High-voltage direct-driven permanent-magnet synchronous variable-frequency variable-voltage motor and mechanical driving system

Abstract

The utility model provides a high-voltage direct-drive permanent-magnet synchronous variable-frequency variable-voltage motor and a mechanical driving system. A direct-drive permanent-magnet synchronous motor is arranged on a first base; the first base extends towards the non-shaft extension end of the direct-drive permanent magnet synchronous motor and forms a mounting position; a first flat plate is arranged at the top of the direct-drive permanent-magnet synchronous motor; the transformer is arranged at the non-shaft extension end; the transformer is also connected with the high-voltage power grid and converts a first voltage from the high-voltage power grid into a second voltage lower than the first voltage; the frequency converter is arranged at the top of the direct-drive permanent magnet synchronous motor and is detachably connected with the first flat plate; and the frequency converter is connected with the transformer to receive the second voltage from the transformer and supply power to the direct-drive permanent-magnet synchronous motor by using the second voltage, so that the shaft extension end of the direct-drive permanent-magnet synchronous motor can drive a load connected with the shaft extension end to act. The design form of the all-in-one machine improves the power density and efficiency of the all-in-one machine, the integration degree is high, and the cost of the all-in-one machine is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electric motor technology, and in particular to a high-voltage direct-drive permanent magnet synchronous variable frequency variable motor and mechanical drive system. Background Technology

[0002] Current direct-drive permanent magnet synchronous motors cannot utilize high-voltage grid power, making them unsuitable for applications requiring high power density. Furthermore, connecting direct-drive permanent magnet synchronous motors to other devices for high power density applications necessitates the connection of various control pipes and lines, resulting in poor equipment integration and unsuitability for applications with limited space. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide a high-voltage direct-drive permanent magnet synchronous variable frequency variable motor and mechanical drive system.

[0004] The embodiments of this utility model adopt the following technical solution: a high-voltage direct-drive permanent magnet synchronous variable frequency motor, comprising:

[0005] First base;

[0006] A direct-drive permanent magnet synchronous motor has two ends, one with a shaft extension and the other with a non-shaft extension. The direct-drive permanent magnet synchronous motor is mounted on a first base. The first base extends toward the non-shaft extension end and forms a mounting position. A first plate is provided on the top of the direct-drive permanent magnet synchronous motor, and the top surface of the first plate is flat.

[0007] A transformer is disposed at the non-shaft extension end of the direct-drive permanent magnet synchronous motor, the transformer being disposed at the mounting position; the transformer is also connected to a high-voltage power grid and converts a first voltage from the high-voltage power grid into a second voltage, wherein the second voltage is lower than the first voltage;

[0008] A frequency converter is disposed on top of the direct-drive permanent magnet synchronous motor. The bottom surface of the frequency converter housing is attached to the top surface of the first plate, and the frequency converter is detachably connected to the first plate. The frequency converter is connected to the transformer to receive the second voltage from the transformer and to supply power to the direct-drive permanent magnet synchronous motor with the second voltage, so that the shaft extension end of the direct-drive permanent magnet synchronous motor can drive the load connected to the shaft extension end.

[0009] In some embodiments, the first plate is provided with a plurality of first threaded holes, and the housing of the frequency converter is provided with a second threaded hole corresponding to the first threaded hole. A plurality of bolts pass through the second threaded hole and engage with the first threaded hole to detachably mount the frequency converter on the top surface of the first plate.

[0010] In some embodiments, the first threaded hole is a through hole penetrating the first flat plate, or...

[0011] The first threaded hole is a blind hole.

[0012] In some embodiments, the direct-drive permanent magnet synchronous motor has a first heat dissipation duct, the frequency converter has a second heat dissipation duct, and the transformer has a third heat dissipation duct. The first heat dissipation duct, the second heat dissipation duct, and the third heat dissipation duct are connected to form a total heat dissipation duct. The two ends of the total heat dissipation duct are respectively open, and an exhaust fan is provided at one end of the total heat dissipation duct to exhaust the hot air in the total heat dissipation duct through the other end of the total heat dissipation duct.

[0013] In some embodiments, the top surface of the mounting position is a plane, the transformer is mounted on a second base, the bottom surface of the second base is a plane, the bottom surface of the second base is attached to the top surface of the mounting position, and the transformer is detachably connected to the first base through the second base.

[0014] In some embodiments, the input terminal of the frequency converter is located on the side of the non-shaft extension end, and the output terminal of the transformer is also located on the side of the non-shaft extension end, with the output terminal of the transformer connected to the input terminal of the frequency converter.

[0015] This application also provides a mechanical drive system, including a high-voltage direct-drive permanent magnet synchronous variable frequency motor as described in any of the above embodiments.

[0016] In some embodiments, the load connected to the high-voltage direct-drive permanent magnet synchronous variable frequency motor is a mechanical drive device, which is any one of the following devices:

[0017] Fan;

[0018] elevator;

[0019] Water pump.

[0020] The beneficial effects of this utility model embodiment are as follows:

[0021] This system integrates a direct-drive permanent magnet synchronous motor, a frequency converter, and a transformer into a single permanent magnet synchronous variable frequency and transformer unit. The frequency converter is mounted on top of the direct-drive permanent magnet synchronous motor, and the transformer is installed on the non-shaft extension end. This allows for high-voltage power supply from the grid, while the direct-drive permanent magnet synchronous motor and frequency converter operate at low voltage. This improves the power density and efficiency of the integrated unit and reduces its cost. Furthermore, the integrated design offers high integration and is suitable for applications with limited space. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the high-voltage direct-drive permanent magnet synchronous variable frequency motor of this utility model;

[0024] Figure 2 This is a schematic diagram of the high-voltage direct-drive permanent magnet synchronous variable frequency motor of this utility model from another angle;

[0025] Figure 3 This is a schematic diagram of the structure of the first base and the direct-drive permanent magnet synchronous motor of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the inverter and the first flat plate of this utility model.

[0027] Figure 5 This is a schematic diagram of the structure of the transformer and the first base of this utility model.

[0028] Figure 6 Corresponding to the first base of this utility model Figure 3 A schematic diagram of the P-direction structure;

[0029] Figure 7 This is a schematic diagram of the structure of the first flat plate of this utility model.

[0030] Reference numerals: 1. First base; 101. Mounting position; 2. Direct-drive permanent magnet synchronous motor; 201. Shaft extension end; 202. Non-shaft extension end; 203. First flat plate; 2031. First threaded hole; 3. Transformer; 301. Output end; 4. Frequency converter; 401. Input end. Detailed Implementation

[0031] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0032] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this application will be apparent to those skilled in the art.

[0033] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0034] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0035] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application.

[0036] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0037] Specific embodiments of this application are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in a variety of substantially any suitable detailed structures.

[0038] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0039] This application provides a high-voltage direct-drive permanent magnet synchronous variable frequency motor, which is an integrated machine that combines a motor, a frequency converter, and a transformer.

[0040] like Figure 1 and Figure 2 As shown, the high-voltage direct-drive permanent magnet synchronous variable frequency motor includes a first base 1, a direct-drive permanent magnet synchronous motor 2, a transformer 3, and a frequency converter 4.

[0041] like Figure 6As shown, the first base 1 serves as the mounting foundation for the direct-drive permanent magnet synchronous motor 2 and the transformer 3. The first base 1 can be made of a long plate, and the direct-drive permanent magnet synchronous motor 2 and the transformer 3 are arranged along the length direction of the first base 1. The length of the first base 1 is not greater than the total length of the direct-drive permanent magnet synchronous motor 2 and the transformer 3 along the length direction of the first base 1, to avoid the outer edge of the first base 1 extending to the outer edge of the direct-drive permanent magnet synchronous motor 2 and / or the transformer 3, which would cause inconvenience in use, and at the same time, to prevent the corners of the first base 1 from causing scratches and injuries to the user.

[0042] The first base 1 can be made of metal plate, or other rigid materials, as long as they can guarantee the load-bearing capacity for the direct-drive permanent magnet synchronous motor 2 and the transformer 3. There are no specific restrictions on the specific materials.

[0043] The two ends of the direct-drive permanent magnet synchronous motor 2 are respectively a shaft extension end 201 and a non-shaft extension end 202. The shaft extension end 201 can be understood as one end of the output shaft. The output shaft of the direct-drive permanent magnet synchronous motor 2 can be connected to the load or to a structure such as a reducer.

[0044] The direct-drive permanent magnet synchronous motor 2 is detachably mounted on the first base 1. For example, the direct-drive permanent magnet synchronous motor 2 can fix its housing to the first base 1 with detachable screws, which facilitates the installation and removal of the direct-drive permanent magnet synchronous motor 2.

[0045] like Figure 3 and Figure 4 As shown, the first base 1 extends toward the non-shaft extension end 202 of the direct-drive permanent magnet synchronous motor 2 and forms a mounting position 101, which can be used to install the transformer 3. A first plate 203 is provided on the top of the direct-drive permanent magnet synchronous motor 2. The top surface of the first plate 203 is flat, and the first plate 203 can be used to install the frequency converter 4.

[0046] For example, transformer 3 is located at the non-shaft extension end 202 of direct-drive permanent magnet synchronous motor 2, and transformer 3 is detachably mounted on mounting position 101. For example, the housing of transformer 3 can be fixed to the first base 1 with detachable screws, which facilitates the installation and removal of transformer 3.

[0047] Transformer 3 is also connected to a high-voltage power grid and converts the first voltage from the high-voltage grid into a second voltage, which is lower than the first voltage. The first voltage can be understood as high voltage, and the second voltage can be understood as low voltage suitable for use by inverter 4 and direct-drive permanent magnet synchronous motor 2. The specific value of the second voltage can be set according to the usage requirements of inverter 4 and direct-drive permanent magnet synchronous motor 2.

[0048] The frequency converter 4 is mounted on top of the direct-drive permanent magnet synchronous motor 2, such as... Figure 5 As shown, the bottom surface of the inverter 4's housing is also flat. The bottom surface of the inverter 4's housing is attached to the top surface of the first plate 203, and the inverter 4 and the first plate 203 are detachably connected to facilitate the installation and removal of the inverter 4.

[0049] The frequency converter 4 is connected to the transformer 3 to receive a second voltage from the transformer 3, and uses this second voltage to power the direct-drive permanent magnet synchronous motor 2, so that the shaft extension end 201 of the direct-drive permanent magnet synchronous motor 2 can drive the load connected to the shaft extension end 201. Of course, it should be noted here that the load can also be a load that has been decelerated by a reducer.

[0050] The high voltage of the high-voltage power grid is transformed into low voltage by transformer 3, and then supplied to frequency converter 4. Frequency converter 4 then supplies power to the low-speed direct-drive permanent magnet synchronous motor 2, realizing high-voltage power supply from the power grid and low-voltage operation of the direct-drive permanent magnet synchronous motor 2 and frequency converter 4. This ultimately forms a high-voltage direct-drive permanent magnet synchronous variable frequency and voltage converter integrated machine, greatly reducing the cost of frequency converter 4 and direct-drive permanent magnet synchronous motor 2. In addition, it also realizes low-speed, high-torque and vector frequency conversion control to drive load equipment. The high-voltage direct-drive permanent magnet synchronous variable frequency and voltage converter integrated machine has the characteristics of very high cost performance, compact overall structure, small footprint, convenient use, beautiful appearance, strong mobility, high power density, high control precision, and good equipment stability. It avoids the complexity of connection lines caused by the need for various lengths of cables when the direct-drive permanent magnet synchronous motor 2, frequency converter 4, and transformer 3 are connected separately.

[0051] In some embodiments, such as Figure 7 As shown, the first plate 203 is provided with a plurality of first threaded holes 2031, and the housing of the frequency converter 4 is provided with second threaded holes corresponding to the first threaded holes 2031. Multiple bolts pass through the second threaded holes and engage with the first threaded holes 2031 to detachably mount the frequency converter 4 on the top surface of the first plate 203.

[0052] The first threaded hole 2031 is a through hole that passes through the first flat plate 203, or the first threaded hole 2031 is a blind hole.

[0053] Of course, it is understandable that when a through hole for bolt connection is provided on the first plate 203, the through hole can also be a non-threaded hole. The bolt can be tightened and secured by a nut after passing through the through hole. The second threaded hole can also be a non-threaded hole, as long as it allows the bolt to pass through.

[0054] In addition, the first plate 203 can also be provided with a mounting slot according to the shape of the inverter 4 housing, so that the inverter 4 can be placed in the mounting slot provided on the first plate 203, ensuring that the mounting position 101 of the inverter 4 does not change during use and preventing the inverter 4 from shaking.

[0055] In some embodiments, the direct-drive permanent magnet synchronous motor 2 has a first heat dissipation duct, the frequency converter 4 has a second heat dissipation duct, and the transformer 3 has a third heat dissipation duct. The first, second, and third heat dissipation ducts are connected to form a main heat dissipation duct. Both ends of the main heat dissipation duct have openings, and an exhaust fan is installed at one end of the main heat dissipation duct to exhaust the hot air inside the main heat dissipation duct through the opening at the other end of the main heat dissipation duct.

[0056] The cooling duct of the direct-drive permanent magnet synchronous motor 2, frequency converter 4 and transformer 3 is designed as a whole. Only one exhaust fan needs to be installed at one end of the whole cooling duct to achieve the cooling of the direct-drive permanent magnet synchronous motor 2, frequency converter 4 and transformer 3. This makes the integrated machine composed of the direct-drive permanent magnet synchronous motor 2, frequency converter 4 and transformer 3 more integrated and more suitable for use scenarios with limited space.

[0057] In some embodiments, the top surface of the mounting position 101 is a plane, the transformer 3 is mounted on the second base, the bottom surface of the second base is a plane, the bottom surface of the second base is attached to the top surface of the mounting position 101, and the transformer 3 is detachably connected to the first base 1 through the second base.

[0058] For example, the second base can be connected to the first base 1 by detachable bolts. When the height of the transformer 3 cannot be well adapted to the installation height of the direct-drive permanent magnet synchronous motor 2 and the frequency converter 4, the transformer 3 can be placed on the second base so that the output end 301 of the transformer 3 can be closer to the input end 401 of the frequency converter 4, which facilitates the connection between the frequency converter 4 and the transformer 3.

[0059] In some embodiments, combined again Figure 1 The input terminal 401 of the frequency converter 4 is located on the non-shaft extension end 202 side, and the output terminal 301 of the transformer 3 is also located on the non-shaft extension end 202 side. The output terminal 301 of the transformer 3 is connected to the input terminal 401 of the frequency converter 4. This makes it easier to connect the output terminal 301 of the transformer 3 to the input terminal 401 of the frequency converter 4, thereby further reducing the space occupied by the integrated machine.

[0060] This application also provides a mechanical drive system, which may include a high-voltage direct-drive permanent magnet synchronous variable frequency motor as described in any of the above embodiments.

[0061] In some embodiments, the load connected to the high-voltage direct-drive permanent magnet synchronous variable frequency motor is a mechanical drive device, which is any one of the following devices:

[0062] Fan;

[0063] elevator;

[0064] Water pump.

[0065] This mechanical drive system can be used in environments with limited space, such as mines.

[0066] The foregoing has described in detail several embodiments of the present utility model, but the present utility model is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications based on the concept of the present utility model, and these variations and modifications should all fall within the scope of protection claimed by the present utility model.

Claims

1. A high-voltage direct-drive permanent magnet synchronous variable frequency motor, characterized in that, include: First base; A direct-drive permanent magnet synchronous motor has two ends, one with a shaft extension and the other with a non-shaft extension. The direct-drive permanent magnet synchronous motor is mounted on a first base. The first base extends toward the non-shaft extension end and forms a mounting position. A first plate is provided on the top of the direct-drive permanent magnet synchronous motor, and the top surface of the first plate is flat. A transformer is disposed at the non-shaft extension end of the direct-drive permanent magnet synchronous motor, the transformer being disposed at the mounting position; the transformer is also connected to a high-voltage power grid and converts a first voltage from the high-voltage power grid into a second voltage, wherein the second voltage is lower than the first voltage; A frequency converter is disposed on top of the direct-drive permanent magnet synchronous motor. The bottom surface of the frequency converter housing is attached to the top surface of the first plate, and the frequency converter is detachably connected to the first plate. The frequency converter is connected to the transformer to receive the second voltage from the transformer and to supply power to the direct-drive permanent magnet synchronous motor with the second voltage, so that the shaft extension end of the direct-drive permanent magnet synchronous motor can drive the load connected to the shaft extension end.

2. The high-voltage direct-drive permanent magnet synchronous variable frequency motor according to claim 1, characterized in that, The first plate is provided with a plurality of first threaded holes, and the housing of the frequency converter is provided with second threaded holes corresponding to the first threaded holes. A plurality of bolts pass through the second threaded holes and engage with the first threaded holes to detachably mount the frequency converter on the top surface of the first plate.

3. The high-voltage direct-drive permanent magnet synchronous variable frequency motor according to claim 2, characterized in that, The first threaded hole is a through hole that penetrates the first flat plate, or... The first threaded hole is a blind hole.

4. The high-voltage direct-drive permanent magnet synchronous variable frequency motor according to claim 1, characterized in that, The direct-drive permanent magnet synchronous motor has a first heat dissipation duct, the frequency converter has a second heat dissipation duct, and the transformer has a third heat dissipation duct. The first heat dissipation duct, the second heat dissipation duct, and the third heat dissipation duct are connected to form a total heat dissipation duct. Both ends of the total heat dissipation duct have openings. An exhaust fan is installed at one end of the opening of the total heat dissipation duct to exhaust the hot air in the total heat dissipation duct through the opening at the other end of the total heat dissipation duct.

5. The high-voltage direct-drive permanent magnet synchronous variable frequency motor according to claim 1, characterized in that, The top surface of the mounting position is a plane, the transformer is mounted on the second base, the bottom surface of the second base is a plane, the bottom surface of the second base is attached to the top surface of the mounting position, and the transformer is detachably connected to the first base through the second base.

6. The high-voltage direct-drive permanent magnet synchronous variable frequency motor according to claim 1, characterized in that, The input terminal of the frequency converter is located on the side of the non-shaft extension end, and the output terminal of the transformer is also located on the side of the non-shaft extension end. The output terminal of the transformer is connected to the input terminal of the frequency converter.

7. A mechanical drive system, characterized in that, Including the high-voltage direct-drive permanent magnet synchronous variable frequency motor as described in any one of claims 1 to 6.

8. The mechanical drive system according to claim 7, characterized in that, The load connected to the high-voltage direct-drive permanent magnet synchronous variable frequency motor is a mechanical drive device, which is any one of the following devices: Fan; elevator; Water pump.

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