A cooling system and cooling method for a brushless DC reduction motor

Abstract

The present invention relates to the technical field of motor cooling, and discloses a cooling system and method for a brushless DC reduction motor, the system comprising: a data acquisition module, which acquires the working parameters and real-time temperature of the motor; a working state determination module, which determines the working state of the motor according to the working parameters; an adjustment judgment module, which determines whether to adjust the cooling state of the motor according to the real-time temperature and the working time; a temperature adjustment determination module, which determines the temperature difference between the target temperature value and the real-time temperature of the motor according to the working state when adjusting, and determines the cooling water temperature adjustment amount; a cooling control module, which controls the cooling power of the refrigerator according to the cooling water temperature adjustment amount, so as to cool the cooling water and realize the cooling of the brushless DC reduction motor. The present invention realizes accurate dynamic adjustment of cooling by real-time monitoring of motor parameters and temperature, improves the stability of the working environment, prolongs the life of the motor, and reduces cost and energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of motor cooling, and in particular to a cooling system and a cooling method for a brushless DC reduction motor. Background Art

[0002] With the continuous development of science and technology, brushless DC reduction motors have been widely used in many fields, such as industrial automation equipment, robots, electric vehicles, etc. These application scenarios have put forward higher requirements on the performance and reliability of motors. However, during the long-term operation of brushless DC reduction motors, the heat generated when the current inside the motor passes through the winding, as well as mechanical friction and other factors, will cause the motor temperature to rise. Excessive temperature will not only affect the performance of the motor, such as reducing efficiency and torque output, but also shorten the service life of the motor, and may even cause safety hazards, such as motor burnout and insulation damage. Therefore, how to effectively cool the brushless DC reduction motor has become a technical problem that needs to be solved urgently.

[0003] At present, the cooling methods for brushless DC reduction motors mainly include air cooling and simple water cooling. Although the air cooling method has a simple structure and low cost, the heat dissipation effect is limited when the motor power is large, the working environment temperature is high, or the running time is long, and it is difficult to meet the heat dissipation needs of the motor. The traditional simple water cooling method often lacks precise control and adjustment mechanisms, and cannot adjust the cooling parameters in real time according to the actual working state and temperature changes of the motor, resulting in unstable cooling effect and failure to effectively control the motor temperature within the ideal range. In addition, although some complex cooling systems can achieve better cooling effects, they have problems such as complex structure, high cost, and difficult maintenance, which limits their wide application. Therefore, there is an urgent need for a cooling system and cooling method for brushless DC reduction motors to achieve cooling of brushless DC reduction motors. Summary of the invention

[0004] The object of the present invention is to provide a cooling system and a cooling method for a brushless DC reduction motor, aiming to solve the above-mentioned problem.

[0005] The present invention provides a cooling system for a brushless DC reduction motor, comprising:

[0006] A data acquisition module is configured to acquire operating parameters and real-time temperature of the brushless DC reduction motor, wherein the operating parameters include motor power, torque value and operating time;

[0007] A working state determination module is configured to determine the working state of the brushless DC reduction motor according to the working parameters;

[0008] An adjustment judgment module is configured to judge whether to adjust the cooling state of the brushless DC reduction motor according to the real-time temperature and the working time;

[0009] a temperature adjustment determination module, configured to determine a target temperature value of the brushless DC reduction motor according to the working state when the cooling state of the brushless DC reduction motor needs to be adjusted, determine a temperature difference between the target temperature value and the real-time temperature, and determine a cooling water temperature adjustment amount according to the temperature difference and the working time;

[0010] The cooling control module is configured to control the cooling power of the refrigerator according to the cooling water temperature adjustment amount, so as to cool the cooling water to realize the cooling of the DC brushless reduction motor.

[0011] Preferably, the working state determination module is configured to determine the working state of the brushless DC reduction motor according to the working parameters, including:

[0012] Determine the load of the brushless DC reduction motor according to the motor power and torque value;

[0013] Determine the working state of the brushless DC reduction motor according to the load of the brushless DC reduction motor;

[0014] Wherein, the load is determined according to the following formula:

[0015] L = (a × T + b × P) / 2;

[0016] Among them, L represents the load of the brushless DC reduction motor, T represents the torque value, a represents the torque conversion factor, P represents the motor power, and b represents the power conversion factor.

[0017] Preferably, the working state determination module determines the working state of the brushless DC reduction motor according to the load of the brushless DC reduction motor, including:

[0018] Presetting a first preset load and a second preset load, wherein the first preset load is smaller than the second preset load;

[0019] Setting the working state of the brushless DC reduction motor according to the relationship between the load of the brushless DC reduction motor and the first preset load and the second preset load;

[0020] If the load is less than or equal to the first preset load, the working state of the brushless DC reduction motor is set to a light load state;

[0021] If the load is greater than the first preset load, and the load is less than or equal to the second preset load, setting the working state of the brushless DC reduction motor to the rated load state;

[0022] If the load is greater than the second preset load, the working state of the brushless DC reduction motor is set to an overload state.

[0023] Preferably, the adjustment judgment module is configured to judge whether to adjust the cooling state of the brushless DC reduction motor according to the real-time temperature and the working time, including:

[0024] Comparing the real-time temperature with the preset temperature, if the real-time temperature is greater than the preset temperature, it is determined that the cooling state of the brushless DC reduction motor needs to be adjusted;

[0025] If the real-time temperature is less than or equal to the preset temperature, it is determined whether to adjust the cooling state of the brushless DC reduction motor according to the working time.

[0026] Preferably, the adjustment judgment module judges whether to adjust the cooling state of the brushless DC reduction motor according to the working time, including:

[0027] The working time is compared with the preset working time, and if the working time is greater than the preset working time, it is determined that the cooling state of the brushless DC reduction motor needs to be adjusted;

[0028] If the working time is less than or equal to the preset working time, it is determined that there is no need to adjust the cooling state of the brushless DC reduction motor.

[0029] Preferably, the temperature adjustment determination module determines the target temperature value of the brushless DC reduction motor according to the working state, including:

[0030] When the working state is a light load state, the target temperature value of the brushless DC reduction motor is set to a first target temperature value;

[0031] When the working state is the rated load state, the target temperature value of the brushless DC reduction motor is set to a second target temperature value;

[0032] When the working state is an overload state, the target temperature value of the brushless DC reduction motor is set to a third target temperature value;

[0033] Among them, the first target temperature value>the second target temperature value>the third target temperature value.

[0034] Preferably, the temperature adjustment determination module determines the cooling water temperature adjustment amount according to the temperature difference and the working time, including:

[0035] Presetting a first temperature difference and a second temperature difference, wherein the first temperature difference is smaller than the second temperature difference;

[0036] Setting an initial cooling water temperature adjustment amount according to a relationship between the temperature difference and the first temperature difference and the second temperature difference;

[0037] If the temperature difference is less than or equal to the first temperature difference, the initial cooling water temperature adjustment amount is set to the first preset temperature adjustment amount Q1;

[0038] If the temperature difference is greater than the first temperature difference, and the temperature difference is less than or equal to the second temperature difference, the initial cooling water temperature adjustment amount is set to the second preset temperature adjustment amount Q2;

[0039] If the temperature difference is greater than the second temperature difference, the initial cooling water temperature adjustment amount is set to the third preset temperature adjustment amount Q3; and Q1<Q2<Q3.

[0040] Preferably, the temperature adjustment determination module determines the cooling water temperature adjustment amount according to the temperature difference and the working time, and further includes:

[0041] After setting the initial cooling water temperature adjustment amount as the i-th preset temperature adjustment amount Qi according to the temperature difference, i=1, 2, 3, the initial cooling water temperature adjustment amount Qi is corrected according to the working time to obtain the cooling water temperature adjustment amount;

[0042] Preset a first working time and a second working time, wherein the first working time is shorter than the second working time;

[0043] Determine a correction coefficient according to the relationship between the working time and the first working time and the second working time, and correct the initial cooling water temperature adjustment amount based on the correction coefficient to obtain the cooling water temperature adjustment amount;

[0044] If the working time is less than the first working time, the initial cooling water temperature adjustment amount is corrected based on the first correction coefficient m1, and the cooling water temperature adjustment amount is obtained as Qi×m1;

[0045] If the working time is greater than or equal to the first working time, and the working time is less than the second working time, the initial cooling water temperature adjustment amount is corrected based on the second correction coefficient m2, and the cooling water temperature adjustment amount is obtained as Qi×m2;

[0046] If the working time is greater than or equal to the second working time, the initial cooling water temperature adjustment amount is corrected based on the third correction coefficient m3, and the cooling water temperature adjustment amount is obtained as Qi×m3; wherein m1<m2<m3.

[0047] Preferably, the cooling control module is configured to control the cooling power of the refrigerator according to the cooling water temperature adjustment amount, including:

[0048] Get the cooling water mass flow rate output by the refrigerator;

[0049] The refrigeration power of the refrigerator is determined according to the cooling water temperature adjustment amount and the cooling water mass flow rate. The refrigeration power is determined according to the following formula:

[0050]

[0051] Wherein, Pz represents the refrigeration power of the refrigerator, c represents the specific heat capacity of cooling water, m represents the mass flow rate of cooling water, ΔT represents the cooling water temperature adjustment amount, η represents the refrigeration efficiency of the refrigerator, and Δt represents the unit time.

[0052] The present invention also discloses a cooling method for a brushless DC reduction motor, which is applied to the cooling system for the brushless DC reduction motor, and comprises:

[0053] Obtaining operating parameters and real-time temperature of the brushless DC reduction motor, wherein the operating parameters include motor power, torque value and operating time;

[0054] Determine the working state of the brushless DC reduction motor according to the working parameters;

[0055] Determining whether to adjust the cooling state of the brushless DC reduction motor according to the real-time temperature and the working time;

[0056] If the cooling state of the brushless DC motor needs to be adjusted, the target temperature value of the brushless DC motor is determined according to the working state, and the temperature difference between the target temperature value and the real-time temperature is determined, and the cooling water temperature adjustment amount is determined according to the temperature difference and the working time;

[0057] The cooling power of the refrigerator is controlled according to the cooling water temperature adjustment amount to cool the cooling water and realize the cooling of the brushless DC reduction motor.

[0058] Compared with the prior art, the beneficial effect of the present invention is that the present invention can obtain the working parameters (including motor power, torque value and working time) and real-time temperature of the brushless DC reduction motor in real time through the data acquisition module, and can accurately grasp the working state and temperature change of the motor. This real-time monitoring and feedback mechanism provides reliable data support for subsequent cooling control, ensuring that the cooling system can respond to changes in motor temperature in a timely manner.

[0059] When the cooling state needs to be adjusted, the cooling system can more accurately control the cooling power of the cooling water, thereby achieving precise control of the motor temperature, stabilizing the motor temperature within the optimal working range, and improving the working efficiency and reliability of the motor.

[0060] The cooling system of the present invention does not adopt a fixed cooling mode, but dynamically adjusts the cooling strategy according to the actual working state and temperature requirements of the motor. For example, when the motor load is small and the temperature is low, the refrigeration power of the refrigerator can be appropriately reduced to reduce energy consumption; when the motor load is large and the temperature is high, the refrigeration power is increased to enhance the cooling effect. This targeted cooling strategy enables the cooling system to operate in an optimized manner under different working conditions and improves cooling efficiency.

[0061] By accurately calculating and controlling the cooling water temperature adjustment, overcooling or undercooling is avoided. Reasonable cooling water temperature adjustment can ensure more efficient heat exchange between cooling water and motor, quickly remove the heat generated by the motor, and thus improve the cooling efficiency of the entire cooling system.

[0062] Through the cooling system of the present invention, the temperature of the brushless DC reduction motor can be stabilized within an appropriate range, avoiding problems such as overheating, aging, deformation, etc. of the internal components of the motor due to excessively high temperature. A stable operating temperature helps to maintain the performance of the insulating material inside the motor and reduce the risk of insulation damage, thereby extending the service life of the motor. Drastic changes in temperature will generate thermal stress inside the motor, and long-term exposure to thermal stress will accelerate fatigue damage of the motor components. The cooling system of the present invention can effectively reduce the temperature fluctuations of the motor during operation through real-time monitoring and precise control, reduce the impact of thermal stress on the motor, further protect the internal structure and components of the motor, and extend the overall service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0064] Figure 1 The present invention is a functional block diagram of a cooling system for a brushless DC reduction motor.

[0065] Figure 2 The present invention is a schematic flow chart of a cooling method for a brushless DC reduction motor. DETAILED DESCRIPTION

[0066] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0067] like Figure 1 As shown, the present invention provides a cooling system for a brushless DC reduction motor, comprising:

[0068] A data acquisition module is configured to acquire operating parameters and real-time temperature of the brushless DC reduction motor, wherein the operating parameters include motor power, torque value and operating time;

[0069] A working state determination module is configured to determine the working state of the brushless DC reduction motor according to the working parameters;

[0070] An adjustment judgment module is configured to judge whether to adjust the cooling state of the brushless DC reduction motor according to the real-time temperature and the working time;

[0071] a temperature adjustment determination module, configured to determine a target temperature value of the brushless DC reduction motor according to the working state when the cooling state of the brushless DC reduction motor needs to be adjusted, determine a temperature difference between the target temperature value and the real-time temperature, and determine a cooling water temperature adjustment amount according to the temperature difference and the working time;

[0072] The cooling control module is configured to control the cooling power of the refrigerator according to the cooling water temperature adjustment amount, so as to cool the cooling water to realize the cooling of the DC brushless reduction motor.

[0073] This application can accurately grasp the working status and temperature of the motor by real-time monitoring of the working parameters and real-time temperature of the brushless DC reduction motor. The high-precision acquisition of the data acquisition module ensures the accuracy of the information and provides a reliable basis for subsequent judgment and adjustment. The working status determination module can intelligently analyze the working status of the motor to avoid insufficient cooling or excessive cooling problems caused by misjudgment. The introduction of the adjustment judgment module makes the adjustment of the cooling system more timely and reasonable, effectively extending the service life of the motor. The temperature adjustment determination module determines the reasonable cooling water temperature adjustment amount by accurately calculating the temperature difference and working time, and realizes fine control of the motor temperature. The cooling control module accurately controls the cooling power of the refrigerator according to the adjustment amount to ensure the optimization of the cooling effect.

[0074] In some embodiments of the present application, the working state determination module is configured to determine the working state of the brushless DC reduction motor according to the working parameters, including: determining the load of the brushless DC reduction motor according to the motor power and torque value; determining the working state of the brushless DC reduction motor according to the load of the brushless DC reduction motor;

[0075] Wherein, the load is determined according to the following formula:

[0076] L = (a × T + b × P) / 2;

[0077] Among them, L represents the load of the brushless DC reduction motor, T represents the torque value, a represents the torque conversion factor, P represents the motor power, and b represents the power conversion factor.

[0078] It can be understood that by introducing the load calculation formula, the accuracy of judging the working state of the brushless DC reduction motor is further improved. The formula comprehensively considers the torque value and power of the motor, and performs weighted processing through reasonable conversion factors to obtain the actual load condition of the motor. As an important basis for judging the working state of the motor, the accuracy of the load directly affects the adjustment strategy of the subsequent cooling state. Therefore, the load calculation method in this embodiment makes the adjustment of the cooling system more in line with the actual needs of the motor, avoiding the problem of poor cooling effect or waste of resources caused by inaccurate load judgment. In addition, the load calculation method is simple and clear, easy to implement, and provides strong support for the intelligent control of the cooling system.

[0079] In some embodiments of the present application, the working state determination module determines the working state of the brushless DC reduction motor according to the load of the brushless DC reduction motor, including: pre-setting a first preset load and a second preset load, the first preset load being less than the second preset load; setting the working state of the brushless DC reduction motor according to the relationship between the load of the brushless DC reduction motor and the first preset load and the second preset load; if the load is less than or equal to the first preset load, setting the working state of the brushless DC reduction motor to a light load state; if the load is greater than the first preset load, and the load is less than or equal to the second preset load, setting the working state of the brushless DC reduction motor to a rated load state; if the load is greater than the second preset load, setting the working state of the brushless DC reduction motor to an overload state.

[0080] It can be understood that by setting different preset load values, the present invention can clearly distinguish different working states of the brushless DC reduction motor. The division of light load state, rated load state and overload state enables the cooling system to adopt corresponding cooling strategies for different load conditions. In the light load state, the cooling system can appropriately reduce the cooling intensity and reduce energy consumption; in the rated load state, the cooling system maintains a normal cooling effect to ensure stable operation of the motor; in the overload state, the cooling system strengthens cooling to prevent the motor from overheating and damage. This method of dynamically adjusting the cooling strategy according to the load conditions not only improves the cooling efficiency, but also effectively extends the service life of the motor.

[0081] In some embodiments of the present application, the adjustment judgment module is configured to judge whether to adjust the cooling state of the DC brushless reduction motor according to the real-time temperature and the working time, including: comparing the real-time temperature with the preset temperature, if the real-time temperature is greater than the preset temperature, judging that the cooling state of the DC brushless reduction motor needs to be adjusted; if the real-time temperature is less than or equal to the preset temperature, judging whether to adjust the cooling state of the DC brushless reduction motor according to the working time.

[0082] It is understandable that by introducing real-time temperature and working time as the basis for judgment, the cooling state adjustment strategy is refined. When the real-time temperature exceeds the preset value, the system immediately determines that the cooling state needs to be adjusted to ensure that the motor is not damaged by overheating. When the real-time temperature is within a safe range, the system comprehensively considers the working time to avoid increased energy consumption and equipment wear caused by frequent adjustments to the cooling state. This comprehensive judgment mechanism makes the adjustment of the cooling system more accurate and reasonable, which not only ensures the safe operation of the motor, but also improves the overall energy efficiency of the system.

[0083] In some embodiments of the present application, the adjustment judgment module determines whether to adjust the cooling state of the DC brushless reduction motor according to the working time, including: comparing the working time with the preset working time, if the working time is greater than the preset working time, it is determined that the cooling state of the DC brushless reduction motor needs to be adjusted; if the working time is less than or equal to the preset working time, it is determined that the cooling state of the DC brushless reduction motor does not need to be adjusted.

[0084] It is understandable that by combining the working time as another judgment dimension, the accuracy and reliability of the cooling state adjustment are enhanced. After the motor has been working for a long time, even if the real-time temperature has not reached a dangerous level, the system can predictably judge that the cooling state may need to be adjusted to prevent potential overheating risks caused by long-term operation. This preventive adjustment strategy helps to extend the service life of the motor and reduce the failure rate caused by overheating. At the same time, when the working time is short and the motor is still in a relatively cool state, the system can avoid unnecessary cooling adjustments, thereby saving energy and reducing unnecessary wear of the equipment. This comprehensive judgment method based on real-time temperature and working time not only improves the intelligence of the cooling system, but also enables the entire system to achieve higher energy efficiency and longer service life while ensuring the safe operation of the motor.

[0085] In some embodiments of the present application, the temperature adjustment determination module determines the target temperature value of the DC brushless reduction motor according to the working state, including: when the working state is a light load state, the target temperature value of the DC brushless reduction motor is set to a first target temperature value; when the working state is a rated load state, the target temperature value of the DC brushless reduction motor is set to a second target temperature value; when the working state is an overload state, the target temperature value of the DC brushless reduction motor is set to a third target temperature value; wherein the first target temperature value > the second target temperature value > the third target temperature value.

[0086] It can be understood that by dynamically adjusting the target temperature value according to the working state of the motor, the flexibility and adaptability of the cooling system are improved. Under light load, the heat generated by the motor is relatively small, so setting the target temperature value relatively high can reduce the energy consumption of the cooling system while ensuring safety. Under rated load or overload conditions, the heat generated by the motor increases. At this time, setting the target temperature value relatively low can more effectively control the temperature of the motor and prevent overheating. This strategy of flexibly adjusting the target temperature value according to the working state not only helps to improve the operating efficiency of the motor, but also optimizes energy consumption while ensuring safety.

[0087] In some embodiments of the present application, the temperature adjustment determination module determines the cooling water temperature adjustment amount according to the temperature difference and the working time, including: pre-setting a first temperature difference and a second temperature difference, the first temperature difference is less than the second temperature difference; setting an initial cooling water temperature adjustment amount according to the relationship between the temperature difference and the first temperature difference and the second temperature difference; if the temperature difference is less than or equal to the first temperature difference, setting the initial cooling water temperature adjustment amount to the first preset temperature adjustment amount Q1; if the temperature difference is greater than the first temperature difference, and the temperature difference is less than or equal to the second temperature difference, setting the initial cooling water temperature adjustment amount to the second preset temperature adjustment amount Q2; if the temperature difference is greater than the second temperature difference, setting the initial cooling water temperature adjustment amount to the third preset temperature adjustment amount Q3; and Q1<Q2<Q3.

[0088] It is understandable that by introducing the temperature difference and working time as the determining factors of the cooling water temperature adjustment, the intelligence level of the cooling system is improved. In practical applications, the temperature difference directly reflects the gap between the current motor temperature and the target temperature, and is an important basis for adjusting the cooling water temperature. The consideration of working time makes the adjustment of the cooling system more delicate and can better adapt to the continuous operation of the motor. By pre-setting different temperature difference intervals and corresponding initial cooling water temperature adjustments, the present invention realizes precise control of the cooling water temperature. When the temperature difference is small, a smaller temperature adjustment is used, which can not only meet the cooling needs, but also avoid the energy waste caused by excessive cooling. When the temperature difference is large, a larger temperature adjustment is used to quickly reduce the motor temperature and prevent overheating.

[0089] In some embodiments of the present application, the temperature adjustment determination module determines the cooling water temperature adjustment amount according to the temperature difference and the working time, and also includes: after setting the initial cooling water temperature adjustment amount to the i-th preset temperature adjustment amount Qi according to the temperature difference, i=1, 2, 3, and correcting the initial cooling water temperature adjustment amount Qi according to the working time to obtain the cooling water temperature adjustment amount; presetting the first working time and the second working time, the first working time is less than the second working time; determining a correction coefficient according to the relationship between the working time and the first working time and the second working time, and correcting the initial cooling water temperature adjustment amount based on the correction coefficient to obtain the cooling water temperature Adjustment amount; if the working time is less than the first working time, the initial cooling water temperature adjustment amount is corrected based on the first correction coefficient m1, and the cooling water temperature adjustment amount is Qi×m1; if the working time is greater than or equal to the first working time, and the working time is less than the second working time, the initial cooling water temperature adjustment amount is corrected based on the second correction coefficient m2, and the cooling water temperature adjustment amount is Qi×m2; if the working time is greater than or equal to the second working time, the initial cooling water temperature adjustment amount is corrected based on the third correction coefficient m3, and the cooling water temperature adjustment amount is Qi×m3; wherein, m1<m2<m3.

[0090] It can be understood that by introducing the working time as a correction factor for the initial cooling water temperature adjustment, the accuracy and flexibility of the cooling system adjustment are enhanced. In practical applications, the working time reflects the operating status and load conditions of the motor, and is an important reference for adjusting the cooling strategy. By presetting different working time intervals and corresponding correction coefficients, the present invention realizes the dynamic correction of the cooling water temperature adjustment. When the working time is short, a smaller correction coefficient is used to maintain the stability of the cooling system and avoid frequent adjustments causing interference to the motor operation. When the working time is long, a larger correction coefficient is used to enhance the cooling effect and ensure that the motor can still be effectively cooled under high load conditions. In addition, by combining the temperature difference with the working time for correction, the present invention can more comprehensively consider the actual operating status of the motor and realize the refined adjustment of the cooling strategy.

[0091] In some embodiments of the present application, the cooling control module is configured to control the cooling power of the refrigerator according to the cooling water temperature adjustment amount, including: obtaining the cooling water mass flow rate output by the refrigerator; determining the cooling power of the refrigerator according to the cooling water temperature adjustment amount and the cooling water mass flow rate.

[0092] The cooling power is determined according to the following formula:

[0093]

[0094] Wherein, Pz represents the refrigeration power of the refrigerator, c represents the specific heat capacity of cooling water, m represents the mass flow rate of cooling water, ΔT represents the cooling water temperature adjustment amount, η represents the refrigeration efficiency of the refrigerator, and Δt represents the unit time.

[0095] In this embodiment, the calculation of the cooling power is based on a specific formula that describes in detail the relationship between the cooling power and multiple parameters. In this formula, Pz represents the cooling power of the refrigerator, which is a key output parameter used to indicate how much heat the refrigerator can remove per unit time. The parameter c represents the specific heat capacity of the cooling water, which is a physical constant that represents the amount of heat required to raise the temperature of a unit mass of cooling water by one degree. The parameter m represents the mass flow rate of the cooling water, that is, the mass of cooling water flowing through the refrigerator per unit time. The parameter ∆T represents the adjustment amount of the cooling water temperature, which reflects the temperature difference between the cooling water when entering and leaving the refrigerator. η represents the cooling efficiency of the refrigerator, which is an indicator of the performance of the refrigerator, indicating the ratio between the actual cooling power of the refrigerator and the theoretical cooling power. Finally, the parameter ∆t represents the unit time, usually in seconds or hours, which is used to standardize the calculation of the cooling power and indicates the time taken to complete this temperature adjustment.

[0096] It is understandable that by accurately controlling the refrigeration power of the refrigerator, the cooling water temperature is accurately adjusted. In practical applications, the mass flow rate and temperature adjustment of the cooling water are key factors affecting the refrigeration power. By introducing physical parameters such as specific heat capacity and refrigeration efficiency, and combining the cooling demand per unit time, the present invention establishes a mathematical model between the refrigeration power and the cooling water temperature adjustment. This model not only improves the response speed of the cooling system, but also ensures the consistency and stability of the cooling effect.

[0097] like Figure 2 As shown, the present invention also discloses a cooling method for a brushless DC reduction motor, which is applied to the cooling system for the brushless DC reduction motor, comprising:

[0098] The operating parameters and real-time temperature of the brushless DC reduction motor are obtained, wherein the operating parameters include motor power, torque value and operating time.

[0099] The working state of the brushless DC reduction motor is determined according to the working parameters.

[0100] Whether to adjust the cooling state of the brushless DC reduction motor is determined according to the real-time temperature and the working time.

[0101] If the cooling state of the brushless DC reduction motor needs to be adjusted, the target temperature value of the brushless DC reduction motor is determined according to the working state, and the temperature difference between the target temperature value and the real-time temperature is determined, and the cooling water temperature adjustment amount is determined according to the temperature difference and the working time.

[0102] The cooling power of the refrigerator is controlled according to the cooling water temperature adjustment amount to cool the cooling water and realize the cooling of the brushless DC reduction motor.

[0103] By comprehensively considering the working parameters and real-time temperature of the brushless DC reduction motor, the present invention can intelligently determine when and how to adjust the cooling state. This method not only improves the flexibility of the cooling system, but also ensures that the motor can be properly cooled under different working conditions. In practical applications, parameters such as motor power, torque value and working time can reflect the working intensity and heat load of the motor, while real-time temperature monitoring provides direct feedback on the current cooling effect. By accurately calculating the difference between the target temperature and the real-time temperature, and combining the working time, the present invention can accurately determine the required cooling water temperature adjustment. The determination of this adjustment further provides a basis for the control of the cooling power, thereby realizing the refined management of the cooling process. In addition, the present method also fully considers the actual operating conditions of the motor, avoids unnecessary cooling energy consumption, and further improves the energy efficiency of the system.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

[0105] The system provided in the above embodiment is only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the modules or steps in the embodiments of the present invention can be decomposed or combined. For example, the modules in the above embodiment can be combined into one module, or further divided into multiple sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the modules or steps, and are not regarded as improper limitations of the present invention.

[0106] Those skilled in the art should be able to appreciate that the modules and method steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, computer software or a combination of the two, and the programs corresponding to the software modules and method steps can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs or any other form of storage medium known in the technical field. In order to clearly illustrate the interchangeability of electronic hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are performed in electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

Claims

1. A cooling system for a brushless DC motor, characterized in that: include: A data acquisition module is configured to acquire operating parameters and real-time temperature of the brushless DC reduction motor, wherein the operating parameters include motor power, torque value and operating time; A working state determination module is configured to determine the working state of the brushless DC reduction motor according to the working parameters; An adjustment judgment module is configured to judge whether to adjust the cooling state of the brushless DC reduction motor according to the real-time temperature and the working time; a temperature adjustment determination module, configured to determine a target temperature value of the brushless DC reduction motor according to the working state when the cooling state of the brushless DC reduction motor needs to be adjusted, determine a temperature difference between the target temperature value and the real-time temperature, and determine a cooling water temperature adjustment amount according to the temperature difference and the working time; A cooling control module is configured to control the cooling power of the refrigerator according to the cooling water temperature adjustment amount, so as to cool the cooling water to realize cooling of the brushless DC reduction motor; The working state determination module is configured to determine the working state of the brushless DC reduction motor according to the working parameters, including: Determine the load of the brushless DC reduction motor according to the motor power and torque value; Determine the working state of the brushless DC reduction motor according to the load of the brushless DC reduction motor; Wherein, the load is determined according to the following formula: L = (a × T + b × P) / 2; Wherein, L represents the load of the brushless DC motor, T represents the torque value, a represents the torque conversion factor, P represents the motor power, and b represents the power conversion factor; The working state determination module determines the working state of the brushless DC reduction motor according to the load of the brushless DC reduction motor, including: Presetting a first preset load and a second preset load, wherein the first preset load is smaller than the second preset load; Setting the working state of the brushless DC reduction motor according to the relationship between the load of the brushless DC reduction motor and the first preset load and the second preset load; If the load is less than or equal to the first preset load, the working state of the brushless DC reduction motor is set to a light load state; If the load is greater than the first preset load, and the load is less than or equal to the second preset load, setting the working state of the brushless DC reduction motor to the rated load state; If the load is greater than the second preset load, the working state of the brushless DC reduction motor is set to an overload state.

2. The cooling system for a brushless DC motor according to claim 1, characterized in that: The adjustment judgment module is configured to judge whether to adjust the cooling state of the brushless DC reduction motor according to the real-time temperature and the working time, including: Comparing the real-time temperature with the preset temperature, if the real-time temperature is greater than the preset temperature, it is determined that the cooling state of the brushless DC reduction motor needs to be adjusted; If the real-time temperature is less than or equal to the preset temperature, it is determined whether to adjust the cooling state of the brushless DC reduction motor according to the working time.

3. The cooling system for a brushless DC motor according to claim 2, characterized in that: The adjustment judgment module judges whether to adjust the cooling state of the brushless DC reduction motor according to the working time, including: The working time is compared with the preset working time, and if the working time is greater than the preset working time, it is determined that the cooling state of the brushless DC reduction motor needs to be adjusted; If the working time is less than or equal to the preset working time, it is determined that there is no need to adjust the cooling state of the brushless DC reduction motor.

4. The cooling system for a brushless DC motor according to claim 1, characterized in that: The temperature adjustment determination module determines the target temperature value of the brushless DC reduction motor according to the working state, including: When the working state is a light load state, the target temperature value of the brushless DC reduction motor is set to a first target temperature value; When the working state is the rated load state, the target temperature value of the brushless DC reduction motor is set to a second target temperature value; When the working state is an overload state, the target temperature value of the brushless DC reduction motor is set to a third target temperature value; Among them, the first target temperature value>the second target temperature value>the third target temperature value.

5. The cooling system for a brushless DC motor according to claim 1, characterized in that: The temperature adjustment determination module determines the cooling water temperature adjustment amount according to the temperature difference and the working time, including: Presetting a first temperature difference and a second temperature difference, wherein the first temperature difference is smaller than the second temperature difference; Setting an initial cooling water temperature adjustment amount according to a relationship between the temperature difference and the first temperature difference and the second temperature difference; If the temperature difference is less than or equal to the first temperature difference, the initial cooling water temperature adjustment amount is set to the first preset temperature adjustment amount Q1; If the temperature difference is greater than the first temperature difference, and the temperature difference is less than or equal to the second temperature difference, the initial cooling water temperature adjustment amount is set to the second preset temperature adjustment amount Q2; If the temperature difference is greater than the second temperature difference, the initial cooling water temperature adjustment amount is set to the third preset temperature adjustment amount Q3; and Q1<Q2<Q3.

6. The cooling system for a brushless DC motor according to claim 5, characterized in that: The temperature adjustment determination module determines the cooling water temperature adjustment amount according to the temperature difference and the working time, and also includes: After setting the initial cooling water temperature adjustment amount as the i-th preset temperature adjustment amount Qi according to the temperature difference, i=1, 2, 3, the initial cooling water temperature adjustment amount Qi is corrected according to the working time to obtain the cooling water temperature adjustment amount; Preset a first working time and a second working time, wherein the first working time is shorter than the second working time; Determine a correction coefficient according to the relationship between the working time and the first working time and the second working time, and correct the initial cooling water temperature adjustment amount based on the correction coefficient to obtain the cooling water temperature adjustment amount; If the working time is less than the first working time, the initial cooling water temperature adjustment amount is corrected based on the first correction coefficient m1, and the cooling water temperature adjustment amount is obtained as Qi×m1; If the working time is greater than or equal to the first working time, and the working time is less than the second working time, the initial cooling water temperature adjustment amount is corrected based on the second correction coefficient m2, and the cooling water temperature adjustment amount is obtained as Qi×m2; If the working time is greater than or equal to the second working time, the initial cooling water temperature adjustment amount is corrected based on the third correction coefficient m3, and the cooling water temperature adjustment amount is obtained as Qi×m3; wherein m1<m2<m3.

7. The cooling system for a brushless DC motor according to claim 1, characterized in that: The cooling control module is configured to control the cooling power of the refrigerator according to the cooling water temperature adjustment amount, including: Get the cooling water mass flow rate output by the refrigerator; The refrigeration power of the refrigerator is determined according to the cooling water temperature adjustment amount and the cooling water mass flow rate. The refrigeration power is determined according to the following formula: ； Wherein, Pz represents the refrigeration power of the refrigerator, c represents the specific heat capacity of cooling water, m represents the mass flow rate of cooling water, ΔT represents the cooling water temperature adjustment amount, η represents the refrigeration efficiency of the refrigerator, and Δt represents the unit time.

8. A cooling method for a brushless DC reduction motor, applied to a cooling system for a brushless DC reduction motor as claimed in any one of claims 1 to 7, characterized in that: include: Obtaining operating parameters and real-time temperature of the brushless DC reduction motor, wherein the operating parameters include motor power, torque value and operating time; Determine the working state of the brushless DC reduction motor according to the working parameters; Determining whether to adjust the cooling state of the brushless DC reduction motor according to the real-time temperature and the working time; If the cooling state of the brushless DC motor needs to be adjusted, the target temperature value of the brushless DC motor is determined according to the working state, and the temperature difference between the target temperature value and the real-time temperature is determined, and the cooling water temperature adjustment amount is determined according to the temperature difference and the working time; The cooling power of the refrigerator is controlled according to the cooling water temperature adjustment amount to cool the cooling water and realize the cooling of the brushless DC reduction motor.

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