CN117277303A - Permanent magnet synchronous frequency conversion integrated machine and power supply system - Google Patents

Abstract

This application provides a permanent magnet synchronous frequency conversion integrated machine and power supply system. The permanent magnet synchronous frequency conversion all-in-one machine includes: a power supply located in the casing, which is used to replace the mobile substation as a power supply; a power frequency auxiliary circuit located in the casing, electrically connected to the power supply, and the power frequency auxiliary circuit includes The power supply interface is used to replace the interface of the mobile substation and is electrically connected to the mining equipment through cables. The power supply supplies power to the mining equipment through the power supply interface. The permanent magnet synchronous frequency conversion integrated machine no longer needs to lay a mobile substation to supply power to mining equipment. The power supply and power supply interface are directly set in the permanent magnet synchronous frequency conversion integrated machine, so that the mining equipment can be connected to the permanent magnet synchronous frequency conversion integrated machine through cables. The power supply interface is connected, and the power supply supplies power to the mining equipment directly through the power supply interface, which greatly reduces the time cost and labor cost.

Description

Permanent magnet synchronous frequency conversion integrated machine and power supply system

Technical field

This application relates to the technical field of mining integrated frequency conversion machines. Specifically, it relates to a permanent magnet synchronous frequency conversion integrated machine and a power supply system.

Background technique

The permanent magnet synchronous frequency conversion integrated machine is a new type of power equipment that is widely used in mining transportation systems. At present, in belt conveyors and scraper conveyors, mining explosion-proof and intrinsically safe permanent magnet synchronous frequency conversion integrated machines have been widely used. The permanent magnet synchronous frequency conversion integrated machines are used as the main drive motors and have two voltage levels: 1140V and 3300V. kind, and need to supply power to mining equipment through power supply cables and mobile substations. However, this complex operation requires a lot of time and labor costs to lay the mobile substation. Therefore, mobile substations are currently used to power mining equipment. The cost of power supply is higher.

Contents of the invention

The main purpose of this application is to provide a permanent magnet synchronous frequency conversion integrated machine and power supply system to at least solve the problem of high cost in the prior art of using mobile substations to power mining equipment.

In order to achieve the above object, according to one aspect of the present application, a permanent magnet synchronous frequency conversion all-in-one machine is provided, including: a housing; a power supply located in the housing, and the power supply is used to replace a mobile substation as a power supply; A power frequency auxiliary circuit is located in the housing. The power frequency auxiliary circuit is electrically connected to the power supply. The power frequency auxiliary circuit includes a power supply interface. The power supply interface is used to replace the interface of the mobile substation. The cable is electrically connected to the mining equipment, and the power supply supplies power to the mining equipment through the power supply interface. The mining equipment includes one or more of a belt conveyor, a magnetic separator, and a sensor.

Optionally, the permanent magnet synchronous frequency conversion all-in-one machine also includes: a first circuit breaker, electrically connected to the 10kV high-voltage interface, and the first circuit breaker is used to implement overload protection and short-circuit protection of the 10kV high-voltage power supply.

Optionally, the permanent magnet synchronous variable frequency integrated machine further includes a frequency converter, and the frequency converter includes: a first relay including a first end and a second end, and the first end of the first relay is connected to the first end. The circuit breaker is electrically connected, and the first relay is used to control the on-off of the 10kV high-voltage power supply according to electric energy, wherein the electric energy is a current value and/or a voltage value; a rectifier filter circuit and the first relay The second end is electrically connected, and the rectification and filtering circuit is used to rectify and/or filter the electrical signal of the 10kV high-voltage power supply.

Optionally, the power frequency auxiliary circuit includes: a first power supply unit, used to power the mining equipment using a voltage of 1140V; and a second power supply unit, used to power the mining equipment using a voltage of 127V.

Optionally, the first power supply unit includes: a first transformer for converting 10kV high voltage into a voltage of 1140V; a first protection module including a first end and a second end, and the first end of the first protection module The first end of the first protection module is electrically connected to the first transformer, the second end of the first protection module is electrically connected to the 1140V power supply interface, and the first protection module is used to protect the first power supply unit.

Optionally, the first protection module includes: a second circuit breaker including a first end and a second end, the first end of the second circuit breaker is electrically connected to the first transformer, and the second circuit breaker The second relay is used to realize overload protection and short-circuit protection of the first power supply unit; the second relay includes a first end and a second end, and the first end of the second relay is electrically connected to the second end of the second circuit breaker. connection, the second end of the second relay is electrically connected to the first 1140V power supply interface, and the second relay is used to control the first 1140V power supply interface in the first power supply unit according to the current value and/or voltage value. The third relay includes a first end and a second end. The first end of the third relay is electrically connected to the second end of the second circuit breaker. The third relay has a first end and a second end. The two ends are electrically connected to the second 1140V power supply interface, and the third relay is used to control the on and off of the line where the second 1140V power supply interface is located in the first power supply unit according to the current value and/or voltage value; fourth A relay includes a first end and a second end. The first end of the fourth relay is electrically connected to the second end of the second circuit breaker. The second end of the fourth relay is electrically connected to the third 1140V power supply interface. connection, the fourth relay is used to control the on/off of the line where the third 1140V power supply interface in the first power supply unit is located according to the current value and/or voltage value.

Optionally, the second power supply unit includes: a second transformer for converting the voltage of 1140V into a voltage of 127V; a third circuit breaker including a first end and a second end, and the third circuit breaker has a first end and a second end. One end is electrically connected to the second transformer, and the second end of the third circuit breaker is electrically connected to the 127V power supply interface. The third circuit breaker is used to implement overload protection and short-circuit protection of the second power supply unit.

Optionally, the housing includes: a first housing that includes one or more of a filter, a motor, and a frequency converter; and a second housing in which the power frequency auxiliary circuit is located. In the second housing, the second housing is detachably fixed on the first housing.

Optionally, the first housing and the second housing are detachably fixed together by bolts.

According to another aspect of the present application, a power supply system is provided, including: a permanent magnet synchronous frequency conversion integrated machine, which is any one of the permanent magnet synchronous frequency conversion integrated machines; mining equipment, It is electrically connected to the permanent magnet synchronous frequency conversion integrated machine.

Applying the technical solution of this application, it is no longer necessary to lay a mobile substation to supply power to mining equipment. The power supply and power supply interface are directly set in the permanent magnet synchronous frequency conversion integrated machine, so that the mining equipment can be integrated with the permanent magnet synchronous frequency conversion through cables. The power supply interface of the machine is connected, and the power supply supplies power to the mining equipment directly through the power supply interface, which greatly reduces time costs and labor costs.

Description of the drawings

The description and drawings that constitute a part of this application are used to provide a further understanding of this application. The illustrative embodiments and their descriptions of this application are used to explain this application and do not constitute an improper limitation of this application. In the attached picture:

Figure 1 shows a schematic electrical principle diagram of a permanent magnet synchronous frequency conversion all-in-one machine provided in an embodiment of the present application;

Figure 2 shows a schematic diagram of the front view of the permanent magnet synchronous frequency conversion all-in-one machine;

Figure 3 shows a schematic diagram of the appearance of the permanent magnet synchronous frequency conversion integrated machine when viewed from above;

Figure 4 shows a top view of the appearance of the permanent magnet synchronous frequency conversion all-in-one machine;

Figure 5 shows a three-dimensional schematic diagram of the permanent magnet synchronous frequency conversion all-in-one machine;

Figure 6 shows a schematic rear view of the permanent magnet synchronous frequency conversion integrated machine.

Among them, the above-mentioned drawings include the following reference signs:

10. The first 10kV output power supply interface; 11. The second 10kV output power supply interface; 12. 127V control power supply interface; 13. 1140V control power supply interface; 14. The first motor part; 15. Transformer part; 16. The second motor part; 17. The third motor part.

Detailed ways

It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

In order to enable those in the technical field to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only These are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the scope of protection of this application.

It should be noted that the terms "first", "second", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that data so used may be interchanged where appropriate for the embodiments of the application described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, e.g., a process, method, system, product, or apparatus that encompasses a series of steps or units and need not be limited to those explicitly listed. Those steps or elements may instead include other steps or elements not expressly listed or inherent to the process, method, product or apparatus.

As introduced in the background art, the cost of using mobile substations to supply power to mining equipment in the prior art is relatively high. In order to solve the above problems, embodiments of the present application provide a permanent magnet synchronous frequency conversion integrated machine and power supply. system.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The solution of this application provides a permanent magnet synchronous frequency conversion all-in-one machine, as shown in Figure 1, including:

case;

A power supply is located in the above-mentioned housing, and the above-mentioned power supply is used to replace the mobile substation as a power supply;

The power frequency auxiliary circuit is located in the above-mentioned housing. The above-mentioned power frequency auxiliary circuit is electrically connected to the above-mentioned power supply. The above-mentioned power frequency auxiliary circuit includes a power supply interface. The above-mentioned power supply interface is used to replace the interface of the above-mentioned mobile substation and electrically connect to the mining equipment through cables. The power supply supplies power to the mining equipment through the power supply interface. The mining equipment includes one or more of a belt conveyor, a magnetic separator and a sensor.

In this solution, there is no longer a need to lay a mobile substation to supply power to mining equipment. The power supply and power supply interface are directly set up in the permanent magnet synchronous frequency conversion machine, so that the mining equipment can be powered by the cable and the permanent magnet synchronous frequency conversion machine. Interface connection, the power supply supplies power to mining equipment directly through the power supply interface, which greatly reduces time costs and labor costs.

The current mobile substation is relatively large in size and is very inconvenient to install on site. In this application, the permanent magnet synchronous frequency conversion all-in-one machine is improved and the permanent magnet synchronous frequency conversion all-in-one machine is directly used to supply power to mining equipment. The permanent magnet synchronous frequency conversion machine The size of the all-in-one machine is smaller than that of the substation, and the permanent magnet synchronous frequency conversion all-in-one machine can be frequently disassembled and assembled to meet the requirements of use.

There is no power supply part in the current permanent magnet synchronous frequency conversion all-in-one machine. In some cases, power supply needs to be provided for surrounding equipment. Therefore, if there is no power frequency auxiliary circuit in the equipment, a mobile substation needs to be arranged on site for power supply, which cannot meet the on-site requirements. Power supply for other devices.

In the solution of this application, three 1140V and two 127V power frequency auxiliary circuits can be designed to meet the power supply requirements of other auxiliary designs of the belt conveyor, such as belt conveyor tensioning device motor, belt winding device, iron remover, cooling Power supply requirements for devices and other equipment. The all-in-one machine is designed with one inlet and one outlet connection port. For example, a belt conveyor uses three drive modes. The high-voltage switch cabinet supplies power to the No. 1 all-in-one machine, and the No. 1 all-in-one machine supplies power to the No. 2 all-in-one machine, and so on, reducing The high-voltage switchgear of the substation in the panel area was installed.

In the specific implementation plan, as shown in Figure 1, the above-mentioned permanent magnet synchronous frequency conversion all-in-one machine also includes a first circuit breaker QF1. The first circuit breaker is electrically connected to the 10kV high-voltage interface. The above-mentioned first circuit breaker is used to realize the 10kV high-voltage power supply. Overload protection and short circuit protection.

In this plan, a first circuit breaker is installed in the permanent magnet synchronous frequency conversion machine. When the current in the 10kV high-voltage power supply exceeds the rated current of the circuit breaker, the circuit breaker will automatically trip and cut off the circuit to prevent overloading of the 10kV high-voltage power supply and avoid Overheating of wires can even cause fires. When a short-circuit fault occurs in the 10kV high-voltage power supply, the circuit breaker can quickly cut off the 10kV high-voltage power supply to prevent excessive current from causing wire burning or equipment damage, and protect the safety of the 10kV high-voltage power supply.

Specifically, there is usually a thermal relay or thermal magnetic protection device inside the circuit breaker. When the current exceeds the rated value, the thermal relay or thermal magnetic protection device will generate overheating, triggering the circuit breaker to trip and cut off the 10kV high-voltage power supply. There is usually an electromagnetic protection device inside the circuit breaker. When the current suddenly increases to a very high value, the electromagnetic protection device will sense the instantaneous current, trigger the circuit breaker to trip, and cut off the 10kV high-voltage power supply.

Specifically, the 10kV permanent magnet variable frequency synchronous integrated machine is a new type of power equipment that can directly obtain 10kV voltage power supply from the panel substation without the need to move the substation on site, simplifying the on-site power supply and distribution system. The direct power supply method of the all-in-one machine can reduce power transmission losses and improve energy utilization. The all-in-one machine has efficient and stable power conversion technology, which makes power transmission more stable and reliable, and can also significantly reduce power loss.

In the specific implementation plan, as shown in Figure 1, the above-mentioned permanent magnet synchronous frequency conversion all-in-one machine also includes a frequency converter. The above-mentioned frequency converter includes a first relay KM1 and a rectifier filter circuit VFD. The first relay includes a first end and a second end. The first end of the above-mentioned first relay is electrically connected to the above-mentioned first circuit breaker. The above-mentioned first relay is used to control the on-off of the above-mentioned 10kV high-voltage power supply according to electric energy, wherein the above-mentioned electric energy is a current value and/or a voltage value; rectification and filtering The circuit is electrically connected to the second end of the above-mentioned first relay, and the above-mentioned rectifier and filter circuit is used to rectify and/or filter the electrical signal of the above-mentioned 10kV high-voltage power supply.

In this solution, a first relay is set up in the permanent magnet synchronous frequency converter. The first relay can control the on and off of the 10kV high-voltage power supply according to the electric energy. This can realize automatic control of the frequency converter. When the electric energy is abnormal, the first relay The relay can cut off the high-voltage power supply in time to avoid damage to the frequency converter. The permanent magnet synchronous frequency conversion all-in-one machine is equipped with a rectification and filtering circuit, which can rectify and/or filter the electrical signal. By rectifying the electrical signal, the electrical signal can be rectified. The AC signal is converted into a DC signal to facilitate subsequent processing and analysis. By filtering the electrical signal, the noise, interference or unnecessary frequency components in the input signal can be reduced or reduced, and the quality and accuracy of the signal can be improved.

Specifically, when the control conditions are met, the contacts of the relay are closed and the power is turned on at this time. When the control conditions are not met, the contacts of the relay are opened and the power is turned off. The control conditions can be determined by changes in the size of the electric energy, for example The voltage value is greater than a certain threshold or less than a certain threshold.

Specifically, the frequency converter also includes a first switch K1, a second switch K2, and a third switch K3, and the switching of the circuit can be controlled by switching the switches on and off. The frequency converter also includes a first resistor R1, a second resistor R2 and a third resistor R3.

The frequency converter also includes a fuse F1 and an inductor L. The fuse F1 is used to protect the circuit and equipment from overcurrent damage. When the current in the circuit exceeds the rated current set by the fuse, the fuse will open quickly. circuit, blocking the flow of current to prevent circuits and equipment from being damaged or even causing a fire due to overcurrent. Inductor L is used to store and release electrical energy and control changes in current and voltage.

Specifically, the rectifier and filter circuit includes multiple diodes, capacitor C, capacitor C1 and multiple power switching devices.

In order to ensure that the permanent magnet synchronous frequency conversion all-in-one machine can provide more comprehensive power supply services, the above-mentioned power frequency auxiliary circuit of this application includes a first power supply unit and a second power supply unit. The first power supply unit is used to use a voltage of 1140V to power the above-mentioned mining equipment. Power supply; the second power supply unit is used to supply power to the above-mentioned mining equipment using a voltage of 127V.

In this solution, the industrial frequency auxiliary circuit of the permanent magnet synchronous frequency conversion machine can provide 1140V voltage power supply and 127V voltage power supply, which can basically meet the power supply needs to further ensure that the permanent magnet synchronous frequency conversion machine can provide different voltages for mining equipment. For power supply, of course, the voltage values are not limited to 1140V and 127V, and can also be other voltage values.

Specifically, the power frequency auxiliary circuit of the permanent magnet synchronous frequency converter includes two circuits, 1140V and 127V, which are connected in parallel internally. The incoming and outgoing lines adopt high-voltage isolation quick-break devices, which can be equipped with circuit breakers and can realize manual breaking functions on the equipment. , provide protection for the integrated permanent magnet synchronous frequency conversion, design one inlet and one outlet connection port, simplify the power supply system, only one 10kV power supply from the panel substation is provided to the all-in-one machine, one belt conveyor and several all-in-one machines are connected in series Provide 10kV power supply. Standard explosion-proof socket plugs are used for the power frequency auxiliary circuit and control cable wiring to ensure the use process and safety of the equipment.

In some embodiments, as shown in Figure 1, the above-mentioned first power supply unit includes a first transformer-T2 and a first protection module. The first transformer is used to convert 10kV high voltage into a voltage of 1140V; the first protection module includes a first The first end of the above-mentioned first protection module is electrically connected to the above-mentioned first transformer, the second end of the above-mentioned first protection module is electrically connected to the 1140V power supply interface, and the above-mentioned first protection module is used to protect the above-mentioned first Power supply unit.

In this solution, a first transformer is set up in the permanent magnet synchronous frequency conversion machine. Since some mining equipment requires a lower voltage to operate normally, the use of the first transformer can convert high voltage into low voltage to ensure the normal operation of the mining equipment. During operation, a first protection module is set in the permanent magnet synchronous frequency conversion all-in-one machine. The first protection module can protect the safety of the first power supply unit and avoid damage to the first power supply unit.

The transformer is composed of two coils (ie, main coil and secondary coil) and an iron core. The main coil (high-voltage coil) is connected to the high-voltage power supply, and the secondary coil (low-voltage coil) is connected to the load device. When high voltage passes through the main coil, due to the magnetic induction coupling effect, a corresponding voltage will be generated in the secondary coil, realizing voltage conversion. Depending on the ratio of the transformer's coil turns, voltage conversion from high voltage to low voltage can be achieved.

In some embodiments, as shown in Figure 1, the above-mentioned first protection module includes a second circuit breaker QF2, a second relay KM2, a third relay KM3 and a fourth relay KM4. The second circuit breaker includes a first end and a second end, the first end of the above-mentioned second circuit breaker is electrically connected to the above-mentioned first transformer, the above-mentioned second circuit breaker is used to implement overload protection and short-circuit protection of the above-mentioned first power supply unit; the second relay includes a first end and a second end, The first end of the above-mentioned second relay is electrically connected to the second end of the above-mentioned second circuit breaker, and the second end of the above-mentioned second relay is electrically connected to the first 1140V power supply-X1. The above-mentioned second relay is used to adjust the current value and/or Or the voltage value controls the on/off of the line where the first 1140V power supply interface in the above-mentioned first power supply unit is located; the third relay includes a first end and a second end, and the first end of the above-mentioned third relay and the above-mentioned second circuit breaker The second end is electrically connected. The second end of the third relay is electrically connected to the second 1140V power supply interface. The third relay is used to control the second 1140V power supply interface in the first power supply unit according to the current value and/or voltage value. -On and off of the line where X2 is located; the fourth relay includes a first end and a second end. The first end of the above-mentioned fourth relay is electrically connected to the second end of the above-mentioned second circuit breaker. Electrically connected to the third 1140V power supply interface, the fourth relay is used to control the on/off of the line where the third 1140V power supply interface-X3 is located in the first power supply unit according to the current value and/or the voltage value.

In this solution, a second circuit breaker is set up in the first protection module. When the current in the first power supply unit exceeds the rated current of the circuit breaker, the circuit breaker will automatically trip and cut off the circuit to prevent overloading of the first power supply unit and avoid wires. Overheating can even cause a fire. When a short-circuit fault occurs in the first power supply unit, the circuit breaker can quickly cut off the first power supply unit to prevent excessive current from causing burnt wires or equipment damage, and protect the safety of the first power supply unit. In the first protection module Multiple relays are set up in it, each relay is electrically connected to a power supply interface, so that the relay can control the on and off of the first power supply unit according to the electric energy, so that the automatic control of the first power supply unit can be realized. When the electric energy is abnormal, The relay can cut off the first power supply unit in time to avoid damage to the first power supply unit.

In some implementations, as shown in Figure 1, the above-mentioned second power supply unit includes a second transformer-T3 and a third circuit breaker QF3. The second transformer is used to convert the voltage of 1140V to a voltage of 127V; the third circuit breaker includes The first end and the second end, the first end of the above-mentioned third circuit breaker is electrically connected to the above-mentioned second transformer, the second end of the above-mentioned third circuit breaker is electrically connected to the 127V power supply interface, the above-mentioned third circuit breaker is used to realize the above-mentioned third circuit breaker. Overload protection and short circuit protection of the second power supply unit.

In this solution, a second transformer is set up in the second power supply unit. Since some mining equipment requires lower voltage to operate normally, the use of the second transformer can convert high voltage into low voltage to ensure the normal operation of the mining equipment. A third circuit breaker is installed in the second power supply unit. When the current in the second power supply unit exceeds the rated current of the circuit breaker, the circuit breaker will automatically trip and cut off the circuit to prevent overloading of the second power supply unit, avoid overheating of wires and even cause a fire. When a short-circuit fault occurs in the second power supply unit, the circuit breaker can quickly cut off the second power supply unit to prevent wire burning or equipment damage caused by excessive current and protect the safety of the second power supply unit.

Specifically, there are two 127V power supply interfaces, namely the first 127V power supply interface-X4 and the second 127V power supply interface-X5.

In addition, the second power supply unit may also include fuse-F3.

Specifically, the permanent magnet synchronous frequency conversion all-in-one machine includes a total of 3 1140V circuits and 2 127V circuits, which can provide more comprehensive services, so that it can supply power to 5 mining equipment at the same time. Of course, you can continue to add circuits to power the mining equipment. Power supply for larger quantities of mining equipment.

The permanent magnet synchronous frequency conversion all-in-one machine has a 10kV main power supply circuit, and the all-in-one machines are connected in series to provide power, making the power supply more stable and reliable.

In addition, a PLC controller can be added to the permanent magnet synchronous frequency conversion machine to improve the intelligence of the permanent magnet synchronous frequency conversion machine, so that the permanent magnet synchronous frequency conversion machine has the function of self-judgment of equipment faults.

In some implementations, the above-mentioned housing includes a first housing and a second housing, and the above-mentioned first housing includes one or more of a filter, a motor and a frequency converter; the above-mentioned power frequency auxiliary circuit is located in the above-mentioned second housing. In the housing, the second housing is detachably fixed on the first housing.

In this solution, by setting up multiple shells, different equipment or circuits are located in different shells, so that the permanent magnet synchronous frequency conversion all-in-one machine can be designed in a modular manner for easy installation and use.

At present, as the depth of underground coal mine mining deepens, problems such as ventilation and drainage are becoming more and more prominent. Therefore, the volume and center height of the equipment are very important for use in coal mines and need to be designed according to the actual working environment. However, the current permanent magnet synchronous frequency conversion all-in-one machine has a high center height and cannot meet the special working conditions of coal mines.

Therefore, the center height, appearance size and appearance function module design of the all-in-one machine can be made reasonable, and the universal, standardized and modular design of the all-in-one machine can be realized to meet the requirements of on-site use.

The current modular design of the permanent magnet synchronous frequency conversion all-in-one machine is insufficient. The advantage of modular design is that it can reduce maintenance costs and downtime, and improve the availability of the equipment. However, the modular design of the mining explosion-proof and intrinsically safe permanent magnet synchronous variable frequency speed regulating machine may make it difficult to maintain and replace parts and lead to long downtime.

Therefore, the all-in-one machine of this application realizes standardized and modular design, reduces the center height, makes the appearance design more reasonable and smaller, and meets the requirements of on-site use; at the same time, through the design of multiple auxiliary circuits and inlet and outlet wiring ports, the complexity of the equipment is reduced Reduce performance and maintenance costs, and improve system reliability and efficiency.

The permanent magnet synchronous frequency conversion all-in-one machine provided by this application can include components such as filters, motors, frequency converters, and power frequency auxiliary circuits. These components are closely integrated through integrated design to achieve simple installation and use. As shown in Figure 2, Figure 3, Figure 4, Figure 5 and Figure 6, the entire structure adopts a modular combination design, in which the four module units of motor, frequency conversion control, power frequency and transformer, and input and output lines can realize integrated connection and are equipped with Quick plug-in and individually sealed connections. In this way, the permanent magnet synchronous frequency conversion integrated machine can be composed of multiple modules, so that the disassembly, assembly and maintenance of the permanent magnet synchronous frequency conversion integrated machine are more convenient to adapt to different working conditions.

As shown in Figure 2, the power supply interface includes the first 10kV output power interface 10, the second 10kV output power interface 11, the 127V control power interface 12 and the 1140V control power interface 13.

As shown in Figure 3, the modular design of the permanent magnet synchronous variable frequency integrated machine can be divided into a first motor part 14, a transformer part 15, a second motor part 16 and a third motor part 17. The circuits and structures contained in the transformer part and each motor part are not limited, as long as they can be designed in a modular manner.

The permanent magnet synchronous frequency conversion all-in-one machine adopts four modular designs, which are distributed according to functions. It is easy and fast to replace and repair. When the power frequency module is not needed, it can be dismantled and used, which is in line with the diversity of equipment use.

The use of permanent magnet synchronous frequency conversion all-in-one machines can greatly save equipment maintenance costs and labor costs. The integrated design of permanent magnet synchronous frequency conversion all-in-one machines greatly reduces the failure rate of equipment, reduces the workload of equipment maintenance and replacement, and reduces the workload of enterprises. It reduces the human burden and also improves the safety and stability of the equipment.

Power frequency and transformer modules can be quickly added and disassembled according to different usage requirements. After the modules are added and disassembled, the entire integrated electrical equipment still complies with the corresponding safety regulations and explosion-proof requirements.

Specifically, the filter can be designed to reduce motor noise and electromagnetic interference, and filter components can be used to reduce noise to reduce the potential harm caused by electromagnetic interference to the equipment.

Specifically, the motor can adopt the direct supply form of 10kV voltage level to improve equipment efficiency and power density. The inverter adopts (DTC) direct torque control strategy to improve output inverter performance. The permanent magnet synchronous frequency conversion all-in-one machine can realize multi-drive collaborative control. For power balance control, its power imbalance is ≤2%. The all-in-one machine has a limiter adjustment function for output torque and speed (proportional and fixed value) in any range. .

In an optional embodiment, the first housing and the second housing are detachably fixed together through bolts. Of course, it is not limited to the detachable fixing method of bolts. The first shell and the second shell can also be detachably fixed together through threads, locks, pins, magnets, etc.

Specifically, the first shell and the second shell of the present application are detachable. If either shell is disassembled, a steel plate or other explosion-proof plate can be added to the disassembled part, so that a 10kV mine can be provided. Use explosion-proof and intrinsically safe permanent magnet synchronous frequency conversion speed regulation integrated machine model.

The appearance and size design of the permanent magnet synchronous frequency conversion integrated machine of this application are relatively reasonable and can be adapted to the coal mine environment.

Of course, in order to ensure the safety of the permanent magnet synchronous variable frequency integrated machine, a temperature sensor and water cooling equipment can also be added to the permanent magnet synchronous variable frequency integrated machine to detect the temperature of the permanent magnet synchronous variable frequency integrated machine when it is running. If the temperature is higher, it can be controlled Water-cooling equipment cools the permanent magnet synchronous frequency conversion machine to avoid damage caused by excessive temperature of the permanent magnet synchronous frequency conversion machine.

In some solutions, mining equipment needs to be powered through power supply cables and mobile substations. These complex operations not only waste time and manpower, but can also easily lead to safety hazards due to improper installation and disassembly of equipment. Therefore, it has become very necessary to research and develop a permanent magnet synchronous frequency conversion integrated machine based on 10kV voltage.

The permanent magnet synchronous frequency conversion integrated machine of this application can directly obtain 10kV voltage power supply from the panel substation without moving the substation on site, thereby simplifying the use and installation of the equipment and improving the stability of power transmission. This permanent magnet synchronous frequency conversion all-in-one machine has only one 10kV main power supply circuit and is powered in series. At the same time, this all-in-one machine not only has a main power supply circuit, but also has 3 channels of 1140V and 2 channels of 127V power frequency auxiliary circuits, providing users with more comprehensive services. By using the permanent magnet synchronous frequency converter, the complexity of the power supply and distribution system can be reduced, while the stability of power transmission can be improved, and it will have higher efficiency and more comprehensive service capabilities, which will have a great impact on the operation and maintenance of the entire mining transportation system. positive influence.

In summary, the research and development of 10kV permanent magnet synchronous frequency conversion all-in-one machine is quite forward-looking. This permanent magnet synchronous frequency conversion all-in-one machine is expected to bring higher efficiency, more comprehensive services and more stable power transmission to the mining transportation system, providing users with a better user experience, while also reducing complexity and improving energy utilization. play an active role in efficiency and environmental protection.

This application also provides a power supply system, including a permanent magnet synchronous frequency conversion integrated machine and mining equipment. The above-mentioned permanent magnet synchronous frequency conversion integrated machine is any one of the above-mentioned permanent magnet synchronous frequency conversion integrated machines; the mining equipment is synchronized with the above-mentioned permanent magnet Frequency conversion integrated electromechanical connection.

In this power supply system, since it includes any kind of permanent magnet synchronous frequency conversion integrated machine, in this permanent magnet synchronous frequency conversion integrated machine, there is no need to lay a mobile substation to supply power to mining equipment. It is directly installed in the permanent magnet synchronous frequency conversion integrated machine. Set up the power supply and power supply interface so that the mining equipment can be connected to the power supply interface of the permanent magnet synchronous frequency conversion machine through cables, and the power supply directly supplies power to the mining equipment through the power supply interface, which greatly reduces time costs and labor costs.

From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

1). The permanent magnet synchronous frequency conversion all-in-one machine of this application no longer needs to lay a mobile substation to supply power to mining equipment. The power supply and power supply interface are directly set in the permanent magnet synchronous frequency conversion all-in-one machine, so that the mining equipment can be connected through cables. Connected to the power supply interface of the permanent magnet synchronous frequency conversion all-in-one machine, the power supply supplies power to mining equipment directly through the power supply interface, greatly reducing time and labor costs.

2) Since the power supply system of this application includes any kind of permanent magnet synchronous frequency conversion integrated machine, in this permanent magnet synchronous frequency conversion integrated machine, there is no need to lay a mobile substation to supply power to mining equipment. The power supply and power supply interface are set up in the frequency conversion integrated machine, so that mining equipment can be connected to the power supply interface of the permanent magnet synchronous frequency conversion integrated machine through cables. The power supply directly supplies power to the mining equipment through the power supply interface, which greatly reduces time costs and labor costs. .

The above descriptions are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the protection scope of this application.

Claims (10)

1. The utility model provides a synchronous frequency conversion all-in-one of permanent magnetism which characterized in that includes:

a housing;

the power supply is positioned in the shell and used for replacing a mobile transformer substation as a power supply;

the power frequency auxiliary loop is positioned in the shell and is electrically connected with the power supply, the power frequency auxiliary loop comprises a power supply interface, the power supply interface is used for replacing the interface of the mobile substation to be electrically connected with mining equipment through a cable, the power supply supplies power to the mining equipment through the power supply interface, and the mining equipment comprises one or more of a belt conveyor, a magnetic separator and a sensor.

2. The permanent magnet synchronous variable frequency all-in-one machine according to claim 1, further comprising:

the first circuit breaker is electrically connected with the 10kV high-voltage interface and is used for realizing overload protection and short-circuit protection of the 10kV high-voltage power supply.

3. The permanent magnet synchronous variable frequency all-in-one machine according to claim 2, further comprising a frequency converter, the frequency converter comprising:

the first relay comprises a first end and a second end, the first end of the first relay is electrically connected with the first circuit breaker, and the first relay is used for controlling the on-off of the 10kV high-voltage power supply according to electric energy, wherein the electric energy is a current value and/or a voltage value;

and the rectification filter circuit is electrically connected with the second end of the first relay and is used for carrying out rectification treatment and/or filtering treatment on the electric signal of the 10kV high-voltage power supply.

4. The permanent magnet synchronous variable frequency all-in-one machine according to claim 1, wherein the power frequency auxiliary circuit comprises:

the first power supply unit is used for supplying power to the mining equipment by adopting 1140V voltage;

and the second power supply unit is used for supplying power to the mining equipment by adopting 127V voltage.

5. The permanent magnet synchronous variable frequency all-in-one machine according to claim 4, wherein the first power supply unit includes:

a first transformer for converting a high voltage of 10kV to a voltage of 1140V;

the first protection module comprises a first end and a second end, wherein the first end of the first protection module is electrically connected with the first transformer, the second end of the first protection module is electrically connected with the 1140V power supply interface, and the first protection module is used for protecting the first power supply unit.

6. The permanent magnet synchronous variable frequency all-in-one machine according to claim 5, wherein the first protection module comprises:

the second circuit breaker comprises a first end and a second end, the first end of the second circuit breaker is electrically connected with the first transformer, and the second circuit breaker is used for realizing overload protection and short-circuit protection of the first power supply unit;

the second relay comprises a first end and a second end, the first end of the second relay is electrically connected with the second end of the second circuit breaker, the second end of the second relay is electrically connected with the first 1140V power supply interface, and the second relay is used for controlling the on-off of a circuit where the first 1140V power supply interface is located in the first power supply unit according to a current value and/or a voltage value;

the first end of the third relay is electrically connected with the second end of the second circuit breaker, the second end of the third relay is electrically connected with the second 1140V power supply interface, and the third relay is used for controlling the on-off of a circuit where the second 1140V power supply interface is located in the first power supply unit according to a current value and/or a voltage value;

the fourth relay comprises a first end and a second end, the first end of the fourth relay is electrically connected with the second end of the second circuit breaker, the second end of the fourth relay is electrically connected with the third 1140V power supply interface, and the fourth relay is used for controlling on-off of a circuit where the third 1140V power supply interface is located in the first power supply unit according to a current value and/or a voltage value.

7. The permanent magnet synchronous variable frequency all-in-one machine according to claim 4, wherein the second power supply unit includes:

a second transformer for converting 1140V voltage into 127V voltage;

the third circuit breaker comprises a first end and a second end, the first end of the third circuit breaker is electrically connected with the second transformer, the second end of the third circuit breaker is electrically connected with the 127V power supply interface, and the third circuit breaker is used for realizing overload protection and short-circuit protection of the second power supply unit.

8. The permanent magnet synchronous variable frequency all-in-one machine according to any one of claims 1 to 7, wherein the housing includes:

a first housing including one or more of a filter, a motor, and a frequency converter therein;

the power frequency auxiliary circuit is located in the second shell, and the second shell is detachably fixed on the first shell.

9. The permanent magnet synchronous variable frequency all-in-one machine according to claim 8, wherein the first housing and the second housing are detachably fixed together by bolts.

10. A power supply system, comprising:

the permanent magnet synchronous frequency conversion all-in-one machine, which is the permanent magnet synchronous frequency conversion all-in-one machine according to any one of claims 1 to 9;

and the mining equipment is electrically and mechanically connected with the permanent magnet synchronous frequency conversion integrated machine.