A power control method and system for engineering machinery

Abstract

The application provides a power control method and system of an engineering machine. The method comprises: determining the required output power of a hydraulic pump according to the current running state of the engineering machine; determining the required output power of a motor according to the required output power of the hydraulic pump; obtaining the standard output torque and the standard rotating speed of the motor corresponding to the current running state, and obtaining the corresponding adjustment coefficient; adjusting the output torque and the rotating speed of the motor according to the standard output torque, the standard rotating speed and the adjustment coefficient, so that the actual output power of the motor in the engineering machine meets the required output power of the motor. The power control method of the engineering machine provided by the application can effectively utilize the better speed regulation characteristics and strong overload capacity of the motor, improve the efficiency and accuracy of the power regulation of the engineering machine, and thus improve the stability of the operation of the engineering machine.

Description

Technical Field

[0001] The present invention relates to the field of intelligent control technology, and more particularly to a power control method and system for engineering machinery, an electronic device, and a processor-readable storage medium. Background Art

[0002] In the construction industry, various types of construction machinery are increasingly being used. Traditional power matching methods for construction machinery determine the speed and maximum torque at the hydraulic pump input for different gears within the torque range specified by the engine's characteristics. During operation, the engine, such as an excavator, is constrained by the hysteresis of the intake system, preventing a significant instantaneous torque increase. This results in a failure to increase torque when the construction machinery encounters heavy loads, causing a significant drop in engine speed and resulting in jerks and delays in movement. Conversely, when a heavy load is suddenly unloaded, the engine's torque fails to decrease synchronously, resulting in a significant increase in engine speed, causing sudden jumps in the movement. To address these issues, existing techniques typically incorporate multiple relief valves and proportional valves within the hydraulic system. By rationally regulating the hydraulic system's pressure and flow, these valves ensure smooth movement, minimizing the impact of sudden load changes on the power system and maintaining a stable engine speed. Currently, with the rapid advancement of technology, an increasing number of construction machinery are equipped with electric motors. Electric motors offer a wide speed regulation range, strong overload capacity, and fast response. The efficiency of the electric motors used in most electric construction machinery is higher than that of engines used in construction machinery of the same tonnage. This is primarily due to their wider adjustable speed range. Within this adjustable speed range, their efficiency is higher than that of the engine, their torque output is higher than that of the engine, and their speed and torque response speed are higher than that of the engine within this range. However, when matching the power of electric construction machinery, the traditional power matching method used for engine construction machinery is still inefficient and lacks stability. To leverage the superior speed regulation characteristics of electric motors, these traditional power matching methods for engine construction machinery need to be optimized and improved. Therefore, providing a more effective power control solution for construction machinery to improve control stability and efficiency has become a pressing technical issue. Summary of the Invention

[0003] To this end, the present invention provides a power control method and system for engineering machinery to solve the problem in the prior art that the power control scheme for engineering machinery has low control efficiency, resulting in poor operational stability of the engineering machinery.

[0004] The present invention provides a power control method for engineering machinery, comprising:

[0005] Determine the required output power of the hydraulic pump according to the current operating status of the construction machinery;

[0006] determining the required output power of the motor according to the required output power of the hydraulic pump;

[0007] obtaining the standard output torque and the standard rotating speed of the motor corresponding to the current operating state, and obtaining the corresponding adjustment coefficient; and adjusting the output torque and the rotating speed of the motor according to the standard output torque, the standard rotating speed and the adjustment coefficient, so that the actual output power of the motor in the engineering machinery meets the required output power of the motor.

[0008] Further, after adjusting the output torque and the rotating speed of the motor, the method further comprises:

[0009] comparing the actual output power of the motor with the required output power of the motor to determine whether the corresponding power requirement is met at present, and if so, obtaining the overall working efficiency of the engineering machinery to determine whether the overall efficiency of the engineering machinery meets the preset efficiency requirement; the overall working efficiency comprises the hydraulic pump efficiency and the motor efficiency.

[0010] Further, the required output power of the motor is determined according to the required output power of the hydraulic pump, and specifically comprises:

[0011] determining the hydraulic pump efficiency, the transmission efficiency between the motor and the hydraulic pump;

[0012] determining the required output power of the motor according to the required output power of the hydraulic pump, the hydraulic pump efficiency and the transmission efficiency between the motor and the hydraulic pump;

[0013] The hydraulic pump efficiency is obtained based on the standard input power of the hydraulic pump and the standard output power of the hydraulic pump.

[0014] Further, the corresponding adjustment coefficient is obtained, and specifically comprises:

[0015] obtaining the adjustment coefficient corresponding to the engineering machinery according to the type of the engineering machinery, the required output power of the hydraulic pump of the engineering machinery in the current operating state, the power attribute of the hydraulic pump, the power attribute of the motor and the preset corresponding relationship; wherein, the hydraulic pump and the motor are loaded in the engineering machinery.

[0016] Further, the adjustment coefficient corresponding to the engineering machinery is obtained according to the type of the engineering machinery, the required output power of the hydraulic pump of the engineering machinery in the current operating state, the power attribute of the hydraulic pump, the power attribute of the motor and the preset corresponding relationship, and specifically comprises:

[0017] The type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in the current operating state, the power attribute of the hydraulic pump, and the power attribute of the electric motor are used as indexes and matched with a preset corresponding relationship to obtain a matching result; and the adjustment coefficient corresponding to the engineering machinery is determined according to the matching result;

[0018] The corresponding relationship is the relationship between the type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in the current operating state, the power attribute of the hydraulic pump, the power attribute of the motor, and the adjustment coefficient.

[0019] Furthermore, after determining the required output power of the motor, the following is also included:

[0020] Obtaining corresponding motor efficiency based on the standard input power and the standard output power of the motor;

[0021] The actual input power required by the motor is obtained by combining the motor efficiency and the output power required by the motor.

[0022] Furthermore, the required output power of the hydraulic pump is determined according to the current operating state of the construction machinery, specifically including:

[0023] detecting a current actual gear position of the engineering machinery;

[0024] The required output power of the hydraulic pump is determined according to the current actual gear position.

[0025] The present invention also provides a power control system for engineering machinery, comprising:

[0026] A hydraulic pump required output power determination unit, configured to determine the required output power of the hydraulic pump according to the current operating state of the engineering machinery;

[0027] a motor required output power determination unit, configured to determine the required output power of the motor according to the required output power of the hydraulic pump;

[0028] A power control unit is used to obtain the standard output torque and standard speed corresponding to the motor in the current operating state, and obtain the corresponding adjustment coefficient; according to the standard output torque, the standard speed and the adjustment coefficient, the output torque and speed of the motor are adjusted so that the actual output power of the motor in the engineering machinery meets the output power required by the motor.

[0029] Furthermore, after adjusting the output torque and speed of the motor, the method further includes:

[0030] A judgment unit is used to compare the actual output power of the motor with the output power required by the motor to determine whether the corresponding power requirement is currently met. If so, the overall working efficiency of the engineering machinery is obtained to determine whether the overall efficiency of the engineering machinery meets the preset efficiency requirement; the overall working efficiency includes the hydraulic pump efficiency and the motor efficiency.

[0031] Furthermore, the generator required output power determination unit is specifically used to:

[0032] The output power required by the motor is determined based on the output power required by the hydraulic pump, the hydraulic pump efficiency, and the transmission efficiency between the motor and the hydraulic pump; wherein the hydraulic pump efficiency is obtained based on the standard input power and the standard output power of the hydraulic pump.

[0033] Furthermore, the power control unit is specifically used to:

[0034] Determine the hydraulic pump efficiency and the transmission efficiency between the electric motor and the hydraulic pump;

[0035] determining the output power required by the motor according to the output power required by the hydraulic pump, the efficiency of the hydraulic pump, and the transmission efficiency between the motor and the hydraulic pump;

[0036] The hydraulic pump efficiency is obtained based on the standard input power and the standard output power of the hydraulic pump.

[0037] Furthermore, according to the type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in the current operating state, the power attributes of the hydraulic pump, the power attributes of the electric motor, and a preset correspondence, the adjustment coefficient corresponding to the engineering machinery is obtained, specifically including:

[0038] The type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in the current operating state, the power attribute of the hydraulic pump, and the power attribute of the electric motor are used as indexes and matched with a preset corresponding relationship to obtain a matching result; and the adjustment coefficient corresponding to the engineering machinery is determined according to the matching result;

[0039] The corresponding relationship is the relationship between the type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in the current operating state, the power attribute of the hydraulic pump, the power attribute of the motor, and the adjustment coefficient.

[0040] Furthermore, after determining the required output power of the motor, the following is also included:

[0041] a motor efficiency obtaining unit, configured to obtain the corresponding motor efficiency based on the standard input power and the standard output power of the motor;

[0042] The actual input power acquisition unit required by the motor is used for obtaining the actual input power required by the motor based on the motor efficiency and the output power required by the motor.

[0043] Furthermore, the hydraulic pump required output power determination unit is specifically used to: detect the current actual gear position of the engineering machinery; and determine the required output power of the hydraulic pump according to the current actual gear position.

[0044] The present invention also provides an electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of any of the above-described methods for controlling the power of engineering machinery are implemented.

[0045] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of any of the above-mentioned methods for controlling the power of engineering machinery are implemented.

[0046] The power control method for engineering machinery provided by the present invention determines the output power required by the hydraulic pump based on the current operating state of the engineering machinery, and determines the output power required by the motor based on the output power required by the hydraulic pump. The method then obtains the standard output torque and standard speed corresponding to the motor in the current operating state, and obtains the corresponding adjustment coefficient. Finally, the output torque and speed of the motor are adjusted based on the standard output torque, the standard speed, and the adjustment coefficient to improve the efficiency of the hydraulic pump, thereby ensuring that the actual output power of the motor in the engineering machinery meets the output power required by the motor. This method can effectively utilize the motor's excellent speed regulation characteristics and strong overload capacity to improve the efficiency and accuracy of the power control of the engineering machinery, thereby enhancing the stability of the engineering machinery's operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0048] Figure 1 This is one of the flow charts of the power control method for engineering machinery provided by the present invention;

[0049] Figure 2 This is the second flow chart of the power control method for engineering machinery provided by the present invention;

[0050] Figure 3 This is the third flow chart of the power control method for engineering machinery provided by the present invention;

[0051] Figure 4 It is a MAP diagram of the motor efficiency provided by the present invention;

[0052] Figure 5 It is a MAP diagram of the diesel engine efficiency provided by the present invention;

[0053] Figure 6 It is a MAP diagram of the hydraulic pump efficiency provided by the present invention;

[0054] Figure 7 It is a structural diagram of the power control system of the engineering machinery provided by the present invention;

[0055] Figure 8 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0056] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0057] The following describes in detail the embodiment of the power control method for engineering machinery according to the present invention. Figure 1 As shown, it is one of the flow charts of the power control method for engineering machinery provided by an embodiment of the present invention. The specific implementation process includes the following steps:

[0058] Step 101: Determine the required output power of the hydraulic pump according to the current operating state of the construction machinery.

[0059] The engineering machinery may refer to an excavator, earthmoving machinery, compacting machinery, or other engineering machinery equipped with a hydraulic pump and an electric motor. The current operating state may refer to the operating state of the engineering machinery in a specific operating gear and operating condition.

[0060] During the specific implementation of this step, a power matching method can be used to determine the required output power, i.e., the required output power of the hydraulic pump (i.e., the power required from the hydraulic pump in the current operating state), based on the current operating gear of the engineering machine. For example, the current actual gear of the engineering machine is first detected, and then the required output power of the hydraulic pump is determined based on the corresponding relationship between the current actual gear and the preset operating gear and the output power. After determining the output power in this step, the motor torque and speed can be adjusted in subsequent steps to improve efficiency and energy utilization, thereby achieving energy conservation.

[0061] Step 102: Determine the output power required by the motor according to the output power required by the hydraulic pump.

[0062] In this step, the required output power of the motor can be determined based on the required output power of the hydraulic pump, the efficiency of the hydraulic pump, and the transmission efficiency between the motor and the hydraulic pump. The hydraulic pump efficiency is derived based on the standard input power and standard output power of the hydraulic pump. Furthermore, after determining the required output power of the motor, the method further includes obtaining a corresponding motor efficiency based on the standard input power and standard output power of the motor. Based on the motor efficiency and the required output power of the motor, the actual required input power of the motor is obtained.

[0063] Specifically, the motor input power is P0 = U * I, and the motor output power is P1 = T * n / 9550, where 9550 is a constant. The motor and the hydraulic pump rely on the coupling to transmit power, and the transmission efficiency η0 varies depending on the device and structure. Therefore, the hydraulic pump input power P2 = η0 * P1, and the hydraulic pump output power P3 = F * V * n / 20π / 9550. Where U is voltage, I is current, T is torque, n is speed, F is main pressure, and V is displacement. Figure 2 As shown, it is a schematic diagram of the power transmission part of the engineering machinery equipped with an electric motor. The pump described in the figure is a hydraulic pump, the motor described is an electric motor, and the working device can be, for example, the bucket of an excavator.

[0064] Motor efficiency η1=P1 / P0, which is determined by the output torque T AThe motor efficiency MAP is determined by the line pressure (F) and the speed (n), i.e., η1 ~ (T,n). This can be determined using the motor efficiency map. The hydraulic pump efficiency η2 = P3 / P2, which is determined by the line pressure (F) and the displacement (V), i.e., η2 ~ (F,V). This can be determined using the hydraulic pump efficiency map. The motor map is a data curve generated during motor testing that primarily displays the distribution of motor efficiency at different speeds and torques, also known as the efficiency distribution diagram. Points with the same efficiency can be connected to form a loop and directly projected onto a plane to form a horizontal curve. Loops with different efficiencies will not coincide.

[0065] According to the power currently required by the construction machinery (i.e. the output power required by the hydraulic pump) P α , suppose P3=P α , then the output power required by the motor and the power required by the motor P can be determined β =P α / (η1*η2*η0), that is, by increasing η1 and η2, the efficiency of the entire power transmission system of the construction machinery can be improved, power loss can be reduced, and energy saving can be achieved. Figure 4 Judging from the moving distance in the direction of the arrow between the two points and the contour lines of motor efficiency, the motor efficiency is above 94% in the range of 1000-2400rpm and 200-800Nm, that is, in the range of about 20kW to 200kW, and the highest working power of general engineering machinery is about 94kW, so the high-efficiency zone of the motor completely exceeds the commonly used power range, that is, the large high-efficiency range of the motor itself, so the change in the motor efficiency η1 can be ignored. Therefore, when the output power required by the hydraulic pump remains unchanged, it can be considered to reduce the power required by the motor by increasing the hydraulic pump efficiency η2, thereby achieving the purpose of saving energy. Specifically, according to the above content, it can be seen that the efficiency of the hydraulic pump is determined by the main pressure F and the displacement V, and F is determined by the load, that is, it remains unchanged, and the torque T of the pump B =F*V / 20π, that is, the pump torque T B It is positively correlated with the displacement V. To increase the displacement V, you only need to increase the pump torque T. B The pump torque T B And the output torque T of the motor A Therefore, the output torque T of the motor can be adjusted A The output torque of the motor is T A *Transmission efficiency η0 = pump torque T BThe motor's output power P = T1*n1 / 9550 = T2*n2 / 9550, where T1 and n1 are the values ​​before adjustment, and T2*n2 is the value after adjustment. To maintain or reduce the motor's output power, the motor's speed n must be adjusted accordingly. For example, increasing the motor's output torque requires decreasing the motor's speed n; decreasing the motor's output torque requires increasing the motor's speed n.

[0066] During the implementation of the present invention, the output torque and speed of the motor can be adjusted by matching the corresponding adjustment coefficients. Specifically, first, the corresponding adjustment coefficients are matched according to the attribute information of the motor and pump loaded on the engineering machinery. For example, the adjustment coefficient corresponding to the output torque of the motor can be 1.2, and the adjustment coefficient corresponding to the speed of the motor can be 8.5; or the adjustment coefficient corresponding to the output torque of the motor can be 0.9, and the adjustment coefficient corresponding to the speed of the motor can be 1.2. No specific limitation is made here. The output torque T of the motor can be adjusted by the adjustment coefficient. A and speed n, thereby increasing η2.

[0067] Step 103: Obtain the standard output torque and standard speed corresponding to the motor in the current operating state, and obtain the corresponding adjustment coefficient; adjust the output torque and speed of the motor according to the standard output torque, the standard speed and the adjustment coefficient so that the actual output power of the motor in the engineering machinery meets the output power required by the motor.

[0068] Specifically, the standard output torque and standard speed corresponding to the motor in the current operating state are first obtained, as well as the corresponding adjustment coefficient. Based on the standard output torque, standard speed, and adjustment coefficient, the output torque and speed of the motor are adjusted to improve the efficiency of the hydraulic pump, thereby reducing the actual output power demand of the motor by the engineering machinery to meet the output power required by the pump or the power required by the motor. The standard output torque and standard speed are preset data. The power required by the motor is the actual input power required by the motor.

[0069] Among them, the corresponding adjustment coefficient is obtained, and the corresponding specific implementation process includes: obtaining the adjustment coefficient corresponding to the engineering machinery according to the type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in the current operating state, the power properties of the hydraulic pump, the power properties of the electric motor and the preset corresponding relationship; wherein the engineering machinery is equipped with the hydraulic pump and the electric motor.

[0070] For example, the type of construction machinery, the output power of the hydraulic pump required by the construction machinery in its current operating state, the power attributes of the hydraulic pump, and the power attributes of the electric motor can be used as indexes to match against a preset correspondence to obtain a matching result; and the adjustment coefficient corresponding to the construction machinery is determined based on the matching result. The corresponding relationship is the association between the type of construction machinery, the output power of the hydraulic pump required by the construction machinery in its current operating state, the power attributes of the hydraulic pump, the power attributes of the electric motor, and the adjustment coefficient.

[0071] Further, such as Figure 3 As shown, after adjusting the output torque and speed of the motor, the method further includes: comparing the actual output power of the motor after adjusting the output torque and speed of the motor with the required output power of the motor determined in the above step to determine whether the corresponding power requirement is currently met; if not, continuing to adjust the output torque and speed of the motor; if so, obtaining the overall working efficiency of the engineering machinery; and further determining whether the overall efficiency of the engineering machinery meets the preset efficiency requirement; if not, continuing to adjust the output torque and speed of the motor. The overall working efficiency includes the efficiency of the hydraulic pump and the efficiency of the motor.

[0072] like Figure 4 The figure shows the motor efficiency MAP. As can be seen from the figure, the motor efficiency is above 94% in the range of 1000-2400rpm and 200-800Nm, that is, in the range of about 20kW to 200kW. However, the maximum operating power of a general 20-ton construction machinery is about 94kW, so the motor's high efficiency range is completely beyond the common power range. In comparison, construction machinery with the same tonnage equipped with an engine (i.e., a diesel engine) is often limited to a specific small range of calibration due to fuel efficiency issues, such as Figure 5 As shown in the figure, it is a fuel consumption chart of a diesel engine equipped with a 20-ton construction machinery. It can be seen that the high-efficiency range is relatively small, concentrated at 1250-1400rpm, 1550-1800rpm, and 400-550Nm, so its torque adjustable range is limited. Due to the superior speed regulation characteristics of the electric motor, the working efficiency range of the hydraulic pump can be given priority, as shown below: Figure 5 As shown, the horizontal and vertical axes are the speed and torque corresponding to the diesel engine respectively. It can be seen that the efficiency difference of the hydraulic pump under different pressures F and displacements V is obvious, so at this time, the output torque T is appropriately adjusted. A and speed n can significantly improve the output efficiency of the entire power system of the engineering machinery. For example, when the load is in the range of 15-20MPa, assuming that the speed before adjustment is n1 and the torque is T1 (i.e. T A =T1) After adjustment, the speed is n2 and the torque is T2. (ie after adjustment, T AEqual to T2) Figure 4 As shown in the direction of the arrow, this adjustment has little effect on the motor efficiency. The pump torque is transmitted by the motor through the coupling. The pump torque T B =F*V / 20π, F is determined by the load and remains unchanged, ΔT>0, so ΔV>0, then Δη~ΔT can be obtained through the pump efficiency MAP diagram, such as Figure 6 As shown by the middle arrow, the working efficiency of the hydraulic pump is improved at this time, while the efficiency of the electric motor is not significantly affected, thereby improving the overall output efficiency of the power system.

[0073] The power control method for engineering machinery described in an embodiment of the present invention determines the output power required by the hydraulic pump based on the current operating state of the engineering machinery, and determines the output power required by the motor based on the output power required by the hydraulic pump. The method then obtains the standard output torque and standard speed corresponding to the motor in the current operating state, and obtains a corresponding adjustment coefficient. Finally, based on the standard output torque, the standard speed, and the adjustment coefficient, the output torque and speed of the motor are adjusted to improve the efficiency of the hydraulic pump, thereby ensuring that the actual output power of the motor in the engineering machinery meets the output power required by the motor. This method can effectively utilize the motor's excellent speed regulation characteristics and strong overload capacity to improve the efficiency and accuracy of the power control of the engineering machinery, thereby enhancing the operational stability of the engineering machinery.

[0074] Corresponding to the above-mentioned power control method for construction machinery, the present invention also provides a power control system for construction machinery. Since the embodiment of the system is similar to the above-mentioned method embodiment, the description is relatively simple. For relevant details, please refer to the description of the above-mentioned method embodiment. The embodiment of the power control system for construction machinery described below is only illustrative. Please refer to Figure 7 As shown, it is a structural diagram of a power control system of an engineering machinery provided by an embodiment of the present invention.

[0075] The power control system of the engineering machinery described in the present invention specifically includes:

[0076] The hydraulic pump required output power determination unit 701 is used to determine the required output power of the hydraulic pump according to the current operating state of the engineering machinery;

[0077] a motor required output power determination unit 702, configured to determine the required output power of the motor according to the required output power of the hydraulic pump;

[0078] The power control unit 703 is used to obtain the standard output torque and standard speed corresponding to the motor in the current operating state, and obtain the corresponding adjustment coefficient; according to the standard output torque, the standard speed and the adjustment coefficient, the output torque and speed of the motor are adjusted so that the actual output power of the motor in the engineering machinery meets the output power required by the motor.

[0079] Furthermore, after adjusting the output torque and speed of the motor, the method further includes:

[0080] A judgment unit is used to compare the actual output power of the motor with the output power required by the motor to determine whether the corresponding power requirement is currently met. If so, the overall working efficiency of the engineering machinery is obtained to determine whether the overall efficiency of the engineering machinery meets the preset efficiency requirement; the overall working efficiency includes the hydraulic pump efficiency and the motor efficiency.

[0081] Furthermore, the generator required output power determination unit is specifically used to:

[0082] The output power required by the motor is determined based on the output power required by the hydraulic pump, the hydraulic pump efficiency, and the transmission efficiency between the motor and the hydraulic pump; wherein the hydraulic pump efficiency is obtained based on the standard input power and the standard output power of the hydraulic pump.

[0083] Furthermore, the power control unit is specifically used to:

[0084] The adjustment coefficient corresponding to the engineering machinery is obtained according to the type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in the current operating state, the power properties of the hydraulic pump, the power properties of the electric motor and the preset corresponding relationship; wherein the hydraulic pump and the electric motor are loaded inside the engineering machinery.

[0085] Furthermore, according to the type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in the current operating state, the power attributes of the hydraulic pump, the power attributes of the electric motor, and a preset correspondence, the adjustment coefficient corresponding to the engineering machinery is obtained, specifically including:

[0086] The type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in the current operating state, the power attribute of the hydraulic pump, and the power attribute of the electric motor are used as indexes and matched with a preset corresponding relationship to obtain a matching result; and the adjustment coefficient corresponding to the engineering machinery is determined according to the matching result;

[0087] The corresponding relationship is the relationship between the type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in the current operating state, the power attribute of the hydraulic pump, the power attribute of the motor, and the adjustment coefficient.

[0088] Furthermore, after determining the required output power of the motor, the following is also included:

[0089] a motor efficiency obtaining unit, configured to obtain the corresponding motor efficiency based on the standard input power and the standard output power of the motor;

[0090] The actual input power acquisition unit required by the motor is used for obtaining the actual input power required by the motor based on the motor efficiency and the output power required by the motor.

[0091] Furthermore, the hydraulic pump required output power determination unit is specifically used to determine the required output power of the hydraulic pump according to the current actual gear position of the engineering machinery.

[0092] The power control system for engineering machinery described in an embodiment of the present invention determines the output power required by the hydraulic pump based on the current operating state of the engineering machinery, and determines the output power required by the motor based on the output power required by the hydraulic pump. It then obtains the standard output torque and standard speed corresponding to the motor in the current operating state, and obtains a corresponding adjustment coefficient. Finally, based on the standard output torque, standard speed, and adjustment coefficient, it adjusts the output torque and speed of the motor to improve the efficiency of the hydraulic pump, thereby ensuring that the actual output power of the motor in the engineering machinery meets the output power required by the motor. This method can effectively utilize the motor's excellent speed regulation characteristics and strong overload capacity to improve the efficiency and accuracy of the power regulation of the engineering machinery, thereby enhancing the stability of the engineering machinery's operation.

[0093] Corresponding to the power control method for engineering machinery provided above, the present invention also provides an electronic device. Since the embodiment of the electronic device is similar to the embodiment of the method described above, the description is relatively simple. For relevant details, please refer to the description of the embodiment of the method described above. The electronic device described below is only for illustration. Figure 8As shown, it is a schematic diagram of the physical structure of an electronic device disclosed in an embodiment of the present invention. The electronic device may include: a processor 801, a memory 802 and a communication bus 803, wherein the processor 801 and the memory 802 communicate with each other through the communication bus 803 and communicate with the outside through the communication interface 804. The processor 801 can call the logic instructions in the memory 802 to execute the power control method of the engineering machinery, the method comprising: determining the output power required by the hydraulic pump according to the current operating state of the engineering machinery; determining the output power required by the motor according to the output power required by the hydraulic pump; obtaining the standard output torque and standard speed corresponding to the motor in the current operating state, and obtaining the corresponding adjustment coefficient; adjusting the output torque and speed of the motor according to the standard output torque, the standard speed and the adjustment coefficient so that the actual output power of the motor in the engineering machinery meets the output power required by the motor.

[0094] In addition, the logic instructions in the above-mentioned memory 802 can be implemented in the form of a software function module and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0095] On the other hand, the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the power control method of engineering machinery provided by the above methods, the method including: determining the output power required by the hydraulic pump according to the current operating state of the engineering machinery; determining the output power required by the motor according to the output power required by the hydraulic pump; obtaining the standard output torque and standard speed corresponding to the motor in the current operating state, and obtaining the corresponding adjustment coefficient; adjusting the output torque and speed of the motor according to the standard output torque, the standard speed and the adjustment coefficient, so that the actual output power of the motor in the engineering machinery meets the output power required by the motor.

[0096] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the power control method of the engineering machinery provided above, the method comprising: determining the output power required by the hydraulic pump according to the current operating state of the engineering machinery; determining the output power required by the electric motor according to the output power required by the hydraulic pump; obtaining the standard output torque and standard speed corresponding to the electric motor in the current operating state, and obtaining the corresponding adjustment coefficient; adjusting the output torque and speed of the electric motor according to the standard output torque, the standard speed and the adjustment coefficient, so that the actual output power of the electric motor in the engineering machinery meets the output power required by the electric motor.

[0097] The system embodiments described above are merely illustrative. The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, i.e., they may be located in one place or distributed across multiple network modules. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0098] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A power control method for construction machinery, characterized in that: include: Determine the required output power of the hydraulic pump according to the current operating status of the construction machinery; Determining the output power required by the electric motor according to the output power required by the hydraulic pump; Obtaining the standard output torque and standard speed corresponding to the motor in the current operating state, and obtaining the corresponding adjustment coefficient; According to the standard output torque, the standard speed and the adjustment coefficient, the output torque and the speed of the motor are adjusted so that the actual output power of the motor in the engineering machinery meets the output power required by the motor; Get the corresponding adjustment coefficient, including: Obtaining an adjustment coefficient corresponding to the engineering machinery based on the type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in its current operating state, the power attributes of the hydraulic pump, the power attributes of the electric motor, and a preset corresponding relationship; wherein the engineering machinery is internally equipped with the hydraulic pump and the electric motor; According to the type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in the current operating state, the power attribute of the hydraulic pump, the power attribute of the motor, and a preset corresponding relationship, the adjustment coefficient corresponding to the engineering machinery is obtained, specifically including: The type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in the current operating state, the power attribute of the hydraulic pump, and the power attribute of the electric motor are used as indexes and matched with a preset corresponding relationship to obtain a matching result; and the adjustment coefficient corresponding to the engineering machinery is determined according to the matching result; The corresponding relationship is the relationship between the type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in the current operating state, the power attribute of the hydraulic pump, the power attribute of the motor, and the adjustment coefficient.

2. The power control method for construction machinery according to claim 1, characterized in that: After adjusting the output torque and speed of the motor, the method further comprises: Compare the actual output power of the motor with the required output power of the motor to determine whether the corresponding power requirement is currently met. If so, obtain the overall working efficiency of the engineering machinery to determine whether the overall efficiency of the engineering machinery meets the preset efficiency requirement; wherein, the overall working efficiency includes the hydraulic pump efficiency and the motor efficiency.

3. The power control method for construction machinery according to claim 2, characterized in that: According to the output power required by the hydraulic pump, the output power required by the motor is determined, specifically including: Determine the hydraulic pump efficiency and the transmission efficiency between the electric motor and the hydraulic pump; determining the output power required by the motor according to the output power required by the hydraulic pump, the efficiency of the hydraulic pump, and the transmission efficiency between the motor and the hydraulic pump; The hydraulic pump efficiency is obtained based on the standard input power and the standard output power of the hydraulic pump.

4. The power control method for construction machinery according to claim 3, characterized in that: After determining the required output power of the motor, also include: Based on the standard input power and the standard output power of the motor, the corresponding motor efficiency is obtained; and the actual required input power of the motor is obtained based on the motor efficiency and the required output power of the motor.

5. The power control method for construction machinery according to claim 1, characterized in that: Determine the required hydraulic pump output power based on the current operating status of the construction machinery, including: detecting a current actual gear position of the engineering machinery; The required output power of the hydraulic pump is determined according to the current actual gear position.

6. A power control system for engineering machinery, characterized in that: include: A hydraulic pump required output power determination unit, configured to determine the required output power of the hydraulic pump according to the current operating state of the engineering machinery; a motor required output power determination unit, configured to determine the required output power of the motor according to the required output power of the hydraulic pump; A power control unit, configured to obtain a standard output torque and a standard speed corresponding to the motor in the current operating state, and obtain a corresponding adjustment coefficient; According to the standard output torque, the standard speed and the adjustment coefficient, the output torque and the speed of the motor are adjusted so that the actual output power of the motor in the engineering machinery meets the output power required by the motor; Get the corresponding adjustment coefficient, including: Obtaining an adjustment coefficient corresponding to the engineering machinery based on the type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in its current operating state, the power attributes of the hydraulic pump, the power attributes of the electric motor, and a preset corresponding relationship; wherein the engineering machinery is internally equipped with the hydraulic pump and the electric motor; According to the type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in the current operating state, the power attribute of the hydraulic pump, the power attribute of the motor, and a preset corresponding relationship, the adjustment coefficient corresponding to the engineering machinery is obtained, specifically including: The type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in the current operating state, the power attribute of the hydraulic pump, and the power attribute of the electric motor are used as indexes and matched with a preset corresponding relationship to obtain a matching result; and the adjustment coefficient corresponding to the engineering machinery is determined according to the matching result; The corresponding relationship is the relationship between the type of the engineering machinery, the output power of the hydraulic pump required by the engineering machinery in the current operating state, the power attribute of the hydraulic pump, the power attribute of the motor, and the adjustment coefficient.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the power control method for engineering machinery according to any one of claims 1 to 5 are implemented.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the power control method for a construction machine as claimed in any one of claims 1 to 5 are implemented.

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