CN116972520A - Method and device for controlling compressor, air conditioner and storage medium - Google Patents
Method and device for controlling compressor, air conditioner and storage medium Download PDFInfo
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- CN116972520A CN116972520A CN202210427730.4A CN202210427730A CN116972520A CN 116972520 A CN116972520 A CN 116972520A CN 202210427730 A CN202210427730 A CN 202210427730A CN 116972520 A CN116972520 A CN 116972520A
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- 238000010586 diagram Methods 0.000 description 11
- 238000012937 correction Methods 0.000 description 10
- 238000004891 communication Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 6
- 238000005070 sampling Methods 0.000 description 5
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- 238000006243 chemical reaction Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 101000841267 Homo sapiens Long chain 3-hydroxyacyl-CoA dehydrogenase Proteins 0.000 description 1
- 102100029107 Long chain 3-hydroxyacyl-CoA dehydrogenase Human genes 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
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- JJYKJUXBWFATTE-UHFFFAOYSA-N mosher's acid Chemical compound COC(C(O)=O)(C(F)(F)F)C1=CC=CC=C1 JJYKJUXBWFATTE-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
- F24F2110/64—Airborne particle content
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Control Of Ac Motors In General (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application relates to the technical field of intelligent household appliances, and discloses a method for controlling a compressor, wherein a driving circuit of the compressor comprises the following components: a rectifying circuit for rectifying an ac input voltage; the input side of the boosting circuit is connected with the rectifying circuit, and the output side of the boosting circuit is connected with the direct current bus and is used for boosting the output voltage of the rectifying circuit; the method comprises the following steps: obtaining a phase voltage peak value of the compressor; determining a first direct current bus voltage according to the phase voltage peak value; obtaining an alternating current input voltage; determining a second direct current bus voltage according to the alternating current input voltage; and determining the target direct current bus voltage according to the first direct current bus voltage and the second direct current bus voltage. The determination of the target direct current bus voltage is respectively based on the phase voltage peak value and the alternating current input voltage of the compressor, so that the utilization rate of the direct current bus voltage is improved. The application also discloses a device for controlling the compressor, an air conditioner and a storage medium.
Description
Technical Field
The application relates to the technical field of intelligent household appliances, in particular to a method and a device for controlling a compressor, an air conditioner and a storage medium.
Background
At present, the air conditioner realizes the flow of the refrigerant in the pipeline through the operation of the compressor. The operation of the compressor under different working conditions is realized through the control of the driving circuit on the compressor.
The related art method for controlling a compressor includes: acquiring a load parameter and a power supply voltage of a compressor; calculating a boost coefficient of a power factor correction (PFC, power Factor Correction) boost circuit based on the load parameter; calculating to obtain a direct-current reference voltage of the driving circuit according to the boosting coefficient and the power supply voltage; and carrying out feedback control on the power factor correction boost circuit by taking the direct current reference voltage as a target value so as to adjust the direct current bus voltage.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
the method can control the compressor, and reduce the loss of devices in the booster circuit by adjusting the voltage of the direct current bus. However, the boost factor is determined based on the load parameter of the compressor, and the dc reference voltage is determined based on the boost factor and the supply voltage. When the output value of the power supply voltage is smaller, the calculated direct current reference voltage is smaller than the target value, so that the utilization rate of the direct current bus voltage is low.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides a method and a device for controlling a compressor, an air conditioner and a storage medium, so as to improve the utilization rate of direct current bus voltage.
In some embodiments, the driving circuit of the compressor includes: a rectifying circuit for rectifying an ac input voltage; the input side of the boosting circuit is connected with the rectifying circuit, and the output side of the boosting circuit is connected with the direct current bus and is used for boosting the output voltage of the rectifying circuit; the method comprises the following steps: obtaining a phase voltage peak value of the compressor; determining a first direct current bus voltage according to the phase voltage peak value; obtaining an alternating current input voltage; determining a second direct current bus voltage according to the alternating current input voltage; and determining the target direct current bus voltage according to the first direct current bus voltage and the second direct current bus voltage.
Optionally, determining the target dc bus voltage according to the first dc bus voltage and the second dc bus voltage includes: determining a relationship between a first dc bus voltage and a second dc bus voltage; under the condition that the first direct current bus voltage is smaller than the second direct current bus voltage, determining that the target direct current bus voltage is the second direct current bus voltage; and determining the target direct current bus voltage as the first direct current bus voltage under the condition that the first direct current bus voltage is larger than or equal to the second direct current bus voltage.
Optionally, determining the target dc bus voltage according to the first dc bus voltage and the second dc bus voltage further includes: determining the relation between the target direct current bus voltage and the limit value of the direct current bus voltage; under the condition that the target direct current bus voltage is larger than the direct current bus voltage limiting value, the target direct current bus voltage is adjusted to the direct current bus voltage limiting value; and under the condition that the target direct current bus voltage is smaller than or equal to the limit value of the direct current bus voltage, keeping the target direct current bus voltage unchanged.
Optionally, determining the first dc bus voltage from the phase voltage peak value includes: obtaining a target utilization rate of the direct current bus voltage; and determining the ratio of the peak value of the phase voltage to the target utilization rate of the direct current bus voltage as the first direct current bus voltage.
Optionally, determining the second dc bus voltage from the ac input voltage includes: determining an average value of the alternating current input voltage according to the alternating current input voltage; determining an alternating current input voltage peak value according to the alternating current input voltage average value; and determining the second direct current bus voltage according to the alternating current input voltage peak value.
Optionally, determining the second dc bus voltage from the ac input voltage peak value includes: obtaining a boosting coefficient; and determining the product of the alternating current input voltage peak value and the boost coefficient as a second direct current bus voltage.
Optionally, obtaining a phase voltage peak of the compressor includes: obtaining direct axis current and quadrature axis current of the compressor; determining the direct-axis voltage and the quadrature-axis voltage of the compressor according to the direct-axis current and the quadrature-axis current; and determining the phase voltage peak value of the compressor according to the direct axis voltage and the quadrature axis voltage.
In some embodiments, the apparatus comprises a processor and a memory storing program instructions, the processor being configured to perform the above-described method for controlling the compressor when the program instructions are run.
In some embodiments, the air conditioner includes: a compressor; the driving circuit is connected with the compressor and is used for outputting a driving signal to the compressor; and, the above-mentioned device for controlling a compressor; wherein the driving circuit includes: a rectifying circuit for rectifying an ac input voltage; the input side of the boosting circuit is connected with the rectifying circuit, and the output side of the boosting circuit is connected with the direct current bus and is used for boosting the output voltage of the rectifying circuit; and the input side of the inverter circuit is connected with the direct current bus, and the output side of the inverter circuit is connected with the compressor.
In some embodiments, the storage medium stores program instructions that, when executed, perform the above-described method for controlling a compressor.
The method and the device for controlling the compressor, the air conditioner and the storage medium provided by the embodiment of the disclosure can realize the following technical effects:
a phase voltage peak of the compressor is obtained. And determining the first direct current bus voltage of the booster circuit according to the phase voltage peak value as one of the undetermined target direct current bus voltages. An ac input voltage is obtained. And determining a second direct current bus voltage of the booster circuit according to the alternating current input voltage, wherein the second direct current bus voltage is used as one of the undetermined target direct current bus voltages. And determining a target direct current bus voltage as an expected output voltage of the booster circuit according to the first direct current bus voltage and the second direct current bus voltage of the booster circuit. The determination of the target direct current bus voltage is respectively based on the phase voltage peak value and the alternating current input voltage of the compressor, and the optimal direct current bus voltage is determined as the target direct current bus voltage, so that the target direct current bus voltage reaches the target value, and the utilization rate of the direct current bus voltage is improved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
fig. 1 is a schematic structural view of an air conditioner according to an embodiment of the present disclosure;
FIG. 2 is a control flow diagram of a method for controlling a compressor provided by an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a method for controlling a compressor provided by an embodiment of the present disclosure;
FIG. 4 is a schematic illustration of another method for controlling a compressor provided by an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of another method for controlling a compressor provided by an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of another method for controlling a compressor provided by an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of another method for controlling a compressor provided by an embodiment of the present disclosure;
fig. 8 is a schematic view of an apparatus for controlling a compressor provided in an embodiment of the present disclosure.
Reference numerals:
11: a compressor; 12: a driving circuit; 13: a control circuit; 121: a rectifying circuit; 122: a booster circuit; 123: an inverter circuit; 41: a processor; 42: a memory; 43: a communication interface; 44: a bus.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
As shown in connection with fig. 1, an embodiment of the present disclosure provides an air conditioner including a compressor 11 and a driving circuit 12. The driving circuit 12 is connected to the compressor 11 and outputs a driving signal to the compressor 11. The driving circuit 12 includes a rectifying circuit 121, a boosting circuit 122, and an inverter circuit 123. The input side of the rectifier circuit 121 is connected to an ac input power source, and rectifies an ac input voltage. The booster circuit 122 has an input side connected to an output side of the rectifier circuit 121, and an output side connected to a dc bus for boosting the output voltage of the rectifier circuit 121. In addition to boosting, the boosting circuit 122 is also used for power factor correction, and improves the utilization rate of electric energy. The inverter circuit 123 has an input side connected to the dc bus and an output side connected to the compressor 11, and converts the dc bus voltage into an ac voltage with an adjustable frequency. The circuit structures of the rectifying circuit 121, the boost circuit 122 and the inverter circuit 123 are topology structures in the prior art, and are not described here.
Optionally, the air conditioner further comprises a control circuit 13. The control circuit 13 is connected to the compressor 11 and the drive circuit 12, and controls the drive circuit 12 based on a phase voltage peak of the compressor 11.
As shown in connection with fig. 2, an embodiment of the present disclosure provides a control flow diagram of a method for controlling a compressor. The figure shows the information flow during control, eventually outputting the target dc bus voltage of the boost circuit. The target direct current bus voltage can dynamically follow the phase voltage peak value of the compressor and the change of alternating current input voltage, so that the loss of devices in the driving circuit is reduced, and the utilization rate of the direct current bus voltage is improved. Wherein U is pp Is the phase voltage peak value of the compressor, eta is the target utilization rate of the voltage of the direct current bus, U dc1 For the first DC bus voltage, U ac For sampling the AC input voltage, U aca Is the average value of the alternating input voltage, alpha is the conversion coefficient, U acp Is the peak value of the alternating current input voltage, R is the boost coefficient, U dc2 For the second DC bus voltage, U dcm U is the limit value of the voltage of the direct current bus dct Is the target dc bus voltage.
As shown in connection with fig. 3, an embodiment of the present disclosure provides a method for controlling a compressor, including:
s210, the air conditioner obtains a phase voltage peak value of the compressor.
S220, the air conditioner determines a first direct current bus voltage according to the phase voltage peak value.
S230, the air conditioner obtains alternating current input voltage.
S240, the air conditioner determines a second direct current bus voltage according to the alternating current input voltage.
S250, the air conditioner determines a target direct current bus voltage according to the first direct current bus voltage and the second direct current bus voltage.
By adopting the method for controlling the compressor provided by the embodiment of the disclosure, the phase voltage peak value of the compressor is obtained. And determining the first direct current bus voltage of the booster circuit according to the phase voltage peak value as one of the undetermined target direct current bus voltages. An ac input voltage is obtained. And determining a second direct current bus voltage of the booster circuit according to the alternating current input voltage, wherein the second direct current bus voltage is used as one of the undetermined target direct current bus voltages. And determining a target direct current bus voltage as an expected output voltage of the booster circuit according to the first direct current bus voltage and the second direct current bus voltage of the booster circuit. The determination of the target direct current bus voltage is respectively based on the phase voltage peak value and the alternating current input voltage of the compressor, and the optimal direct current bus voltage is determined as the target direct current bus voltage, so that the target direct current bus voltage reaches the target value, and the utilization rate of the direct current bus voltage is improved.
As shown in connection with fig. 4, an embodiment of the present disclosure provides another method for controlling a compressor, including:
s211, the air conditioner obtains direct axis current and quadrature axis current of the compressor.
S212, the air conditioner determines the direct axis voltage and the quadrature axis voltage of the compressor according to the direct axis current and the quadrature axis current.
S213, the air conditioner determines a phase voltage peak value of the compressor according to the direct axis voltage and the quadrature axis voltage.
S220, the air conditioner determines a first direct current bus voltage according to the phase voltage peak value.
S230, the air conditioner obtains alternating current input voltage.
S240, the air conditioner determines a second direct current bus voltage according to the alternating current input voltage.
S250, the air conditioner determines a target direct current bus voltage according to the first direct current bus voltage and the second direct current bus voltage.
By adopting the method for controlling the compressor, which is provided by the embodiment of the disclosure, as the phase voltage peak value of the compressor cannot be directly detected, the direct axis voltage and the quadrature axis voltage of the compressor are determined through the direct axis current and the quadrature axis current of the compressor, and then the phase voltage peak value of the compressor is determined. Because the determination of the phase voltage peak value is based on the direct-axis current and the quadrature-axis current, the accuracy of the phase voltage peak value is high, and the target direct-current bus voltage is easy to reach the target value so as to improve the utilization rate of the direct-current bus voltage.
For the air conditioner in step S211 to obtain the direct-axis current and the quadrature-axis current of the compressor, to obtain the direct-axis (d-axis) current through the weak magnetic loop, the quadrature-axis (q-axis) current is obtained through the speed link and the maximum torque current ratio control (MTPA, maximum Torque Per Ampere).
And for the air conditioner in the step S212, determining the direct axis voltage and the quadrature axis voltage of the compressor according to the direct axis current and the quadrature axis current, and decoupling the direct axis current and the quadrature axis current for the air conditioner to obtain a direct axis voltage correction value and a quadrature axis voltage correction value. The air conditioner uses the sum of the output value of the direct-axis current after the control of the proportional integral (PI, proportion Integration) and the direct-axis voltage correction value as the direct-axis voltage, and uses the sum of the output value of the quadrature-axis current after the control of the proportional integral and the quadrature-axis voltage correction value as the quadrature-axis voltage.
The air conditioner in step S213 determines the phase voltage peak value of the compressor according to the direct axis voltage and the quadrature axis voltage, and determines the phase voltage peak value of the compressor as the square of the direct axis voltage and the quadrature axis voltage summed and then squared.
As shown in connection with fig. 5, an embodiment of the present disclosure provides another method for controlling a compressor, including:
s210, the air conditioner obtains a phase voltage peak value of the compressor.
S221, the air conditioner obtains the target utilization rate of the direct current bus voltage.
S222, the air conditioner determines the ratio of the phase voltage peak value to the target utilization rate of the direct current bus voltage as the first direct current bus voltage.
S230, the air conditioner obtains alternating current input voltage.
S240, the air conditioner determines a second direct current bus voltage according to the alternating current input voltage.
S250, the air conditioner determines a target direct current bus voltage according to the first direct current bus voltage and the second direct current bus voltage.
By adopting the method for controlling the compressor provided by the embodiment of the disclosure, the target utilization rate of the DC bus voltage is obtained and is used as the expected utilization rate of the DC bus voltage. And determining the ratio of the phase voltage peak value to the target utilization rate of the direct current bus voltage as the first direct current bus voltage, so that the target direct current bus voltage to be determined reaches the target value. The heavier the compressor is, the greater the phase voltage peak, and the greater the first dc bus voltage. The lighter the compressor load, the smaller the phase voltage peak, and the smaller the first dc bus voltage. The target direct current bus voltage to be determined is determined according to the target utilization rate of the direct current bus voltage, the first direct current bus voltage changes along with the load of the compressor and can reach the target value, and the utilization rate of the direct current bus voltage is improved.
Optionally, the target utilization of the dc bus voltage in steps S221 and S222 is a desired ratio of the phase voltage peak of the compressor to the dc bus voltage. The higher the target utilization setting of the dc bus voltage, the higher the actual utilization of the dc bus voltage, and the higher the upper frequency limit of compressor operation. The air conditioner in step S221 obtains the target utilization rate of the dc bus voltage, and determines different target utilization rates of the dc bus voltage for the air conditioner according to different modulation areas. For space voltage vector modulation (SVPWM, space Vector Pulse Width Modulation), the maximum target dc bus voltage utilization is typically 0.577 in the linear modulation region. In the overmodulation region, the maximum target utilization of the dc bus voltage is typically 0.625. For the modulation region, the phase voltage peak of the compressor and the dc bus voltage can be determined. Therefore, by selecting different target utilization rates of the direct current bus voltage in different modulation areas, the direct current bus voltage can meet the requirements of the compressor under different operation conditions, the loss of devices of the booster circuit is reduced, and meanwhile, the utilization rate of the direct current bus voltage is improved.
As shown in connection with fig. 6, an embodiment of the present disclosure provides another method for controlling a compressor, including:
s210, the air conditioner obtains a phase voltage peak value of the compressor.
S220, the air conditioner determines a first direct current bus voltage according to the phase voltage peak value.
S230, the air conditioner obtains alternating current input voltage.
S241, the air conditioner determines an average value of the alternating current input voltage according to the alternating current input voltage.
S242, the air conditioner determines an alternating input voltage peak value according to the alternating input voltage average value.
S243, the air conditioner determines a second direct current bus voltage according to the alternating current input voltage peak value.
S250, the air conditioner determines a target direct current bus voltage according to the first direct current bus voltage and the second direct current bus voltage.
By adopting the method for controlling the compressor provided by the embodiment of the disclosure, the average value of the alternating current input voltage is determined according to the alternating current input voltage, and then the peak value of the alternating current input voltage is determined. And determining a second direct current bus voltage as a target direct current bus voltage to be determined according to the alternating current input voltage peak value. Since the determination of the second dc bus voltage is dependent on the ac input voltage, when the ac input voltage changes, the second dc bus voltage can be changed accordingly. Because the second direct current bus voltage changes along with the alternating current input voltage, the phenomenon that the direct current bus voltage cannot reach the target value to influence the operation of the compressor is avoided, and meanwhile, the utilization rate of the direct current bus voltage is improved.
The ac input voltage is obtained for the air conditioner in step S230, and the ac input voltage sampling value is obtained for sampling the ac input voltage of the rectifying circuit.
Optionally, the air conditioner in step S241 determines an average ac input voltage according to the ac input voltage, including: the air conditioner is used for determining an average value of the alternating current input voltage through integral average operation after the alternating current input voltage sampling value is subjected to low-pass filtering. Or, the air conditioner detects the ac input voltage peak value in each cycle a plurality of times. The air conditioner carries out low-pass filtering on a plurality of alternating current input voltage peaks, and then determines an alternating current input voltage average value through operation. Thus, the sampling value or peak value of the alternating current input voltage is subjected to low-pass filtering, so that the determined voltage average value is more stable, and temporary fluctuation is reduced. Because the low-pass filtering is carried out on a plurality of alternating current input voltage peaks, the accuracy of determining the average value of the alternating current input voltage is improved, and therefore the utilization rate of the direct current bus voltage is improved.
The air conditioner in step S242 determines an ac input voltage peak value according to the ac input voltage average value, which is the product of the ac input voltage average value and the conversion coefficient, and determines the ac input voltage peak value. The conversion coefficient is typically 1.57.
Optionally, the determining, by the air conditioner in step S243, the second dc bus voltage according to the ac input voltage peak value includes: the air conditioner obtains a boost coefficient. The air conditioner determines the product of the alternating current input voltage peak value and the boost coefficient as the second direct current bus voltage. The value range of the boost coefficient is [1.1,2.1]. Preferably, the boost factor takes a value of 1.3, 1.6 or 1.9. In this way, the second dc bus voltage can be calculated from the ac input voltage peak value and the boost coefficient. The second direct current bus voltage changes along with the alternating current input voltage peak value, so that the influence of the too low direct current bus voltage on the operation of the compressor is avoided. When the boost coefficient is in the value range, the output voltage of the boost circuit is stable, and the boost circuit can be ensured to be in a full modulation state, so that the engine can reliably run.
Alternatively, the boost coefficient may also be determined by: the air conditioner obtains the current weak magnetic current of the compressor. The air conditioner determines a current difference value between the current weak magnetic current and the target weak magnetic current. The air conditioner takes the output value of the current difference value after proportional integral control as a boost coefficient correction value. The air conditioner determines the sum of the boost coefficient basic value and the boost coefficient correction value as the boost coefficient. The basic value of the boosting coefficient is a preset value. For example, the boost coefficient base value may be 1.1. In this way, the boost coefficient is determined according to the current weak magnetic current of the compressor, and when the alternating current input voltage and the weak magnetic current of the compressor change, the second direct current bus voltage can change correspondingly. Because the second direct current bus voltage changes along with the alternating current input voltage and the weak current, the phenomenon that the operation of the compressor is influenced by the fact that the direct current bus voltage cannot reach the target value is avoided, and meanwhile the utilization rate of the direct current bus voltage is improved.
As shown in connection with fig. 7, an embodiment of the present disclosure provides another method for controlling a compressor, including:
s210, the air conditioner obtains a phase voltage peak value of the compressor.
S220, the air conditioner determines a first direct current bus voltage according to the phase voltage peak value.
S230, the air conditioner obtains alternating current input voltage.
S240, the air conditioner determines a second direct current bus voltage according to the alternating current input voltage.
S251, the air conditioner determines a relationship between the first dc bus voltage and the second dc bus voltage.
S252, in the case where the first dc bus voltage is smaller than the second dc bus voltage, the air conditioner determines that the target dc bus voltage is the second dc bus voltage, and performs step S254.
S253, in the case where the first dc bus voltage is greater than or equal to the second dc bus voltage, the air conditioner determines the target dc bus voltage as the first dc bus voltage.
S254, the air conditioner determines the relation between the target direct current bus voltage and the direct current bus voltage limit value.
S255, in the case where the target dc bus voltage is greater than the dc bus voltage limit value, the air conditioner adjusts the target dc bus voltage to the dc bus voltage limit value, and performs step S260.
S256, when the target direct current bus voltage is smaller than or equal to the limit value of the direct current bus voltage, the air conditioner keeps the target direct current bus voltage unchanged.
S260, the air conditioner controls the booster circuit according to the target direct current bus voltage.
By adopting the method for controlling the compressor provided by the embodiment of the disclosure, after two undetermined target direct current bus voltages, namely the first direct current bus voltage and the second direct current bus voltage, are determined, the optimal direct current bus voltage is selected in a comparison mode. In the comparison process, the minimum value of the target direct current bus voltage is limited to the second direct current bus voltage, so that the influence of the too low direct current bus voltage on the normal operation of the compressor is prevented. Under the condition that normal operation of the compressor is met, the target direct current bus voltage is selected to be the first direct current bus voltage, so that the utilization rate of the direct current bus voltage is improved. Under the condition that the target direct current bus voltage is too high, limiting the target direct current bus voltage within the limit value of the direct current bus voltage, and avoiding damaging devices in the booster circuit and the inverter circuit. By limiting the target direct current bus voltage between the second direct current bus voltage and the limit value of the direct current bus voltage, the normal operation of the compressor is ensured, meanwhile, the damage of circuit devices is prevented, and the utilization rate of the direct current bus voltage is improved. For example, if the ac input voltage peak value is 170V and the boost coefficient is 2.1, the second dc bus voltage is 357V. If the target dc bus voltage is 380V, it cannot be achieved only by the second dc bus voltage. And when the first dc bus voltage (e.g., 375V) is greater than or equal to the second dc bus voltage after the first dc bus voltage is added, the target dc bus voltage is the first dc bus voltage. That is, the target dc bus voltage is 375V, greater than 357V, closer to the target dc bus voltage 380V.
The limit value of the direct current bus voltage in steps S254 to S256 is determined according to the maximum withstand voltage value of the device. For example, if the maximum withstand voltage of the voltage stabilizing capacitor between the voltage boosting circuit and the inverter circuit is 450V, the target dc bus voltage is necessarily less than 450V. In consideration of ac input voltage fluctuation and error, a certain margin is set, and the dc bus voltage limit value may be set to 450v×0.85=382.5V.
As shown in connection with fig. 8, an embodiment of the present disclosure provides an apparatus for controlling a compressor, including a processor (processor) 41 and a memory (memory) 42. Optionally, the apparatus may also include a communication interface (Communication Interface) 43 and a bus 44. The processor 41, the communication interface 43 and the memory 42 may communicate with each other via a bus 44. The communication interface 43 may be used for information transmission. The processor 41 may call logic instructions in the memory 42 to perform the method for controlling the compressor of the above-described embodiment.
Further, the logic instructions in the memory 42 described above may be implemented in the form of software functional units and stored in a computer readable storage medium when sold or used as a stand alone product.
The memory 42 serves as a storage medium for storing a software program, a computer executable program, and program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 41 executes functional applications and data processing by running program instructions/modules stored in the memory 42, i.e. implements the method for controlling the compressor in the above-described embodiments.
Memory 42 may include a storage program area that may store an operating system, at least one application program required for functionality, and a storage data area; the storage data area may store data created according to the use of the terminal device, etc. In addition, memory 42 may include high-speed random access memory, and may also include non-volatile memory.
The embodiment of the disclosure provides an air conditioner, which comprises the device for controlling a compressor.
The disclosed embodiments provide a storage medium storing computer executable instructions configured to perform the above-described method for controlling a compressor.
The storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of 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, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this disclosure is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in the present disclosure, the terms "comprises," "comprising," and/or variations thereof, mean that the recited features, integers, steps, operations, elements, and/or components are present, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A method for controlling a compressor, a driving circuit of the compressor comprising: a rectifying circuit for rectifying an ac input voltage; the input side of the boosting circuit is connected with the rectifying circuit, and the output side of the boosting circuit is connected with the direct current bus and is used for boosting the output voltage of the rectifying circuit; characterized in that the method comprises:
obtaining a phase voltage peak value of the compressor;
determining a first direct current bus voltage according to the phase voltage peak value;
obtaining an alternating current input voltage;
determining a second direct current bus voltage according to the alternating current input voltage;
and determining the target direct current bus voltage according to the first direct current bus voltage and the second direct current bus voltage.
2. The method of claim 1, wherein determining the target dc bus voltage from the first dc bus voltage and the second dc bus voltage comprises:
determining a relationship between a first dc bus voltage and a second dc bus voltage;
under the condition that the first direct current bus voltage is smaller than the second direct current bus voltage, determining that the target direct current bus voltage is the second direct current bus voltage;
and determining the target direct current bus voltage as the first direct current bus voltage under the condition that the first direct current bus voltage is larger than or equal to the second direct current bus voltage.
3. The method of claim 2, wherein determining the target dc bus voltage based on the first dc bus voltage and the second dc bus voltage further comprises:
determining the relation between the target direct current bus voltage and the limit value of the direct current bus voltage;
under the condition that the target direct current bus voltage is larger than the direct current bus voltage limiting value, the target direct current bus voltage is adjusted to the direct current bus voltage limiting value;
and under the condition that the target direct current bus voltage is smaller than or equal to the limit value of the direct current bus voltage, keeping the target direct current bus voltage unchanged.
4. The method of claim 1, wherein determining the first dc bus voltage based on the phase voltage peak value comprises:
obtaining a target utilization rate of the direct current bus voltage;
and determining the ratio of the peak value of the phase voltage to the target utilization rate of the direct current bus voltage as the first direct current bus voltage.
5. The method of claim 1, wherein determining the second dc bus voltage based on the ac input voltage comprises:
determining an average value of the alternating current input voltage according to the alternating current input voltage;
determining an alternating current input voltage peak value according to the alternating current input voltage average value;
and determining the second direct current bus voltage according to the alternating current input voltage peak value.
6. The method of claim 5, wherein determining the second dc bus voltage based on the ac input voltage peak value comprises:
obtaining a boosting coefficient;
and determining the product of the alternating current input voltage peak value and the boost coefficient as a second direct current bus voltage.
7. The method according to any one of claims 1 to 6, wherein obtaining a phase voltage peak of the compressor comprises:
obtaining direct axis current and quadrature axis current of the compressor;
determining the direct-axis voltage and the quadrature-axis voltage of the compressor according to the direct-axis current and the quadrature-axis current;
and determining the phase voltage peak value of the compressor according to the direct axis voltage and the quadrature axis voltage.
8. An apparatus for controlling a compressor comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for controlling a compressor according to any one of claims 1 to 7 when the program instructions are run.
9. An air conditioner, comprising:
a compressor (11);
a driving circuit (12) connected to the compressor (11) for outputting a driving signal to the compressor (11); and, a step of, in the first embodiment,
the apparatus for controlling a compressor of claim 8;
wherein the drive circuit (12) comprises:
a rectifying circuit (121) for rectifying an ac input voltage;
the boosting circuit (122) is connected with the rectifying circuit (121) at the input side, and is connected with the direct current bus at the output side, and is used for boosting the output voltage of the rectifying circuit (121);
and an inverter circuit (123) having an input side connected to the DC bus and an output side connected to the compressor (11).
10. A storage medium storing program instructions which, when executed, perform the method for controlling a compressor of any one of claims 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210427730.4A CN116972520A (en) | 2022-04-22 | 2022-04-22 | Method and device for controlling compressor, air conditioner and storage medium |
| PCT/CN2022/133624 WO2023202072A1 (en) | 2022-04-22 | 2022-11-23 | Method and apparatus for controlling compressor, and air conditioner and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210427730.4A CN116972520A (en) | 2022-04-22 | 2022-04-22 | Method and device for controlling compressor, air conditioner and storage medium |
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| Publication Number | Publication Date |
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| CN116972520A true CN116972520A (en) | 2023-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210427730.4A Pending CN116972520A (en) | 2022-04-22 | 2022-04-22 | Method and device for controlling compressor, air conditioner and storage medium |
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| Country | Link |
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| CN (1) | CN116972520A (en) |
| WO (1) | WO2023202072A1 (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104848476B (en) * | 2015-04-28 | 2018-08-17 | 广东美的制冷设备有限公司 | The given acquisition methods of the DC bus-bar voltage of air-conditioning system, device |
| CN105610368A (en) * | 2016-01-14 | 2016-05-25 | 广东美芝制冷设备有限公司 | Weak magnetic control method and device of compressor and compressor control system |
| CN107707165B (en) * | 2017-09-30 | 2020-08-14 | 广东美的制冷设备有限公司 | Control method of compressor, compressor system and refrigeration equipment |
| CN108809073B (en) * | 2018-05-31 | 2020-01-17 | 奥克斯空调股份有限公司 | APFC circuit voltage control method and system and air conditioner |
| CN110855157B (en) * | 2019-12-02 | 2020-11-10 | 四川航电微能源有限公司 | Airplane ground static variable power supply direct-current bus control method based on active rectification |
| CN111628660B (en) * | 2020-06-05 | 2021-08-27 | 浙江鲲悟科技有限公司 | Compressor variable frequency speed regulating system and control method of direct current bus voltage |
| CN111628659A (en) * | 2020-06-05 | 2020-09-04 | 浙江鲲悟科技有限公司 | Compressor variable frequency speed regulating system and control method of direct current bus voltage |
| CN112524854B (en) * | 2020-12-09 | 2022-09-06 | 青岛海尔空调器有限总公司 | Control method of compressor in variable frequency air conditioner and variable frequency air conditioner |
| CN114322227B (en) * | 2021-12-30 | 2023-09-15 | 海信空调有限公司 | Control method and device of compressor, household appliance and storage medium |
-
2022
- 2022-04-22 CN CN202210427730.4A patent/CN116972520A/en active Pending
- 2022-11-23 WO PCT/CN2022/133624 patent/WO2023202072A1/en unknown
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| WO2023202072A1 (en) | 2023-10-26 |
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