Permanent magnet and variable frequency integrated machine

Abstract

A permanent magnet and variable frequency integrated machine, comprising a variable-frequency drive and a permanent magnet electric motor, wherein the permanent magnet electric motor extends forwards and backwards in its axial direction; the variable-frequency drive is integrated on a peripheral side of the permanent magnet electric motor; a power supply and distribution apparatus is further arranged on the peripheral side of the permanent magnet electric motor; and the power supply and distribution apparatus is detachably connected to the variable-frequency drive and is used for providing electric energy for an electric device. The permanent magnet and variable frequency integrated machine uses a design concept that integrates the variable-frequency drive, the power supply and distribution apparatus and the permanent magnet electric motor, meeting the application requirement for a small volume. In addition, the variable-frequency drive and the power supply and distribution apparatus achieve a modular design, facilitating on-site replacement and maintenance. The power supply and distribution apparatus can provide electric energy for an electric device in a belt conveyor system. Moreover, due to installation space limitations and usage requirements possibly occurring on site, the power supply and distribution apparatus can be selectively disassembled, reassembled, or mounted on a different side on the basis of different application scenarios, so as to achieve the aim of simplifying an on-site power supply and distribution system, facilitating on-site use.

Description

A permanent magnet frequency conversion integrated machine CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to the Chinese patent application filed on December 27, 2023, with application number 202311829540.6 and titled “A Permanent Magnet Frequency Conversion Integrated Machine”. Technical Field

[0002] The present disclosure generally relates to the field of mining power supply and distribution technology. More specifically, the present disclosure relates to a permanent magnet frequency conversion integrated machine. Background Art

[0003] The drive system for belt conveyors in my country has evolved from a mobile substation plus a dual-speed motor and reducer, to a mobile substation plus a motor and a hydraulic coupler and reducer, to a mobile substation plus a motor and a CST (Controlled Start Transmission) drive, to a mobile substation plus a frequency converter plus an electric motor and reducer. Currently, the "mobile substation plus frequency converter plus an asynchronous motor and reducer" drive system is the dominant approach. While this approach offers advantages such as minimal impact on the mechanical and electrical systems during startup and automatic speed regulation, it still suffers from issues such as large size, low power factor, high electromagnetic interference, excessive mechanical wear, and difficult maintenance. In recent years, the combination of a mobile substation with a frequency converter and a permanent magnet direct-drive motor for mining has become the primary solution to these problems. However, with the increasing national demand for green coal mining, existing technologies for coal mine belt conveyors struggle to meet these requirements, including high incoming voltage levels, low system efficiency, limited installation space, frequent relocation and reversing of the chute conveyor, and a complex electromagnetic environment with high interference.

[0004] In view of this, there is an urgent need to provide a permanent magnet frequency conversion all-in-one solution to solve problems such as high incoming voltage level, difficult maintenance and small installation space. Summary of the Invention

[0005] In order to at least solve one or more of the technical problems mentioned above, the present disclosure proposes a permanent magnet frequency conversion all-in-one machine solution.

[0006] The present disclosure provides a permanent magnet frequency conversion integrated machine, including a frequency converter and a permanent magnet motor. The permanent magnet motor extends forward and backward along its axial direction. The frequency converter is integrated on the peripheral side of the permanent magnet motor. The peripheral side of the permanent magnet motor is also provided with a power supply and distribution device. The power supply and distribution device is detachably connected to the frequency converter and is used to provide electrical energy to electrical equipment.

[0007] In some embodiments, the power supply and distribution device includes a box and ports arranged on the box, the ports including an input port, a direct output port and an indirect output port, the input port is connected to the power supply; the direct output port is electrically connected to the input port and is used to directly output the input power; the indirect output port is electrically connected to the input port, and is connected to the permanent magnet motor through a frequency converter.

[0008] In some embodiments, a plurality of transformers are provided in the power supply and distribution device, and the plurality of transformers are electrically connected to the input port and other electrical devices to convert the voltage of the input power supply into the voltages required by the other electrical devices.

[0009] In some embodiments, an isolating switch and a vacuum contactor are provided in the power supply and distribution device, and multiple groups of transformers and indirect output ports are connected to the input port through the isolating switch to disconnect the fault circuit.

[0010] In some embodiments, a control unit is provided inside the power supply and distribution device, and the control unit is used to control the current at various voltages to flow into other electrical equipment.

[0011] In some embodiments, the power supply and distribution device further includes multiple output ports, and multiple groups of transformers are connected to other electrical equipment through the multiple output ports.

[0012] 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 a different frequency 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 is connected to the input power supply or power distribution device to protect the frequency conversion module.

[0013] In some embodiments, the frequency conversion module is disposed on a water-cooled heat sink, and the water-cooled heat sink has an S-shaped heat dissipation channel.

[0014] In some embodiments, the frequency conversion module includes a power module and a filter capacitor module, and the power module and the filter capacitor module are connected using a laminated busbar to reduce parasitic inductance.

[0015] In some embodiments, the power module includes a rectifier module and an inverter module, the rectifier module and the inverter module are electrically connected, the rectifier module is connected to the protection module, and the inverter module is connected to the permanent magnet motor.

[0016] In some embodiments, the power module includes an insulating frame disposed around the power module to isolate the high voltage power supply and enable the power module to dissipate heat evenly.

[0017] In some embodiments, the frequency converter includes at least one backup line port, which is provided on a side wall of the frequency converter and connected to the protection module for connecting to an input power source.

[0018] Through the permanent magnet frequency conversion integrated machine provided above, the disclosed embodiments adopt the design concept of integrating the frequency converter, power supply and distribution device, and permanent magnet synchronous motor, and the frequency conversion unit and power supply and distribution unit realize modular design, which facilitates on-site replacement and maintenance. The power supply and distribution device can provide power distribution for other electrical equipment in the belt conveyor system, simplifying the on-site power supply and distribution system. Due to the installation space limitations and usage requirements that may occur on-site, the power supply and distribution device can be disassembled or installed on the other side according to different application scenarios to facilitate on-site use. Furthermore, in some embodiments, by providing ports on the housing of the power supply and distribution device, electrical equipment can be quickly assembled, making the power supply and distribution device assembly faster and quickly supplying power to surrounding electrical equipment, simplifying the on-site assembly process. 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 providing multiple sets of transformers in the power supply and distribution device, the voltage of the input power supply can be converted into various voltages required by the electrical equipment, powering the surrounding electrical equipment, eliminating the need for mobile substations and simplifying the assembly process. Furthermore, in some embodiments, by providing an isolating switch and a vacuum contactor in the power supply and distribution device, not only the safety of the operator can be protected, but also the power supply and distribution device can be protected. When electricity is not needed, the circuit can be manually cut off. When a circuit fault occurs, the power can also be automatically cut off. Such double isolation protection improves safety performance. Furthermore, in some embodiments, by modularizing the frequency converter, it is easier to repair or overhaul the frequency converter. Furthermore, in some embodiments, by providing the frequency converter module on a water-cooled heat sink, the temperature of the frequency converter can be reduced, allowing 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 the input power supply or the output power supply of the power supply and distribution device, the permanent magnet frequency converter can be directly connected to an external power supply, thereby realizing the flexible assembly of the power supply and distribution device. Even if a problem occurs in one power supply and distribution device, it will not affect the use of other power supply and distribution devices and the permanent magnet frequency converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an illustrative and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0020] FIG1 shows a schematic diagram of the overall structure of a permanent magnet frequency conversion integrated machine according to an embodiment of the present disclosure;

[0021] FIG2 shows a schematic diagram of the overall structure of the power supply and distribution device according to an embodiment of the present disclosure;

[0022] FIG3 shows a block diagram of a port connection structure of a power supply and distribution device according to some embodiments of the present disclosure;

[0023] FIG4 shows a structural block diagram of a belt conveyor system according to some embodiments of the present disclosure;

[0024] FIG5 shows a block diagram of the internal structure of a power supply and distribution device according to some embodiments of the present disclosure;

[0025] FIG6 shows a schematic diagram of the internal structure of a power supply and distribution device according to some embodiments of the present disclosure;

[0026] FIG7 shows a schematic structural diagram of a power supply and distribution device AA according to some embodiments of the present disclosure;

[0027] FIG8 shows a schematic diagram of the overall structure of another permanent magnet frequency conversion integrated machine according to some embodiments of the present disclosure;

[0028] FIG9 shows a schematic structural diagram of a frequency converter box according to some embodiments of the present disclosure;

[0029] FIG10 is a schematic diagram showing the internal structure of a protective box according to some embodiments of the present disclosure;

[0030] FIG11 shows a schematic structural diagram of a frequency converter box AA according to some embodiments of the present disclosure;

[0031] FIG12 shows a schematic structural diagram of a frequency converter box BB according to some embodiments of the present disclosure;

[0032] FIG13 shows a schematic diagram of the structure of a water-cooled heat sink according to some embodiments of the present disclosure.

[0033] Reference numerals:

[0034] 1. Frequency converter; 11. Frequency converter module; 111. Power module; 1111. Rectifier module; 1112. Inverter module; 1113. Insulation sheath; 112. Filter capacitor module; 113. Water-cooled heat sink; 1131. S-shaped heat dissipation channel; 12. Control module; 13. Protection module; 131. Fuse; 132. Reactor; 133. Contactor; 134. Precharger; 14. Frequency converter box; 141. Display screen; 15. Protection box; 16. Spare line port;

[0035] 2. Permanent magnet motor;

[0036] 3. Power supply and distribution device; 31. Box; 311. Input port; 312. Direct output port; 313. Indirect output port; 314. Switch opening and closing observation frame; 32. Multiple transformers; 321. 12kV / 1.36kV transformer; 322. 12kV / 265V transformer; 323. 1.36kV / 152V transformer; 33. Disconnector; 331. Switch body; 332. Switch opening and closing; 34. Vacuum contactor; 35. Control element; 351. Circuit breaker; 3511. 1140V operating button; 3512. 127V operating button; 3513. 10kV operating button; 352. 1140V contactor; 36. Output port; 361. 1140V output port; 362. 127V output port;

[0037] 4. The first external all-in-one machine;

[0038] 5. Second external all-in-one machine;

[0039] 6. The third external all-in-one machine. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of this disclosure in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of this disclosure, not all of them. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this disclosure.

[0041] It should be understood that the terms “include” and “comprising” used in the specification and claims of the present disclosure indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0042] It should also be understood that the terminology used in this disclosure is for the purpose of describing specific embodiments only and is not intended to limit the disclosure. As used in this disclosure and the claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It should be further understood that the term "and / or" as used in this disclosure and the claims refers to any and all possible combinations of one or more of the associated listed items, including and including these combinations.

[0043] As used in this specification and claims, the term "if" can be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0044] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0045] This disclosure provides a permanent magnet frequency conversion integrated machine, as shown in Figure 1 , comprising an inverter 1 and a permanent magnet motor 2. The permanent magnet motor 2 extends forward and backward along its axial direction, and the inverter 1 is integrated around the periphery of the permanent magnet motor 2. A power supply and distribution device 3 is also provided around the periphery 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 power to electrical equipment.

[0046] Specifically, the inverter 1 is integrated around the permanent magnet motor 2. Its rectangular parallelepiped structure modularizes its internal structure, facilitating maintenance and replacement. The inverter 1 can be directly connected to high-voltage cables, such as 10 kV cables, to convert the high-voltage cable frequency to the frequency used by the permanent magnet motor 2. The permanent magnet motor 2 extends along its axial direction, forming a cylindrical structure that directly provides kinetic energy for the belt conveyor. The permanent magnet motor 2 utilizes water cooling for low noise and low pollution during operation. The permanent magnet motor 2 utilizes a four-way winding input structure, combined with the inverter 1's multi-way output structure, to minimize damage to the motor coil insulation caused by frequency conversion harmonics. The stator coil consists of four three-phase branch windings connected in parallel. The permanent magnet motor 2 and inverter 1 form an integrated device. In the following description, "integrated device" refers to the permanent magnet motor 2 with the inverter 1. The power supply and distribution device 3 can be installed on either side of the inverter 1, depending on site conditions, to provide power to the integrated device and other electrical equipment. The power supply and distribution device 3 installed on the integrated machine can solve the problem of power supply to surrounding electrical equipment. It no longer needs to install cables for surrounding electrical equipment through a mobile substation. This greatly reduces the cost of installing the power cables for the integrated machine, reduces the difficulty of construction, and saves construction time. At the same time, the permanent magnet variable frequency integrated machine is small in size, which is convenient for on-site installation. The permanent magnet variable frequency integrated machine is more convenient to lower into the well and is easy to move, so the chute belt conveyor does not need to be moved frequently.

[0047] As shown in Figures 2 to 4, preferably, the power supply and distribution device 3 includes a box body 31 and ports arranged on the box body 31, the ports including an input port 311, a direct output port 312 and an indirect output port 313, the input port 311 is connected to the power supply; the direct output port 312 is electrically connected to the input port 311 for directly outputting the input power; the indirect output port 313 is electrically connected to the input port 311, and is connected to the permanent magnet motor 2 through the inverter 1.

[0048] 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. The front and back mentioned here are based on the axial direction of the permanent magnet motor 2, and are used to plug in external cables so as not to affect the assembly of the box body 31 on the all-in-one machine. In order to minimize the size 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 empty 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 in the box body 31. That is to say, the input power enters the box body 31 through the input port 311 and then comes out from the direct output port 312 without any change in voltage. For example, if the input power supply is 10KV, then the voltage input from the input port 311 is 10KV, and the voltage output from the direct output port 312 is still 10KV. The direct output port 312 can be connected to the input port 311 of the next power supply and distribution device 3, or it can be connected to the second external all-in-one machine 5. The indirect output port 313 is set on the side wall of the box 31 near the all-in-one machine. The indirect output port 313 is connected to the first external all-in-one machine 4 to provide power to the first external all-in-one machine 4. In other words, when multiple all-in-one machines need to be operated in series, only one 10kV cable needs to be drawn from the input power supply and connected to the 10kV input port 311 of the power supply and distribution device 3 of one of the all-in-one machines. The remaining all-in-one machines can be connected in sequence through the 10kV direct output port 312, and the indirect output port 313 of the power supply and distribution device 3 supplies power to the assembled all-in-one machines. For example, the belt conveyor system is usually configured with three belt conveyors, a first external integrated machine 4, a second external integrated machine 5 and a third external integrated machine 6. When the three integrated machines need to be powered at the same time, only two of the first external integrated machine 4 and the second external integrated machine 5 need to be equipped with a power supply and distribution device 3 to meet the power needs of the equipment near the well. 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, and there is no need to configure a separate power supply and distribution device 3. This saves a device, improves work efficiency, and also reduces the occurrence of failures.

[0049] As shown in FIG5 and FIG6 , preferably, the power supply and distribution device 3 includes multiple sets of transformers 32 , which are electrically connected to the input port 311 and other electrical devices to convert the voltage of the input power supply into various voltages required by other electrical devices.

[0050] Specifically, multiple sets of transformers 32 are fixed in the box 31, including 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 1140V via the input port 311. 0KV input power, 1.36kV / 152V transformer 323 is connected to 12kV / 1.36kV transformer 321, wherein 12kV / 1.36kV transformer 321 provides power to the water cooling system, belt winding machine, tensioning machine, and iron remover in the belt conveyor system; 12kV / 265V transformer 322 provides power to the power supply and distribution device 3; 1.36kV / 152V transformer 323 provides power to the lighting system, etc. Therefore, the multiple sets of transformers 32 installed in the power supply and distribution device 3 can not only provide power to the all-in-one machine, but also provide power to other equipment in the belt conveyor system, providing great convenience for power supply underground. Of course, other transformers can also be used, and there is no restriction here, as long as they meet the power needs underground.

[0051] As shown in FIG5 to FIG8, preferably, the power supply and distribution device 3 is provided with an isolating switch 33 and a vacuum contactor 34, and multiple sets of transformers 32 and indirect output ports 313 are connected to the input port 311 through the isolating switch 33 to disconnect the fault circuit.

[0052] Specifically, the input power enters the housing 31 from the input port 311, with one path directly outputting through the direct output port 312. The other path connects to the isolating switch 33 and vacuum contactor 34, and then connects to multiple transformers 32 or to the indirect output port 313. The isolating switch 33 is a manual disconnect switch, comprising a switch body 331 and a trip / close switch 332. The switch body 331 is disposed within the housing, while the trip / close switch 332 is disposed on the outside of the side wall of the housing 31. An opening / closing observation frame 314 is disposed on the outside of the side wall of the housing 31 for maintenance personnel to observe the opening and closing of the switch body 331 within the housing 31. The isolating switch 33 can disconnect all circuits within the housing 31, excluding the circuit outputted from the direct output port 312. If the power distribution device 3 malfunctions and becomes unusable, it will not affect the power supply to the next integrated device. Of course, disconnecting the entire circuit when maintenance is required will not affect the operation of the next integrated device, thus protecting the normal operation of the belt conveyor system while ensuring the safety of maintenance personnel. The vacuum contactor 34 is an automatic switch that will automatically disconnect when a circuit fault occurs. This dual switch design concept provides dual protection for the power supply and distribution device 3, maintenance personnel, and the belt conveyor system.

[0053] As shown in FIG. 5 to FIG. 7 , preferably, the power supply and distribution device 3 is internally provided with a control element 35 , and the control element 35 is used to control the current at each voltage to flow into other electrical equipment.

[0054] Specifically, the control element 35 includes a circuit breaker 351 and an 1140V contactor 352, which are integrated into the side wall of the box 31. The circuit breaker 351 and the 1140V contactor 352 are both switches. The circuit breaker 351 is a switch manually controlled by the 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 breakers 351 and the 1140V contactors 352 to control different power outputs. If a part of the equipment circuit fails, the faulty line can be cut off without affecting the normal operation of other electrical equipment. The 1140V contactor 352 is set on the inner side wall of the box 31, and the 1140V contactor 352 of the circuit 1140 is set here. It is used to protect the power supply and distribution device 3 when the circuit is short-circuited. The control unit of the circuit breaker 351 is located on the inner sidewall of the housing 31, and the operating buttons are located on the outer sidewall of the housing 31. As shown in Figure 1, for ease of operation by the operator, the sidewall referred to here is preferably the rear sidewall of the power distribution device 3. The operating buttons may include three 1140V operating buttons 3511 to control three 1140V power outputs; two 127V operating buttons 3512 to control two 127V power outputs; and two 10KV operating buttons 3513 to control the outputs of the direct output port 312 and the indirect output port 313. The number of circuit breakers 351 is determined by the amount of output power and is not limited here. Each operating button is a flameproof structure, meeting Class I explosion-proof requirements for coal mines.

[0055] As shown in FIG. 2 , preferably, the power supply and distribution device 3 further includes a plurality of output ports 36 , and the plurality of transformers 32 are connected to other electrical equipment via the plurality of output ports 36 .

[0056] Specifically, output ports 36 are neatly arranged above input port 311 and direct output port 312. Output ports 36 connect to multiple transformers 32 and serve as power output ports. Output ports 36 can include an 1140V output port 361 and a 127V output port 362 for connecting to external power devices. Of course, there can be more output ports 36, and this is not a limitation. The provision of output ports 36 eliminates the need for operators to learn how to use power supply and distribution device 3; they only need to remember the plug-in locations. This reduces the time it takes to power surrounding power devices using power supply and distribution device 3 on-site, improving work efficiency.

[0057] As shown in Figures 8 to 12, preferably, the inverter 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 frequency outputs; 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, an inductor 132 and a contactor 133, which is connected to the input power supply or the power supply and distribution device 3 to protect the frequency conversion module 11.

[0058] Specifically, the frequency conversion module 11, control module 12, and protection module 13 all adopt a modular design. The frequency conversion module 11 and control module 12 are set in the same frequency conversion box 14, and the protection module 13 is separately set in the protection box 15. The frequency conversion box 14 is set on the peripheral side of the permanent magnet motor 2. The control module 12 is set 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 set on the lower layer of the control module 12. A display screen 141 is set 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. It includes a fuse 131, a reactor 132, and a contactor 133. It also includes a precharger 134 to provide power to the contactor 133. The power supply and distribution device 3 is connected to the inverter 1, first passing through the fuse 131, then through the reactor 132, and then through the contactor 133, and finally entering the inverter module 11. Then, through the inverter module 11, it enters the permanent magnet motor 2. The modular design of each part facilitates on-site replacement and maintenance.

[0059] As shown in FIG. 12 and FIG. 13 , preferably, the frequency conversion module 11 is disposed on a water-cooled heat sink 113 , and the water-cooled heat sink 113 has an S-shaped heat dissipation channel 1131 .

[0060] Specifically, the inverter module 11 is a high-heat-generating component. During operation, the high heat generated by the inverter module 11 can affect the efficiency of the inverter 1. Heat dissipation from the inverter 1 is necessary. This is achieved by using a water-cooled heat sink 113 with an S-shaped cooling channel 1131. Cooling water in the channel flows through the bottom of the heat-generating module, removing heat and meeting the heat dissipation requirements of the high-heat-generating component.

[0061] As shown in FIG. 11 and FIG. 12 , 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.

[0062] Specifically, the frequency conversion module 11 uses a laminated busbar to directly connect the power module 111 and the filter capacitor module 112, making the parasitic inductance smaller and effectively cutting off the interference of the power bus on the control circuit. Among them, the power module 111 includes a rectifier module 1111 and an inverter module 1112. The rectifier module 1111 and the inverter module 1112 are distributed on both sides of the water-cooled heat sink 113 and are electrically connected. The rectifier module 1111 converts AC current into DC current and is connected to the protection module 13. The inverter module 1112 converts DC current into AC current and is connected to the permanent magnet motor 2. Preferably, an insulating sheath 1113 is provided outside the rectifier module 1111 and the inverter 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 set at the bottom and the insulating frame is set at the periphery to ensure uniform heat dissipation of the power module 111 and prevent local high temperature explosion.

[0063] As shown in FIG8 , preferably, the frequency converter 1 includes at least one backup line port 16 , which is provided on a side wall of the frequency converter 1 and connected to the protection module 13 for connecting to the input power supply.

[0064] Specifically, the backup incoming line port 16 is located behind the inverter 1 and can be directly connected to the input power supply or the direct output port 312. As described above, when three all-in-one units are connected in series, only two of them need to be equipped with the power supply and distribution device 3. The third all-in-one unit only needs to be connected in series to the power supply and distribution devices 3 of the first two all-in-one units. The series connection mentioned here refers to the series connection through the backup incoming line port 16. This flexible connection method can provide multiple power supply methods for the belt conveyor system, realizing flexible on-site assembly.

[0065] Although a plurality of embodiments of the present disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art may conceive of many modifications, changes, and alternatives without departing from the ideas and spirit of the present disclosure. It should be understood that in practicing the present disclosure, various alternatives to the embodiments of the present disclosure described herein may be adopted. The appended claims are intended to define the scope of protection of the present disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A permanent magnet variable frequency integrated machine, comprising an inverter and a permanent magnet motor, the permanent magnet motor extending axially forward and backward, and the inverter 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 circumferential 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 access 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 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 disconnecting 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 disconnecting switch and the vacuum contactor to disconnect the faulty circuit.

5. The permanent magnet variable frequency integrated machine according to claim 3, wherein 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, wherein 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 2, 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, connecting 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, characterized in that, 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, wherein, 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, wherein, 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 for connecting the input power supply.

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