CN114337437A - Control method of variable frequency air conditioner, variable frequency air conditioner and computer storage medium - Google Patents
Control method of variable frequency air conditioner, variable frequency air conditioner and computer storage medium Download PDFInfo
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Abstract
The invention discloses a control method of a variable frequency air conditioner, the variable frequency air conditioner and a computer storage medium, wherein the control method of the variable frequency air conditioner comprises the following steps: obtaining a duty ratio compensation value according to the obtained running current value of the compressor, and obtaining a control parameter compensation value of the compressor according to the obtained input alternating voltage value, the actual current value of the PFC circuit and the rotating speed value of the compressor; obtaining a target duty ratio according to the voltage value of the direct current bus, the actual current value of the PFC circuit, the input alternating current voltage value and the duty ratio compensation value; obtaining a target control parameter of the compressor according to the control parameter compensation value of the compressor, the rotating speed value of the compressor, the rotor electrical angle position value and the three-phase current value of the compressor; and controlling the PFC circuit according to the target duty ratio, and controlling the compressor according to the target control parameter of the compressor. By adopting the control method, the purpose of inhibiting the fluctuation of the voltage of the direct current bus can be realized, and the use reliability is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method of a variable frequency air conditioner, the variable frequency air conditioner and a computer storage medium.
Background
In the related art, for an inverter air conditioner, an input end of an inverter controller is usually single-phase alternating current, a compressor load at an output end is a periodically fluctuating load, and both the input end and the compressor load can cause a direct current bus voltage value of the inverter controller to fluctuate, so that the service life of a bus capacitor is reduced, and the reliability is reduced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a control method for an inverter air conditioner, which can suppress the fluctuation of the dc bus voltage and improve the reliability of use.
The second objective of the present invention is to provide an air conditioner.
It is a further object of the present invention to provide a computer storage medium.
The fourth objective of the present invention is to provide an air conditioner.
In order to solve the above problem, an embodiment of a first aspect of the present invention provides a control method for an inverter air conditioner, where the inverter air conditioner includes a PFC circuit and a compressor, and the control method includes: acquiring a direct current bus voltage value, an actual current value of a PFC circuit, an input alternating current voltage value, an operation current value of a compressor, a rotating speed value of the compressor, a rotor electrical angle position value and a three-phase current value of the compressor; obtaining a duty ratio compensation value according to the running current value of the compressor, and obtaining a control parameter compensation value of the compressor according to the input alternating current voltage value, the actual current value of the PFC circuit and the rotating speed value of the compressor; obtaining a target duty ratio according to the direct current bus voltage value, the actual current value of the PFC circuit, the input alternating current voltage value and the duty ratio compensation value; obtaining a target control parameter of the compressor according to a control parameter compensation value of the compressor, a rotating speed value of the compressor, an electric angle position value of the rotor and a three-phase current value of the compressor; and controlling the PFC circuit according to the target duty ratio, and controlling the compressor according to a target control parameter of the compressor.
According to the control method of the inverter air conditioner of the embodiment of the invention, because the DC bus voltage is simultaneously influenced by the input of the power grid side and the output of the inverter side, the influence of the fluctuation of the load of the compressor is considered, the duty ratio compensation value is obtained through the running current value of the compressor, the target duty ratio is obtained according to the duty ratio compensation value, the DC bus voltage value, the actual current value of the PFC circuit and the input AC voltage value, when the PFC circuit is controlled, the duty ratio of the PFC circuit is compensated through the duty ratio compensation value to obtain the target duty ratio, so that when the PFC circuit is controlled according to the target duty ratio, the PFC circuit can output the stable DC bus voltage value, the fluctuation of the DC bus voltage caused by the fluctuation of the load of the compressor is effectively inhibited, meanwhile, the influence of the fluctuation of the power grid frequency of the power grid side is considered, the control parameter compensation value of the compressor is obtained through the input AC voltage value, the actual current value of the PFC circuit and the rotating speed value of the compressor, and the target control parameter of the compressor is obtained through the control parameter compensation value, the rotating speed value of the compressor, the rotor electrical angle position value and the three-phase current value, namely, the control parameter compensation value is taken as the fluctuation quantity generated by the power grid side, and the control parameter compensation value is compensated into the target control parameter of the inverter side compressor, so that the corresponding power grid frequency fluctuation exists in the inverter side output quantity and the power grid side input quantity, the fluctuation of the direct current bus voltage caused by the fluctuation of the power grid frequency is effectively inhibited, and the use reliability is improved.
In some embodiments, obtaining the duty compensation value according to the operating current value of the compressor includes: acquiring a duty ratio compensation coefficient; calculating a product of the operating current value of the compressor and the duty compensation coefficient as the duty compensation value.
In some embodiments, obtaining a target duty cycle from the dc bus voltage value, the actual current value of the PFC circuit, the input ac voltage value, and the duty cycle compensation value includes: obtaining an initial duty ratio according to the voltage value of the direct current bus, the actual current value of the PFC circuit and the input alternating current voltage value; calculating a sum of the initial duty ratio and the duty compensation value as the target duty ratio.
In some embodiments, obtaining the control parameter compensation value of the compressor according to the input ac voltage value, the actual current value of the PFC circuit, and the rotation speed value of the compressor includes: obtaining input power of the PFC circuit according to the input alternating voltage value and the actual current value of the PFC circuit; obtaining fluctuating power according to the input power of the PFC circuit; and obtaining a control parameter compensation value of the compressor according to the fluctuation power and the rotating speed value of the compressor.
In some embodiments, obtaining the control parameter compensation value of the compressor according to the fluctuating power and the rotation speed value of the compressor comprises: calculating a product value of the fluctuation power and the reciprocal of the rotating speed value of the compressor to obtain an electromagnetic torque compensation value, and taking the electromagnetic torque compensation value as a control parameter compensation value of the compressor; or calculating a product value of the fluctuation power and the reciprocal of the rotating speed value of the compressor to obtain an electromagnetic torque compensation value, further obtaining a q-axis current compensation value according to the electromagnetic torque compensation value and a torque coefficient of the compressor, and taking the q-axis current compensation value as a control parameter compensation value of the compressor; or calculating a product value of the fluctuation power and the reciprocal of the rotating speed value of the compressor to obtain an electromagnetic torque compensation value, further obtaining an initial q-axis current compensation value according to the electromagnetic torque compensation value and a torque coefficient of the compressor, calculating a product value of the initial q-axis current compensation value and a current compensation coefficient to obtain a target q-axis current compensation value, and taking the target q-axis current compensation value as a control parameter compensation value of the compressor, wherein the compensation coefficient is more than or equal to 0 and less than or equal to 1.
In some embodiments, the rotation speed value of the compressor includes a target rotation speed value of the compressor and an actual rotation speed value of the compressor, and the target control parameter of the compressor is obtained according to the control parameter compensation value of the compressor, the rotation speed value of the compressor, the rotor electrical angle position value, and the three-phase current value of the compressor, including: obtaining a target q-axis parameter to be compensated according to the target rotating speed value of the compressor and the actual rotating speed value of the compressor, wherein the target q-axis parameter to be compensated comprises a target q-axis current value to be compensated or a target electromagnetic torque value to be compensated; calculating the sum of the target q-axis parameter to be compensated and the control parameter compensation value of the compressor to obtain a compensated target q-axis parameter; and obtaining a target q-axis control parameter according to the compensated target q-axis parameter and the actual q-axis parameter.
In some embodiments, obtaining the target control parameter of the compressor according to the control parameter compensation value of the compressor, the rotation speed value of the compressor, the rotor electrical angle position value, and the three-phase current value of the compressor further comprises: obtaining the actual q-axis parameter and the actual d-axis parameter according to the rotor electrical angle position value and the three-phase current value of the compressor; and obtaining target d-axis control parameters according to the actual d-axis parameters and the target d-axis parameters.
An embodiment of a second aspect of the present invention provides an inverter air conditioner, including: at least one processor; a memory communicatively coupled to at least one of the processors; the storage is stored with a computer program executable by at least one processor, and the at least one processor implements the control method of the inverter air conditioner according to the above embodiment when executing the computer program.
According to the inverter air conditioner provided by the embodiment of the invention, the purpose of inhibiting the fluctuation of the direct current bus voltage can be realized by executing the control method of the inverter air conditioner provided by the embodiment through the processor, and the use reliability is improved.
An embodiment of a third aspect of the present invention provides a computer storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the control method of the inverter air conditioner described in the above embodiment.
An embodiment of a fourth aspect of the present invention provides an inverter air conditioner, including: the device comprises a rectification circuit, a PFC circuit, an inverter circuit and a compressor; the voltage acquisition unit is used for acquiring a direct current bus voltage value and an input alternating current voltage value; the current acquisition unit is used for acquiring the actual current value of the PFC circuit, the running current value of the compressor and the three-phase current value of the compressor; the rotating speed acquisition unit is used for acquiring an actual rotating speed value and a rotor electrical angle position value of the compressor; and the control module is used for executing the control method of the variable frequency air conditioner in the embodiment.
According to the inverter air conditioner provided by the embodiment of the invention, the control module executes the control method of the inverter air conditioner, so that the purpose of inhibiting the fluctuation of the voltage of the direct-current bus can be realized, and the use reliability is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a control method of an inverter air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an inverter air conditioner according to an embodiment of the present invention;
FIG. 3 is a block diagram of an inverter air conditioner according to an embodiment of the present invention;
fig. 4 is a block diagram of an inverter air conditioner according to another embodiment of the present invention.
Reference numerals:
a variable frequency air conditioner 10;
a rectifier circuit 1; a PFC circuit 2; an inverter circuit 3; a compressor 4; a voltage acquisition unit 5; a current collection unit 6; a rotating speed acquisition unit 7; a control module 8; a processor 11; a memory 12.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
Because a variable frequency controller in the variable frequency air conditioner usually adopts an AC-DC-AC structure, the input end of the variable frequency controller is single-phase AC, and the AC is rectified into DC through an active or passive PFC circuit, and the input power of the PFC circuit always contains fluctuation power of twice the frequency of a power grid; and the output end of the variable frequency controller is a compressor, and the load of the compressor is a periodic fluctuation load. Therefore, for the reasons, the direct-current bus voltage in the inverter air conditioner fluctuates due to the fluctuation of the alternating-current input end and the output end of the compressor, and the specific principle is as follows, so that the direct-current bus capacitor generates heat and is increased, the service life is reduced, and the service life and the reliability of the whole inverter controller are also influenced.
When the input of the power grid is single-phase alternating current and the PFC circuit is started, the input alternating current voltage value u of the power gridacAnd the actual current value i of the PFC circuitacEach can be expressed by the following formula.
Wherein, UacFor inputting an effective value of the AC voltage, IacFor inputting an effective value of AC current, omegasFor the frequency of the power grid,
is the current phase angle on the grid side.
The expression formula of the input power Pin of the unidirectional PFC circuit is as follows.
Wherein the content of the first and second substances,
in order to be a direct current component,
is an alternating current component.
As can be seen from the formula (3), when the power grid input is single-phase ac, the input power of the PFC circuit is always constant power plus the fluctuating power of twice the power grid frequency.
In addition, since the load of the compressor is a periodically fluctuating load, the electromagnetic torque and the rotational speed value of the compressor both include a fluctuation component, and the fluctuation component is approximately expressed as a sinusoidal fluctuation component, and the expression formula of the electromagnetic torque and the rotational speed value of the compressor is as follows.
Wherein, Te-compFor electromagnetic torque, TeBeing the direct current component of the electromagnetic torque, Δ TeBeing a fluctuating component of electromagnetic torque, ωcompIs the rotation speed value, omega is the direct current component of the rotation speed value, delta omega is the fluctuation component of the rotation speed value,
is the phase of the electromagnetic torque and,
is the phase of the rotation speed value.
The output power of the inverter-side compressor, that is, the output power of the PFC circuit, can be obtained from the above equations (4) and (5) as follows.
Without considering the influence of factors such as switching loss in the PFC circuit, the input power Pin of the PFC circuit is approximate to the input power of the dc bus capacitor, and the output power Pout of the PFC circuit is approximate to the output power of the dc bus capacitor, so the instantaneous power of the dc bus capacitor can be expressed as:
wherein C is the DC bus capacitance value udcThe dc bus voltage includes a dc component and a ripple component, and may be specifically expressed as:
udc＝Udc+ΔUdcformula (8)
Wherein, UdcIs the DC component of the DC bus voltage, Δ UdcIs the fluctuating component of the dc bus voltage.
And (3) integrating the equal sign two sides of the formula (7) at the same time to obtain an energy balance equation of the direct current bus. Considering the input energy, the output energy and the bus capacitance energy, the direct current component and the alternating current component of the bus capacitance energy are respectively equal, substituting the formula (3), the formula (6) and the formula (8) into the formula (7), and neglecting udcThe balance equation of the energy on the direct current bus can be obtained by using a high-order small term in the square is respectively as follows.
Dc component of energy on dc bus:
ac component of energy on dc bus:
based on equation (10), the single-phase ac input power causes dc bus voltage fluctuations as in equation (11) below.
Wherein the content of the first and second substances,
is a power grid side fluctuation component,
a first, a second and a third wave component, respectively, on the compressor side.
Therefore, as can be seen from the above formula, the fluctuation components of the dc bus voltage include a grid-side fluctuation component and a compressor-side fluctuation component, respectively, that is, the dc bus voltage fluctuation is caused by the superposition of the grid-side energy fluctuation and the compressor-side energy fluctuation.
Further, under the condition that the compressor runs at a low frequency, in order to reduce the vibration of the system, torque compensation is added in the control of the compressor, and at the moment, due to the addition of the torque compensation, the filtering effect of the compressor on the load torque is weaker, and the power of the whole machine is lower, the fluctuation of the direct current bus voltage is mainly caused by the torque fluctuation of the compressor; under the condition of high-frequency operation of the compressor, the torque fluctuation of the compressor is small, the power of the whole compressor is large, namely the input power of the alternating current side of the variable-frequency controller is large, and the fluctuation of the direct-current bus voltage is mainly caused by the power grid side. Therefore, in general, the amplitude of the second fluctuation component of the compressor in the formula (11) is much larger than the amplitudes of the first fluctuation component and the third fluctuation component of the compressor, that is, the amplitudes of the first fluctuation component and the third fluctuation component of the compressor are much larger
Therefore, the dc bus voltage fluctuation can be approximately expressed as the following equation.
In the related art, the voltage of the direct current bus is controlled by a PFC circuit, for the control method of the variable frequency controller, the control of the PFC circuit on the rectifying side is completely decoupled from the control of the compressor on the inverting side, the response speed of the control of the PFC circuit is slow, and the voltage fluctuation of the direct current bus caused by twice the power grid frequency and the running frequency of the compressor cannot be inhibited.
In order to solve the above problem, an embodiment of the first aspect of the present invention provides a control method for an inverter air conditioner, which can achieve the purpose of suppressing fluctuation of a dc bus voltage and improve use reliability.
The control method of the inverter air conditioner according to the embodiment of the present invention is described below with reference to fig. 1, and as shown in fig. 1, the control method includes at least steps S1-S5. The inverter air conditioner comprises a PFC circuit and a compressor.
And step S1, acquiring the voltage value of the direct current bus, the actual current value of the PFC circuit, the input alternating current voltage value, the running current value of the compressor, the rotating speed value of the compressor, the rotor electrical angle position value and the three-phase current value of the compressor.
Specifically, referring to fig. 2, the voltage across the dc bus capacitor is the dc bus voltage udcThe actual current value of the PFC circuit is the AC current value i at the input side of the PFC circuit 2acInput AC voltage value of uacAnd the rotating speed value of the compressor comprises a target rotating speed value omega and an actual rotating speed value omega of the compressor, a rotor electrical angle position value theta, and three-phase current values ia, ib and ic of the compressor respectively.
Furthermore, it is considered that in the existing PFC control method, the control process is completely decoupled from the compressor, i.e. the input of the PFC circuit control module 14 only has the dc bus voltage value udcThe actual current value of the PFC circuit is iacAnd an input AC voltage value of uacAnd does not contain compressor related variables; the input of the compressor control module 13 is only the running current value of the compressor, the rotating speed value of the compressor, the rotor electrical angle position value and the three-phase current value of the compressor, and does not contain related variables controlled by the PFC circuit, therefore, PFor this reason, in the embodiment of the present invention, the PFC circuit control is mutually coupled with the compressor control, so that when the PFC circuit is controlled, the operating current value i of the compressor is directly introduced, and the change of the compressor load is directly reflected by the operating current value i of the compressor, thereby facilitating the PFC circuit control module 14 to respond in time according to the operating current value i of the compressor when the load of the compressor fluctuates, so as to suppress the fluctuation of the dc bus voltage caused by the fluctuation of the compressor load, and introduce the input ac voltage value u in the control of the compressoracAnd the actual current value i of the PFC circuitacSo as to suppress fluctuations in the dc bus voltage due to grid-side grid frequency fluctuations by controlling the compressor.
And step S2, obtaining a duty ratio compensation value according to the running current value of the compressor, and obtaining a control parameter compensation value of the compressor according to the input alternating current voltage value, the actual current value of the PFC circuit and the rotating speed value of the compressor.
In order to reduce the fluctuation of the direct current bus voltage, the basic idea of the method of the embodiment of the invention is that the fluctuation component of the direct current bus voltage caused by the fluctuation of the compressor load is used as a compensation quantity to be compensated into the duty ratio of the PFC circuit when the PFC circuit is controlled, so that the PFC circuit can output a stable direct current bus voltage value, the fluctuation of the direct current bus voltage caused by the fluctuation of the compressor load is effectively inhibited, meanwhile, the input power of the compressor at the inversion side is compensated with corresponding fluctuation power when the compressor at the inversion side is controlled, the corresponding power grid frequency fluctuation exists at both sides of the direct current bus capacitor, the power at both sides of the direct current bus capacitor is consistent, and the fluctuation of the direct current bus voltage caused by the power grid frequency fluctuation at the power grid side is effectively inhibited, the use reliability is improved.
Specifically, the DC bus voltage value is simultaneously input from the power grid side and output from the inverter side (i.e. compressor)When the running current value of the compressor is increased, in order to meet the energy requirement of the compressor, the energy required to be output by the direct current bus is increased, but the response speed of the PFC circuit control module is very slow, so that the energy input at the alternating current side in a short time cannot balance the energy output by the compressor, and at the moment, the energy in the direct current bus capacitor is reduced, so that the voltage of the direct current bus is reduced; otherwise, the dc bus voltage rises. Furthermore, due to the input voltage u of the PFC circuitiAnd the DC bus voltage value udcThe relationship between (i.e., the output voltage value of the PFC circuit) and the duty ratio d satisfies the following equation.
From the above formula, when the input voltage u of the PFC circuit is obtainediKeep stable, DC bus voltage value udcWhen the load of the compressor changes, the DC bus voltage value u is setdcThe recovery is fast, and the duty ratio d needs to be adjusted quickly, but in the existing PFC control method, when the voltage value u of the direct current bus is equal todcWhen the load fluctuation of the compressor causes large fluctuation of the direct current bus voltage, the duty ratio d needs to be adjusted through a voltage control loop and a current control loop, the response speed is slow, and the response speed of the compressor load fluctuation cannot be met.
Therefore, in order to solve the above problems, the embodiment of the invention directly introduces the operating current value i of the compressor when controlling the PFC circuit, can directly reflect the change of the compressor load based on the operating current value i of the compressor, the duty compensation value d1 is obtained from the operating current value i of the compressor, i.e. the fluctuation of the dc bus voltage caused by the fluctuation of the compressor load is used as a compensation amount of one duty, moreover, the operating current value i of the compressor does not need to pass through a voltage control loop and a current control loop, the PFC circuit control module can directly obtain a duty ratio compensation value d1 from the operating current value i of the compressor, so that the response speed of the load change of the compressor is met, and further, when the PFC circuit control module controls the duty ratio of the PFC circuit, the duty ratio compensation value d1 is compensated into the duty ratio of the PFC circuit, so that the aim of effectively inhibiting the voltage fluctuation of the direct-current bus caused by the load fluctuation of the compressor is fulfilled.
In some embodiments, the operating current value i of the compressor is a current variable that can directly reflect the change of the compressor load, for example, as shown in fig. 2, it may include any one of a Q-axis target current value iq, a Q-axis actual current value iq, a target current vector value is, and an actual current vector value is of the compressor, i.e., i ═ iq ═ or i ═ iq or i ═ is, so that when compensating the duty ratio of the PFC circuit, the duty ratio compensation amount d1 may be linearly changed according to the current variable, thereby effectively suppressing the fluctuation of the dc bus voltage caused by the fluctuation of the compressor load.
The target current vector value is and the actual current vector value is may be calculated by the following equations.
And id is the D-axis target current value, iq is the Q-axis target current value, id is the D-axis actual current value, and iq is the Q-axis actual current value.
And, because the dc bus voltage is controlled by the PFC circuit, and the control parameter of the compressor is implemented when controlling the compressor, such as the running current or the electromagnetic torque of the compressor, instead of directly controlling the input power of the compressor, the embodiment of the present invention couples the PFC circuit control with the compressor control, that is, the obtained input ac voltage value u of the PFC circuit is used to obtain the input ac voltage value u of the PFC circuit, in order to reduce the fluctuation of the dc bus voltage and to compensate the input power of the compressoracAnd the actual current value i of the PFC circuitacAnd the reference quantity of the compensation of the inverter side compressor, namely the compensation of the control parameter of the compressor is obtained by combining the rotating speed value of the compressorThe value is obtained, so that the control parameter compensation value of the compressor is compensated into the control parameter of the compressor on the inversion side, the input power of the compressor, namely the output power on the inversion side, also compensates the corresponding power grid frequency fluctuation power, and is consistent with the input power on the power grid side, so that for the fluctuation of the direct current bus voltage, the input power of the compressor, namely the power grid frequency fluctuation power compensated by the output power on the inversion side, just offsets the fluctuation power of twice the power grid frequency on the input side of the power grid, the fluctuation of the direct current bus voltage is effectively inhibited, the service life of a bus capacitor is prolonged, and the overall use reliability is improved.
And step S3, obtaining a target duty ratio according to the direct current bus voltage value, the actual current value of the PFC circuit, the input alternating current voltage value and the duty ratio compensation value.
Specifically, as can be seen from the above, when the operating current value of the compressor increases, the dc bus voltage value u increasesdcDecreasing, and increasing the duty ratio d to recover; conversely, when the operating current value of the compressor is decreased, the duty ratio d needs to be decreased. Therefore, when the PFC circuit control module controls the duty ratio of the PFC circuit, the target duty ratio d is obtained through the direct current bus voltage value, the actual current value of the PFC circuit, the input alternating current voltage value and the duty ratio compensation value d1, namely, the target duty ratio d is obtained through the compensation of the duty ratio compensation value d1 into the duty ratio of the PFC circuit, so that when the PFC circuit control module controls the duty ratio of the PFC circuit, the direct current bus voltage fluctuation caused by the compressor load fluctuation is effectively inhibited.
And step S4, obtaining the target control parameter of the compressor according to the control parameter compensation value of the compressor, the rotating speed value of the compressor, the rotor electrical angle position value and the three-phase current value of the compressor.
Specifically, the initial control parameter of the compressor can be obtained through the rotating speed value of the compressor, the rotor electrical angle position value and the three-phase current value of the compressor, and then the initial control parameter of the compressor is compensated by the control parameter compensation value of the compressor to obtain the target control parameter of the compressor, so that when the compressor is controlled by the compensated target control parameter, the input power of the compressor, namely the output power of the inversion side, also compensates the corresponding grid frequency fluctuation power and is consistent with the input power of the grid side, therefore, for the fluctuation of the direct current bus voltage, the input power of the compressor, namely the grid frequency fluctuation power compensated by the output power of the inversion side, just offsets the fluctuation power of twice the grid frequency at the input side of the grid, thereby effectively inhibiting the fluctuation of the direct current bus voltage and prolonging the service life of the bus capacitor, the overall use reliability is improved.
And step S5, controlling the PFC circuit according to the target duty ratio and controlling the compressor according to the target control parameter of the compressor, so that the voltage fluctuation of the direct-current bus caused by the single-phase alternating-current input power and the compressor fluctuation load can be simultaneously inhibited in a mode of mutually coupling the PFC circuit control and the compressor control, and the service life of the bus capacitor and the reliability of the whole machine are effectively improved.
According to the control method of the inverter air conditioner of the embodiment of the invention, because the DC bus voltage is simultaneously influenced by the input of the power grid side and the output of the inverter side, the influence of the fluctuation of the load of the compressor is considered, the duty ratio compensation value is obtained through the running current value of the compressor, the target duty ratio is obtained according to the duty ratio compensation value, the DC bus voltage value, the actual current value of the PFC circuit and the input AC voltage value, when the PFC circuit is controlled, the duty ratio of the PFC circuit is compensated through the duty ratio compensation value to obtain the target duty ratio, so that when the PFC circuit is controlled according to the target duty ratio, the PFC circuit can stabilize the output DC bus voltage value, the fluctuation of the DC bus voltage caused by the fluctuation of the load of the compressor is effectively inhibited, meanwhile, the influence of the fluctuation of the power grid frequency of the power grid side is considered, the control parameter compensation value of the compressor is obtained through the input AC voltage value, the actual current value of the PFC circuit and the rotating speed value of the compressor, and the target control parameter of the compressor is obtained through the control parameter compensation value, the rotating speed value of the compressor, the rotor electrical angle position value and the three-phase current value, namely, the control parameter compensation value is taken as the fluctuation quantity generated by the power grid side, and the control parameter compensation value is compensated into the target control parameter of the inverter side compressor, so that the corresponding power grid frequency fluctuation exists in the inverter side output quantity and the power grid side input quantity, the fluctuation of the direct current bus voltage caused by the fluctuation of the power grid frequency is effectively inhibited, and the use reliability is improved.
In some embodiments, a duty cycle compensation factor is obtained, e.g., denoted as KPFCCalculating the operating current value i and duty ratio compensation coefficient K of the compressorPFCIs recorded as d1, i.e. d1 ═ K, for example, as a duty cycle compensation valuePFCAnd i, calculating the duty ratio compensation value d1, so that the duty ratio of the PFC circuit can be linearly changed along with the running current value i of the compressor, and the voltage fluctuation of the direct-current bus caused by the load fluctuation of the compressor is effectively inhibited. Wherein the duty ratio compensation coefficient KPFCThe duty ratio range of the PFC circuit and the operating current value range of the compressor may be determined according to the like, without being limited thereto. It will be appreciated that the compensation factor K is based on the duty cyclePFCThe calculated duty compensation amount d1 is required to ensure that the obtained target duty ratio d is within a reasonable range after the duty compensation of the PFC circuit.
In some embodiments, 0 ≦ target duty cycle d ≦ 1, and duty cycle compensation coefficient K is determined based on this rangePFCThe compensation quantity of the PFC duty ratio, namely the duty ratio compensation value d1, can be effectively ensured to be in a reasonable range.
In some embodiments, the DC bus voltage value u is based ondcActual current value i of PFC circuitacAnd an input AC voltage value uacObtaining an initial duty ratio di; the sum of the initial duty ratio di and the duty compensation value d1 is calculated as the target duty ratio d. Where the initial duty cycle di may be understood as the duty cycle calculated by the PFC circuit control module when the PFC circuit control is not coupled with the compressor control.
Specifically, referring to fig. 2, the target dc bus voltage value, i.e., u shown in fig. 2, is obtaineddcA first step of; according to the target DC bus voltage value udcVoltage value u of direct current busdcAnd an input AC voltage value | uacI, obtaining a target current value i of the PFC circuit through a voltage control loopacA first step of; according to the target current value iacSum of actual current values iacVia a current control loopObtaining an initial duty ratio di, wherein it can be understood that a control variable of a compressor is not introduced in the process of calculating the initial duty ratio di, so that when the load of the compressor fluctuates, the response speed of a PFC circuit control module is slow, and the response speed of the load change of the compressor cannot be met, so that the load fluctuation of the compressor can cause a large fluctuation of the dc bus voltage, and therefore, to solve the above problem, in the embodiment of the present invention, after calculating the initial duty ratio di, a control variable of the compressor, i.e., an operating current value i of the compressor is introduced, a duty compensation value d1 is obtained based on the control variable of the compressor, and then a sum of the initial duty ratio di and the duty compensation value d1 is calculated as a target duty ratio d, i.e., d + d1, so that when the compressor fluctuates, a duty compensation value d1 is obtained according to the fluctuation of the operating current value i of the compressor and compensated into the initial duty ratio di as a compensation amount, so as to offset the fluctuation of the DC bus voltage caused by the fluctuation of the compressor, thereby effectively inhibiting the fluctuation of the DC bus voltage caused by the fluctuation of the load of the compressor when the PFC circuit is controlled by the target duty ratio d.
In some embodiments, the value u is based on the input AC voltageacAnd the actual current value i of the PFC circuitacObtaining input power of a PFC circuit; obtaining fluctuating power according to input power of a PFC circuit; and obtaining a control parameter compensation value of the compressor according to the fluctuating power and the rotating speed value of the compressor.
Specifically, referring to fig. 2, an input ac voltage value u is calculatedacAnd the actual current value i of the PFC circuitacAs the input power Pin of the PFC circuit, i.e. Pin-uac*iacFurther, the input power Pin of the PFC circuit is passed through a high-pass filter or a band-pass filter to obtain the fluctuation power Pin-acThe fluctuating power Pin-acNamely the alternating current component of the input power at the power grid side, namely the fluctuation component of the alternating current input power of the PFC circuit, thereby obtaining the fluctuation power Pin-acAnd the rotating speed value of the compressor obtains a control parameter compensation value of the compressor so as to compensate the input power of the inverter-side compressor and reduce the fluctuation of the direct-current bus voltage.
In some embodiments, for the rootAccording to the fluctuation power Pin-acThe control parameter compensation value of the compressor obtained from the rotating speed value of the compressor is consistent with the target control parameter of the compressor, that is, if the control quantity of the compressor is electromagnetic torque, the target control parameter of the compressor is the electromagnetic torque, and the control parameter compensation value of the compressor obtained correspondingly is the electromagnetic torque; or, if the control quantity of the compressor is the operation current of the compressor, the target control parameter of the compressor is the operation current of the compressor, and the correspondingly obtained control parameter compensation value of the compressor is also the operation current of the compressor.
For example, the fluctuating power P may be calculatedin-acAnd the product value of the reciprocal of the rotating speed value of the compressor to obtain an electromagnetic torque compensation value delta Te, and taking the electromagnetic torque compensation value delta Te as a control parameter compensation value of the compressor. The rotation speed value of the compressor can be a target rotation speed value omega and an actual rotation speed value omega of the compressor, specifically, the control quantity of the compressor is electromagnetic torque, and therefore, the electromagnetic torque compensation value delta Te is calculated to be used as a control parameter compensation value of the compressor according to the fluctuation power Pin-acAnd the rotational speed value of the compressor is obtained as an electromagnetic torque compensation value
Or
Therefore, the electromagnetic torque compensation value delta Te is used as a control parameter compensation value of the compressor, and after the input power of the inverter-side compressor is compensated, the grid frequency fluctuation component in the AC input power of the PFC circuit can be effectively counteracted, and the purpose of inhibiting the fluctuation of the DC bus voltage is achieved.
Alternatively, the ripple power P can be calculatedin-acAnd the reciprocal of the compressor speed value to obtain an electromagnetic torque compensation value DeltaTe, and further, the electromagnetic torque compensation value DeltaTe and the compressor torque coefficient are expressed as KTAnd obtaining a q-axis current compensation value delta iq, and taking the q-axis current compensation value delta iq as a control parameter compensation value of the compressor. Specifically, referring to fig. 2, the control amount of the compressor is a q-axis current value, and thus by calculating a q-axis current compensation value Δ iq as a control parameter compensation value of the compressor, a compensation value Δ Te and a compressor torque coefficient K are calculated from an electromagnetic torque compensation value Δ TeTThe obtained q-axis current compensation value is
Or
Therefore, the q-axis current compensation value delta iq is used as a control parameter compensation value of the compressor, and after the input power of the inverter-side compressor is compensated, the grid frequency fluctuation component in the alternating current input power of the PFC circuit can be effectively counteracted, and the purpose of inhibiting the fluctuation of the direct current bus voltage is achieved.
Further, in practical applications, in order to achieve the best overall control effect by considering both the control performance of the compressor and the suppression effect of the voltage fluctuation of the dc bus, the embodiment of the present invention may further calculate the fluctuation power Pin-acAnd the reciprocal of the compressor rotation speed value to obtain an electromagnetic torque compensation value DeltaTe, and further based on the electromagnetic torque compensation value DeltaTe and the compressor torque coefficient KTObtaining an initial q-axis current compensation value delta iq0And calculating an initial q-axis current compensation value delta iq0Sum current compensation coefficient KcompThe target q-axis current compensation value delta iq is used as the compensation value of the control parameter of the compressor, that is, when the control quantity of the compressor, namely the q-axis current value, is compensated, the current compensation coefficient K is increasedcompTherefore, the size of the target q-axis current compensation value delta iq can be flexibly adjusted, and the overall optimal control effect is achieved.
Specifically, referring to FIG. 2, the initial q-axis current compensation value
Target q-axis current compensation value
Therefore, the target q-axis current compensation value delta iq serves as a control parameter compensation value of the compressor, and after the input power of the inverter-side compressor is compensated, the grid frequency fluctuation component in the alternating-current input power of the PFC circuit can be effectively offset, and the purpose of inhibiting the fluctuation of the direct-current bus voltage is achieved.
Wherein, the current compensation coefficient K is more than or equal to 0comp≤1。
In some embodiments, the rotation speed value of the compressor includes a target rotation speed value ω of the compressor and an actual rotation speed value ω of the compressor, and a target q-axis parameter to be compensated may be obtained according to the target rotation speed value ω of the compressor and the actual rotation speed value ω of the compressor, where the target q-axis parameter to be compensated includes a target q-axis current value to be compensated or a target electromagnetic torque value to be compensated; calculating a sum of a target q-axis parameter to be compensated and a control parameter compensation value of the compressor to obtain a compensated target q-axis parameter; and obtaining a target q-axis control parameter according to the compensated target q-axis parameter and the actual q-axis parameter.
For example, referring to fig. 2, iq1 is a target q-axis current value to be compensated, and the calculated q-axis current compensation value Δ iq or the target q-axis current compensation value Δ iq is used as a compensation value of a control parameter of the compressor, so that the compensated target q-axis parameter is the compensated target q-axis current value iq, that is, iq Δ iq + iq1, and the compensated target q-axis parameter iq and the actual q-axis parameter iq are used to obtain a target q-axis control parameter Uq, so as to compensate the input power of the inverter-side compressor and reduce the fluctuation of the dc bus voltage.
In some embodiments, referring to fig. 2, the actual q-axis parameter iq and the actual d-axis parameter id are obtained from the rotor electrical angle position value θ and the three-phase current values of the compressor, i.e., ia, ib, ic shown in fig. 2; and further, obtaining a target d-axis control parameter Ud according to the actual d-axis parameter id and the target d-axis parameter id, and accordingly, controlling the compressor by using the target q-axis control parameter and the target d-axis control parameter.
In summary, according to the control method of the inverter air conditioner of the embodiment of the invention, the compressor control and the PFC circuit control are coupled with each other, and the control parameters of the compressor, such as the q-axis current and the duty ratio of the PFC circuit, are compensated correspondingly, so that the voltage fluctuation of the direct-current bus caused by the single-phase alternating-current input power and the compressor fluctuation load can be inhibited at the same time, the service life of the electrolytic capacitor is effectively improved, and the reliability of the whole machine is improved.
According to the embodiment of the second aspect of the present invention, an inverter air conditioner 10 includes at least one processor 11 and a memory 12 communicatively connected to the at least one processor 11, as shown in fig. 3.
The memory 12 stores a computer program executable by the at least one processor 11, and the at least one processor 11 implements the control method of the inverter air conditioner provided in the above embodiment when executing the computer program.
It should be noted that a specific implementation manner of the inverter air conditioner 10 according to the embodiment of the present invention is similar to a specific implementation manner of the control method of the inverter air conditioner according to any of the above embodiments of the present invention, and please refer to the description of the method part specifically, and details are not described here again in order to reduce redundancy.
According to the inverter air conditioner 10 of the embodiment of the invention, the processor 11 executes the control method of the inverter air conditioner provided by the embodiment, so that the purpose of suppressing the fluctuation of the direct current bus voltage can be realized, and the use reliability is improved.
An embodiment of a third aspect of the present invention provides a computer storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the control method of the inverter air conditioner provided in the above embodiment.
In a fourth embodiment of the present invention, as shown in fig. 4, the inverter air conditioner 10 includes a rectification circuit 1, a PFC circuit 2, an inverter circuit 3, a compressor 4, a voltage acquisition unit 5, a current acquisition unit 6, a rotation speed acquisition unit 7, and a control module 8.
The voltage acquisition unit 5 is used for acquiring a direct current bus voltage value and an input alternating current voltage value; the current acquisition unit 6 is used for acquiring an actual current value of the PFC circuit 2, an actual current value of the PFC circuit, an operation current value of the compressor 4 and a three-phase current value of the compressor 4; the rotating speed acquisition unit 7 is used for acquiring an actual rotating speed value and a rotor electrical angle position value of the compressor 4; the control module 8 is used for executing the control method of the inverter air conditioner provided by the above embodiment.
Specifically, referring to fig. 2, the control module 8 includes a compressor control module 13 and a PFC circuit control module 14. The compressor control module 13 controls the operation of the compressor 4 according to the relevant variables of the compressor 4 and the introduced relevant variables controlled by the PFC circuit, wherein the relevant variables are respectively: target rotation speed value omega and actual rotation speed value omega of the compressor; a rotor electrical angle position value theta of the compressor; d axis target current value id and D axis actual current value id; a Q-axis target current value iq and a Q-axis actual current value iq; d axis target voltage value ud and Q axis target voltage value uq; the three-phase currents of the compressor are ia, ib and ic respectively; the input power of the PFC circuit is Pin; the fluctuating power, namely the alternating current component of the input power of the PFC circuit is Pin-ac; the electromagnetic torque compensation value is expected to be the fluctuating electromagnetic torque injected by the compressor, and is delta Te; the q-axis current compensation value is delta iq; the torque coefficient of the compressor is KTThe relation between the electromagnetic torque and the q-axis current value satisfies Te (KT) iq; kcompThe compensation coefficient of the compressor and the Q-axis current is a constant value and is used for adjusting the magnitude of a Q-axis current compensation value delta iq, and the value range of K is more than or equal to 0 and less than or equal to 1; HPF denotes a high pass filter; BPF denotes a band pass filter.
And, the PFC circuit control module 14 controls the dc bus voltage according to the relevant variables of the PFC circuit 2 and the introduced relevant variables of the compressor control, where the relevant variables are respectively: target DC bus voltage value udcAnd actual dc bus voltage value udc(ii) a Target current value i of PFC circuitacAnd the actual current value iac(ii) a Input AC voltage value uac(ii) a A target duty cycle d; an initial duty cycle di; compensation factor KPFC(ii) a The value of the operating current i of the compressor,there are four options, i ═ iq or i ═ is, respectively; the compensation amount of duty ratio is d1 ═ KPFCI. Therefore, when the control module 9 controls the PFC circuit 2 by using the control method of the inverter air conditioner provided in the above embodiment, the duty ratio of the PFC circuit 2 is the target duty ratio d ═ di + KPFCI. Therefore, the control module 9 can simultaneously suppress the voltage fluctuation of the direct-current bus caused by the single-phase alternating-current input power and the compressor fluctuation load by mutually coupling the PFC circuit control and the compressor control, and effectively improve the service life of the bus capacitor and the reliability of the whole machine.
It should be noted that a specific implementation manner of the inverter air conditioner 10 according to the embodiment of the present invention is similar to a specific implementation manner of the control method of the inverter air conditioner according to any of the above embodiments of the present invention, and please refer to the description of the method part specifically, and details are not described here again in order to reduce redundancy.
According to the air conditioner 10 of the embodiment of the invention, the control module 8 executes the control method of the inverter air conditioner provided by the embodiment, so that the purpose of inhibiting the fluctuation of the direct current bus voltage can be realized, and the use reliability is improved.
In the description of this specification, any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of custom logic functions or processes, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A control method of an inverter air conditioner is characterized in that the inverter air conditioner comprises a PFC circuit and a compressor, and the control method comprises the following steps:
acquiring a direct current bus voltage value, an actual current value of a PFC circuit, an input alternating current voltage value, an operation current value of a compressor, a rotating speed value of the compressor, a rotor electrical angle position value and a three-phase current value of the compressor;
obtaining a duty ratio compensation value according to the running current value of the compressor, and obtaining a control parameter compensation value of the compressor according to the input alternating current voltage value, the actual current value of the PFC circuit and the rotating speed value of the compressor;
obtaining a target duty ratio according to the direct current bus voltage value, the actual current value of the PFC circuit, the input alternating current voltage value and the duty ratio compensation value;
obtaining a target control parameter of the compressor according to a control parameter compensation value of the compressor, a rotating speed value of the compressor, an electric angle position value of the rotor and a three-phase current value of the compressor;
and controlling the PFC circuit according to the target duty ratio, and controlling the compressor according to a target control parameter of the compressor.
2. The method for controlling an inverter air conditioner according to claim 1, wherein obtaining a duty compensation value according to an operation current value of the compressor comprises:
acquiring a duty ratio compensation coefficient;
calculating a product of the operating current value of the compressor and the duty compensation coefficient as the duty compensation value.
3. The method for controlling the inverter air conditioner according to claim 1 or 2, wherein obtaining a target duty ratio according to the dc bus voltage value, the actual current value of the PFC circuit, the input ac voltage value, and the duty compensation value comprises:
obtaining an initial duty ratio according to the voltage value of the direct current bus, the actual current value of the PFC circuit and the input alternating current voltage value;
calculating a sum of the initial duty ratio and the duty compensation value as the target duty ratio.
4. The method for controlling an inverter air conditioner according to claim 1, wherein obtaining a control parameter compensation value of the compressor according to the input ac voltage value, the actual current value of the PFC circuit, and the rotation speed value of the compressor comprises:
obtaining input power of the PFC circuit according to the input alternating voltage value and the actual current value of the PFC circuit;
obtaining fluctuating power according to the input power of the PFC circuit;
and obtaining a control parameter compensation value of the compressor according to the fluctuation power and the rotating speed value of the compressor.
5. The method for controlling the inverter air conditioner according to claim 4, wherein obtaining the control parameter compensation value of the compressor according to the fluctuating power and the rotation speed value of the compressor comprises:
calculating a product value of the fluctuation power and the reciprocal of the rotating speed value of the compressor to obtain an electromagnetic torque compensation value, and taking the electromagnetic torque compensation value as a control parameter compensation value of the compressor;
or calculating a product value of the fluctuation power and the reciprocal of the rotating speed value of the compressor to obtain an electromagnetic torque compensation value, further obtaining a q-axis current compensation value according to the electromagnetic torque compensation value and a torque coefficient of the compressor, and taking the q-axis current compensation value as a control parameter compensation value of the compressor;
or calculating a product value of the fluctuation power and the reciprocal of the rotating speed value of the compressor to obtain an electromagnetic torque compensation value, further obtaining an initial q-axis current compensation value according to the electromagnetic torque compensation value and a torque coefficient of the compressor, calculating a product value of the initial q-axis current compensation value and a current compensation coefficient to obtain a target q-axis current compensation value, and taking the target q-axis current compensation value as a control parameter compensation value of the compressor, wherein the compensation coefficient is more than or equal to 0 and less than or equal to 1.
6. The method for controlling an inverter air conditioner according to claim 4 or 5, wherein the rotation speed value of the compressor includes a target rotation speed value of the compressor and an actual rotation speed value of the compressor, and the target control parameter of the compressor is obtained according to the control parameter compensation value of the compressor, the rotation speed value of the compressor, the rotor electrical angle position value and the three-phase current value of the compressor, and comprises:
obtaining a target q-axis parameter to be compensated according to the target rotating speed value of the compressor and the actual rotating speed value of the compressor, wherein the target q-axis parameter to be compensated comprises a target q-axis current value to be compensated or a target electromagnetic torque value to be compensated;
calculating the sum of the target q-axis parameter to be compensated and the control parameter compensation value of the compressor to obtain a compensated target q-axis parameter;
and obtaining a target q-axis control parameter according to the compensated target q-axis parameter and the actual q-axis parameter.
7. The method for controlling an inverter air conditioner according to claim 6, wherein a target control parameter of a compressor is obtained according to the control parameter compensation value of the compressor, the rotation speed value of the compressor, the rotor electrical angle position value, and the three-phase current value of the compressor, further comprising:
obtaining the actual q-axis parameter and the actual d-axis parameter according to the rotor electrical angle position value and the three-phase current value of the compressor;
and obtaining target d-axis control parameters according to the actual d-axis parameters and the target d-axis parameters.
8. An inverter air conditioner, comprising:
at least one processor;
a memory communicatively coupled to at least one of the processors;
wherein the memory stores a computer program executable by at least one processor, and the at least one processor implements the control method of the inverter air conditioner according to any one of claims 1 to 7 when executing the computer program.
9. A computer storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method of controlling an inverter air conditioner according to any one of claims 1 to 7.
10. An inverter air conditioner, comprising:
the device comprises a rectification circuit, a PFC circuit, an inverter circuit and a compressor;
the voltage acquisition unit is used for acquiring a direct current bus voltage value and an input alternating current voltage value;
the current acquisition unit is used for acquiring the actual current value of the PFC circuit, the running current value of the compressor and the three-phase current value of the compressor;
the rotating speed acquisition unit is used for acquiring an actual rotating speed value and a rotor electrical angle position value of the compressor;
a control module for performing the control method of the inverter air conditioner of any one of claims 1 to 7.
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