CN114257154A - Air conditioner motor carrier mode control method, device and medium - Google Patents
Air conditioner motor carrier mode control method, device and medium Download PDFInfo
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- CN114257154A CN114257154A CN202111582561.3A CN202111582561A CN114257154A CN 114257154 A CN114257154 A CN 114257154A CN 202111582561 A CN202111582561 A CN 202111582561A CN 114257154 A CN114257154 A CN 114257154A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
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Abstract
The application discloses a method, a device and a medium for controlling a carrier mode of an air conditioner motor, which are used for respectively obtaining a first variable related to a carrier frequency ratio, a second variable related to a power output ratio, a third variable related to temperature and a fourth variable related to a motor electric frequency ratio, obtaining the current carrier frequency of the motor, and determining the new carrier frequency of the motor according to the first variable, the second variable, the third variable, the fourth variable and the current carrier frequency of the motor. Therefore, the method determines the new carrier frequency by acquiring the current carrier frequency and the four variables of the motor, and can control the size of the new carrier frequency because the sizes of the four variables can be changed, thereby effectively avoiding the problems that the current sampling window is small, the loading capacity of the motor is influenced, the current fundamental wave frequency is high when the motor outputs at a high speed, the efficiency of the motor is reduced and the like because the number of narrow pulses is large in a low rotating speed area of the motor when the fixed carrier frequency is adopted.
Description
Technical Field
The present application relates to the field of motor technology, and in particular, to a method, an apparatus, and a medium for controlling a carrier mode of an air conditioner motor.
Background
With the continuous development of the control technology of the permanent magnet synchronous motor, the application of the permanent magnet synchronous motor is more and more extensive, so that the products of the permanent magnet synchronous motor also gradually enter thousands of households. With the gradual popularization of permanent magnet synchronous Motor products, people have higher and higher requirements on the reliability and comfort of products applied to permanent magnet synchronous motors, and the Current Brushless Direct Current (BLDC) permanent magnet synchronous motors of air conditioners generally adopt a method of fixing carrier frequencies, such as 10KHz, 12KHz, 15KHz and 16 KHz.
Due to the carrier frequency fixing method, when three-phase/two-phase lower bridge arm series resistance sampling is used, several conditions may occur, for example, the current sampling window is small due to the fact that a plurality of narrow pulses exist in a low rotating speed area of the motor, the load carrying capacity of the motor is affected, when the motor outputs at a high speed, the current fundamental frequency is high, the carrier ratio is insufficient, and therefore the efficiency of the motor is reduced.
In view of the above-mentioned technology, it is an urgent problem to those skilled in the art to find a method for improving the efficiency of a motor.
Disclosure of Invention
In order to solve the above technical problems, an object of the present application is to provide a method, an apparatus, and a medium for controlling a carrier mode of an air conditioning motor, where the method includes:
respectively acquiring a first variable related to a carrier frequency ratio, a second variable related to a power output ratio, a third variable related to temperature and a fourth variable related to a motor electrical frequency ratio;
acquiring the current carrier frequency of the motor;
and determining the new carrier frequency of the motor according to the first variable, the second variable, the third variable, the fourth variable and the current carrier frequency.
Preferably, after the determining the new carrier of the motor, the method further includes:
acquiring the current power and rated power of the motor;
judging whether the current power is greater than one half of the rated power;
if yes, switching the wave transmitting mode into a five-segment mode;
if not, the wave sending mode is switched to a seven-segment mode.
Preferably, the obtaining of the first variable comprises:
taking any number from 0 to 2000 as the first variable;
acquiring the current output frequency of the motor;
judging whether the ratio of the current carrier frequency to the current output frequency is smaller than a first threshold value;
if so, adding 1 to the first variable, wherein the first variable is not greater than 2000;
if not, the first variable is automatically reduced by 1, wherein the first variable is not less than 0.
Preferably, the obtaining of the second variable comprises:
taking any number from-1000 to 0 as the second variable;
acquiring the ratio of the current power to the rated power;
judging whether the ratio is in a first preset range or not;
if yes, the second variable is added by 1, wherein the second variable is not larger than 0;
if not, the second variable is decreased by 1, wherein the second variable is not less than-1000.
Preferably, the obtaining of the third variable comprises:
taking any number from-1000 to 0 as the third variable;
acquiring a current temperature value of the motor;
judging whether the temperature value is smaller than a second threshold value;
if yes, the third variable is added by 1, wherein the third variable is not larger than 0;
if not, the third variable is automatically reduced by 1, wherein the third variable is not less than-1000.
Preferably, the obtaining the fourth variable comprises:
taking any number from-1000 to 0 as the fourth variable;
acquiring a fundamental frequency of the motor;
judging whether the ratio of the fundamental frequency to the current carrier frequency is greater than a third threshold value;
if yes, the fourth variable is added by 1, wherein the fourth variable is not larger than 0;
if not, the fourth variable is decreased by 1, wherein the fourth variable is not less than-1000.
Preferably, the determining a new carrier frequency of the motor according to the first variable, the second variable, the third variable, the fourth variable and the current carrier frequency comprises:
summing the first variable, the second variable, the third variable, the fourth variable, and the current carrier frequency, and taking the result as the new carrier frequency of the motor.
In order to solve the above technical problem, the present application further provides an air conditioner motor carrier mode control device, including:
the device comprises a first acquisition module, a second acquisition module and a third acquisition module, wherein the first acquisition module is used for respectively acquiring a first variable related to a carrier frequency ratio, a second variable related to a power output ratio, a third variable related to temperature and a fourth variable related to a motor electrical frequency ratio;
the second acquisition module is used for acquiring the current carrier frequency of the motor;
and the determining module is used for determining the new carrier frequency of the motor according to the first variable, the second variable, the third variable, the fourth variable and the current carrier frequency.
In order to solve the above technical problem, the present application further provides an air conditioner motor carrier mode control device, including a memory for storing a computer program;
and the processor is used for realizing the steps of the air conditioner motor carrier mode control method when executing the computer program.
To solve the technical problem, the present application further provides a computer-readable storage medium having a computer program stored thereon, where the computer program, when executed by a processor, implements the steps of the air conditioner motor carrier mode control method as described above.
According to the air conditioner motor carrier mode control method, a first variable related to a carrier frequency ratio, a second variable related to a power output ratio, a third variable related to temperature and a fourth variable related to a motor electrical frequency ratio are obtained respectively, the current carrier frequency of a motor is obtained, and the new carrier frequency of the motor is determined according to the first variable, the second variable, the third variable, the fourth variable and the current carrier frequency of the motor. Therefore, the method determines the new carrier frequency by acquiring the current carrier frequency and the four variables of the motor, and can control the size of the new carrier frequency because the sizes of the four variables can be changed, thereby effectively avoiding the problems that the current sampling window is small, the loading capacity of the motor is influenced, the current fundamental wave frequency is high when the motor outputs at a high speed, the efficiency of the motor is reduced and the like because the number of narrow pulses is large in a low rotating speed area of the motor when the fixed carrier frequency is adopted.
On this basis, this application still provides an air conditioner motor carrier mode controlling means and medium, and the effect is the same.
Drawings
In order to more clearly illustrate the embodiments of the present application, the drawings needed for the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a flowchart of a carrier mode control method for an air conditioner motor according to an embodiment of the present disclosure;
fig. 2 is a flowchart of another air conditioner motor carrier mode control method according to an embodiment of the present disclosure;
fig. 3 is a flowchart for acquiring a first variable according to an embodiment of the present application;
fig. 4 is a flowchart for obtaining a second variable according to an embodiment of the present application;
fig. 5 is a flowchart for acquiring a third variable according to an embodiment of the present application;
fig. 6 is a flowchart for acquiring a fourth variable according to an embodiment of the present application;
fig. 7 is a structural diagram of a carrier mode control device of an air conditioner motor according to an embodiment of the present disclosure;
fig. 8 is a structural diagram of an air conditioner motor carrier mode control device according to another embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.
The core of the application is to provide a method, a device and a medium for controlling the carrier mode of an air conditioner motor. In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings.
Fig. 1 is a flowchart of a carrier mode control method for an air conditioner motor according to an embodiment of the present disclosure, in which a carrier mode control method is mainly applied to BLDC and permanent magnet synchronous motors in an air conditioner, and as shown in fig. 1, the carrier mode control method for the air conditioner motor includes the following steps:
s10: a first variable related to a carrier frequency ratio, a second variable related to a power output ratio, a third variable related to temperature and a fourth variable related to a motor electrical frequency ratio are respectively obtained.
S11: and acquiring the current carrier frequency of the motor.
S12: and determining the new carrier frequency of the motor according to the first variable, the second variable, the third variable, the fourth variable and the current carrier frequency.
It can be understood that, with the continuous development of the control technology of the permanent magnet synchronous motor, the application of the permanent magnet synchronous motor is more and more extensive, so that the products of the permanent magnet synchronous motor also gradually enter thousands of households. With the gradual popularization of permanent magnet synchronous motor products, people have higher and higher requirements on the reliability and comfort of products applied to the permanent magnet synchronous motors, and the current air conditioner BLDC permanent magnet synchronous motor generally adopts a method of fixing carrier frequency, such as 10KHz, 12KHz, 15KHz and 16 KHz. Due to the carrier frequency fixing method, when three-phase/two-phase lower bridge arm series resistance sampling is used, several conditions may occur, for example, in a low rotating speed area of a motor, the current sampling window is small due to the fact that multiple narrow pulses exist, the load carrying capacity of the motor is affected, and when the motor outputs at a high speed, the current fundamental frequency is high, the efficiency of the motor is reduced, and the like. Therefore, the embodiments of the present application change carrier frequencies in the BLDC and the permanent magnet synchronous motor, solving the above-described problems.
As indicated by step S10, a first variable related to the carrier frequency ratio, a second variable related to the power output ratio, a third variable related to the temperature, and a fourth variable related to the motor electrical frequency ratio are obtained, respectively. The first variable is related to the carrier frequency ratio, i.e. the ratio of the carrier frequency to the output frequency influences the magnitude of the first variable, the second variable is related to the power output ratio, i.e. the magnitude of the second variable is influenced by the current power and the rated power of the motor, the third variable is related to the temperature, i.e. the magnitude of the temperature influences the magnitude of the third variable, and the fourth variable is related to the motor electrical frequency ratio, i.e. the motor fundamental frequency and the current carrier frequency influence the magnitude of the fourth variable. It should be noted that, in this embodiment, the ranges of the first variable, the second variable, the third variable, and the fourth variable are not limited, and the ranges of the variables may be selected according to specific implementation situations, and step S11 illustrates that the current carrier frequency of the motor is obtained, and how to obtain the current carrier frequency of the motor is not limited in this embodiment.
In addition, in step S12, it is mentioned that the new carrier frequency of the motor is determined according to the first variable, the second variable, the third variable, the fourth variable and the current carrier frequency, and how to determine the new carrier frequency of the motor is not limited in this embodiment, the first variable, the second variable, the third variable, the fourth variable and the current carrier frequency may be added, and as a result, the new carrier frequency may be obtained, and weights may be set for the first variable, the second variable, the third variable, the fourth variable and the current carrier frequency, respectively, that is, coefficients may be set for each variable and carrier frequency and then added. The manner in which the new carrier frequency of the motor is determined may be selected depending on the particular implementation.
In the air conditioner motor carrier mode control method provided by this embodiment, a first variable related to a carrier frequency ratio, a second variable related to a power output ratio, a third variable related to a temperature, and a fourth variable related to a motor electrical frequency ratio are respectively obtained, a current carrier frequency of a motor is obtained, and a new carrier frequency of the motor is determined according to the first variable, the second variable, the third variable, the fourth variable, and the current carrier frequency of the motor. Therefore, the method determines the new carrier frequency by acquiring the current carrier frequency and the four variables of the motor, and can control the size of the new carrier frequency because the sizes of the four variables can be changed, thereby effectively avoiding the problems that the current sampling window is small, the loading capacity of the motor is influenced, the current fundamental wave frequency is high when the motor outputs at a high speed, the efficiency of the motor is reduced and the like because the number of narrow pulses is large in a low rotating speed area of the motor when the fixed carrier frequency is adopted.
Fig. 2 is a flowchart of another air conditioner motor carrier mode control method provided in an embodiment of the present application, and as shown in fig. 2, on the basis of the foregoing embodiment, after determining a new carrier of a motor, the method further includes the following steps:
s13: and acquiring the current power and rated power of the motor.
S14: and judging whether the current power is greater than one half of the rated power, if so, entering the step S15, and if not, entering the step S16.
S15: the wave-emitting mode is switched to a five-segment mode.
S16: the wave-emitting mode is switched to a seven-segment mode.
It should be noted that how to obtain the current power of the motor is not limited in this embodiment, and the current power may be obtained directly, or may be determined through speed conversion, and may be determined according to a specific implementation situation. In addition, the present embodiment is to determine whether the current power is greater than one half of the rated power, and the one half of the rated power proposed in the present embodiment is only a preferred implementation, and specific numbers can be selected according to specific situations.
In addition, there are a five-stage wave transmission method and a seven-stage wave transmission method, and the five-stage wave transmission method has a smaller switching frequency than the seven-stage wave transmission method, and if the current power is greater than one-half of the rated power, it is described that the current power is too high, which results in an excessively high carrier frequency, and the switching frequency increases, and the loss to the switch also increases. Therefore, when the current power is greater than one-half of the rated power, the wave-transmitting mode is switched to the five-segment mode, so that the switching frequency can be reduced, and the loss of the switch is reduced.
The present embodiment provides a method for determining a wave-transmitting mode, where the method determines whether a current power is greater than one-half of a rated power by obtaining the current power and the rated power of a motor, and if so, switches the wave-transmitting mode to a five-segment mode, and if not, switches the wave-transmitting mode to a seven-segment mode. Therefore, the method judges whether the wave-emitting mode of the motor needs to be switched into the five-segment mode or not according to the current power and the rated power of the motor, effectively reduces the switching times, reduces the switching loss and improves the motor efficiency when the power is too high.
On the basis of the foregoing embodiment, how to obtain the first variable related to the carrier-to-frequency ratio is defined, fig. 3 is a flowchart for obtaining the first variable according to an embodiment of the present application, and as shown in fig. 3, obtaining the first variable includes the following steps:
s17: any number from 0 to 2000 is taken as the first variable.
S18: and acquiring the current output frequency of the motor.
S19: and judging whether the ratio of the current carrier frequency to the current output frequency is smaller than a first threshold value, if so, entering the step S20, and if not, entering the step S21.
S20: the first variable is added by 1.
S21: the first variable is decremented by 1.
It should be noted that, the embodiment is to limit how to obtain the first variable related to the carrier-to-frequency ratio, but is not limited to this method, and the embodiment is merely a preferred embodiment, and how to obtain the first variable related to the carrier-to-frequency ratio may be selected according to specific implementation situations. In addition, any number from 0 to 2000 is mentioned as the first variable in the step, that is, the range of the first variable is 0 to 2000, the range of the first variable in this embodiment is only a preferred embodiment, and the range of the first variable can be selected according to specific implementation situations. In addition, how to obtain the current output frequency of the motor is not limited, and on this basis, the first threshold is not limited in this embodiment as long as the ratio of the current carrier frequency to the current output frequency can be determined.
It can be seen that when the ratio of the current carrier frequency to the current output frequency is smaller than the first threshold, the first variable is self-increased by 1, and when the ratio of the current carrier frequency to the current output frequency is greater than the first threshold, the first variable is self-decreased by 1, that is, an arbitrary number value within 0 to 2000 is taken as the first variable at the beginning, and there is no influence on the last number of the first variable, and the first variable will be self-increased or self-decreased according to the requirement and finally be increased or decreased to the required value, and it is noted that the final result of the self-increase or self-decrease of the first variable will not exceed the range of the first variable, that is, the self-decrease limit of the first variable is 0, and the self-increase limit is 2000.
In the embodiment, any number from 0 to 2000 is taken as a first variable to obtain a first variable related to the carrier frequency ratio, and then the current output frequency of the motor is obtained, and whether the ratio of the current carrier frequency to the current output frequency is smaller than a first threshold is determined, if yes, the first variable is added by 1, and if not, the first variable is subtracted by 1. Therefore, according to the method, whether the first variable is automatically added or automatically reduced to a required value is determined according to the ratio of the current carrier frequency to the output frequency, the accuracy of determining the first variable is effectively improved, and the efficiency of the motor is improved.
On the basis of the foregoing embodiment, this embodiment defines how to obtain the second variable related to the power output ratio, fig. 4 is a flowchart for obtaining the second variable provided in the embodiment of the present application, and as shown in fig. 4, obtaining the second variable related to the power output ratio includes the following steps:
s22: any number from-1000 to 0 is taken as the second variable.
S23: and acquiring the ratio of the current power to the rated power.
S24 judges whether the ratio is in the first preset range, if yes, the step is entered into S25, if no, the step is entered into S26.
S25: the second variable is added.
S26: the second variable is decremented by 1.
It should be noted that any number in the range of-1000 to 0 is extracted as the second variable in the step, that is, the range of the second variable is-1000 to 0, and the range of the second variable in this embodiment is only a preferred embodiment, and the range of the second variable can be selected according to specific implementation situations. In addition, the first preset range is not limited in this embodiment, but within the first preset range, the second variable needs to be added by 1, for example, when the ratio is between 0.2 and 1.2, or between 0.3 and 1.3, the second variable needs to be added by 1. In addition, since the rated power of the motor is fixed, it can also be understood that the second variable needs to be added by 1 when the current power of the motor is in a certain range.
It can be seen that the second variable is added by 1 when the ratio of the current power to the rated power is within the first preset range, and is subtracted by 1 when the ratio of the current power to the rated power is not within the first preset range, that is, the value of the second variable is initially taken within-1000 to 0, which has no influence on the final result of the second variable, and the second variable is added or subtracted by itself according to the requirement and finally added or subtracted to the required value, and it is noted that the final result of the addition or subtraction of the second variable does not exceed the range of the second variable, that is, the limit of the subtraction of the second variable is-1000, and the limit of the addition is 0.
In the embodiment, the second variable related to the power output ratio is obtained, a ratio between the current power and the rated power is obtained by taking any number from-1000 to 0 as the second variable, and whether the ratio is within a first preset range is determined, if so, the second variable is automatically added with 1, and if not, the second variable is automatically subtracted with 1. The method judges the final result of the second variable according to the ratio of the current power and the rated power of the motor, accurately determines the required second variable, effectively improves the efficiency of the motor and improves the accuracy of determining the second variable.
On the basis of the foregoing embodiment, this embodiment defines how to obtain the third variable related to temperature, and fig. 5 is a flowchart for obtaining the third variable provided in this embodiment of the application, and as shown in the figure, the step of obtaining the third variable related to temperature includes:
s27: any number from-1000 to 0 is taken as the third variable.
S28: and acquiring the current temperature value of the motor.
S29: and judging whether the temperature value is smaller than a second threshold value, if so, entering the step S30, and if not, entering the step S31.
S30: the third variable is added by 1.
S31: the third variable is decremented by 1.
It should be noted that any number in the range of-1000 to 0 is taken as the third variable in step, that is, the range of the third variable is-1000 to 0, and the range of the third variable in this embodiment is only a preferred embodiment, and the range of the third variable can be selected according to specific implementation situations. In addition, the specific size of the second threshold is not limited in this embodiment, and only the size of the second threshold needs to meet the criterion of judgment. When the temperature reaches the second threshold value, the current motor temperature is too high, which affects the loading capacity of the motor, so that the carrier frequency needs to be reduced, and the third variable is automatically reduced by 1.
It can be seen that, when the temperature value of the motor is less than the second threshold, the third variable is added by 1, and when the temperature value of the motor is not less than the second threshold, the third variable is subtracted by 1, that is, the value of the third variable is initially taken within-1000 to 0, and the final result of the third variable is not affected, and the third variable is added or subtracted by itself according to the requirement, and finally added or subtracted to the required value, and it is noted that the final result of the addition or subtraction of the third variable does not exceed the range of the third variable, that is, the limit of the subtraction of the third variable is-1000, and the limit of the addition is 0.
In the embodiment, the third variable related to the temperature is obtained by first taking any number from-1000 to 0 as the third variable, then obtaining the current temperature value of the motor, and determining whether the temperature value is smaller than the second threshold, if so, the third variable is automatically added with 1, and if not, the third variable is automatically subtracted with 1. The value of the third variable can be accurately obtained, and when the temperature of the motor is too high, the third variable is automatically reduced by 1, so that the carrier frequency of the motor is reduced, and the influence on the loading capacity of the motor caused by the fact that the temperature of the motor is continuously increased is avoided.
On the basis of the foregoing embodiments, how to obtain the fourth variable related to the electrical frequency ratio of the motor is defined, and fig. 6 is a flowchart for obtaining the fourth variable according to an embodiment of the present application, and as shown in the figure, obtaining the fourth variable related to the electrical frequency ratio of the motor includes the following steps:
s32: any number from-1000 to 0 is taken as the fourth variable.
S33: and acquiring the fundamental frequency of the motor.
S34: and judging whether the ratio of the fundamental frequency to the current carrier frequency is greater than a third threshold value, and if so, entering the step S35. If not, the process proceeds to step S36.
S35: the fourth variable is added by 1.
S36: the fourth variable is decremented by 1.
It should be noted that any number from-1000 to 0 is taken as the fourth variable in step, that is, the range of the fourth variable is-1000 to 0, the range of the fourth variable in this embodiment is only a preferred embodiment, and the range of the fourth variable can be selected according to specific implementation conditions. In addition, the specific size of the third threshold is not limited in this embodiment, and it is only necessary that the size of the third threshold meets the criterion of judgment. And when the ratio of the fundamental frequency to the current carrier frequency is smaller than a third threshold, the carrier frequency of the current motor is over high, so that the fourth variable is required to be automatically reduced by 1, and the carrier frequency of the motor is reduced.
It can be seen that, when the ratio of the fundamental frequency to the current carrier frequency of the motor is greater than the third threshold, the fourth variable is added by 1, and when the ratio of the fundamental frequency to the current carrier frequency of the motor is not greater than the third threshold, the fourth variable is subtracted by 1, that is, the value of the fourth variable is initially taken within-1000 to 0, and the final result of the fourth variable is not affected, the magnitude of the fourth variable is added or subtracted by itself according to the requirement, and finally added or subtracted to the required value, it is noted that the final result of the addition or subtraction of the fourth variable does not exceed the range of the fourth variable, that is, the limit of the subtraction of the fourth variable is-1000, and the limit of the addition is 0.
In the embodiment, the fourth variable related to the electrical frequency ratio of the motor is obtained by taking any number from-1000 to 0 as the fourth variable, then obtaining the fundamental frequency of the motor, and determining whether the ratio of the fundamental frequency to the current carrier frequency is greater than a third threshold, if so, adding 1 to the fourth variable, and if not, subtracting 1 from the fourth variable. It can be seen that, in the method, when the ratio of the fundamental frequency of the motor to the current carrier frequency is not greater than the third threshold, the fourth variable is decreased by 1, that is, when the current carrier frequency of the motor is too high, the fourth variable is decreased by 1, so that the carrier frequency is reduced, and the use efficiency of the motor is effectively improved.
On the basis of the above embodiment, it is defined how to determine the new carrier frequency, specifically, the first variable, the second variable, the third variable, the fourth variable and the current carrier frequency are summed, and the result is taken as the new carrier frequency of the motor.
Therefore, according to the method for determining the new carrier frequency provided by the embodiment, the sum of the first variable, the second variable, the third variable, the fourth variable and the current carrier frequency is used as the new carrier frequency, and the magnitude of each variable is influenced by each factor, so that when the current carrier frequency is too high, adaptive change is made, the current carrier frequency can be effectively reduced, the efficiency of the whole motor is effectively improved, and the purpose of reducing the heat generation of a power device is also achieved.
In the above embodiments, the air conditioner motor carrier mode control method is described in detail, and the application also provides embodiments corresponding to the permanent magnet motor carrier device. It should be noted that the present application describes the embodiments of the apparatus portion from two perspectives, one from the perspective of the function module and the other from the perspective of the hardware.
On the basis that the embodiments corresponding to the air conditioner motor carrier mode control method are described in detail, the application also discloses an air conditioner motor carrier mode control device corresponding to the method. Fig. 7 is a structural diagram of an air conditioner motor carrier mode control device according to an embodiment of the present application. As shown in fig. 7, the air conditioner motor carrier mode control device includes:
a first obtaining module 17 is configured to obtain a first variable related to a carrier frequency ratio, a second variable related to a power output ratio, a third variable related to a temperature, and a fourth variable related to a motor electrical frequency ratio, respectively.
And a second obtaining module 18, configured to obtain a current carrier frequency of the motor.
And the determining module 19 is used for determining the new carrier frequency of the motor according to the first variable, the second variable, the third variable, the fourth variable and the current carrier frequency.
Fig. 8 is a structural diagram of an air conditioner motor carrier mode control device according to another embodiment of the present application, and as shown in fig. 8, the air conditioner motor carrier mode control device includes: a memory 20 for storing a computer program;
a processor 21 for implementing the steps of the air conditioner motor carrier mode control method as mentioned in the above embodiments when executing the computer program.
The air conditioner motor carrier mode control device provided by this embodiment may include, but is not limited to, a smart phone, a tablet computer, a notebook computer, or a desktop computer.
The processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 21 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 21 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 21 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the display screen. In some embodiments, the processor 21 may further include an AI (Artificial Intelligence) processor for processing a calculation operation related to machine learning.
The memory 20 may include one or more computer-readable storage media, which may be non-transitory. Memory 20 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used for storing the following computer program 201, wherein after being loaded and executed by the processor 21, the computer program can implement the relevant steps of the air conditioner motor carrier mode control method disclosed in any one of the foregoing embodiments. In addition, the resources stored in the memory 20 may also include an operating system 202, data 203, and the like, and the storage manner may be a transient storage manner or a permanent storage manner. Operating system 202 may include, among others, Windows, Unix, Linux, and the like. The data 203 may include, but is not limited to, data for controlling a carrier mode control method of the air conditioner motor, and the like.
In some embodiments, the air conditioner motor carrier mode control device may further include a display screen 22, an input/output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.
Those skilled in the art will appreciate that the configuration shown in fig. 8 does not constitute a limitation of the air conditioner carrier mode control device and may include more or fewer components than those shown.
Finally, the application also provides a corresponding embodiment of the computer readable storage medium. The computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps as set forth in the above-mentioned method embodiments.
It is to be understood that if the method in the above embodiments is implemented in the form of software functional units and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium and executes all or part of the steps of the methods described in the embodiments of the present application, or all or part of the technical solutions. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The method, the device and the medium for controlling the carrier mode of the air conditioner motor provided by the application are described in detail above. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A carrier mode control method for an air conditioner motor is characterized by comprising the following steps:
respectively acquiring a first variable related to a carrier frequency ratio, a second variable related to a power output ratio, a third variable related to temperature and a fourth variable related to a motor electrical frequency ratio;
acquiring the current carrier frequency of the motor;
and determining the new carrier frequency of the motor according to the first variable, the second variable, the third variable, the fourth variable and the current carrier frequency.
2. The air conditioner motor carrier mode control method according to claim 1, further comprising, after the determining the new carrier of the motor:
acquiring the current power and rated power of the motor;
judging whether the current power is greater than one half of the rated power;
if yes, switching the wave transmitting mode into a five-segment mode;
if not, the wave sending mode is switched to a seven-segment mode.
3. The air conditioner motor carrier mode control method of claim 2, wherein obtaining the first variable comprises:
taking any number from 0 to 2000 as the first variable;
acquiring the current output frequency of the motor;
judging whether the ratio of the current carrier frequency to the current output frequency is smaller than a first threshold value;
if so, adding 1 to the first variable, wherein the first variable is not greater than 2000;
if not, the first variable is automatically reduced by 1, wherein the first variable is not less than 0.
4. The air conditioner motor carrier mode control method according to claim 2 or 3, wherein acquiring the second variable includes:
taking any number from-1000 to 0 as the second variable;
acquiring the ratio of the current power to the rated power;
judging whether the ratio is in a first preset range or not;
if yes, the second variable is added by 1, wherein the second variable is not larger than 0;
if not, the second variable is decreased by 1, wherein the second variable is not less than-1000.
5. The air conditioner motor carrier mode control method of claim 4, wherein obtaining the third variable comprises:
taking any number from-1000 to 0 as the third variable;
acquiring a current temperature value of the motor;
judging whether the temperature value is smaller than a second threshold value;
if yes, the third variable is added by 1, wherein the third variable is not larger than 0;
if not, the third variable is automatically reduced by 1, wherein the third variable is not less than-1000.
6. The air conditioner motor carrier mode control method according to claim 5, wherein acquiring the fourth variable includes:
taking any number from-1000 to 0 as the fourth variable;
acquiring a fundamental frequency of the motor;
judging whether the ratio of the fundamental frequency to the current carrier frequency is greater than a third threshold value;
if yes, the fourth variable is added by 1, wherein the fourth variable is not larger than 0;
if not, the fourth variable is decreased by 1, wherein the fourth variable is not less than-1000.
7. The air conditioner motor carrier mode control method of claim 5, wherein said determining a new carrier frequency of the motor based on the first variable, the second variable, the third variable, the fourth variable and the current carrier frequency comprises:
summing the first variable, the second variable, the third variable, the fourth variable, and the current carrier frequency, and taking the result as the new carrier frequency of the motor.
8. An air conditioner motor carrier mode control device, characterized by comprising:
the device comprises a first acquisition module, a second acquisition module and a third acquisition module, wherein the first acquisition module is used for respectively acquiring a first variable related to a carrier frequency ratio, a second variable related to a power output ratio, a third variable related to temperature and a fourth variable related to a motor electrical frequency ratio;
the second acquisition module is used for acquiring the current carrier frequency of the motor;
and the determining module is used for determining the new carrier frequency of the motor according to the first variable, the second variable, the third variable, the fourth variable and the current carrier frequency.
9. The air conditioner motor carrier mode control device is characterized by comprising a memory, a control unit and a control unit, wherein the memory is used for storing a computer program;
a processor for implementing the steps of the air conditioner motor carrier mode control method according to any one of claims 1 to 7 when executing said computer program.
10. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the air conditioner motor carrier mode control method according to any one of claims 1 to 7.
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