover plate (208) and the housing (201).

6. The variable frequency direct drive integrated machine according to claim 3, characterized in that, The frequency conversion module (3) includes a frequency conversion box (301), a frequency converter (302) is provided inside the frequency conversion box (301), and a frequency conversion junction box (303) for connecting external cables is also provided on the frequency conversion box (301); a number of through holes (5) for passing internal cables are also provided between the housing (201) and the frequency conversion box (301).

7. The variable frequency direct drive integrated machine according to claim 6, characterized in that, The inverter box (301) is also equipped with a water-cooled plate (304) for reducing the operating temperature of the inverter (302).

8. The variable frequency direct drive integrated machine according to claim 7, characterized in that, The frequency converter box (301) is provided with a fourth cover plate (305) and a fifth cover plate (306). The fourth cover plate (305) is hinged to the frequency converter box (301) via a hinge (4), and a number of fixing screws are also provided between the fourth cover plate (305) and the frequency converter box (301). The fifth cover plate (306) is hinged to the frequency converter box (301) via a hinge (4), and a number of fixing screws are also provided between the fifth cover plate (306) and the frequency converter box (301).

9. A variable frequency direct drive integrated machine according to claim 6, characterized in that, The direct drive integrated machine also includes a protective cover (6) that shields the transformer module (2) and the frequency converter module (3).

10. A variable frequency direct drive integrated machine according to claim 9, characterized in that, The top of the housing (201) and the frequency converter box (301) are provided with limit strips (7), and the protective cover (6) is connected to the limit strips (7) by insertion; the protective cover (6) is also provided with a number of fixing screws connected to the limit strips (7).

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