Permanent magnet frequency conversion all-in-one machine

Abstract

The permanent magnet frequency conversion all-in-one machine comprises a frequency converter and a permanent magnet motor, the permanent magnet motor extends front and back in the axial direction of the permanent magnet motor, the frequency converter is integrated on the peripheral side of the permanent magnet motor, a power supply and distribution device is further arranged on the peripheral side of the permanent magnet motor, and the power supply and distribution device is detachably connected with the frequency converter and used for providing electric energy for electric equipment. According to the permanent magnet frequency conversion all-in-one machine, the design concept that the frequency converter, the power supply and distribution device and the permanent magnet motor are integrated is adopted, the application requirement for small size is met, modular design of the frequency converter and the power supply and distribution device is achieved, on-site replacement and maintenance are facilitated, the power supply and distribution device can provide electric energy for electric equipment in a belt conveyor system, and cost is reduced. Meanwhile, due to installation space limitation and use requirements possibly occurring on site, the power supply and distribution device can be disassembled or installed in a side-changing mode according to different application scenes, so that the purpose of simplifying an on-site power supply and distribution system is achieved, and on-site use is facilitated.

Description

Technical Field

[0001] This disclosure generally relates to the technical field of mine power supply and distribution. More specifically, this disclosure relates to a permanent magnet variable frequency integrated machine. Background Art

[0002] The driving modes of belt conveyors in China have mainly experienced an evolution process from "mobile substation + double-speed motor + reducer", "mobile substation + motor + hydraulic coupling + reducer", "mobile substation + motor + CST" to "mobile substation + frequency converter + motor + reducer". Currently, the drive mode of "mobile substation + frequency converter + asynchronous motor + reducer" is the main one, which has the advantages of small impact on mechanical and electrical systems during startup and automatic speed regulation. However, there are still problems such as large volume, low power factor, large electromagnetic interference, large mechanical wear, and difficult maintenance. In recent years, the combination of mobile substation + frequency converter + permanent magnet direct drive motor in mines has gradually become the main solution to the above problems. However, with the further improvement of the country's requirements for green coal mining, and there are also problems in coal mine belt conveyors such as high incoming line voltage level, low system efficiency, narrow installation space, frequent relocation of belt conveyors in gate roadways, and complex and large electromagnetic interference environment. The existing technologies are difficult to meet the above requirements.

[0003] In view of this, there is an urgent need to provide a permanent magnet variable frequency integrated machine solution to solve problems such as high incoming line voltage level, difficult maintenance, and narrow installation space. Summary of the Invention

[0004] To solve at least one or more of the above-mentioned technical problems, this disclosure proposes a permanent magnet variable frequency integrated machine solution.

[0005] This disclosure provides a permanent magnet variable frequency integrated machine, including a frequency converter and a permanent magnet motor. The permanent magnet motor extends forward and backward along its axial direction, and the frequency converter is integrated on the periphery of the permanent magnet motor. A power supply and distribution device is also provided on the periphery of the permanent magnet motor. The power supply and distribution device is detachably connected to the frequency converter and is used to provide electrical energy for electrical equipment.

[0006] In some embodiments, the power supply and distribution device includes a box body and ports provided on the box body. The ports include an input port, a direct output port, and an indirect output port. The input port is connected to access the power supply; the direct output port is electrically connected to the input port and is used to directly output the input power supply; the indirect output port is electrically connected to the input port and is connected to the permanent magnet motor through the frequency converter.

[0007] In some embodiments, multiple groups of transformers are provided inside the power supply and distribution device. The multiple groups of transformers are electrically connected to the input port and other electrical equipment, and convert the voltage of the input power supply into the voltages required by other electrical equipment.

[0008] In some embodiments, a disconnect switch and a vacuum contactor are provided inside the power supply and distribution device. Multiple groups of transformers and indirect output ports are connected to the input port through the disconnect switch to disconnect the faulty circuit.

[0009] In some embodiments, a control unit is provided inside the power supply and distribution device. The control unit is used to control the current at each voltage to enter other electrical equipment.

[0010] In some embodiments, the power supply and distribution device further includes multiple output ports. Multiple groups of transformers and other electrical equipment are connected through the multiple output ports.

[0011] In some embodiments, the frequency converter includes a frequency conversion module, a control module, and a protection module. The frequency conversion module is connected to the permanent magnet motor and is used to convert the frequency of the input power supply into different frequencies for output. The control module is arranged on the upper layer of the frequency conversion module to control the frequency conversion module. The protection module includes a fuse, a reactor, and a contactor, which are connected to the input power supply or the power supply and distribution device and are used to protect the frequency conversion module.

[0012] In some embodiments, the frequency conversion module is arranged on a water-cooled heat dissipation plate, and the water-cooled heat dissipation plate is provided with an S-shaped heat dissipation water channel.

[0013] In some embodiments, the frequency conversion module includes a power module and a filter capacitor module. The power module and the filter capacitor module are connected by a laminated busbar to reduce the parasitic inductance.

[0014] In some embodiments, the power module includes a rectification module and an inversion module. The rectification module and the inversion module are electrically connected. The rectification module is connected to the protection module, and the inversion module is connected to the permanent magnet motor.

[0015] In some embodiments, the power module includes an insulating frame arranged around it, which is used to isolate the high-voltage power supply and can enable the power module to dissipate heat evenly.

[0016] In some embodiments, the frequency converter includes at least one standby incoming line port, which is arranged on the side wall of the frequency converter and is connected to the protection module for connecting the input power supply.

[0017] With a permanent magnet variable frequency integrated machine provided as above, the disclosed embodiments adopt the design concept of integrating a frequency converter, a power supply and distribution device, and a permanent magnet synchronous motor. Moreover, the frequency conversion unit and the power supply and distribution unit are modularized, facilitating on-site replacement and maintenance. The power supply and distribution device can supply power to other electrical equipment in the belt conveyor system, simplifying the on-site power supply and distribution system. Due to possible installation space limitations and usage requirements on site, the power supply and distribution device can be disassembled, assembled, or installed with the side changed according to different application scenarios to facilitate on-site use. Further, in some embodiments, by providing ports on the box body of the power supply and distribution device, electrical equipment can be quickly assembled, making the assembly of the power supply and distribution device faster, quickly supplying power to the surrounding electrical equipment, and simplifying the on-site assembly procedure. Even operators who are not familiar with the power supply and distribution device can quickly assemble and use it, improving work efficiency. Furthermore, in some embodiments, by arranging multiple groups of transformers in the power supply and distribution device, the voltage of the input power supply can be transformed into various voltages required by the electrical equipment to supply power to the surrounding electrical equipment, eliminating the need to use a mobile substation and simplifying the assembly process. Furthermore, in some embodiments, by providing a disconnect switch and a vacuum contactor in the power supply and distribution device, not only the safety of operators can be protected, but also the power supply and distribution device can be protected. When power is not needed, the circuit can be manually cut off, and when a circuit fault occurs, power can also be automatically cut off. Such double isolation protection improves safety performance. Furthermore, in some embodiments, the modular design of the frequency converter can make the maintenance or overhaul of the frequency converter more convenient. Furthermore, in some embodiments, by arranging the frequency conversion module on a water-cooled heat dissipation plate, the temperature of the frequency converter can be reduced, enabling the frequency converter to operate normally. Furthermore, in some embodiments, by providing at least one spare incoming line port on the frequency converter to connect to the input power supply or the output power supply of the power supply and distribution device, the permanent magnet variable frequency integrated machine can be directly connected to an external power supply, realizing the flexible assembly of the power supply and distribution device. Even if one power supply and distribution device has problems, it will not affect the use of other power supply and distribution devices and the permanent magnet variable frequency integrated machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the drawings, several embodiments of the present disclosure are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0019] Figure 1 shows a schematic diagram of the overall structure of the permanent magnet variable frequency integrated machine according to the embodiment of the present disclosure;

[0020] Figure 2 shows a schematic diagram of the overall structure of the power supply and distribution device according to the embodiment of the present disclosure;

[0021] Figure 3 Shows the block diagram of the port connection structure of the power supply and distribution device according to some embodiments of the present disclosure;

[0022] Figure 4 Shows the block diagram of the belt conveyor system structure according to some embodiments of the present disclosure;

[0023] Figure 5 Shows the internal block diagram of the power supply and distribution device according to some embodiments of the present disclosure;

[0024] Figure 6 Shows the schematic diagram of the internal structure of the power supply and distribution device according to some embodiments of the present disclosure;

[0025] Figure 7 Shows the schematic diagram of the A - A structure of the power supply and distribution device according to some embodiments of the present disclosure;

[0026] Figure 8 Shows the schematic diagram of the overall structure of another permanent magnet variable frequency integrated machine according to some embodiments of the present disclosure;

[0027] Figure 9 Shows the schematic diagram of the structure of the frequency conversion box according to some embodiments of the present disclosure;

[0028] Figure 10 Shows the schematic diagram of the internal structure of the protection box according to some embodiments of the present disclosure;

[0029] Figure 11 Shows the schematic diagram of the A - A structure of the frequency conversion box according to some embodiments of the present disclosure;

[0030] Figure 12 Shows the schematic diagram of the B - B structure of the frequency conversion box according to some embodiments of the present disclosure;

[0031] Figure 13 Shows the schematic diagram of the structure of the water - cooled heat dissipation plate according to some embodiments of the present disclosure.

[0032] Reference numerals:

[0033] 1. Frequency converter; 11. Frequency conversion module; 111. Power module; 1111. Rectification module; 1112. Inversion module; 1113. Insulating sheath; 112. Filter capacitor module; 113. Water - cooled heat dissipation plate; 1131. S - shaped heat dissipation water channel; 12. Control module; 13. Protection module; 131. Fuse; 132. Reactor; 133. Contactor; 134. Pre - charger; 14. Frequency conversion box; 141. Display screen; 15. Protection box; 16. Spare incoming line port;

[0034] 2. Permanent magnet motor;

[0035] 3. Power supply and distribution device; 31. Box body; 311. Input port; 312. Direct output port; 313. Indirect output port; 314. Switching on / off observation window; 32. Multiple groups of transformers; 321. 12kV / 1.36kV transformer; 322. 12kV / 265V transformer; 323. 1.36kV / 152V transformer; 33. Isolating switch; 331. Switch body; 332. Switching on and off; 34. Vacuum contactor; 35. Control element; 351. Circuit breaker; 3511. 1140V operation button; 3512. 127V operation button; 3513. 10KV operation button; 352. 1140V contactor; 36. Output port; 361. 1140V output port; 362. 127V output port;

[0036] 4. First external all-in-one machine;

[0037] 5. Second external all-in-one machine;

[0038] 6. Third external all-in-one machine. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present disclosure.

[0040] It should be understood that the terms "including" and "comprising" used in the specification and claims of the present disclosure indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0041] It should also be understood that the terms used in the specification of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the present disclosure. As used in the specification and claims of the present disclosure, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms. It should be further understood that the term " / and / " used in the specification and claims of the present disclosure refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0042] As used in this specification and the claims, the term "if" can be construed contextually as "when" or "once" or "in response to determining" or "in response to detecting". Similarly, the phrase "if determined" or "if [the described condition or event] is detected" can be construed contextually to mean "once determined" or "in response to determining" or "once [the described condition or event] is detected" or "in response to detecting [the described condition or event]".

[0043] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0044] The present disclosure provides a permanent magnet variable frequency integrated machine, as Figure 1 shown, which includes an inverter 1 and a permanent magnet motor 2. The permanent magnet motor 2 extends forward and backward along its axial direction. The inverter 1 is integrated on the circumferential side of the permanent magnet motor 2. A power supply and distribution device 3 is also provided on the circumferential side of the permanent magnet motor 2. The power supply and distribution device 3 is detachably connected to the inverter 1 and is used to provide electrical energy for electrical equipment.

[0045] Specifically, the frequency converter 1 is integrated on the circumferential side of the permanent magnet motor 2. The frequency converter 1 adopts a cuboid structure to modularize the internal structure of the frequency converter 1, which is convenient for maintenance and replacement. The frequency converter 1 can be directly connected to a high-voltage cable, such as a 10KV cable, to convert the frequency of the high-voltage cable into the frequency applicable to the permanent magnet motor 2. The permanent magnet motor 2 extends along its axial direction to form a cylindrical structure, which can directly provide kinetic energy for the belt conveyor. The permanent magnet motor 2 uses water-cooled heat dissipation and has the characteristics of low noise and low pollution during operation. The permanent magnet motor 2 adopts a 4-way winding input structure, which cooperates with the multi-way output structure of the frequency converter 1 to reduce the damage to the insulation of the motor coil caused by frequency conversion harmonics. The stator coil is composed of 4 parallel three-phase branch line coil windings. The permanent magnet motor 2 and the frequency converter 1 are combined to form an integrated machine. In the following introduction, the "integrated machine" refers to the permanent magnet motor 2 with the frequency converter 1. The power supply and distribution device 3 can be selectively assembled on the left and right sides of the frequency converter 1 according to the on-site situation to provide electrical energy for the integrated machine and other electrical equipment. Installing the power supply and distribution device 3 on the integrated machine can solve the problem of power supply for surrounding electrical equipment, eliminating the need to use a mobile substation and install cables for each surrounding electrical equipment one by one. This greatly reduces the installation cost of the power supply cables of the integrated machine, reduces the construction difficulty, and saves construction time. At the same time, the permanent magnet variable frequency integrated machine is small in size, convenient for on-site installation, more convenient for the integrated machine to go down the well, easy to move, and the gate belt conveyor does not need to move frequently.

[0046] As Figures 2 to 4As shown, preferably, the power supply and distribution device 3 includes a box body 31 and ports provided on the box body 31. The ports include an input port 311, a direct output port 312, and an indirect output port 313. The input port 311 is connected to a power supply; the direct output port 312 is electrically connected to the input port 311 for directly outputting the input power supply; the indirect output port 313 is electrically connected to the input port 311 and is connected to a permanent magnet motor 2 through an inverter 1.

[0047] Specifically, the input port 311 and the direct output port 312 are arranged side by side on the rear side wall of the box body 31. Here, the front and rear are based on the axial direction of the permanent magnet motor 2, used for plugging in external cables without affecting the assembly of the box body 31 to the integrated machine. To achieve the minimization of the box body 31, the box body 31 adopts an inverted L shape, and the input port 311 and the direct output port 312 are arranged in the vacant space of the inverted L shape to reduce the occupation of the surrounding space. The input port 311 is used to plug in the cable of the input power supply. The input port 311 and the direct output port 312 are directly connected by wires inside the box body 31. That is to say, the input power supply enters the box body 31 through the input port 311 and then comes out from the direct output port 312 without any voltage change. For example, if the input power supply is 10 kV, then the voltage input from the input port 311 is 10 kV, and the voltage output from the direct output port 312 is still 10 kV. The direct output port 312 can be connected to the input port 311 of the next power supply and distribution device 3 or can be connected to the second external integrated machine 5. The indirect output port 313 is arranged on the side wall of the box body 31 close to the integrated machine. The indirect output port 313 is connected to the first external integrated machine 4 to provide electrical energy for the first external motor 4. That is to say, when multiple integrated machines need to operate in series, only one 10 kV cable needs to be led out from the input power supply and plugged into the 10 kV input port 311 of the power supply and distribution device 3 of one of the integrated machines, and the remaining integrated machines can be connected in sequence through the 10 kV direct output port 312. The indirect output port 313 of the power supply and distribution device 3 supplies electrical energy to the assembled integrated machine. For example, a belt conveyor system is usually configured with three belt conveyors, the first external integrated machine 4, the second external integrated machine 5, and the third external integrated machine 6. When three integrated machines need to be powered simultaneously, only two of them, the first external integrated machine 4 and the second external integrated machine 5, need to be configured with a power supply and distribution device 3 to meet the power consumption of the equipment near the mine. The third external integrated machine 6 only needs to be directly connected to the direct output port 312 of the power supply and distribution device 3 of the second external integrated machine 5 without the need to configure a separate power supply and distribution device 3. This saves a device, improves work efficiency, and reduces the failure rate at the same time.

[0048] As Figures 5 to 6As shown, preferably, the power supply and distribution device 3 includes multiple groups of transformers 32. The multiple groups of transformers 32 are electrically connected to the input port 311 and other electrical equipment, and convert the voltage of the input power supply into the voltages required by other electrical equipment.

[0049] Specifically, the multiple groups of transformers 32 are fixed in the box body 31, which includes a 12kV / 1.36kV transformer 321 for converting 10kV to 1140V, a 12kV / 265V transformer 322 for converting 10kV to 220V, and a 1.36kV / 152V transformer 323 for converting 1140V to 127V. The 12kV / 1.36kV transformer 321 and the 12kV / 265V transformer 322 are connected to the 10KV input power supply through the input port 311, and the 1.36kV / 152V transformer 323 is connected to the 12kV / 1.36kV transformer 321. Among them, the 12kV / 1.36kV transformer 321 provides electrical energy for the water-cooling system, coiling machine, tensioning machine, and iron removal machine in the belt conveyor system, etc.; the 12kV / 265V transformer 322 provides electrical energy for the interior of the power supply and distribution device 3; the 1.36kV / 152V transformer 323 provides electrical energy for the lighting system, etc. Therefore, the multiple groups of transformers 32 provided in the power supply and distribution device 3 can not only provide electrical energy for the integrated machine, but also provide power for other equipment in the belt conveyor system, providing great convenience for underground power supply. Of course, there can also be other transformers, which are not limited here as long as they meet the underground electricity consumption requirements.

[0050] As Figures 5 to 8 shown, preferably, the power supply and distribution device 3 is provided with a disconnecting switch 33 and a vacuum contactor 34. The multiple groups of transformers 32 and the indirect output port 313 are connected to the input port 311 through the disconnecting switch 33 to disconnect the faulty circuit.

[0051] Specifically, the input power supply enters the box body 31 from the input port 311. One path directly outputs through the direct output port 312. The other path is connected to the disconnecting switch 33 and the vacuum contactor 34, and then connected to multiple groups of transformers 32 or the indirect output port 313. The disconnecting switch 33 is a manually operated disconnecting switch, including a switch body 331 and a closing and opening mechanism 332. The switch body 331 is arranged inside the box body, and the closing and opening mechanism 332 is arranged outside the side wall of the box body 4. An opening and closing observation window 314 is arranged outside the side wall of the box body 4 for maintenance personnel to observe the opening and closing conditions of the switch body 331 inside the box body 4. The disconnecting switch 33 can disconnect all the circuits inside the box body 31, but does not include the circuit output from the direct output port 312. When the power supply and distribution device 3 fails and cannot be used, it still does not affect the power supply to the next integrated machine. Of course, when maintenance is required and the overall circuit is disconnected, it still does not affect the operation of the next integrated machine, thus protecting the normal operation of the belt conveyor system and ensuring the safety of maintenance personnel at the same time. The vacuum contactor 34 is an automatic switch and will automatically disconnect when a circuit fault occurs. Such a design concept of using dual switches provides double protection for the power supply and distribution device 3, maintenance personnel, and the belt conveyor system.

[0052] As Figures 5 to 7 shown, preferably, a control element 35 is arranged inside the power supply and distribution device 3, and the control element 35 is used to control the current at each voltage to enter other electrical equipment.

[0053] Specifically, the control element 35 includes a circuit breaker 351 and a 1140V contactor 352, and they are integrated on the side wall of the box body 31. Both the circuit breaker 351 and the 1140V contactor 352 are switches. The circuit breaker 351 is a switch manually controlled by an operator, while the 1140V contactor 352 can automatically disconnect when a short circuit occurs. The circuit breaker 351 and the 1140V contactor 352 are connected in series. Multiple groups of transformers 32 are connected to electrical equipment through the circuit breaker 351 and the 1140V contactor 352 to control the output of different power supplies. If a fault occurs in a part of the equipment circuit, the faulty circuit can be cut off without affecting the normal operation of other electrical equipment. The 1140V contactor 352 is arranged on the inner side wall of the box body 31, and only the 1140V contactor 352 for the 1140 circuit is arranged here. When the circuit is short-circuited, it is used to protect the power supply and distribution device 3. The control body of the circuit breaker 351 is arranged on the inner side wall of the box body 31, and the operation button is arranged on the outer side wall of the box body 31. As Figure 1As shown in the figure, it is convenient for the operator to operate. Here, the side wall preferably refers to the rear side wall of the power supply and distribution device 3. Here, the operation buttons may include three 1140V operation buttons 3511 to control the power output of three 1140V; two 127V operation buttons 3512 to control the power output of two 127V; and two 10KV operation buttons 3513 to control the output of the direct output port 312 and the indirect output port 313. The number of the circuit breakers 351 is determined according to the amount of the output power supply, and there is no limitation here. Each of the operation buttons is of explosion-proof structure and meets the explosion-proof requirements of Class Ι in coal mines.

[0054] As Figure 2 shown, preferably, the power supply and distribution device 3 further includes a plurality of output ports 36, and multiple groups of transformers 32 are connected to other electrical equipment through the plurality of output ports 36.

[0055] Specifically, the output ports 36 are neatly arranged above the input port 311 and the direct output port 312. The output ports 36 are connected to multiple groups of transformers 32 and are the power output jacks. The output interfaces 36 may include 1140V output ports 361 and 127V output ports 362 for plugging in external electrical equipment. Of course, there may be more output interfaces 36, and there is no limitation here. The setting of the output ports 36 enables the operator not to need long-term learning when using the power supply and distribution device 3, and only needs to remember the plugging positions, thus shortening the time for the power supply and distribution device 3 to energize the surrounding electrical equipment on site and improving the work efficiency.

[0056] As Figures 8 to 12 shown, preferably, the frequency converter 1 includes a frequency conversion module 11, a control module 12, and a protection module 13. The frequency conversion module 11 is connected to the permanent magnet motor 2 and is used to convert the frequency of the input power supply into different frequencies for output; the control module 12 is arranged on the upper layer of the frequency conversion module 11 to control the frequency conversion module 11; the protection module 13 includes a fuse 131, a reactor 132, and a contactor 133, and is connected to the input power supply or the power supply and distribution device 3 to protect the frequency conversion module 11.

[0057] Specifically, the frequency conversion module 11, the control module 12 and the protection module 13 are all modularly designed. The frequency conversion module 11 and the control unit 12 are arranged in the same frequency conversion box 14, and the protection module 13 is separately arranged in the protection box 15. The frequency conversion box 14 is arranged around the permanent magnet motor 2. The control module 12 is arranged on the upper layer of the frequency conversion box 14, and the equipment can be repaired by opening the cover. The frequency conversion module 11 is arranged on the lower layer of the control unit 12. A display screen 141 is arranged behind the frequency conversion box 14 to display the operating status of the equipment in real time. The protection box 15 is assembled around the frequency conversion box 14. Here, the protection box 15 is assembled behind the frequency conversion box 14 to protect the frequency converter 1, including a fuse 131, a reactor 132 and a contactor 133, and also includes a precharger 134 to provide power to the contactor 133. The power supply and distribution device 3 is connected to the frequency converter 1, first through the fuse 131, then through the reactor 132, then through the contactor 133, and finally enters the frequency conversion module 11, and then enters the permanent magnet motor 2 through the frequency conversion module 11. The modular design of each part facilitates on-site replacement and maintenance.

[0058] like Figures 12 to 13 As shown, preferably, the frequency conversion module 11 is arranged on a water-cooled heat sink 113 , and the water-cooled heat sink 113 has an S-shaped heat dissipation channel 1131 .

[0059] Specifically, the frequency conversion module 11 is a high-heat-generating component. During the operation of the frequency conversion module 11, the high heat will affect the working efficiency of the frequency converter 1, and the frequency converter 1 needs to be cooled. The heat is dissipated by setting a water-cooled heat sink 113 with an S-shaped heat dissipation water channel 1131. The cooling water in the water channel passes through the bottom of the heating module, and the cold water takes away the heat, thereby meeting the heat dissipation requirements of the high-heat-generating component.

[0060] like Figures 11 to 12 As shown, preferably, the frequency conversion module 11 includes a power module 111 and a filter capacitor module 112, and the power module 111 and the filter capacitor module 112 are connected by a laminated busbar to reduce parasitic inductance.

[0061] Specifically, the variable frequency module 11 uses a stacked busbar to directly connect the power module 111 and the filter capacitor module 112, resulting in smaller parasitic inductance and effectively cutting off the interference of the power bus to the control circuit. Among them, the power module 111 includes a rectification module 1111 and an inversion module 1112. The rectification module 1111 and the inversion module 1112 are distributed on both sides of the water-cooled heat dissipation plate 113 and are electrically connected. The rectification module 1111 converts alternating current into direct current, and the rectification module 1111 is connected to the protection module 13. The inversion module 1112 converts direct current into alternating current and is connected to the permanent magnet motor 2. Preferably, an insulating sheath 1113 is provided outside the rectification module 1111 and the inversion module 1112. The insulating sheath 1113 is an insulating ceramic plate and an insulating frame to isolate the high-voltage power supply. The insulating ceramic plate is arranged at the bottom, and the insulating frame is arranged around the periphery to enable the power module 111 to dissipate heat evenly and prevent local high temperature from causing explosion.

[0062] As Figure 8 shown, preferably, the frequency converter 1 includes at least one spare incoming line port 16. The spare incoming line port 16 is arranged on the side wall of the frequency converter 1 and is connected to the protection module 13 for connecting the input power supply.

[0063] Specifically, the spare incoming line port 16 is arranged at the back of the frequency converter 1 and can be directly connected to the input power supply or directly connected to the direct output port 312. As introduced above, when three all-in-one machines are connected in series, only two of the all-in-one machines need to be equipped with the power supply and distribution device 3, and the third all-in-one machine only needs to be connected in series to the power supply and distribution device 3 on the first two all-in-one machines. The series connection mentioned here is through the spare incoming line port 16. This flexible connection method can provide multiple power supply methods for the belt conveyor system and realize flexible on-site assembly.

[0064] Although several embodiments of the present disclosure have been shown and described in this document, it is obvious to those skilled in the art that such embodiments are provided only by way of example. Those skilled in the art can think of many changes, alterations, and alternative ways without departing from the spirit and idea of the present disclosure. It should be understood that various alternative solutions to the embodiments of the present disclosure described herein can be adopted during the practice of the present disclosure. The appended claims are intended to define the protection scope of the present disclosure and thus cover equivalent or alternative solutions within the scope of these claims.

Claims

1. A permanent magnet variable frequency integrated machine, comprising a frequency converter and a permanent magnet motor, the permanent magnet motor extending forward and backward along its axial direction, and the frequency converter being integrated on the circumferential side of the permanent magnet motor, characterized in that, A power supply and distribution device is also provided on the peripheral side of the permanent magnet motor. The power supply and distribution device is detachably connected to the frequency converter and is used to provide electrical energy for electrical equipment.

2. The permanent magnet variable frequency integrated machine according to claim 1, wherein The power supply and distribution device includes a box body and ports provided on the box body. The ports include: An input port, which is connected to the power supply; A direct output port, which is electrically connected to the input port and is used to directly output the input power supply; An indirect output port, which is electrically connected to the input port and is connected to the permanent magnet motor through the frequency converter.

3. The permanent magnet variable frequency integrated machine according to claim 2, wherein Multiple groups of transformers are provided inside the power supply and distribution device. The multiple groups of transformers are electrically connected to the input port and the other electrical equipment to convert the voltage of the input power supply into the voltage required by the other electrical equipment.

4. The permanent magnet variable frequency integrated machine according to claim 3, characterized in that, A disconnect switch and a vacuum contactor are provided inside the power supply and distribution device. The multiple groups of transformers and the indirect output port are connected to the input port through the disconnect switch and the vacuum contactor to disconnect the faulty circuit.

5. The permanent magnet variable frequency integrated machine according to claim 3, characterized in that A control element is provided inside the power supply and distribution device. The control element is used to control the current under the voltage to enter the other electrical equipment.

6. The permanent magnet variable frequency integrated machine according to claim 3, characterized in that, The power supply and distribution device further includes a plurality of output ports. The multiple groups of transformers and the other electrical equipment are connected through the plurality of output ports.

7. The permanent magnet variable frequency integrated machine according to claim 1, wherein, The frequency converter includes: A frequency conversion module: which is connected to the permanent magnet motor and is used to convert the frequency of the input power supply into different frequencies for output; A control module: arranged on the upper layer of the frequency conversion module to control the frequency conversion module; A protection module: including a fuse, a reactor and a contactor, connected to the input power supply or the power supply and distribution device, and is used to protect the frequency conversion module.

8. The permanent magnet variable frequency integrated machine according to claim 7, wherein, The frequency conversion module is arranged on a water-cooled heat dissipation plate, and the water-cooled heat dissipation plate is provided with an S-shaped heat dissipation water channel.

9. The permanent magnet variable frequency integrated machine according to claim 7, characterized in that, The frequency conversion module includes a power module and a filter capacitor module. The power module and the filter capacitor module are connected by a laminated busbar to reduce the parasitic inductance.

10. The permanent magnet variable frequency integrated machine according to claim 9, characterized in that, The power module includes a rectification module and an inversion module. The rectification module and the inversion module are electrically connected. The rectification module is connected to the protection module, and the inversion module is connected to the permanent magnet motor.

11. The permanent magnet variable frequency integrated machine according to claim 9, characterized in that, The power module includes an insulating frame arranged around it, which is used to isolate the high-voltage power supply and can make the power module dissipate heat evenly.

12. The permanent magnet variable frequency integrated machine according to claim 7, wherein, The frequency converter includes at least one spare incoming line port, which is arranged on the side wall of the frequency converter and is connected to the protection module and is used to connect the input power supply.

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