Mining explosion-proof type high-voltage permanent-magnet synchronous frequency conversion and speed regulation all-in-one machine

Abstract

The invention belongs to the technical field of mining motors, and particularly relates to a mining flame-proof type high-voltage permanent magnet synchronous frequency conversion and speed regulation all-in-one machine, which comprises a permanent magnet synchronous frequency conversion motor and a lifting device, and is characterized in that the lifting device comprises a bottom plate, a connecting seat, a fixed seat, a screw rod, a ball nut and a lifting mechanism; the connecting base is fixedly installed on the left side of the upper portion of the bottom plate, the fixing base is fixedly installed on the right side of the upper portion of the bottom plate, the permanent magnet synchronous variable frequency motor is fixedly installed on the right side of the fixing base, the output end of the permanent magnet synchronous variable frequency motor is fixedly connected with the lead screw, the lead screw is connected with a bearing on the right side of the connecting base, and the ball nut is connected to the outer side of the lead screw in a sleeving mode. According to the device, the problems that a coal bunker falls off from a lifting device and the mining safety and the mining efficiency are affected due to the fact that an internal motor of the lifting device adopted when a current forklift transports a coal pile cannot achieve intelligent torque control are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of mining motors, and in particular relates to a mining explosion-proof high-voltage permanent magnet synchronous variable frequency speed regulating integrated machine. Background Art

[0002] Flameproof high-voltage permanent magnet synchronous variable frequency speed control integrated machine is mostly used in coal mining. During coal mining, the excavated coal is first placed in the coal bunker, and then transported out of the coal bunker by forklift. At this time, an elevator is needed to transport the coal bunker. The coal bunker is placed on the elevator so that after the coal bunker is full of coal, it needs to be shoveled out by a forklift. By controlling the height of the coal bunker to adapt to the blade height of the forklift, the work efficiency is improved. The flameproof high-voltage permanent magnet synchronous variable frequency speed control integrated machine is installed on the elevator to drive the elevator up and down;

[0003] At present, the control of the flameproof high-voltage permanent magnet synchronous variable frequency speed regulating integrated machine cannot accurately control its instantaneous torque, which causes the coal bunker to fall from the elevator when the elevator lifts the coal bunker, resulting in poor lifting stability and low efficiency, which greatly affects the transportation efficiency of the coal mine. This phenomenon has become a problem that needs to be solved urgently by people in this field. Summary of the invention

[0004] The purpose of the present invention is to provide a flameproof high-voltage permanent magnet synchronous variable frequency speed regulating integrated machine for mining, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a mine-use explosion-proof high-voltage permanent magnet synchronous frequency conversion speed regulation integrated machine, comprising a permanent magnet synchronous frequency conversion motor and a lifting device, the lifting device comprising a base plate, a connecting seat, a fixing seat, a screw rod, a ball nut and a lifting mechanism; the connecting seat is fixedly installed on the upper left side of the base plate, the fixing seat is fixedly installed on the upper right side of the base plate, the permanent magnet synchronous frequency conversion motor is fixedly installed on the right side of the fixing seat, and the output end is fixedly connected to the screw rod, the screw rod is connected to the right side bearing of the connecting seat, the ball nut is sleeved on the outside of the screw rod, and the two are connected by a ball, so The lifting mechanism includes two slide rails, two sliders, two fixed blocks, two groups of shaft rods, a number of pins and a support plate. The two sliders are respectively fixedly installed on the front and rear sides of the ball nut, and are respectively slidably connected to the two slide rails. The two slide rails are both fixedly installed above the bottom plate. The two fixed blocks are both fixedly installed above the bottom plate and are arranged opposite to each other. There are two groups of shaft rods in each group, and the middle of each group of shaft rods is connected by a pin. The lower ends of the two groups of shaft rods are respectively connected to the slider and the fixed block by a pin. The upper ends of the two groups of shaft rods are connected to the bottom of the support plate by a pin. A coal bunker is placed above the support plate.

[0006] The present invention further illustrates that the lifting device includes an intelligent drive system, which includes a data identification module, a data conversion module and a torque drive module. The data identification module includes a weight identification unit and a vibration frequency identification unit; the data conversion module is electrically connected to the data identification module and the torque drive module respectively, and the torque drive module is electrically connected to the permanent magnet synchronous variable frequency motor. The data conversion module is arranged in the support plate, and the data identification module is used to identify various data, and the data conversion module is used to convert the identified data and convert it into torque data of the permanent magnet synchronous variable frequency motor. The torque drive module is used to control the instantaneous torque of the permanent magnet synchronous variable frequency motor according to the torque data, and the weight identification unit is used to identify the weight of the coal pile in the coal bin, and the vibration frequency identification unit is used to identify the external vibration frequency to which the lifting device is subjected.

[0007] The present invention further illustrates that the operation steps of the intelligent drive system include: step S1, after the coal pile in the coal bunker is placed, the intelligent drive system is operated; step S2, the weight of the coal pile in the coal bunker is identified by the weight identification unit, and the instantaneous torque of the permanent magnet synchronous variable frequency motor is controlled according to the weight of the coal pile, and the external vibration frequency of the lifting device is identified by the vibration frequency identification unit, and the instantaneous torque of the permanent magnet synchronous variable frequency motor is optimized according to the external vibration frequency, when the weight of the coal pile is large, step S3 is entered, when the weight of the coal pile is small, step S4 is entered, and when the weight of the coal pile is normal, step S5 is entered; step S3, the overall center of gravity of the lifting device is stable, and the influence of the external vibration frequency is low, thereby optimizing the instantaneous torque of the permanent magnet synchronous variable frequency motor, that is, relatively increasing the instantaneous torque of the motor; step S4, the overall center of gravity of the lifting device is unstable, and the influence of the external vibration frequency is large. At this time, the whole device is tilted by vibration, the inclination is measured, and then the instantaneous torque of the permanent magnet synchronous variable frequency motor is optimized according to the inclination; step S5, the average value of the instantaneous torque in step S3 and step S4 is taken, so that the torque of the permanent magnet synchronous variable frequency motor remains stable, that is, the output is stable.

[0008] The present invention further illustrates that in step S2, N is the instantaneous torque of the permanent magnet synchronous variable frequency motor, N max is the maximum instantaneous torque of the permanent magnet synchronous variable frequency motor, G is the weight of the coal pile,

[0009] G max It is the maximum weight of coal pile that can be stacked in the coal bunker; that is, the heavier the coal pile, the greater the instantaneous torque of the permanent magnet synchronous variable frequency motor.

[0010] The present invention further illustrates that in step S2, N 1 is the instantaneous torque of the permanent magnet synchronous variable frequency motor optimized after being affected by the external vibration frequency, H is the external vibration frequency, H maxis the maximum external vibration frequency; that is, the greater the external vibration frequency, the greater the vibration intensity, which makes the instantaneous torque of the permanent magnet synchronous variable frequency motor smaller, and the instantaneous torque of the permanent magnet synchronous variable frequency motor is optimized.

[0011] The present invention further illustrates that in step S2 and step S3: when G>G mid When G mid The weight of the coal bunker after it is half filled with coal: N 2 The instantaneous torque of the permanent magnet synchronous variable frequency motor is optimized when the weight of the coal pile is heavy; that is, the instantaneous torque of the permanent magnet synchronous variable frequency motor is optimized again to increase its instantaneous torque, and the increased instantaneous torque data is much lower than the instantaneous torque of the permanent magnet synchronous variable frequency motor that is reduced after being affected by the external vibration frequency.

[0012] The present invention further illustrates that in step S2 and step S4: when G <G mid When: the external vibration frequency has a great influence, the inclination of the lifting device is measured, that is, X is the inclination of the lifting device, X max is the maximum inclination of the lifting device, N 3 It is the instantaneous torque of the permanent magnet synchronous variable frequency motor under the influence of the inclination of the lifting device; that is, the higher the vibration frequency, the greater the vibration intensity, and the more inclined the lifting device is, the smaller the instantaneous torque of the permanent magnet synchronous variable frequency motor is by reducing the instantaneous torque of the permanent magnet synchronous variable frequency motor.

[0013] The present invention further illustrates that in step S2 and step S5: when G=G mid hour:

[0014] That is, take the average instantaneous torque of the permanent magnet synchronous variable frequency motor when the coal pile weight is high and low.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the lifting device and intelligent drive system adopted by the present invention can lift the coal bunker where coal is piled, so that the forklift can be conveniently transported out of the coal mine, and the operation is automated, convenient and efficient, which greatly improves the coal transportation efficiency. For lighter weight, the instantaneous torque of the permanent magnet synchronous variable frequency motor is reduced, so that the speed of the support plate lifting is slower, and the coal bunker is prevented from falling off the support plate due to excessive lifting strength, which plays a role in stabilizing the lifting. For heavier weight of the coal bunker, the instantaneous torque of the permanent magnet synchronous variable frequency motor is increased, so that the coal bunker can be lifted quickly, the lifting strength is guaranteed, the transportation efficiency of the coal pile is improved, and the work efficiency is improved. For a large vibration frequency of the lifting mechanism, the instantaneous torque of the permanent magnet synchronous variable frequency motor is relatively greatly reduced, so that the lifting speed of the support plate can be further reduced, and the coal bunker is prevented from falling due to vibration, and the stability is greatly improved. Otherwise, the instantaneous torque of the permanent magnet synchronous variable frequency motor is slightly reduced, and the lifting force of the support plate is insufficient to affect the lifting speed, which plays a role in ensuring work efficiency.

[0016] When the coal pile is heavier, its center of gravity is more stable, and the instantaneous torque of the permanent magnet synchronous frequency conversion motor is optimized, so that its torque under the influence of the vibration frequency is relatively increased, but the increase is not large, that is, it is guaranteed that there is enough force to lift the coal bunker, and it can relatively avoid the coal bunker falling due to excessive lifting speed, or the coal pile falling from the coal bunker. The work safety performance is greatly improved. When the coal pile is lighter, its center of gravity is unstable and affected by the external vibration frequency, and the lifting device tilts. The higher the vibration intensity, the greater the inclination of the lifting device, and the easier it is for the coal bunker to fall, thereby further reducing the instantaneous torque of the permanent magnet synchronous frequency conversion motor, which can avoid the coal bunker falling due to excessive lifting speed to the greatest extent, and further improve stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the module connection relationship of the intelligent drive system of the present invention;

[0020] In the figure: 1, permanent magnet synchronous variable frequency motor; 2, bottom plate; 21, connecting seat; 22, fixing seat; 23, screw rod; 24, ball nut; 25, slide rail; 26, slider; 27, fixing block; 28, shaft rod; 29, support plate. DETAILED DESCRIPTION

[0021] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-2 The present invention provides a technical solution: a flameproof high-voltage permanent magnet synchronous variable frequency speed regulating integrated machine for mining, comprising a permanent magnet synchronous variable frequency motor 1 and a lifting device, the lifting device comprising a bottom plate 2, a connecting seat 21, a fixing seat 22, a screw rod 23, a ball nut 24 and a lifting mechanism;

[0023] The connecting seat 21 is fixedly installed on the upper left side of the base plate 2, the fixing seat 22 is fixedly installed on the upper right side of the base plate 2, the permanent magnet synchronous variable frequency motor 1 is fixedly installed on the right side of the fixing seat 22, and the output end is fixedly connected to the screw rod 23, the screw rod 23 is connected to the right side bearing of the connecting seat 21, the ball nut 24 is sleeved on the outer side of the screw rod 23, and the two are connected by a ball, the lifting mechanism includes two slide rails 25, two sliders 26, two fixing blocks 27, two sets of shaft rods 28, a plurality of pins and a support plate 29, and the two sliders 26 are fixed respectively. The two fixing blocks 27 are fixedly installed on the front and rear sides of the ball nut 24, and are slidably connected with the two slide rails 25 respectively. The two slide rails 25 are fixedly installed on the top of the bottom plate 2. The two fixing blocks 27 are fixedly installed on the top of the bottom plate 2 and are arranged opposite to each other. Two sets of shaft rods 28 are provided with two, and the middle of each set of shaft rods 28 is connected by a pin shaft. The lower ends of the two sets of shaft rods 28 are respectively connected with the slider 26 and the fixing block 27 by a pin shaft. The upper ends of the two sets of shaft rods 28 are connected with the bottom of the support plate 29 by a pin shaft. A coal bunker is arranged above the support plate 29.

[0024] The operator places the coal bunker on the support plate 29, then digs the coal and pours the coal into the coal bunker. When the coal pile in the coal bunker is piled up, the forklift is driven to the lifting device position. At this time, the permanent magnet synchronous variable frequency motor 1 runs, driving the screw rod 23 to rotate. The screw rod 23 makes the ball nut 24 move left and right on the screw rod 23 through the ball. The ball nut 24 drives the two sliders 26 to move left and right on the slide rail 25 to provide stability. The slider 26 drives the shaft rod 28 to change the angle through the pin shaft. Two of the shaft rods 28 are fixed in position by the fixed block 27, and the other two shaft rods 28 are lifted by the movement of the slider 26, so that the coal bunker rises. At this time, the forklift can be convenient to transport the coal bunker out of the coal mine. The operation is automated, convenient and efficient, which greatly improves the coal transportation efficiency.

[0025] The lifting device includes an intelligent driving system, which includes a data identification module, a data conversion module and a torque driving module, and the data identification module includes a weight identification unit and a vibration frequency identification unit;

[0026] The data conversion module is electrically connected to the data identification module and the torque drive module respectively. The torque drive module is electrically connected to the permanent magnet synchronous variable frequency motor 1. The data conversion module is arranged in the support plate 29. The data identification module is used to identify various data. The data conversion module is used to convert the identified data and convert it into torque data of the permanent magnet synchronous variable frequency motor 1. The torque drive module is used to control the instantaneous torque of the permanent magnet synchronous variable frequency motor 1 according to the torque data. The weight identification unit is used to identify the weight of the coal pile in the coal bin. The vibration frequency identification unit is used to identify the external vibration frequency to which the lifting device is subjected.

[0027] The operation steps of the intelligent drive system include:

[0028] Step S1: After the coal pile in the coal bunker is placed, the intelligent drive system is operated;

[0029] Step S2, identifying the weight of the coal pile in the coal bunker through the weight identification unit, controlling the instantaneous torque of the permanent magnet synchronous variable frequency motor 1 according to the weight of the coal pile, and identifying the external vibration frequency of the lifting device through the vibration frequency identification unit, and optimizing the instantaneous torque of the permanent magnet synchronous variable frequency motor 1 according to the external vibration frequency, when the weight of the coal pile is large, entering step S3, when the weight of the coal pile is small, entering step S4, and when the weight of the coal pile is normal, entering step S5;

[0030] Step S3, the overall center of gravity of the lifting device is stable, and the influence of external vibration frequency is low, so as to optimize the instantaneous torque of the permanent magnet synchronous variable frequency motor 1, that is, relatively increase the instantaneous torque of the motor;

[0031] Step S4, the overall center of gravity of the lifting device is unstable and the external vibration frequency has a great influence. At this time, the entire device is tilted by vibration, the inclination is measured, and then the instantaneous torque of the permanent magnet synchronous variable frequency motor 1 is optimized according to the inclination;

[0032] Step S5, taking the average value of the instantaneous torque in step S3 and step S4, so that the torque of the permanent magnet synchronous variable frequency motor 1 remains stable, that is, the output is stable.

[0033] In step S2, N is the instantaneous torque of the permanent magnet synchronous variable frequency motor 1, N max is the maximum instantaneous torque of the permanent magnet synchronous variable frequency motor 1, G is the weight of the coal pile, G max The maximum weight of coal that can be stored in the coal bunker;

[0034] That is, the heavier the coal pile is, the greater the instantaneous torque of the permanent magnet synchronous variable frequency motor 1 is;

[0035] For lighter weight, the instantaneous torque of the permanent magnet synchronous frequency conversion motor 1 is reduced, so that the speed of lifting the support plate 29 is slower, avoiding the coal bunker from falling off the support plate 29 due to excessive lifting strength, and playing a role in stabilizing the lifting. For heavier weight of the coal bunker, the instantaneous torque of the permanent magnet synchronous frequency conversion motor 1 is increased, so that the coal bunker can be lifted quickly, the lifting strength is guaranteed, the transportation efficiency of the coal pile is improved, and the work efficiency is improved.

[0036] In step S2, N 1 is the instantaneous torque of the permanent magnet synchronous variable frequency motor 1 optimized after being affected by the external vibration frequency, H is the external vibration frequency, H max It is the maximum vibration frequency in the outside world;

[0037] That is, the greater the external vibration frequency, the greater the vibration intensity, so that the instantaneous torque of the permanent magnet synchronous variable frequency motor 1 is smaller, and the instantaneous torque of the permanent magnet synchronous variable frequency motor 1 is optimized;

[0038] If the vibration frequency of the lifting mechanism is relatively large, the instantaneous torque of the permanent magnet synchronous frequency conversion motor 1 will be relatively greatly reduced, so that the lifting speed of the support plate 29 can be further reduced to prevent the coal bin from falling due to vibration, and the stability is greatly improved. On the contrary, the instantaneous torque of the permanent magnet synchronous frequency conversion motor 1 will be slightly reduced to avoid the lifting force of the support plate 29 being insufficient to affect the lifting speed, thereby ensuring work efficiency.

[0039] In step S2 and step S3:

[0040] When G>G mid When G mid The weight of the coal bunker after it is half filled with coal: N 2 The instantaneous torque of the permanent magnet synchronous variable frequency motor 1 optimized for heavy coal piles;

[0041] That is, the instantaneous torque of the permanent magnet synchronous variable frequency motor 1 is optimized again, and its instantaneous torque is increased, and the increased instantaneous torque data is much lower than the instantaneous torque of the permanent magnet synchronous variable frequency motor 1 that is reduced after being affected by the external vibration frequency;

[0042] When the coal pile is heavier, its center of gravity is more stable, and the instantaneous torque of the permanent magnet synchronous variable frequency motor 1 is optimized, so that its torque under the influence of the vibration frequency is relatively increased, but the increase is not large, that is, it is ensured that there is enough force to lift the coal bunker, and it can relatively avoid the coal bunker falling due to the lifting speed being too fast, or the coal pile falling from the coal bunker, and the work safety performance is greatly improved.

[0043] In step S2 and step S4:

[0044] When G <G midWhen: the external vibration frequency has a great influence, the inclination of the lifting device is measured, that is, X is the inclination of the lifting device, X max is the maximum inclination of the lifting device, N 3 is the instantaneous torque of the permanent magnet synchronous variable frequency motor 1 under the influence of the inclination of the lifting device;

[0045] That is, the higher the vibration frequency, the greater the vibration intensity, and the more inclined the lifting device is, at this time, the instantaneous torque of the permanent magnet synchronous variable frequency motor 1 is reduced to make the instantaneous torque of the permanent magnet synchronous variable frequency motor 1 smaller;

[0046] When the weight of the coal pile is relatively light, its center of gravity is unstable and is affected by the external vibration frequency, causing the lifting device to tilt. The higher the vibration intensity, the greater the inclination of the lifting device, and the easier it is for the coal bin to fall, thereby further reducing the instantaneous torque of the permanent magnet synchronous frequency conversion motor 1, and avoiding the coal bin from falling due to excessive lifting speed to the greatest extent, and further improving stability.

[0047] In step S2 and step S5:

[0048]

[0049] That is, take the average instantaneous torque of the permanent magnet synchronous variable frequency motor 1 when the weight of the coal pile is high and low;

[0050] When the weight of the coal pile remains normal and stable, the instantaneous torque of the permanent magnet synchronous frequency conversion motor 1 is in an intermediate state, and the instantaneous torque is neither high nor low. On the one hand, it saves the operating energy consumption of the permanent magnet synchronous frequency conversion motor 1, and on the other hand, it can ensure the lifting efficiency, and the stability can also be further guaranteed.

[0051] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0052] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flameproof high-voltage permanent magnet synchronous variable frequency speed regulating integrated machine for mining, comprising a permanent magnet synchronous variable frequency motor (1) and a lifting device, characterized in that: The lifting device comprises a base plate (2), a connecting seat (21), a fixing seat (22), a screw rod (23), a ball nut (24) and a lifting mechanism; The connecting seat (21) is fixedly mounted on the upper left side of the base plate (2), the fixing seat (22) is fixedly mounted on the upper right side of the base plate (2), the permanent magnet synchronous variable frequency motor (1) is fixedly mounted on the right side of the fixing seat (22), and the output end is fixedly connected to the screw rod (23), the screw rod (23) is connected to the right side bearing of the connecting seat (21), the ball nut (24) is sleeved on the outer side of the screw rod (23), and the two are connected by a ball, the lifting mechanism comprises two slide rails (25), two sliders (26), two fixing blocks (27), two sets of shaft rods (28), a plurality of pins and a support plate (29), the two sliders (2 6) are respectively fixedly mounted on the front and rear sides of the ball nut (24), and are respectively slidably connected to the two slide rails (25), the two slide rails (25) are both fixedly mounted above the bottom plate (2), the two fixed blocks (27) are both fixedly mounted above the bottom plate (2), and are arranged opposite to each other, two sets of shaft rods (28) are each provided with two, and the middle of each set of shaft rods (28) is connected by a pin, the lower ends of the two sets of shaft rods (28) are respectively connected to the slider (26) and the fixed block (27) by a pin, and the upper ends of the two sets of shaft rods (28) are both connected to the bottom of the support plate (29) by a pin, and a coal bunker is arranged above the support plate (29).

2. The flameproof high-voltage permanent magnet synchronous variable frequency speed regulating integrated machine for mining use according to claim 1, characterized in that: The lifting device includes an intelligent driving system, which includes a data identification module, a data conversion module and a torque driving module, and the data identification module includes a weight identification unit and a vibration frequency identification unit; The data conversion module is electrically connected to the data identification module and the torque drive module respectively; the torque drive module is electrically connected to the permanent magnet synchronous variable frequency motor (1); the data conversion module is arranged in the support plate (29); the data identification module is used to identify various data; the data conversion module is used to convert the identified data into torque data of the permanent magnet synchronous variable frequency motor (1); the torque drive module is used to control the instantaneous torque of the permanent magnet synchronous variable frequency motor (1) according to the torque data; the weight identification unit is used to identify the weight of the coal pile in the coal bin; and the vibration frequency identification unit is used to identify the external vibration frequency to which the lifting device is subjected.

3. The flameproof high-voltage permanent magnet synchronous variable frequency speed regulating integrated machine for mining use according to claim 2, characterized in that: The operation steps of the intelligent drive system include: Step S1: After the coal pile in the coal bunker is placed, the intelligent drive system is operated; Step S2, identifying the weight of the coal pile in the coal bunker through the weight identification unit, and controlling the instantaneous torque of the permanent magnet synchronous variable frequency motor (1) according to the weight of the coal pile, and at the same time identifying the external vibration frequency of the lifting device through the vibration frequency identification unit, and optimizing the instantaneous torque of the permanent magnet synchronous variable frequency motor (1) according to the external vibration frequency, when the weight of the coal pile is large, entering step S3, when the weight of the coal pile is small, entering step S4, and when the weight of the coal pile is normal, entering step S5; Step S3, the overall center of gravity of the lifting device is stable, and the influence of external vibration frequency is low, so as to optimize the instantaneous torque of the permanent magnet synchronous variable frequency motor (1), that is, relatively increase the instantaneous torque of the motor; Step S4, the overall center of gravity of the lifting device is unstable and the external vibration frequency has a great influence. At this time, the entire device is tilted by vibration, the tilt is measured, and then the instantaneous torque of the permanent magnet synchronous variable frequency motor (1) is optimized according to the tilt; Step S5, taking the average value of the instantaneous torque in step S3 and step S4, so that the torque of the permanent magnet synchronous variable frequency motor (1) remains stable, that is, the output is stable.

4. The flameproof high-voltage permanent magnet synchronous variable frequency speed regulating integrated machine for mining use according to claim 3, characterized in that: In the step S2, N is the instantaneous torque of the permanent magnet synchronous variable frequency motor (1), N max is the maximum instantaneous torque of the permanent magnet synchronous variable frequency motor (1), G is the weight of the coal pile, G max The maximum weight of coal that can be stored in the coal bunker; That is, the heavier the coal pile is, the greater the instantaneous torque of the permanent magnet synchronous variable frequency motor (1) is.

5. The flameproof high-voltage permanent magnet synchronous variable frequency speed regulating integrated machine for mining use according to claim 4, characterized in that: In the step S2, N1 is the instantaneous torque of the permanent magnet synchronous variable frequency motor (1) optimized after being affected by the external vibration frequency, H is the external vibration frequency, H max It is the maximum vibration frequency in the outside world; That is, the greater the external vibration frequency, the greater the vibration intensity, thereby making the instantaneous torque of the permanent magnet synchronous variable frequency motor (1) smaller, thereby optimizing the instantaneous torque of the permanent magnet synchronous variable frequency motor (1).

6. The flameproof high-voltage permanent magnet synchronous variable frequency speed regulating integrated machine for mining use according to claim 5, characterized in that: In the steps S2 and S3: When G>G mid When G mid The weight of the bunker after half of the coal is stored: N2 is the instantaneous torque of the optimized permanent magnet synchronous variable frequency motor (1) when the coal pile weight is large; That is, the instantaneous torque of the permanent magnet synchronous variable frequency motor (1) is optimized again, and its instantaneous torque is increased, and the increased instantaneous torque data is much lower than the instantaneous torque of the permanent magnet synchronous variable frequency motor (1) that is reduced after being affected by the external vibration frequency.

7. The flameproof high-voltage permanent magnet synchronous variable frequency speed regulating integrated machine for mining use according to claim 6, characterized in that: In the steps S2 and S4: When G <G mid When: the external vibration frequency has a great influence, the inclination of the lifting device is measured, that is, X is the inclination of the lifting device, X max is the maximum inclination of the lifting device, N3 is the instantaneous torque of the permanent magnet synchronous variable frequency motor (1) under the influence of the inclination of the lifting device; That is, the higher the vibration frequency, the greater the vibration intensity, and the more inclined the lifting device is, at this time, by reducing the instantaneous torque of the permanent magnet synchronous variable frequency motor (1), the instantaneous torque of the permanent magnet synchronous variable frequency motor (1) is made smaller.

8. The flameproof high-voltage permanent magnet synchronous variable frequency speed regulating integrated machine for mining use according to claim 7, characterized in that: In the steps S2 and S5: When G = G mid hour: That is, the instantaneous torque average value of the permanent magnet synchronous variable frequency motor (1) is taken when the weight of the coal pile is high and low.

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