Variable frequency motor all-in-one machine

Abstract

The invention discloses a variable frequency motor all-in-one machine, which comprises a substrate, a motor, a transformer, a cabinet body and a cooling fan, and is characterized in that the motor is mounted on the substrate; the transformer is mounted on the substrate and adjacent to the motor, and the transformer comprises an air duct and a coil arranged in the air duct; the cabinet body comprises a voltage transformation cabinet and a power cabinet, the voltage transformation cabinet is installed on the substrate and internally provided with a first cavity to accommodate a transformer, the power cabinet is located above the motor and provided with a second cavity communicated with the first cavity, and the cabinet body is provided with a first air opening communicated with the first cavity and a second air opening communicated with the second cavity; the cooling fan is located in the first cavity and corresponds to the first air opening, and the power cabinet is located above the motor, so that the size of the whole machine is greatly reduced compared with the size of a traditional motor and a frequency converter, the cooling fan located in the first cavity and corresponds to the first air opening drives air to circulate for heat dissipation, and the transformer cabinet and the power cabinet use air channels connected in series. Forced air cooling heat dissipation is achieved, and high integration is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of variable frequency motor cabinets, and in particular to a variable frequency motor integrated machine. Background Art

[0002] The existing combination of traditional motors and general-purpose inverters is large in size and low in power density. The inverter requires an independent installation space, and cables must be laid between the motor and the inverter and wiring grooves must be set, which is costly and occupies a large area. In addition, the existing variable-frequency high-voltage integrated machine usually requires additional water cooling equipment to facilitate the heat dissipation of the inverter, which occupies a large space. At the same time, the shell of the integrated machine is cast and welded, and is formed in one piece, so it has low versatility.

[0003] Therefore, how to provide a variable frequency motor integrated machine to at least partially solve the above-mentioned drawbacks is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0004] The purpose of the present invention is to provide an all-in-one variable frequency motor, which can greatly reduce the size of the whole machine compared with the volume of a traditional motor plus a frequency converter. The transformer cabinet and the power cabinet use series air ducts, forced air cooling and heat dissipation, and are highly integrated. There is no need to be equipped with derivative equipment such as a water-cooled external unit, thus avoiding the water-cooling equipment from occupying a large space.

[0005] To achieve the above object, the present invention provides a variable frequency motor integrated machine, comprising:

[0006] substrate;

[0007] A motor is mounted on a base plate;

[0008] A transformer is installed on the base plate and adjacent to the motor, and the transformer includes an air duct and a coil arranged inside the air duct;

[0009] The cabinet includes a transformer cabinet and a power cabinet, wherein the transformer cabinet is mounted on the base plate and has a first chamber inside to accommodate the transformer, the power cabinet is located above the motor, and the power cabinet has a second chamber connected to the first chamber, and the cabinet has a first air outlet connected to the first chamber and a second air outlet connected to the second chamber;

[0010] The heat dissipation fan is located in the first chamber and corresponds to the first air outlet.

[0011] Preferably, a sealing plate is provided inside the transformer cabinet to divide the first chamber into an upper first air duct chamber and a lower second air duct chamber, the sealing plate is provided with a first ventilation hole connected to the first air duct chamber and the second air duct chamber, the cooling fan is arranged on the sealing plate and located in the first air duct chamber, the cooling fan is used to generate a negative pressure environment to guide the air in the second air duct chamber to flow to the first air duct chamber and then be discharged along the first air outlet.

[0012] Preferably, a mounting plate is provided inside the second chamber to divide the second chamber into an upper mounting chamber and a lower third air duct chamber, the mounting plate is provided with a through hole, and the second chamber includes a core connected to the mounting plate and located in the mounting chamber, and a radiator connected to the core and extending into the third air duct chamber through the through hole.

[0013] Preferably, the second air outlet is connected to the third air duct cavity, the power cabinet is provided with a second ventilation hole, and the second ventilation hole is connected to the third air duct cavity and the second air duct cavity, so that the air entering the third air duct cavity through the second air outlet can flow to the second air duct cavity.

[0014] Preferably, the second ventilation hole is located at a height higher than the top of the air guide cylinder.

[0015] Preferably, a horizontally extending extension section is provided around the bottom of the transformer cabinet, a plurality of first mounting holes are provided on the extension section, a plurality of second mounting holes corresponding to the first mounting holes are provided on the base plate, and fixing parts are passed through the first mounting holes and the second mounting holes for detachable connection between the transformer cabinet and the base plate.

[0016] Preferably, a first flange is provided on the top of the motor, a second flange is provided on the bottom of the power cabinet, and a connecting piece is passed through the first flange and the second flange to fix the power cabinet on the top of the motor.

[0017] Preferably, a third flange is provided at the bottom of the motor, and the third flange is used to be locked with the base plate.

[0018] Preferably, a support member is provided between the motor and the substrate, and the support member is used to adjust the distance between the rotating shaft of the motor and the substrate.

[0019] Preferably, a ground foot is provided at the bottom of the transformer, and the ground foot is detachably connected to the base plate.

[0020] Compared with the above-mentioned background technology, the variable frequency motor integrated machine provided by the present invention includes a substrate, a motor, a transformer, a cabinet and a cooling fan, the motor is installed on the substrate; the transformer is installed on the substrate and is adjacent to the motor, the transformer includes an air duct and a coil arranged inside the air duct; the cabinet includes a transformer cabinet and a power cabinet, the transformer cabinet is installed on the substrate and is provided with a first chamber inside to accommodate the transformer, the power cabinet is located above the motor, and the power cabinet is provided with a second chamber connected to the first chamber, the cabinet is provided with a first air outlet connected to the first chamber and a second air outlet connected to the second chamber; the cooling fan is located in the first chamber and corresponds to the first air outlet.

[0021] Specifically, the motor and transformer are arranged adjacent to each other on a substrate, and then a cabinet containing a transformer cabinet and a power cabinet is inserted from above. The transformer cabinet accommodates the transformer, and the power cabinet is located above the motor, so that the size of the whole machine is greatly reduced compared with the volume of a traditional motor plus an inverter. The first chamber and the second chamber are connected, and the first chamber is provided with a first air outlet, and the second chamber is provided with a second air outlet. The cooling fan located in the first chamber and corresponding to the first air outlet drives air circulation for heat dissipation. The transformer cabinet and the power cabinet use series air ducts, forced air cooling and high integration, without the need to be equipped with derivative equipment such as a water-cooled external unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 An exploded diagram of a variable frequency motor integrated machine provided by an embodiment of the present invention;

[0024] Figure 2 A front view of a variable frequency motor integrated machine provided by an embodiment of the present invention;

[0025] Figure 3 A cross-sectional view of a variable frequency motor integrated machine provided by an embodiment of the present invention;

[0026] Figure 4 A schematic structural diagram of a substrate provided in an embodiment of the present invention.

[0027] in:

[0028] 1-motor, 2-power cabinet, 3-radiator, 4-core, 5-cooling fan, 6-transformer cabinet, 7-transformer, 8-base plate, 9-third air duct cavity, 10-sealing plate, 11-first air outlet, 12-second air outlet. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "top", "bottom", "inside" and "outside" etc. indicate orientations or positional relationships based on the orientations 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 position or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation of the present invention.

[0032] The purpose of the present invention is to provide an all-in-one variable frequency motor, which can greatly reduce the size of the whole machine compared to the volume of a traditional motor plus a frequency converter. The transformer cabinet 6 and the power cabinet 2 use series air ducts, forced air cooling and heat dissipation, and are highly integrated. There is no need to be equipped with derivative equipment such as a water-cooled external unit, thus avoiding the water-cooling equipment from occupying a large space.

[0033] See also Figure 1 and Figure 4 To achieve the above-mentioned purpose, the present invention provides a variable frequency motor 1 integrated machine, including a substrate 8, a motor 1, a transformer 7, a cabinet and a cooling fan 5.

[0034] The motor 1 is mounted on a substrate 8, wherein the substrate 8 is a square plate-like structure, and is provided with a first opening and a second opening adjacent to each other, and the first opening and the second opening are located below the motor 1, thereby increasing the contact area between the air and the outer casing of the motor 1 for heat transfer during the operation of the motor 1 and for better heat dissipation. At the same time, it can save the material usage of the substrate 8, reduce the weight of the entire substrate 8, and facilitate subsequent transportation and installation.

[0035] It should be noted that the first opening and the second opening can be square openings to increase the cross-sectional dimensions of the first opening and the second opening. Preferably, the length of the second opening in the length direction of the plate body is twice the length of the first opening in the length direction of the plate body, and the first opening is located between the second opening and the following support legs. The motor 1 can be a permanent magnet motor 1. The type of motor 1, the shape and size of the first opening and the second opening can be selected according to actual needs as long as the above-mentioned purpose can be achieved.

[0036] The transformer 7 is mounted on the base plate 8 and is adjacent to the motor 1 . The transformer 7 includes an air duct and a coil arranged inside the air duct. A foot is provided at the bottom of the transformer 7 , and the foot is detachably connected to the base plate 8 .

[0037] Furthermore, the ground pins include a horizontal plate parallel to the base plate 8 and two vertical plates arranged on the horizontal plate. The two vertical plates are arranged in parallel and perpendicular to the horizontal plate to support the bottom of the coil. Fixing holes are provided at both ends of the horizontal plate to fit the horizontal plate to the base plate 8 for installation and positioning. The installation method can be threaded connection, etc. The number of ground pins corresponds to the number of coils one by one.

[0038] A small square hole is provided on the top of the air duct for subsequent connection of the wiring terminal of the transformer 7 with the cable.

[0039] See also Figure 2 The cabinet includes a transformer cabinet 6 and a power cabinet 2. The transformer cabinet 6 is installed on a substrate 8 and is provided with a first chamber inside to accommodate a transformer 7. The power cabinet 2 is located above the motor 1, and the power cabinet 2 is provided with a second chamber connected to the first chamber. The cabinet is provided with a first air outlet 11 connected to the first chamber and a second air outlet 12 connected to the second chamber.

[0040] The overall structure of the cabinet is an "L" rotated 90° clockwise. Through the "I"-shaped power cabinet 2 and the "I"-shaped transformer cabinet 6 contained in the "L"-shaped cabinet, the installed cabinet and the motor 1 can be a square structure to form a high-performance compact high-voltage integrated machine.

[0041] The cooling fan 5 is located in the first chamber and corresponds to the first air outlet 11 .

[0042] The motor 1 and the transformer 7 are arranged adjacent to each other on the base plate 8, and then a cabinet body including a transformer cabinet 6 and a power cabinet 2 is inserted from above. The transformer cabinet 6 accommodates the transformer 7, and the power cabinet 2 is located above the motor 1, so that the size of the whole machine is greatly reduced compared with the volume of the traditional motor 1 plus the inverter. The first chamber and the second chamber are connected, the first chamber is provided with a first air outlet 11, and the second chamber is provided with a second air outlet 12. The cooling fan 5 located in the first chamber and corresponding to the first air outlet 11 drives air circulation for heat dissipation. The transformer cabinet 6 and the power cabinet 2 use series air ducts, forced air cooling and heat dissipation, and are highly integrated, without the need to be equipped with derivative equipment such as a water-cooled external machine.

[0043] See also Figure 3 In this embodiment, a sealing plate 10 is provided inside the transformer cabinet 6 to divide the first chamber into an upper first air duct chamber and a lower second air duct chamber. The sealing plate 10 is provided with a first ventilation hole connected to the first air duct chamber and the second air duct chamber. The heat dissipation fan 5 is arranged on the sealing plate 10 and is located in the first air duct chamber. The heat dissipation fan 5 is used to generate a negative pressure environment to guide the air in the second air duct chamber to flow to the first air duct chamber and then be discharged along the first air outlet 11.

[0044] The number of the cooling fans 5 and the first ventilation holes corresponds one to one, and the central axes of the corresponding cooling fans 5 and the first ventilation holes are consistent, so that the first ventilation holes serve as the air inlet of the cooling fans 5. When the cooling fans 5 are started, a negative pressure environment is formed at the first ventilation holes, so that the air inside the cabinet flows to the first ventilation holes and is enriched at the first ventilation holes, so as to improve the exhaust efficiency of the cooling fans 5 and facilitate new air to enter the cabinet for subsequent air cooling processes. The use of forced air cooling can avoid the installation space of on-site water cooling equipment, and there is no need to consider the on-site installation environment, and it can be flexibly applied to various usage sites.

[0045] The first ventilation hole can be set as a circular hole, and the first ventilation hole can be set as a flared structure to increase the cross-sectional size of one end of the first ventilation hole close to the second air duct cavity to facilitate air to enter the heat dissipation fan 5.

[0046] In addition, a mounting plate is provided inside the second chamber to divide the second chamber into an upper mounting chamber and a lower third air duct chamber 9, the mounting plate is provided with a through hole, and the second chamber includes a core 4 connected to the mounting plate and located in the mounting chamber, and a radiator 3 connected to the core 4 and extending into the third air duct chamber 9 through the through hole.

[0047] The second air outlet 12 is connected to the third air duct cavity 9. The power cabinet 2 is provided with a second ventilation hole. The second ventilation hole is connected to the third air duct cavity 9 and the second air duct cavity, so that the air entering the third air duct cavity 9 through the second air outlet 12 can flow to the second air duct cavity.

[0048] The radiator 3 absorbs the heat of the core 4 and dissipates the heat of the radiator 3 by circulating air along the second air outlet 12 into the third air duct cavity 9. The negative pressure environment formed by the first ventilation hole can guide the air to flow to the first ventilation hole, and then be discharged to the outside of the cabinet through the cooling fan 5 and the first air outlet 11.

[0049] The bottom of the radiator 3 is opposite to the second air outlet 12 to improve the heat dissipation effect of the radiator 3. Both the first air outlet 11 and the second air outlet 12 can adopt shutters, and dust filters can be installed in the shutters to prevent external dust from being sucked into the cabinet.

[0050] A controller may be provided to control the operation of the cooling fan 5. When the temperature in the third air duct cavity 9 and the second air duct cavity is higher than a preset value (for example, 38°), the controller controls the cooling fan 5 to operate for air cooling. When the temperature in the third air duct cavity 9 and the second air duct cavity is lower than a preset value (for example, 30°), the controller controls the cooling fan 5 to suspend operation to save energy consumption.

[0051] It should be noted that the height of the second ventilation hole is higher than the height of the top of the air guide tube, so that the air entering the third air duct cavity 9 through the second ventilation hole moves to the top of the coil, which is convenient for timely discharge of hot air.

[0052] In some embodiments, a horizontally extending extension section is provided around the bottom of the transformer cabinet 6, and a plurality of first mounting holes are provided on the extension section. The base plate 8 is provided with a plurality of second mounting holes corresponding to the first mounting holes. The fixing parts are passed through the first mounting holes and the second mounting holes for detachable connection between the transformer cabinet 6 and the base plate 8.

[0053] The transformer cabinet 6 and the base plate 8 may also be connected by welding or the like, as long as the above-mentioned purpose can be achieved.

[0054] It should be noted that a rectangular opening is also provided on the transformer cabinet 6, and the rectangular opening is located below the first air outlet 11. The rectangular opening includes an upper rectangular opening and a lower rectangular opening arranged up and down. The upper rectangular opening corresponds to the small square hole at the top of the air guide tube. The upper rectangular opening and the lower rectangular opening are provided with seals, and the seals are detachably sealed to the rectangular openings by screws.

[0055] The upper rectangular opening can be used for wiring of the transformer 7. When wiring of the transformer 7 is required, the seal is removed. After wiring of the transformer 7 is completed, the seal can be installed. The lower rectangular opening is convenient for the operator to check whether the ground feet are loose.

[0056] A first flange is provided on the top of the motor 1 , a second flange is provided on the bottom of the power cabinet 2 , and a connecting piece is passed through the first flange and the second flange to fix the power cabinet 2 on the top of the motor 1 .

[0057] The power cabinet 2 is directly installed on the top flange of the motor 1, saving the separate installation space of the conventional inverter, and the cable of the motor 1 can be directly inserted from the top of the motor 1 into the cable entry hole at the bottom of the power cabinet 2, reducing the cable length and eliminating the need to use specially treated cables, greatly reducing on-site construction costs.

[0058] A third flange is provided at the bottom of the motor 1 , and the third flange is used to lock with the base plate 8 , so as to fix the motor 1 to a preset position of the base plate 8 .

[0059] In addition, a support member is provided between the motor 1 and the base plate 8, and the support member is used to adjust the distance between the rotating shaft of the motor 1 and the base plate 8. According to the required height of the machine axis of the non-standard hole position of the original motor 1 on site, the installation hole position of the third flange, the setting height of the support member, etc. can be flexibly changed to ensure that various non-standard load motors 1 can be seamlessly replaced without changing the inverter and the motor 1.

[0060] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0061] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0062] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A variable frequency motor integrated machine, characterized in that: include: base(8); A motor (1) mounted on the substrate (8); A transformer (7) mounted on the substrate (8) and adjacent to the motor (1), the transformer (7) comprising an air duct and a coil arranged inside the air duct; A cabinet body, comprising a transformer cabinet (6) and a power cabinet (2), wherein the transformer cabinet (6) is mounted on the base plate (8) and is provided with a first chamber therein for accommodating the transformer (7), the power cabinet (2) is located above the motor (1), and the power cabinet (2) is provided with a second chamber connected to the first chamber, and the cabinet body is provided with a first air outlet (11) connected to the first chamber and a second air outlet (12) connected to the second chamber; A cooling fan (5) is located in the first chamber and corresponds to the first air outlet (11).

2. The variable frequency motor integrated machine according to claim 1, characterized in that: The transformer cabinet (6) is provided with a sealing plate (10) inside to divide the first chamber into an upper first air duct chamber and a lower second air duct chamber. The sealing plate (10) is provided with a first ventilation hole connected to the first air duct chamber and the second air duct chamber. The heat dissipation fan (5) is arranged on the sealing plate (10) and is located in the first air duct chamber. The heat dissipation fan (5) is used to generate a negative pressure environment to guide the air in the second air duct chamber to flow into the first air duct chamber and then be discharged along the first air outlet (11).

3. The variable frequency motor integrated machine according to claim 2, characterized in that: A mounting plate is provided inside the second chamber to divide the second chamber into an upper mounting chamber and a lower third air duct chamber (9); the mounting plate is provided with a through hole; the second chamber comprises a core (4) connected to the mounting plate and located in the mounting chamber, and a heat sink (3) connected to the core (4) and extending into the third air duct chamber (9) through the through hole.

4. The variable frequency motor integrated machine according to claim 3, characterized in that: The second air outlet (12) is connected to the third air duct cavity (9), the power cabinet (2) is provided with a second ventilation hole, the second ventilation hole is connected to the third air duct cavity (9) and the second air duct cavity, so that the air entering the third air duct cavity (9) through the second air outlet (12) flows to the second air duct cavity.

5. The variable frequency motor integrated machine according to claim 4, characterized in that: The second ventilation hole is located at a height higher than the top of the air guide cylinder.

6. The variable frequency motor integrated machine according to any one of claims 1 to 5, characterized in that: The bottom of the transformer cabinet (6) is provided with a horizontally extending extension section around its periphery, the extension section is provided with a plurality of first mounting holes, the base plate (8) is provided with a plurality of second mounting holes corresponding to the first mounting holes, and fixing members are passed through the first mounting holes and the second mounting holes for detachable connection between the transformer cabinet (6) and the base plate (8).

7. The variable frequency motor integrated machine according to claim 6, characterized in that: The top of the motor (1) is provided with a first flange, the bottom of the power cabinet (2) is provided with a second flange, and a connecting piece is passed through the first flange and the second flange to fix the power cabinet (2) to the top of the motor (1).

8. The variable frequency motor integrated machine according to claim 6, characterized in that: A third flange is provided at the bottom of the motor (1), and the third flange is used to be locked with the base plate (8).

9. The variable frequency motor integrated machine according to claim 6, characterized in that: A support member is provided between the motor (1) and the base plate (8), and the support member is used to adjust the distance between the rotating shaft of the motor (1) and the base plate (8).

10. The variable frequency motor integrated machine according to claim 6, characterized in that: The bottom of the transformer (7) is provided with a ground foot, and the ground foot is detachably connected to the base plate (8).

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