Energy efficiency calculation methods and devices, carbon emission calculation methods and systems, and storage media

Abstract

This application provides an energy efficiency calculation method and apparatus, a carbon emission calculation method and system, and a storage medium. The energy efficiency calculation method includes: obtaining a first actual temperature rise during motor operation; the first actual temperature rise is characterized as the difference between the first actual temperature of the motor and a first ambient temperature; calculating the actual energy efficiency of the motor based on the heat dissipation coefficient and the first actual temperature rise; the heat dissipation coefficient is obtained by: obtaining the rated operating parameters and second actual operating parameters of the motor; the second actual operating parameters include the second actual temperature rise of the motor; the second actual temperature rise is characterized as the difference between the second actual temperature of the motor and a second ambient temperature; converting the second actual temperature rise into the rated temperature rise of the motor under rated conditions based on the second actual operating parameters and the rated operating parameters; and calculating the heat dissipation coefficient based on the rated temperature rise, the second actual operating parameters, and the rated operating parameters. This method calculates the actual energy efficiency of the motor based on the heat dissipation coefficient and the first actual temperature rise, improving the calculation accuracy.

Description

Technical Field

[0001] This application relates to the field of motor energy efficiency measurement and testing, specifically to an energy efficiency calculation method and device, a carbon emission calculation method and system, and a storage medium. Background Technology

[0002] Energy efficiency is the ratio of the amount of energy that plays a role in energy utilization (actual output energy) to the amount of energy that is actually consumed. In actual operation of a motor, it is difficult to detect the output energy of the motor.

[0003] Since it is difficult to detect and calculate the energy efficiency of motors in actual operation, the current method for estimating the actual operating efficiency of motors is mainly to estimate it through parameters such as input power and current during motor operation.

[0004] However, the accuracy of the energy efficiency of the motor in actual operation obtained by this estimation method is obviously not high enough. Summary of the Invention

[0005] The purpose of this application is to provide an energy efficiency calculation method and apparatus, a carbon emission calculation method and system, and a storage medium, which obtains the actual temperature rise of the motor during operation and calculates the actual energy efficiency of the motor based on the heat dissipation coefficient and the temperature rise, thereby solving the problem of low accuracy in the calculation of motor energy efficiency in the prior art.

[0006] In a first aspect, this application provides an energy efficiency calculation method, the method comprising: obtaining a first actual temperature rise during motor operation; the first actual temperature rise being characterized as the difference between the first actual temperature of the motor and a first ambient temperature; and calculating the actual energy efficiency of the motor based on a heat dissipation coefficient and the first actual temperature rise; wherein the heat dissipation coefficient is obtained by the following calculation method: obtaining the rated operating parameters and second actual operating parameters of the motor; the second actual operating parameters including the second actual temperature rise of the motor; the second actual temperature rise being characterized as the difference between the second actual temperature of the motor and a second ambient temperature; converting the second actual temperature rise into the rated temperature rise of the motor under rated conditions based on the second actual operating parameters and the rated operating parameters; and calculating the heat dissipation coefficient based on the rated temperature rise, the second actual operating parameters, and the rated operating parameters.

[0007] The above-mentioned energy efficiency calculation method improves the accuracy of motor energy efficiency calculation by obtaining the second actual temperature rise of the motor, calculating the heat dissipation coefficient of the motor, and calculating the actual energy efficiency of the motor during operation based on the heat dissipation coefficient and the first actual temperature rise. In particular, it improves the accuracy of energy efficiency calculation for motors operating under S1 duty cycle.

[0008] In conjunction with the first aspect, optionally, in the method of obtaining the heat dissipation coefficient, obtaining the rated operating parameters and the second actual operating parameters of the motor includes: obtaining the second real-time temperature of the motor at a preset second time interval; determining whether the second temperature difference between the two most recently obtained second real-time temperatures is less than a second preset temperature difference value; if it is determined that the second temperature difference is less than the second preset temperature difference value, then either of the two most recently obtained second real-time temperatures is determined as the second actual temperature.

[0009] The above-mentioned energy efficiency calculation method determines whether the second temperature difference between the two most recent second real-time temperatures is less than the second preset temperature difference value, thereby confirming whether the second real-time temperature after the motor starts has stabilized, and determines the second real-time temperature after it has stabilized as the second actual temperature. This improves the calculation accuracy of the heat dissipation coefficient and thus also improves the calculation accuracy of the motor energy efficiency.

[0010] In conjunction with the first aspect, optionally, in the method of obtaining the heat dissipation coefficient, obtaining the rated operating parameters and the second actual operating parameters of the motor includes: obtaining the new machine operating parameters of the motor when it is running in a new machine state; wherein, the new machine operating parameters include the new machine operating temperature rise of the motor; the new machine operating temperature rise is characterized as the difference between the new machine operating temperature of the motor when it is running in a new machine state and the corresponding new machine ambient temperature; the step of converting the actual temperature rise into the rated temperature rise of the motor in the rated state according to the second actual operating parameters and the rated operating parameters includes: converting the new machine operating temperature rise into the new machine rated temperature rise of the motor in the rated state according to the new machine operating parameters and the rated operating parameters; the step of calculating the heat dissipation coefficient according to the rated temperature rise, the second actual operating parameters, and the rated operating parameters includes: calculating the heat dissipation coefficient according to the new machine rated temperature rise, the new machine operating parameters, and the rated operating parameters.

[0011] The above-mentioned energy efficiency calculation method obtains the operating parameters of the motor when it is running in a new state, calculates the rated temperature rise of the new motor in a new state, and calculates the heat dissipation coefficient through the rated temperature rise of the new motor. This avoids the error in the calculation of the rated temperature rise caused by motor aging after multiple runs, thereby improving the accuracy of the heat dissipation coefficient calculation and ultimately improving the accuracy of the motor energy efficiency calculation.

[0012] In conjunction with the first aspect, optionally, wherein the rated operating parameters include the rated operating current, and the second actual operating parameters include the second actual operating current; in the method of obtaining the heat dissipation coefficient, the step of converting the second actual temperature rise into the rated temperature rise of the motor under rated conditions based on the second actual operating parameters and the rated operating parameters includes: calculating the rated temperature rise according to a temperature rise conversion algorithm; the calculation formula of the temperature rise conversion algorithm is:

[0013]

[0014] Where, Δθ N The rated temperature rise is given, Δθ is the second actual temperature rise, I is the second actual operating current, and I... e θ2 is the rated operating current, θ2 is the second actual temperature of the motor, and K1 is the reciprocal of the resistivity of the motor at 0℃.

[0015] The aforementioned energy efficiency calculation method, due to the relatively high accuracy of the rated temperature rise calculated by the temperature rise conversion algorithm, improves the accuracy of the heat dissipation coefficient calculation, and ultimately improves the accuracy of the motor energy efficiency calculation.

[0016] In conjunction with the first aspect, optionally, the rated operating parameters include the rated operating efficiency and rated operating power of the motor; in the method of obtaining the heat dissipation coefficient, calculating the heat dissipation coefficient based on the rated temperature rise, the second actual operating parameters, and the rated operating parameters includes: calculating the heat dissipation coefficient according to the heat dissipation coefficient calculation formula; the heat dissipation coefficient calculation formula is:

[0017]

[0018] Among them, K A P is the heat dissipation coefficient. e The rated operating power, η e For the rated operating efficiency, Δθ N This refers to the rated temperature rise.

[0019] The above energy efficiency calculation method, using the above heat dissipation coefficient calculation formula, has a relatively high accuracy in calculating the heat dissipation coefficient, thereby improving the accuracy of motor energy efficiency calculation.

[0020] In conjunction with the first aspect, optionally, obtaining the first actual temperature rise and heat dissipation coefficient of the motor includes: obtaining the first real-time temperature of the motor at a preset first time interval; determining whether the first temperature difference between the two most recently obtained first real-time temperatures is less than a first preset temperature difference value; if it is determined that the first temperature difference is less than the first preset temperature difference value, then determining either of the two most recently obtained first real-time temperatures as the first actual temperature.

[0021] The above-mentioned energy efficiency calculation method determines whether the first temperature difference between the two most recent first real-time temperatures is less than the first preset temperature difference value, thereby confirming whether the first real-time temperature after the motor starts has stabilized, and then determines the first real-time temperature after it has stabilized as the first actual temperature, thus improving the accuracy of motor energy efficiency calculation.

[0022] Secondly, this application also provides a method for calculating carbon emissions, the method comprising:

[0023] Based on the rated operating power of the motor and the actual energy efficiency, calculate the carbon emissions of the motor during the target time period; the formula for calculating the carbon emissions is:

[0024] CER = K·P e (1-η1)·t

[0025] Where CER is the carbon emission rate, K is the carbon emission coefficient, and P is the carbon emission factor. e The rated operating power is η1, the actual energy efficiency is calculated according to the energy efficiency calculation method provided by the first aspect above, or any optional embodiment of the first aspect, and t is the duration of the target time period.

[0026] The above-mentioned carbon emission calculation method calculates the actual energy efficiency of the motor by using the energy efficiency calculation method provided in the above embodiments of this application, and calculates the carbon emission during the operation of the motor by combining the carbon emission calculation formula, thereby improving the calculation accuracy of carbon emission and making it easier to take more practical environmental protection and energy-saving measures based on the carbon emission.

[0027] This application also provides an energy efficiency calculation device, which includes: an acquisition module and a calculation module; the acquisition module is used to acquire a first actual temperature rise during motor operation; the first actual temperature rise is characterized as the difference between the first actual temperature of the motor and the first ambient temperature; the calculation module is used to calculate the actual energy efficiency of the motor based on the heat dissipation coefficient and the actual temperature rise; wherein, the calculation module is further used to acquire the heat dissipation coefficient by: acquiring the rated operating parameters and second actual operating parameters of the motor; the second actual operating parameters include the second actual temperature rise of the motor; the second actual temperature rise is characterized as the difference between the second actual temperature of the motor and the second ambient temperature; converting the second actual temperature rise into the rated temperature rise of the motor under rated conditions based on the second actual operating parameters; and calculating the heat dissipation coefficient based on the rated temperature rise and the second actual operating parameters.

[0028] The energy efficiency calculation device described above has the same beneficial effects as the energy efficiency calculation method provided by the first aspect or any optional embodiment of the first aspect, which will not be elaborated here.

[0029] Fourthly, embodiments of this application also provide a carbon emission calculation system, which includes the energy efficiency calculation device described in the third aspect above; the energy efficiency calculation device is further used to calculate the carbon emission of the motor within a target time period based on the rated operating power of the motor and the actual energy efficiency; the formula for calculating the carbon emission is:

[0030] CER = K·Pe (1-η1)·t

[0031] Where CER is the carbon emission rate, K is the carbon emission coefficient, and P is the carbon emission factor. e η1 is the rated operating power, η1 is the actual energy efficiency, and t is the duration of the target time period.

[0032] The energy efficiency calculation device described above has the same beneficial effects as the carbon emission calculation method provided in the second aspect above, which will not be elaborated here.

[0033] Fifthly, this application also provides an electronic device, including: a processor and a memory, the memory storing machine-readable instructions executable by the processor, which, when executed by the processor, perform the methods described above.

[0034] The aforementioned electronic device has the same beneficial effects as the carbon emission calculation system provided by the first aspect, any optional embodiment of the first aspect, or the second aspect, and will not be elaborated here.

[0035] Sixthly, this application also provides a storage medium, including a computer-readable storage medium on which a computer program is stored, the computer program being executed by a processor to perform the methods described above.

[0036] The aforementioned storage medium has the same beneficial effects as the carbon emission calculation system provided by the first aspect, any alternative implementation of the first aspect, or the second aspect, and will not be elaborated here.

[0037] In summary, the energy efficiency calculation method and apparatus, carbon emission calculation method and system, and storage medium provided in this application improve the accuracy of motor energy efficiency calculation by acquiring the actual temperature rise during motor operation and calculating the actual energy efficiency of the motor based on the heat dissipation coefficient and this temperature rise. Specifically, determining the first real-time temperature at which the region stabilizes after motor startup as the first actual temperature further improves the accuracy of motor energy efficiency calculation. Furthermore, determining the second real-time temperature at which the region stabilizes after motor startup as the second actual temperature, and acquiring the motor temperature rise in a new machine state and calculating the rated temperature rise of the new machine, both improve the accuracy of the heat dissipation coefficient calculation, thereby further improving the accuracy of motor energy efficiency calculation, especially for motors operating under S1 duty cycle. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A flowchart of the energy efficiency calculation method provided in the embodiments of this application;

[0040] Figure 2 A flowchart illustrating the acquisition of the heat dissipation coefficient in the energy efficiency calculation method provided in this application embodiment;

[0041] Figure 3 A detailed flowchart of step S220 in the process of obtaining the heat dissipation coefficient provided in the embodiments of this application;

[0042] Figure 4 Detailed flowchart of step S120 in the energy efficiency calculation method provided in the embodiments of this application;

[0043] Figure 5 A schematic diagram of the energy efficiency calculation device provided in the embodiments of this application;

[0044] Figure 6 This is a schematic diagram of the carbon emission calculation system provided in the embodiments of this application;

[0045] Figure 7 A schematic diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0046] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0048] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0049] The applicant discovered in their research that of the energy actually consumed by a motor, a portion is converted into mechanical energy output by the motor, and the other portion is converted into heat energy (energy loss). The actual energy consumed by the motor can be calculated based on the rated parameters given on the motor's nameplate, while the converted heat energy can be calculated based on the motor's temperature rise. Therefore, the actual energy efficiency of the motor can be calculated based on the actual energy consumed and the energy lost. For details, please refer to the embodiments and accompanying drawings provided in this application.

[0050] Please refer to Figure 1 , Figure 1 This is a flowchart of the energy efficiency calculation method provided in the embodiments of this application. The energy efficiency calculation method provided in the embodiments of this application includes:

[0051] Step S120: Obtain the first actual temperature rise during motor operation.

[0052] The first actual temperature rise is characterized as the difference between the first actual temperature of the motor and the first ambient temperature.

[0053] In step S120 above, the first actual temperature can be obtained by measuring the temperature of the motor housing using a temperature sensor. The first ambient temperature can be obtained by measuring the ambient temperature of the environment in which the motor is located using a temperature sensor.

[0054] Obtain the first actual temperature of the motor and the first ambient temperature.

[0055] Step S140: Calculate the actual energy efficiency of the motor based on the heat dissipation coefficient and the first actual temperature rise.

[0056] In step S140 above, the heat dissipation coefficient represents the power loss of the motor per unit temperature rise. The formula for calculating this power loss can be:

[0057] P k =K A ·Δθ R

[0058] Among them, P k For power loss, K A Let Δθ be the heat dissipation coefficient. R This is the first actual temperature rise.

[0059] Accordingly, the formula for calculating motor energy efficiency can be:

[0060]

[0061] Wherein, P1 is the input power of the motor, which can be obtained by measuring the input current and input voltage of the motor.

[0062] Please Figure 1Based on reference Figure 2 , Figure 2 This is a flowchart illustrating the process of obtaining the heat dissipation coefficient in the energy efficiency calculation method provided in this application embodiment. The methods for obtaining the heat dissipation coefficient include the following calculation methods:

[0063] Step S220: Obtain the rated operating parameters and the second actual operating parameters of the motor.

[0064] The second actual operating parameter includes the second actual temperature rise of the motor; the second actual temperature rise is characterized as the difference between the second actual temperature of the motor and the second ambient temperature.

[0065] In step S220 above, the second actual temperature can also be obtained by measuring the temperature of the motor housing using a temperature sensor. The second ambient temperature can be obtained by measuring the ambient temperature of the environment in which the motor is located using a temperature sensor. The rated operating parameters of the motor include, but are not limited to: rated power, rated current, rated voltage, and rated efficiency. These rated operating parameters can be obtained from the nameplate information on the motor.

[0066] Step S240: Based on the second actual operating parameters, the rated operating parameters, and the rated operating parameters, convert the second actual temperature rise into the rated temperature rise of the motor under rated conditions.

[0067] In step S240 above, the rated temperature rise can be calculated based on the principle of resistance heating.

[0068] Step S260: Calculate the heat dissipation coefficient based on the rated temperature rise, the second actual operating parameters, and the rated operating parameters.

[0069] In step S260 above, the heat dissipation coefficient can be calculated based on the motor's rated power, rated efficiency, and rated temperature rise.

[0070] In the above implementation process, by obtaining the second actual temperature rise of the motor, the heat dissipation coefficient of the motor is calculated, and the actual energy efficiency of the motor during operation is calculated based on the heat dissipation coefficient and the first actual temperature rise, the accuracy of the motor energy efficiency calculation is improved, especially the accuracy of the energy efficiency calculation of the S1 duty cycle motor is improved.

[0071] Please refer to Figure 3 , Figure 3 This is a detailed flowchart of step S220 in the process of obtaining the heat dissipation coefficient provided in the embodiments of this application. In an optional implementation, in the method of obtaining the heat dissipation coefficient, step S220 includes:

[0072] Step S221: Obtain the second real-time temperature of the motor at a preset second time interval.

[0073] In step S221 above, the preset second time interval can be 20 minutes, 30 minutes, or 40 minutes, etc.

[0074] Step S222: Determine whether the second temperature difference between the two most recently acquired second real-time temperatures is less than the second preset temperature difference value.

[0075] In step S222 above, the second preset temperature difference value can be 0.5℃, 1℃, or 1.5℃, etc.

[0076] If it is determined that the second temperature difference is less than the second preset temperature difference value, then step S223 is executed: either of the two most recently acquired second real-time temperatures is determined as the second actual temperature.

[0077] In step S223 above, the second actual temperature is the temperature at which the motor runs until the second real-time temperature tends to stabilize after it starts.

[0078] In the above implementation process, by judging whether the second temperature difference between the two most recent second real-time temperatures is less than the second preset temperature difference value, it is confirmed whether the second real-time temperature after the motor starts has become stable, and the second real-time temperature after becoming stable is determined as the second actual temperature, which improves the calculation accuracy of the heat dissipation coefficient and thus also improves the calculation accuracy of the motor energy efficiency.

[0079] In an optional implementation, in the method of obtaining the heat dissipation coefficient, step S220 above includes:

[0080] Step S224: Obtain the new machine operating parameters when the motor is running in the new machine state.

[0081] Among them, the operating parameters of the new machine include the first actual temperature rise of the motor when it is running in the new machine state; the operating temperature rise of the new machine is characterized by the difference between the operating temperature of the motor when it is running in the new machine state and the corresponding ambient temperature of the new machine.

[0082] Accordingly, step S240 above includes:

[0083] Step S241: Based on the new machine's operating parameters and rated operating parameters, convert the new machine's operating temperature rise into the new machine's rated temperature rise under rated conditions.

[0084] Accordingly, step S260 above includes:

[0085] Step S261: Calculate the heat dissipation coefficient based on the new machine's rated temperature rise, new machine operating parameters, and rated operating parameters.

[0086] In the above steps, "new machine status" refers to the first N runs after the motor is assembled, leaves the factory, or its operating environment is configured, where N > 1. The "new machine status" of the motor can also refer to the first N runs after the motor has been repaired or modified and its corresponding rated parameters have been updated.

[0087] In the above implementation process, by obtaining the operating parameters of the new machine when the motor is running in the new machine state, the rated temperature rise of the new machine in the new machine state is calculated, and the heat dissipation coefficient is calculated by using the rated temperature rise of the new machine. This avoids the error in the calculation of the rated temperature rise caused by the aging of the motor after multiple runs, thereby improving the accuracy of the heat dissipation coefficient calculation and ultimately improving the accuracy of the motor energy efficiency calculation.

[0088] In one optional implementation, the rated operating parameters include the rated operating current, and the second actual operating parameters include the second actual operating current.

[0089] Accordingly, in the method of obtaining the heat dissipation coefficient, step S240 above includes:

[0090] Step S242: Calculate the rated temperature rise according to the temperature rise conversion algorithm. The calculation formula for this temperature rise conversion algorithm is:

[0091]

[0092] Where, Δθ N The rated temperature rise is given, Δθ is the second actual temperature rise, and I is the second actual operating current. e θ2 is the rated operating current, θ2 is the second actual temperature of the motor, and K1 is the reciprocal of the motor's resistivity at 0℃.

[0093] In the above implementation process, the rated temperature rise calculated by this temperature rise conversion algorithm has relatively high accuracy. Therefore, calculating the rated temperature rise using this algorithm improves the accuracy of the heat dissipation coefficient calculation, and ultimately improves the accuracy of the motor energy efficiency calculation.

[0094] In one alternative implementation, the rated operating parameters include the motor's rated operating efficiency and rated operating power.

[0095] Accordingly, in the method of obtaining the heat dissipation coefficient, step S260 above includes:

[0096] Step S262: Calculate the heat dissipation coefficient according to the heat dissipation coefficient calculation formula; the heat dissipation coefficient calculation formula is:

[0097]

[0098] Among them, K A P is the heat dissipation coefficient. e Rated operating power, ηe For rated operating efficiency, Δθ N This is the rated temperature rise.

[0099] In the above implementation process, the heat dissipation coefficient calculated by the above heat dissipation coefficient calculation formula has relatively high accuracy, thereby improving the accuracy of motor energy efficiency calculation.

[0100] Please refer to Figure 4 , Figure 4 This is a detailed flowchart of step S120 in the energy efficiency calculation method provided in this application embodiment. In an optional implementation, step S120 includes:

[0101] Step S121: Obtain the first real-time temperature of the motor at a preset first time interval.

[0102] In step S121 above, the preset first time interval can also be 20 minutes, 30 minutes, or 40 minutes, etc.

[0103] Step S122: Determine whether the first temperature difference between the two most recently acquired first real-time temperatures is less than the first preset temperature difference value.

[0104] In step S122 above, the first preset temperature difference value can also be 0.5℃, 1℃, or 1.5℃, etc.

[0105] If it is determined that the first temperature difference is less than the first preset temperature difference value, then step S123 is executed: either of the two most recently acquired first real-time temperatures is determined as the first actual temperature.

[0106] In step S123 above, the first actual temperature is also the temperature when the motor starts running until the first real-time temperature tends to stabilize.

[0107] In the above implementation process, by judging whether the first temperature difference between the two most recent first real-time temperatures is less than the first preset temperature difference value, it is confirmed whether the first real-time temperature after the motor starts has become stable, and the first real-time temperature after it has become stable is determined as the first actual temperature, thereby improving the calculation accuracy of motor energy efficiency.

[0108] Based on the same inventive concept, the carbon emission calculation method provided in the embodiments of this application includes:

[0109] Step S10: Calculate the carbon emissions of the motor during the target time period based on its rated operating power and actual energy efficiency. The formula for calculating these carbon emissions is:

[0110] CER = K·P e (1-η1)·t

[0111] Where CER is carbon emission, K is carbon emission coefficient, and Pe η1 is the rated operating power, η1 is the actual energy efficiency calculated according to the above energy efficiency calculation method embodiment, and t is the duration of the target time period.

[0112] In the above implementation process, the actual energy efficiency of the motor is calculated by the energy efficiency calculation method provided by the above embodiments of this application, and the carbon emission during the operation of the motor is calculated by combining the carbon emission calculation formula, which improves the calculation accuracy of carbon emission and makes it easier to take more practical environmental protection and energy-saving measures based on the carbon emission.

[0113] Based on the same inventive concept, please refer to Figure 5 , Figure 5 This is a schematic diagram of the energy efficiency calculation device 500 provided in an embodiment of this application. The energy efficiency calculation device 500 provided in an embodiment of this application includes: an acquisition module 510 and a calculation module 520.

[0114] The acquisition module 510 is used to acquire the first actual temperature rise during motor operation; the first actual temperature rise is characterized as the difference between the first actual temperature of the motor and the first ambient temperature.

[0115] The calculation module is used to calculate the actual energy efficiency of the motor based on the heat dissipation coefficient and the actual temperature rise.

[0116] The calculation module 520 is also used to obtain the heat dissipation coefficient through the following calculation method:

[0117] Obtain the rated operating parameters and the second actual operating parameters of the motor; the second actual operating parameters include the second actual temperature rise of the motor; the second actual temperature rise is characterized as the difference between the second actual temperature of the motor and the second ambient temperature; convert the second actual temperature rise into the rated temperature rise of the motor under rated conditions based on the second actual operating parameters; calculate the heat dissipation coefficient based on the rated temperature rise and the second actual operating parameters.

[0118] Please continue to refer to Figure 5 In one optional implementation, during the process of obtaining the heat dissipation coefficient of the rated operating parameters and the second actual operating parameters of the motor, the calculation module 520 is specifically used to: obtain the second real-time temperature of the motor at a preset second time interval; determine whether the second temperature difference between the two most recently obtained second real-time temperatures is less than a second preset temperature difference value; if it is determined that the second temperature difference is less than the second preset temperature difference value, then determine either of the two most recently obtained second real-time temperatures as the second actual temperature.

[0119] Please continue to refer to Figure 5In one optional implementation, during the process of obtaining the heat dissipation coefficient of the motor's rated operating parameters and second actual operating parameters, the calculation module 520 is specifically used to: obtain the new machine operating parameters of the motor when it is running in a new machine state. The new machine operating parameters include the new machine operating temperature rise of the motor; the new machine operating temperature rise is characterized as the difference between the new machine operating temperature of the motor when it is running in a new machine state and the corresponding new machine ambient temperature.

[0120] Accordingly, in the process of obtaining the heat dissipation coefficient by converting the actual temperature rise into the rated temperature rise of the motor under rated conditions based on the second actual operating parameters and the rated operating parameters, the above calculation module 520 is specifically used to: convert the operating temperature rise of the new machine into the rated temperature rise of the motor under rated conditions based on the new machine operating parameters and the rated operating parameters.

[0121] Accordingly, in the process of obtaining the heat dissipation coefficient based on the rated temperature rise, the second actual operating parameters, and the rated operating parameters, the above-mentioned calculation module 520 is specifically used to: calculate the heat dissipation coefficient based on the rated temperature rise of the new machine, the operating parameters of the new machine, and the rated operating parameters.

[0122] Please continue to refer to Figure 5 In one optional implementation, the rated operating parameters include the rated operating current, and the second actual operating parameters include the second actual operating current.

[0123] Accordingly, in the process of obtaining the heat dissipation coefficient by converting the second actual temperature rise into the rated temperature rise of the motor under rated conditions based on the second actual operating parameters and the rated operating parameters, the above-mentioned calculation module 520 is specifically used to: calculate the rated temperature rise according to the temperature rise conversion algorithm; the calculation formula of the temperature rise conversion algorithm is:

[0124]

[0125] Where, Δθ N The rated temperature rise is given, Δθ is the second actual temperature rise, and I is the second actual operating current. e θ2 is the rated operating current, θ2 is the second actual temperature of the motor, and K1 is the reciprocal of the motor's resistivity at 0℃.

[0126] Please continue to refer to Figure 5 In one optional implementation, the rated operating parameters include the motor's rated operating efficiency and rated operating power.

[0127] Accordingly, in the process of obtaining the heat dissipation coefficient based on the rated temperature rise, the second actual operating parameters, and the rated operating parameters, the aforementioned calculation module 520 is specifically used to: calculate the heat dissipation coefficient according to the heat dissipation coefficient calculation formula. The heat dissipation coefficient calculation formula is:

[0128]

[0129] Among them, K A P is the heat dissipation coefficient. e Rated operating power, η e For rated operating efficiency, Δθ N This is the rated temperature rise.

[0130] Please continue to refer to Figure 5 In one optional implementation, during the process of obtaining the first actual temperature rise and heat dissipation coefficient of the motor, the acquisition module 510 is specifically used to: obtain the first real-time temperature of the motor at a preset first time interval; determine whether the first temperature difference between the two most recently obtained first real-time temperatures is less than a first preset temperature difference value; if it is determined that the first temperature difference is less than the first preset temperature difference value, then determine either of the two most recently obtained first real-time temperatures as the first actual temperature.

[0131] It should be understood that this device corresponds to the above-described energy efficiency calculation method embodiment and is capable of performing the various steps involved in the above method embodiment. The specific functions of this device can be referred to the description above, and detailed descriptions are appropriately omitted here to avoid repetition. The device includes at least one software functional module that can be stored in memory or embedded in the device's operating system (OS) in the form of software or firmware.

[0132] Based on the same inventive concept, please refer to Figure 6 , Figure 6 This is a schematic diagram of the carbon emission calculation system 60 provided in this application embodiment. The carbon emission calculation system 60 provided in this application embodiment includes: the energy efficiency calculation device 500 provided in the above example. The second calculation device is further used to calculate the carbon emission of the motor within a target time period based on the motor's rated operating power and actual energy efficiency. The formula for calculating the carbon emission is:

[0133] CER = K·P e (1-η1)·t

[0134] Where CER is carbon emission, K is carbon emission coefficient, and P e η1 represents the rated operating power, η1 represents the actual energy efficiency, and t represents the duration of the target time period.

[0135] Based on the same inventive concept, please refer to Figure 7 , Figure 7 This is a schematic diagram of the structure of the electronic device 700 provided in an embodiment of this application. The electronic device 700 may include a memory 711, a memory controller 712, a processor 713, a peripheral interface 714, an input / output unit 715, and a display unit 716. Those skilled in the art will understand that... Figure 7The structure shown is for illustrative purposes only and does not limit the structure of the electronic device 700. For example, the electronic device 700 may also include components that are more... Figure 7 The more or fewer components shown, or having the same Figure 7 The different configurations shown.

[0136] The aforementioned memory 711, memory controller 712, processor 713, peripheral interface 714, input / output unit 715, and display unit 716 are electrically connected directly or indirectly to each other to achieve data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines. The aforementioned processor 713 is used to execute executable modules stored in the memory.

[0137] The memory 711 can be, but is not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), etc. The memory 711 stores programs, and the processor 713 executes these programs upon receiving execution instructions. The methods executed by the electronic device 700, as defined in any embodiment of this application, can be applied to or implemented by the processor 713.

[0138] The aforementioned processor 713 may be an integrated circuit chip with signal processing capabilities. The processor 713 may be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it may also be a digital signal processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor.

[0139] The peripheral interface 714 described above couples various input / output devices to the processor 713 and the memory 711. In some embodiments, the peripheral interface 714, the processor 713, and the memory controller 712 can be implemented in a single chip. In other instances, they can be implemented by separate chips.

[0140] The input / output unit 715 described above is used to provide user input data. The input / output unit 715 may be, but is not limited to, a mouse and a keyboard.

[0141] The aforementioned display unit 716 provides an interactive interface (e.g., a user interface) between the electronic device 700 and the user, or displays image data for the user's reference. In this embodiment, the display unit can be a liquid crystal display (LCD) or a touch display. If it is a touch display, it can be a capacitive touchscreen or a resistive touchscreen that supports single-point and multi-point touch operations. Supporting single-point and multi-point touch operations means that the touch display can sense touch operations generated simultaneously from one or more locations on the touch display and pass the sensed touch operations to the processor for calculation and processing.

[0142] The electronic device 700 in this embodiment can be used to perform the various steps in the various methods provided in the embodiments of this application.

[0143] This application also provides a storage medium storing a computer program, which is executed by a processor to perform the above-described method.

[0144] The storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Programmable Red-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0145] In summary, the energy efficiency calculation method and apparatus, carbon emission calculation method and system, and storage medium provided in this application improve the accuracy of motor energy efficiency calculation by acquiring the actual temperature rise of the motor during operation and calculating the actual energy efficiency of the motor based on the heat dissipation coefficient and the temperature rise. Specifically, determining the first real-time temperature at which the region stabilizes after motor startup as the first actual temperature further improves the accuracy of motor energy efficiency calculation. Furthermore, determining the second real-time temperature at which the region stabilizes after motor startup as the second actual temperature, and acquiring the motor temperature rise in a new machine state and calculating the rated temperature rise of the new machine, both improve the accuracy of the heat dissipation coefficient calculation, thereby further improving the accuracy of motor energy efficiency calculation, especially for motors operating under S1 duty cycle.

[0146] It should be understood that the disclosed apparatus, system, and method can also be implemented in other ways, as provided in the embodiments of this application. The apparatus and system embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a device, program segment, or part of code, and a module, device, program segment, or part of code contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may execute substantially in parallel in real time, or they may sometimes execute in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0147] In addition, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0148] The above description is only an optional implementation of the embodiments of this application, but the protection scope of the embodiments of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the embodiments of this application should be covered within the protection scope of the embodiments of this application.

Claims

1. A method of motor efficiency calculation, characterized by, The method comprises: obtaining a first actual temperature rise of the motor during operation; the first actual temperature rise is represented as a difference between a first actual temperature of the motor and a first ambient temperature; and calculating an actual energy efficiency of the motor according to a heat dissipation coefficient and the first actual temperature rise; wherein the heat dissipation coefficient is obtained in the following manner: obtaining rated operating parameters and second actual operating parameters of the motor; the second actual operating parameters comprise a second actual temperature rise of the motor; the second actual temperature rise is represented as a difference between a second actual temperature of the motor and a second ambient temperature; converting the second actual temperature rise into a rated temperature rise of the motor in a rated state according to the second actual operating parameters and the rated operating parameters; calculating the heat dissipation coefficient according to the rated temperature rise and the rated operating parameters; the obtaining of the first actual temperature rise of the motor during operation comprises: obtaining a first real-time temperature of the motor at a preset first time interval; determining whether a first temperature difference between the two most recently obtained first real-time temperatures is less than a first preset temperature difference value; if it is determined that the first temperature difference is less than the first preset temperature difference value, then determining either of the two most recently obtained first real-time temperatures as the first actual temperature.

2. The energy efficiency calculation method of claim 1, wherein, in the manner of obtaining the heat dissipation coefficient, the obtaining of the rated operating parameters and the second actual operating parameters of the motor comprises: obtaining a second real-time temperature of the motor at a preset second time interval; determining whether a second temperature difference between the two most recently obtained second real-time temperatures is less than a second preset temperature difference value; if it is determined that the second temperature difference is less than the second preset temperature difference value, then determining either of the two most recently obtained second real-time temperatures as the second actual temperature.

3. The energy efficiency calculation method of claim 1, wherein, in the manner of obtaining the heat dissipation coefficient, the obtaining of the rated operating parameters and the second actual operating parameters of the motor comprises: obtaining new machine operating parameters of the motor during operation in a new machine state; wherein the new machine operating parameters comprise a new machine operating temperature rise of the motor; the new machine operating temperature rise is represented as a difference between a new machine operating temperature of the motor during operation in the new machine state and a corresponding new machine ambient temperature; the converting of the second actual temperature rise into a rated temperature rise of the motor in a rated state according to the second actual operating parameters and the rated operating parameters comprises: converting the new machine operating temperature rise into a new machine rated temperature rise of the motor in a rated state according to the new machine operating parameters and the rated operating parameters; the calculating of the heat dissipation coefficient according to the rated temperature rise and the rated operating parameters comprises: calculating the heat dissipation coefficient according to the new machine rated temperature rise, the new machine operating parameters and the rated operating parameters.

4. The energy efficiency computation method of claim 1, wherein, wherein, the rated operating parameters comprise a rated operating current, and the second actual operating parameters comprise a second actual operating current; in the manner of obtaining the heat dissipation coefficient, the converting of the second actual temperature rise into a rated temperature rise of the motor in a rated state according to the second actual operating parameters and the rated operating parameters comprises: calculating the rated temperature rise according to a temperature rise conversion algorithm; the calculation formula of the temperature rise conversion algorithm is: wherein θ N is the rated temperature rise, θ is the second actual temperature rise, I is the second actual operating current, I N is the rated operating current, θ 2 is the second actual temperature of the electric machine, K 1 is the inverse of the electric machine's resistance coefficient at 0°C.

5. The energy efficiency computation method of claim 1, wherein, wherein, The rated operation parameters include a rated operation efficiency and a rated operation power of the motor; In the obtaining manner of the heat dissipation coefficient, the calculating the heat dissipation coefficient according to the rated temperature rise and the rated operation parameters comprises: calculating the heat dissipation coefficient according to a heat dissipation coefficient calculation formula; the heat dissipation coefficient calculation formula is: wherein, K A is the heat dissipation coefficient, P e is the nominal operating power, η e is the nominal operating efficiency, θ N is the nominal temperature rise.

6. A carbon discharge amount calculation method characterized by comprising: The method comprises: calculating, according to the rated operation power of the motor and the actual energy efficiency, a carbon emission of the motor in a target time period; the calculation formula of the carbon emission is: wherein, CER is the carbon emission, K is the carbon emission coefficient, P e is the rated operating power, η 1 is the actual energy efficiency calculated according to the energy efficiency calculation method of any one of claims 1 to 5, t is the length of the target time period.

7. An electric machine efficiency calculation apparatus, characterized by comprising: The device comprises an obtaining module and a calculating module. The obtaining module is configured to obtain a first actual temperature rise of the motor in operation; the first actual temperature rise represents a difference between a first actual temperature of the motor and a first ambient temperature; The calculating module is configured to calculate an actual energy efficiency of the motor according to a heat dissipation coefficient and the first actual temperature rise. In the process of obtaining the first actual temperature rise of the motor in operation, the obtaining module is specifically configured to: obtain a first real-time temperature of the motor at a preset first time interval; determine whether a first temperature difference between the first real-time temperatures obtained at the last two times is less than a first preset temperature difference value; if it is determined that the first temperature difference is less than the first preset temperature difference value, determine any one of the first real-time temperatures obtained at the last two times as the first actual temperature. The calculating module is further configured to obtain the heat dissipation coefficient by the following calculation manner: obtain rated operation parameters and second actual operation parameters of the motor; the second actual operation parameters include a second actual temperature rise of the motor; the second actual temperature rise represents a difference between a second actual temperature of the motor and a second ambient temperature; convert the second actual temperature rise into a rated temperature rise of the motor in a rated state according to the second actual operation parameters and the rated operation parameters; and calculate the heat dissipation coefficient according to the rated temperature rise and the rated operation parameters.

8. A carbon emission amount calculation system characterized by comprising: The system comprises the energy efficiency calculating device according to claim 7. The energy efficiency calculating device is further configured to calculate a carbon emission of the motor in a target time period according to the rated operation power of the motor and the actual energy efficiency; the calculation formula of the carbon emission is: wherein, CER is the carbon emission, K is the carbon emission coefficient, P e is the rated operating power, η 1 is the actual energy efficiency, t is the duration of the target time period.

9. A storage medium, characterized by The storage medium comprises a computer readable storage medium, and the computer readable storage medium stores a computer program; when the computer program is run by a processor, the method according to any one of claims 1 to 6 is executed.

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