A speed-adjustable sensorless motor and its control system

Abstract

The present invention discloses a speed-adjustable sensor motor and its control system, belonging to the technical field of sensor motors; the present invention includes a motor body, a cooling fan is provided at one end of the motor body, a transmission is provided at the other end of the motor body, a drive shaft is arranged through the middle of the transmission, a liquid connection box is provided at the top of one end of the motor body, and multiple groups of heat dissipation fins are arranged on the outer wall of the motor body; the present invention utilizes the coolant circulation system constructed by the transmission component to efficiently dissipate heat from the motor body, improves the efficiency by optimizing the flow path and increasing the heat dissipation area, and at the same time the cooling fan accelerates the air flow, enhances the heat far away and rapid diffusion, and improves the stability and service life of the motor; the central control unit comprehensively monitors the motor state, and through load risk analysis and multi-mode regulation, realizes segmented operation + stop, extremely regulates heat dissipation, and improves the operation efficiency and energy-saving effect of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of induction motors, and specifically to a speed-adjustable induction motor and its control system. Background Art

[0002] In the process of the rapid development of modern industry and technology, automation and intelligence have penetrated into all walks of life. As a key transmission device, induction motors continuously supply power to numerous automation systems and can be regarded as the cornerstone of industrial development. However, with the accelerating technological iteration, the original drive mode shows obvious shortcomings when facing the increasing intelligent requirements.

[0003] In many industrial scenarios, the load is constant, but the speed regulation requirements are extensive and persistent, posing great challenges to traditional variable-speed motors. Taking common operating conditions as an example, general variable-speed motors can maintain stable operation above 25HZ. However, once the frequency drops below 25HZ, various problems arise, such as weak power, a sharp rise in temperature, and even directly "stopping working" at lower frequencies. The current common solution is to directly enhance the power configuration, but this is undoubtedly drinking poison to quench thirst. Although it ensures the power supply at full Hz operation, it runs counter to energy conservation, with a large excess of energy consumption, which is contrary to the current advocated concept of green development.

[0004] Focusing on specific industrial equipment, such as the water pump field, its operating characteristics are particularly special. When the water pump is working, the head is closely related to the flow rate and the motor speed. Usually, when the speed is fixed, the head and the flow rate are relatively fixed. In many actual application scenarios, there is an urgent need to flexibly regulate the water pump flow rate. However, once the speed is changed rashly, the head will immediately change, resulting in the inability to accurately deliver the liquid to the predetermined position, seriously affecting the operation effect of the system.

[0005] In addition, variable-speed motors are generally caught in a dilemma: when operating at full load Hz, the power is strong enough to handle various working conditions; but when the frequency decreases and the load remains unchanged, the motor power torque drops sharply, and it is simply impossible to achieve frequent and smooth switching operation in the ultra-low speed and ultra-high speed ranges for a long time, greatly restricting the expansion of its application scenarios and the improvement of operation efficiency.

[0006] In summary, to break through these technical barriers that hinder industrial upgrading, it is imperative to develop a speed-adjustable induction motor and its control system, which can accurately adapt to complex and variable speed regulation requirements, ensure stable and efficient operation, and fully meet the demands of various industries for deep advancement towards intelligence and energy conservation. Summary of the Invention

[0007] The purpose of the present invention is to provide a speed-adjustable induction motor and its control system to solve the problems raised.

[0008] To achieve the above object, the present invention provides the following technical solutions: A speed-adjustable induction motor and its control system, including a motor body, a cooling fan is provided at one end of the motor body, a transmission is provided at the other end of the motor body, a drive shaft penetrates through the middle of the transmission, a liquid connection box is provided at the top of one end of the motor body, and multiple groups of heat dissipation fins are provided on the outer wall of the motor body. A liquid storage cavity and a micro pump are embedded in the inner wall of the outer peripheral wall of the transmission, and a speed sensor connected to the drive shaft is provided on the inner wall of the end face of the transmission;

[0009] Above the liquid connection box, a heat dissipation bracket is provided. At the bottom of the heat dissipation bracket, multiple groups of finned tubes close to the motor body are provided. At the top of the heat dissipation bracket, a control top box is provided. A voltage sensor and a central control unit are provided inside the control top box. Multiple groups of box covers are provided on the top of the control top box, and temperature sensors are embedded on the inner walls of both the control top box and the motor body.

[0010] Further, a sealing shaft sleeve one connected to the cooling fan is provided on the inner wall of one end of the motor body. Multiple groups of inner ribbed tubes are arranged in a circumferential array on the outer periphery of the sealing shaft sleeve one. One end of the heat dissipation fins is connected to the liquid connection box, and the other end of the heat dissipation fins is provided with a liquid pipe valve and a gas pipe valve connected to the transmission. The gas pipe valve connects the cooling fan and the air jet port.

[0011] Further, upper liquid pipes are symmetrically provided on both sides inside the liquid connection box. A lower liquid pipe is provided at the end of the liquid connection box away from the cooling fan. A cushion sleeve sleeved with the heat dissipation bracket is provided on the top of the liquid connection box.

[0012] Further, a connection disc is provided at the end of the transmission away from the motor body. A sealing shaft sleeve two extending into the interior of the motor body is provided at one end of the transmission, and the sealing shaft sleeve two is sleeved with the drive shaft. An air jet port facing the heat dissipation bracket is provided at the top of one end of the transmission. Multiple groups of liquid outlet valves, liquid inlet valves and air inlet ports are provided at the edge of one end of the transmission.

[0013] Further, a docking box is provided at the bottom of the heat dissipation bracket. Multiple groups of upper sleeves and lower sleeves are provided inside the docking box. The finned tubes are distributed at both sides of the bottom of the heat dissipation bracket, and conduits are provided at both ends of the finned tubes.

[0014] A control system for a speed-adjustable induction motor includes a central control unit. Inside the central control unit, a motor operation data acquisition module, an operation data analysis module, a load risk module and a multi-mode control core are provided:

[0015] The motor operation data acquisition module comprehensively acquires the operation-related data of the induction motor, obtains the body operation loss parameters and the body comprehensive temperature parameters therefrom, and sends them to the operation data analysis module and the load risk module respectively;

[0016] After receiving the aircraft operation damage parameters, the vehicle operation data analysis module immediately analyzes them, generates the balanced speed point JZ and the balanced power consumption point JH, and sends them to the load risk module;

[0017] After receiving the aircraft comprehensive temperature parameters, the balanced speed point JZ and the balanced power consumption point JH, the load risk module analyzes the aircraft comprehensive temperature parameters to generate the balanced electricity cost point value DBJ and the balanced control cost point value KBJ. Combining with the rectangular coordinate system, the balanced electricity cost point value DBJ, the balanced control cost point value KBJ, the balanced speed point JZ and the balanced power consumption point JH are plotted and connected and substituted into it to generate relevant control signals, and sent to the multi-mode regulation core.

[0018] Furthermore, in the process of the vehicle operation data analysis module analyzing the aircraft operation damage parameters, the total cycle duration from the beginning of the induction motor operation to the end of the last group of data collection is obtained, marked as the vehicle operation cycle. The vehicle operation cycle is evenly divided according to the total number of collected data to obtain the balanced sub-cycle. The data collected within each balanced sub-cycle is averaged to obtain the balanced cycle point J.

[0019] Furthermore, the aircraft operation damage parameters include the rotational speed value of the connection between the drive shaft and the inner rotor of the motor body, and the power consumption value of the external power supply for the operation of the induction motor only regarding the rotor operation line. The rotational speed value and the power consumption value operate according to the generation method of the balanced cycle point J to obtain the balanced speed point JZ and the balanced power consumption point JH.

[0020] Furthermore, in the process of the load risk module analyzing the aircraft comprehensive temperature parameters, the aircraft comprehensive temperature parameters include the electricity cost temperature value and the control cost temperature value. The electricity cost temperature value and the control cost temperature value operate according to the generation method of the balanced cycle point J to obtain the balanced electricity cost point value DBJ and the balanced control cost point value KBJ. Based on this, with the generation time of the balanced cycle point J as the X-axis and the data volume value as the Y-axis, a rectangular coordinate system is established. The balanced speed point JZ, the balanced power consumption point JH, the balanced electricity cost point value DBJ and the balanced control cost point value KBJ are plotted and connected in sequence on the rectangular coordinate system. The pre-stored stage range value is retrieved from the central control unit and plotted and connected in sequence on the rectangular coordinate system. The area where the four sets of plotted curves on the rectangular coordinate system conform to the stage range value according to the time process is marked as the turning point. The corresponding induction motor control scheme sequence is matched according to the stage range value of the generated turning point, and the control signal is generated according to the scheme sequence. The generated control signal is sent to the multi-mode regulation core, and the multi-mode regulation core controls the operation mode of the induction motor according to the corresponding control signal.

[0021] The beneficial effects of the present invention are:

[0022] The present invention is a coolant circulation system composed of components such as a transmission, which achieves efficient heat dissipation of the motor body. The coolant continuously flows in the circulation pipeline outside the motor, absorbs and takes away the heat generated during the operation of the motor, effectively reduces the temperature of the motor, improves its operation stability and lifespan. The heat dissipation structure not only increases the heat dissipation area of the coolant, but also improves the heat dissipation efficiency by optimizing the flow path of the coolant; the synchronous startup of the heat dissipation fan forms a unidirectional heat far - discharge trajectory, effectively accelerating the air flow of the motor body and its surrounding area, further improving the heat dissipation effect. At the same time, the design of the air duct and air jet in the heat dissipation fan can directly eject part of the air flow towards the heat dissipation fins and the top of the motor body, enhancing the air flow disturbance in the heat dissipation area and contributing to the rapid diffusion of heat.

[0023] In the present invention, through the comprehensive cooperation of the central control unit with the motor operation data acquisition module, operation data analysis module, load risk module and multi - mode regulation core, the comprehensive monitoring and intelligent regulation of the operating state of the inductive motor are achieved. According to the analysis results of the load risk module and the regulation of the multi - mode regulation core, the motor can adopt a segmented operation + stop operation mode. While maintaining the required speed range, it achieves the ultimate regulation of heat dissipation during the operation of the motor, further improving the operation efficiency and energy - saving effect of the motor.

[0024] The present invention enables the system to intelligently match and regulate the operation plan of the motor according to the actual operating conditions of the motor and external environmental conditions. It not only meets the requirements of different devices for the motor, but also improves the adaptability and flexibility of the motor. Within the frequency modulation range with sufficient torque, the system adopts a linear drive mode to ensure the operation efficiency of the motor. In the case of insufficient torque, through segmented mode operation, it ensures that the operation efficiency from the maximum frequency to the minimum frequency is linear, thus achieving an intelligent, efficient and precise operation mode. Combined with the close cooperation between the heat dissipation cycle part and the central control unit, it realizes intelligent heat dissipation control. According to the operating conditions of the motor and temperature monitoring data, the central control unit can adjust the circulation speed of the coolant and the rotation speed of the heat dissipation fan in real time to ensure that the motor always maintains within the optimal operating temperature range. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a three - dimensional view of the overall structure of the present invention;

[0027] Figure 2Schematic structural diagram of the motor body of the present invention;

[0028] Figure 3 Schematic internal structural diagram of the motor body of the present invention;

[0029] Figure 4 Schematic structural diagram of the motor body of the present invention and the liquid connection box;

[0030] Figure 5 Schematic structural diagram of the transmission of the present invention;

[0031] Figure 6 Schematic structural diagram of the heat dissipation bracket of the present invention;

[0032] Figure 7 Schematic structural diagram of the heat dissipation bracket and the control top box of the present invention;

[0033] Figure 8 Schematic diagram of the display of the system data rectangular coordinate system of the present invention.

[0034] Reference numerals: 1, motor body; 101, heat dissipation fin; 102, first sealing shaft sleeve; 103, liquid pipe valve; 104, air pipe valve; 105, inner ribbed pipe; 2, heat dissipation fan; 3, drive shaft; 4, control top box; 401, box cover; 5, transmission; 501, connecting disc; 502, jet port; 503, second sealing shaft sleeve; 6, liquid connection box; 601, upper liquid pipe; 602, lower liquid pipe; 603, gasket sleeve; 7, heat dissipation bracket; 701, docking box; 702, finned pipe; 703, conduit. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment 1: Please refer to Figure 1 - Figure 7As shown in the figure, this embodiment is a speed-adjustable induction motor, including a motor body 1. A cooling fan 2 is provided at one end of the motor body 1, and a transmission 5 is provided at the other end of the motor body 1. A drive shaft 3 passes through the middle of the transmission 5. A liquid connection box 6 is provided at the top of one end of the motor body 1. A plurality of heat dissipation fins 101 are provided on the outer wall of the motor body 1. A liquid storage cavity and a micro pump are embedded in the inner wall of the outer peripheral wall of the transmission 5. A speed sensor connected to the drive shaft 3 is provided on the inner wall of the end face of the transmission 5; the induction motor is electrically connected to an external power supply through a control top box 4 and starts under the control of an external operator. The motor body 1 operates under load according to the regulation of the external operator.

[0037] A connection disk 501 is provided at one end of the transmission 5 away from the motor body 1. A second sealing shaft sleeve 503 extending into the interior of the motor body 1 is provided at one end of the transmission 5, and the second sealing shaft sleeve 503 is sleeved on the drive shaft 3. An air jet port 502 facing the heat dissipation bracket 7 is provided at the top of one end of the transmission 5. A plurality of liquid outlet valves, liquid inlet valves and air inlet ports are provided at the edge of one end of the transmission 5.

[0038] The liquid storage cavity and the micro pump inside the transmission 5 are started simultaneously. The micro pump extracts the coolant inside the liquid storage cavity through the liquid inlet valve. The inlet and outlet ends of the micro pump are connected to the liquid outlet valve and the liquid inlet valve through pipes. The liquid outlet valve is connected to the liquid pipe valve 103. The liquid pipe valve 103 is provided with a circulation pipeline and a return pipeline. The coolant first enters the interior of the circulation pipeline. The circulation pipeline is connected to a plurality of heat dissipation fins 101, and the continuously injected coolant is dispersed inside each heat dissipation fin 101, prompting the coolant to flow from the other end to one end of the heat dissipation fin 101 until it converges at one end of the heat dissipation fin 101. And part of the coolant also enters the inner rib pipe 105. Both ends of the inner rib pipe 105 are provided with pipes connecting the heat dissipation fin 101 and the liquid connection box 6. Accordingly, a whole circulation pipeline is formed on the outer periphery of the motor body 1.

[0039] A heat dissipation bracket 7 is provided above the liquid connection box 6. A plurality of finned tubes 702 close to the motor body 1 are provided at the bottom of the heat dissipation bracket 7. A control top box 4 is provided at the top of the heat dissipation bracket 7. A voltage sensor and a central control unit are provided inside the control top box 4. A plurality of box covers 401 are provided at the top of the control top box 4. Temperature sensors are embedded on the inner walls of both the control top box 4 and the motor body 1; Upper liquid pipes 601 are symmetrically provided on both sides inside the liquid connection box 6. A lower liquid pipe 602 is provided at one end of the liquid connection box 6 away from the cooling fan 2. A gasket sleeve 603 sleeved on the heat dissipation bracket 7 is provided at the top of the liquid connection box 6.

[0040] The liquid connection box 6 is connected to the outlets at one ends of the inner ribbed tube 105 and the heat dissipation fin 101 through the upper liquid pipe 601, guiding the coolant that absorbs heat and flows inside the inner ribbed tube 105 and the heat dissipation fin 101 to be transported upward. It is guided by the upper liquid pipe 601 to enter the finned tube 702. The two ends of the finned tube 702 are connected by a conduit 703, guiding the coolant that absorbs heat to flow along a fixed trajectory. The wall of the finned tube 702 is thin and exposed to the ambient air outside the motor body 1, which helps to quickly dissipate the heat of the coolant that absorbs heat inside it. After its heat dissipation treatment, part of the conduit 703 guides the coolant that has dissipated heat along the finned tube 702 to flow back into the lower liquid pipe 602. The lower liquid pipe 602 is connected to one end of the return pipeline, and the other end of the return pipeline is connected to the inlet valve, thus forming the overall return pipeline. During the operation of the induction motor, the coolant flows along a fixed trajectory through the heat source area of the induction motor, absorbing the heat of the heat source area and guiding it to dissipate outside.

[0041] On the inner wall at one end of the motor body 1, there is a sealing shaft sleeve one 102 connected to the heat dissipation fan 2. A plurality of groups of inner ribbed tubes 105 are arranged in a circumferential array on the outer periphery of the sealing shaft sleeve one 102. One end of the heat dissipation fin 101 is connected to the liquid connection box 6, and at the other end of the heat dissipation fin 101, there are a liquid pipe valve 103 and a gas pipe valve 104 connected to the transmission 5. The gas pipe valve 104 is connected to the heat dissipation fan 2 and the jet port 502.

[0042] The heat dissipation fan starts synchronously with the induction motor. The heat dissipation fan rotates to extract the air outside one end of the motor body 1, causing a continuous negative pressure point to be formed at one end of the motor body 1, promoting the cold air at the other end of the motor body 1 and its upper and lower surroundings to flow into the heat dissipation fan 2 and be discharged from one end of the heat dissipation fan 2, forming a one-way heat remote discharge trajectory. During the operation of the heat dissipation fan, the heat dissipated from the inner ribbed tube 105, the heat dissipation fin 101 and the finned tube 702 is all sucked and remotely discharged by the heat dissipation fan 2. At the same time, a duct is provided inside the heat dissipation fan 2. The duct is connected to one end of the gas pipe valve 104, and the other end of the gas pipe valve 104 is connected to the air inlet pipe and the jet port 502, forming an internal air delivery pipeline, promoting part of the air flow to enter the inside of the jet port 502. It is guided by the jet port 502 to be sprayed towards the heat dissipation fins and the top of the motor body 1, guiding the air flow in the connection area between the heat dissipation bracket 7 and the motor body 1, and further guiding the heat generated during the operation of the induction motor to accelerate the diffusion treatment.

[0043] At the bottom of the heat dissipation bracket 7, there is a docking box 701. Inside the docking box 701, there are multiple groups of upper sleeves and lower sleeves. The finned tubes 702 are distributed at the bottom on both sides of the heat dissipation bracket 7. Both ends of the finned tubes 702 are provided with conduits 703.

[0044] Embodiment 2: Please refer to Figure 1 - Figure 8As shown in the figure, this embodiment is a control system for a speed-adjustable induction motor, including a central control unit. Inside the central control unit, there are a motor operation data acquisition module, an operation data analysis module, a load risk module, and a multi-mode control core:

[0045] At the beginning of the power-on operation of the induction motor, the central control unit generates an operation monitoring instruction and sends it to the motor operation data acquisition module. After receiving the operation supervision instruction, the motor operation data acquisition module immediately comprehensively acquires the operation-related data of the induction motor, thereby obtaining the body operation loss parameter and the body comprehensive temperature parameter, and sending them to the operation data analysis module and the load risk module respectively; among them, the body comprehensive temperature parameter is acquired by temperature sensors arranged on the inner wall of the motor body 1 and the inner wall of the control box 4, and the body operation loss parameter is comprehensively acquired by a speed sensor and a voltage sensor;

[0046] After receiving the body operation loss parameter, the operation data analysis module immediately analyzes it, generates an equilibrium speed point JZ and an equilibrium power consumption point JH, and sends them to the load risk module;

[0047] After receiving the body comprehensive temperature parameter, the equilibrium speed point JZ, and the equilibrium power consumption point JH, the load risk module analyzes the body comprehensive temperature parameter to generate an equilibrium power point value DBJ and an equilibrium control point value KBJ, and combines the rectangular coordinate system to substitute the equilibrium power point value DBJ, the equilibrium control point value KBJ, the equilibrium speed point JZ, and the equilibrium power consumption point JH into it by plotting points and connecting lines, generates relevant control signals, and sends them to the multi-mode control core.

[0048] During the analysis process of the operation data analysis module on the body operation loss parameter, the total cycle duration from the beginning of the operation of the induction motor to the end of the last group of data acquisition is obtained, which is marked as the operation cycle. The operation cycle is evenly divided according to the total number of acquired data to obtain an equilibrium sub-cycle, and the acquired data within each equilibrium sub-cycle is averaged to obtain an equilibrium cycle point J.

[0049] The body operation loss parameter includes the rotational speed value of the drive shaft 3 connected to the inner rotor of the motor body 1 and the power consumption value of the external power supply for the operation of the induction motor only regarding the rotor operation circuit. The rotational speed value and the power consumption value both operate according to the generation method of the equilibrium cycle point J to obtain the equilibrium speed point JZ and the equilibrium power consumption point JH.

[0050] The analysis process of the load risk module for the comprehensive temperature parameters of the body. The comprehensive temperature parameters of the body include the electrical base temperature value and the controlled base temperature value. The electrical base temperature value and the controlled base temperature value are operated according to the generation method of the equilibrium point J, and the equilibrium electrical base point value DBJ and the equilibrium controlled base point value KBJ are obtained. Accordingly, a rectangular coordinate system is established with the generation time of the equilibrium point J as the X-axis and the data volume value as the Y-axis. The equilibrium speed point JZ, the equilibrium consumption point JH, the equilibrium electrical base point value DBJ, and the equilibrium controlled base point value KBJ are sequentially plotted and connected by points on the rectangular coordinate system. The pre-stored stage range values are retrieved from the central control unit and plotted and continuously connected by points on the rectangular coordinate system in sequence. The area where the four sets of plotted curves on the rectangular coordinate system conform to the stage range values according to the time process is marked as the turning point. The corresponding induction motor control scheme sequence is matched according to the stage range value of the generated turning point, and a control signal is generated according to the scheme sequence. The generated control signal is sent to the multi-mode regulation core, and the multi-mode regulation core controls the operation mode of the induction motor according to the corresponding control signal.

[0051] There are two sets of stage range values set in sequence, and the turning points are as Figure 8 shown. According to the three sets of stage range values from bottom to top, two corresponding control signals are generated and marked as control signal X1 and control signal X2 from bottom to top in sequence. When generating the corresponding control signal, the multi-mode control core starts the corresponding induction motor control scheme sequence according to the matched control signal. The induction motor adopts an operation mode of segmented operation + stop without reducing the motor speed. For example, the speed of the inner rotor of the motor body 1 is 2000 revolutions per minute, and now only 1000 revolutions per minute are required. However, at this time, the head of some environments is not enough. Regarding the insufficient head, the details are as follows:

[0052] When the multi-mode control core receives control signal X1, the multi-mode control core adjusts the operation of the motor body 1 according to the induction motor scheme sequence 1 corresponding to control signal X1, adopting a two-stage operation mode, running for 15 seconds and then stopping for 15 seconds. In the way of running for 15 seconds and then stopping for 15 seconds, it is ensured that the speed is controlled within the required range per minute. During the intermittent operation, with the cooperation of the liquid heat conduction and air heat dissipation linkage method, the heat generated by the operation of the motor body 1 is extremely regulated and dissipated.

[0053] When the multi-mode control core receives control signal X2, the multi-mode control core adjusts the operation of the motor body 1 according to the induction motor scheme sequence 1 corresponding to control signal X1, adopting a four-stage operation mode, running for 7.5 seconds and then stopping for 7.5 seconds. In the way of running for 7.5 seconds and then stopping for 7.5 seconds, it is ensured that the speed is controlled within the required range per minute to meet the operation requirements. More segmented operation modes can also be set according to time, and specifically matched and regulated according to the equipment where the induction motor is installed.

[0054] Some induction motors only have solutions for insufficient low-frequency torque. In the frequency modulation range where the torque is sufficient, a linear drive mode is adopted. For example, when the operating speed meets the requirements above 25HZ, no adjustment is made; when below 25HZ and the torque is insufficient, a segmented mode is used for operation, with two or more segments in the segmented mode; for example, when the speed is 2000 revolutions per minute at 25HZ and can meet the operating requirements, but when the speed cannot meet the operating requirements below 25HZ, we use a frequency of 25HZ or above for segmented operation, so as to ensure that the operating efficiency from the maximum Hz to the minimum Hz is linear; thus achieving an intelligent, efficient and precise operating mode. The above operating mode is not limited to this, and specific adjustment and control are carried out according to the needs of the equipment assembled with the induction motor and the environmental adaptation.

[0055] Combined with Embodiment 1 and Embodiment 2, the cooling liquid circulation system constructed by the transmission 5 component of the present invention efficiently cools the motor body 1, improves the efficiency by optimizing the flow path and increasing the heat dissipation area. At the same time, the cooling fan accelerates the air flow, enhances the heat dissipation and rapid diffusion, and improves the stability and lifespan of the motor.

[0056] The central control unit comprehensively monitors the motor status, and through load risk analysis and multi-mode regulation and control, realizes segmented operation + stop, extremely regulates heat dissipation, and improves the motor operating efficiency and energy-saving effect.

[0057] The system intelligently matches the motor operation plan, adapts to the needs of different equipment and environments, adopts a linear or segmented mode drive to ensure the operating efficiency, closely cooperates with the heat dissipation cycle and the central control unit, adjusts the cooling liquid circulation and the fan speed in real time, maintains the optimal operating temperature of the motor, and realizes intelligent, efficient and precise operation.

[0058] The above content is only an example and illustration of the structure of the present invention. Those skilled in the art of this technology make various modifications or supplements to the described specific embodiments or use similar methods for substitution. As long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should fall within the protection scope of the present invention.

[0059] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in combination with this embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. Related accessories include commonly used mechanical connection components in this field such as couplings, lead screws, gears, gaskets, etc., which are not limited to this, and specific replacement and use adaptation connection methods are carried out according to actual use.

[0060] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation manners. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A speed-adjustable inductive motor, comprising a motor body (1), characterized in that: A cooling fan (2) is provided at one end of the motor body (1), a transmission (5) is provided at the other end of the motor body (1), a drive shaft (3) is provided through the middle of the transmission (5), a liquid connection box (6) is provided at the top of one end of the motor body (1), a plurality of groups of cooling fins (101) are provided on the outer wall of the motor body (1), a liquid storage cavity and a micro pump are embedded in the inner wall of the outer peripheral wall of the transmission (5), a speed sensor connected to the drive shaft (3) is provided on the inner wall of the end face of the transmission (5), and the speed sensor is installed inside the motor body (1); A heat dissipation bracket (7) is provided above the liquid connection box (6), a plurality of groups of finned tubes (702) close to the motor body (1) are provided at the bottom of the heat dissipation bracket (7), a control top box (4) is provided on the top of the heat dissipation bracket (7), a voltage sensor and a central control unit are provided inside the control top box (4), a plurality of groups of box covers (401) are provided on the top of the control top box (4), and temperature sensors are embedded on the inner walls of the control top box (4) and the motor body (1); One end of the heat dissipation fin (101) is connected to the liquid connection box (6), and the other end of the heat dissipation fin (101) is provided with a liquid pipe valve (103) and an air pipe valve (104) connected to the transmission (5). The micro pump extracts the cooling liquid inside the liquid storage cavity through the liquid inlet valve. The inlet and outlet ends of the micro pump are connected to the liquid outlet valve and the liquid inlet valve through pipelines. The liquid outlet valve is connected to the liquid pipe valve (103). The liquid pipe valve (103) is provided with a circulation pipeline and a return pipeline. The cooling liquid enters the circulation pipeline, and the circulation pipeline is connected to the multiple groups of heat dissipation fins (101).

2. The speed-adjustable inductive motor according to claim 1, characterized in that: A sealing sleeve (102) connected to the cooling fan (2) is provided on the inner wall of one end of the motor body (1), and a plurality of groups of inner rib tubes (105) are arranged in a circular array on the outer periphery of the sealing sleeve (102).

3. The speed-adjustable inductive motor according to claim 1, characterized in that: Upper liquid pipes (601) are symmetrically arranged on both sides of the liquid connection box (6), a lower liquid pipe (602) is arranged at one end of the liquid connection box (6) away from the cooling fan (2), and a cushion sleeve (603) is arranged on the top of the liquid connection box (6) and is sleeved with the cooling bracket (7).

4. The speed-adjustable inductive motor according to claim 1, characterized in that: A connecting disc (501) is provided at one end of the transmission (5) away from the motor body (1), a sealing sleeve (503) extending into the interior of the motor body (1) is provided at one end of the transmission (5), and the sealing sleeve (503) is sleeved with the drive shaft (3), and an air jet (502) facing the heat dissipation bracket (7) is provided at the top of one end of the transmission (5).

5. The speed-adjustable inductive motor according to claim 1, characterized in that: A docking box (701) is provided at the bottom of the heat dissipation bracket (7), and a plurality of groups of upper and lower sleeves are provided inside the docking box (701). The finned tubes (702) are distributed at the bottoms of both sides of the heat dissipation bracket (7), and both ends of the finned tubes (702) are provided with guide tubes (703).

6. A control system for a speed-adjustable inductive motor, used for the speed-adjustable inductive motor according to any one of claims 1 to 5, characterized in that: It includes a central control unit, which is equipped with a motor load acquisition module, a load data analysis module, a load risk module and a multi-mode control core: The motor transport acquisition module collects the operation-related data of the inductive motor, obtains the body transport damage parameters and body comprehensive temperature parameters, and sends them to the transport data analysis module and load risk module respectively; After receiving the airframe transport damage parameters, the transport data analysis module immediately analyzes them, generates the equilibrium speed point JZ and the equilibrium consumption point JH, and sends them to the load risk module; After receiving the comprehensive temperature parameters of the body, the balanced speed point JZ and the balanced consumption point JH, the load risk module analyzes the comprehensive temperature parameters of the body to generate the balanced electrical cost point value DBJ and the balanced control cost point value KBJ, and combines the rectangular coordinate system to substitute the balanced electrical cost point value DBJ, the balanced control cost point value KBJ, the balanced speed point JZ and the balanced consumption point JH into the drawing points, generates relevant control signals, and sends them to the multi-mode control core.

7. The control system of a speed-adjustable inductive motor according to claim 6, characterized in that: The transport data analysis module analyzes the airframe transport and wear parameters to obtain the total cycle duration between the start of the sensor motor operation and the end of the last set of data collection, marking it as the transport cycle. The transport cycle is evenly divided according to the total number of collected data to obtain balanced sub-cycles. The data collected in each balanced sub-cycle is averaged to obtain the balanced cycle point J.

8. The control system of a speed-adjustable inductive motor according to claim 7, characterized in that: The machine body operation loss parameter includes a rotational speed value of the connection between the drive shaft (3) and the rotor inside the motor body (1), and a power consumption value only about the rotor operation circuit provided by the external power supply for the operation of the inductive motor. The rotational speed value and the power consumption value are both operated according to the balanced cycle point J generation method to obtain the balanced speed point JZ and the balanced consumption point JH.

9. The control system of a speed-adjustable inductive motor according to claim 8, characterized in that: The load risk module analyzes the comprehensive temperature parameters of the body, which include the electrical cost temperature value and the control cost temperature value. The electrical cost temperature value and the control cost temperature value are run according to the balanced cycle point J generation method to obtain the balanced electrical cost point value DBJ and the balanced control cost point value KBJ. Based on this, a rectangular coordinate system is established with the generation time of the balanced cycle point J as the X-axis and the data value as the Y-axis. The balanced speed point JZ, the balanced consumption point JH, the balanced electrical cost point value DBJ, and the balanced control cost point value KBJ are sequentially plotted on the rectangular coordinate system using a point-to-point connection method. Pre-stored stage range values are retrieved from the central control unit and sequentially plotted on the rectangular coordinate system using a point-to-point continuous method. Areas on the rectangular coordinate system where all four groups of plotted curves meet the stage range values according to the time process are marked as turning points. The corresponding control scheme sequence of the inductive motor is matched according to the stage range value of the generated turning point, and a control signal is generated according to the scheme sequence. The generated control signal is sent to the multi-mode control core, which controls the operation mode of the inductive motor according to the corresponding control signal.

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