CN110410308A - Compressor control method, device and computer readable storage medium - Google Patents
Compressor control method, device and computer readable storage medium Download PDFInfo
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- CN110410308A CN110410308A CN201910601486.7A CN201910601486A CN110410308A CN 110410308 A CN110410308 A CN 110410308A CN 201910601486 A CN201910601486 A CN 201910601486A CN 110410308 A CN110410308 A CN 110410308A
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- current
- shaft voltage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a kind of compressor control methods, comprising: obtains the bus current of the compressor, the bus current includes three-phase current；It determines in three-phase current with the presence or absence of the target phase current greater than predetermined current；If there is the target phase current greater than predetermined current, the corresponding limitation voltage of the voltage vector for setting the compressor for the first predeterminated voltage in three-phase current；The compressor operation is controlled based on the limitation voltage, to reduce the running frequency of the compressor.The invention also discloses a kind of compressor control device and computer readable storage mediums.The present invention can realize the automatic frequency reducing of compressor before overcurrent occurs for compressor, and there is a situation where overcurrents due to having little time frequency reducing for compressor when preventing busbar voltage from declining.
Description
Technical field
The present invention relates to technical field of motors more particularly to a kind of compressor control method, device and computer-readable deposit
Storage media.
Background technique
Since the Network Voltage Stability of country variant and area differs greatly, especially some less developed countries and rural area
Area's grid stability is worse, and voltage ripple of power network speed quickly (fluctuation having is that Millisecond is even lower), may cause bus
The case where voltage instantaneous reduces, and is shut down frequent occurrence due to the unstable caused air-conditioning overcurrent of network voltage.
Currently, the voltage and current frequency limit logic progress frequency limit protection of air-conditioning main control chip is mainly relied on, but master control core
Piece is takeed a long time (including communication delay) to frequency limit instruction is issued from detecting voltage/current, when voltage decline abruptly
Main control chip often has little time to make frequency limit response or master control frequency limit response speed cause slowly very much frequency limit control can not in real time with
With the variation of voltage, at this point, being easy to that overcurrent occurs if compressor operation at higher frequencies.
If power network fluctuation number is more, the number that compressor overcurrent is shut down is also more, drops product reliability significantly
It is low, seriously affect properties of product and user experience.
Above content is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that above content is existing skill
Art.
Summary of the invention
The main purpose of the present invention is to provide a kind of compressor control method, device and computer readable storage medium,
Aim to solve the problem that the technical issues of existing cooler compressor operation is easy to happen overcurrent at higher frequencies.
To achieve the above object, the present invention provides a kind of compressor control method, the compressor control method include with
Lower step:
The bus current of the compressor is obtained, the bus current includes three-phase current；
It determines in three-phase current with the presence or absence of the target phase current greater than predetermined current；
If there is the target phase current greater than predetermined current in three-phase current, the pressure is set by the first predeterminated voltage
The corresponding limitation voltage of the voltage vector of contracting machine, wherein first predeterminated voltage is less than the vector modulation water of the compressor
Put down corresponding vector modulation voltage；
The compressor operation is controlled based on the limitation voltage, to reduce the running frequency of the compressor.
Further, described the step of controlling compressor operation based on the limitation voltage, includes:
First object D shaft voltage is determined based on three-phase current；
Based on the limitation voltage and the first object D shaft voltage, first object Q shaft voltage is determined；
Based on first object D shaft voltage and first object Q shaft voltage, the compressor operation is controlled.
Further, described the step of determining first object D shaft voltage based on three-phase current, includes:
Based on the three-phase current, the first D shaft current and the first Q shaft current at the compressor current time are obtained, is obtained
The the second target D shaft voltage and the second target Q shaft voltage of last moment are taken, and based on the first D shaft current and the first Q axis electricity
Stream, the second target D shaft voltage and the second target Q shaft voltage obtain angular frequency；
The 2nd D shaft current is determined based on the angular frequency, and is based on described instruction modulation voltage, the second target D shaft voltage
And the second target Q shaft voltage, determine the 3rd D shaft current；
Based on the 3rd D shaft current, the 2nd D shaft current and the first D shaft current, first object D shaft voltage is determined.
Further, described to be based on the limitation voltage and the first object D shaft voltage, determine first object Q axis
The step of voltage includes:
Target Q shaft current is determined based on the angular frequency, and based on the first Q shaft current and target Q axis electricity
Stream, determines the first Q shaft voltage；
Based on the first object D shaft voltage and the limitation voltage, the 2nd Q shaft voltage is determined；
Based on the first Q shaft voltage and the 2nd Q shaft voltage, the first object Q shaft voltage is determined.
Further, described to be based on the first Q shaft voltage and the 2nd Q shaft voltage, determine the first object Q
The step of shaft voltage includes:
Determine whether the first Q shaft voltage is less than the 2nd Q shaft voltage；
If the first Q shaft voltage is less than the 2nd Q shaft voltage, described the is set by the first Q shaft voltage
One target Q shaft voltage；
If the first Q shaft voltage is greater than or equal to the 2nd Q shaft voltage, set the 2nd Q shaft voltage to
The first object Q shaft voltage.
Further, described to be based on first object D shaft voltage and first object Q shaft voltage, control the compressor fortune
Capable step includes:
The first object D shaft voltage and first object Q shaft voltage are coordinately transformed, to obtain the static seat of two-phase
First voltage u under mark systemαAnd second voltage uβ；
Based on the first voltage uαAnd second voltage uβRealization of pulse width modulation based on voltage space vector SVPWM is carried out, to obtain
SVPWM signal；
The compressor operation is controlled based on the SVPWM signal.
Further, after described the step of controlling compressor operation based on the limitation voltage, the compressor
Control method further include:
When the first duration after controlling the compressor and running reaches the first preset duration, periodically based on default
Step-length increases the limitation voltage, so that the limitation voltage reaches the second predeterminated voltage, wherein second predeterminated voltage is big
In described instruction modulation voltage.
Further, after described the step of controlling compressor operation based on the limitation voltage, the compressor
Control method further include:
There is no when the target phase current greater than predetermined current in the current three-phase current of the compressor, add up described
There is no the second durations of the target phase current greater than predetermined current in three-phase current；
When the second duration reaches the second preset duration, the limitation voltage is periodically increased based on preset step-length, with
The limitation voltage is set to reach the second predeterminated voltage, wherein second predeterminated voltage is greater than described instruction modulation voltage.
In addition, to achieve the above object, the present invention also provides a kind of compressor control device, the compressor control device
Include: memory, processor and be stored in the compressor control program that can be run on the memory and on the processor,
The step of compressor control program realizes compressor control method above-mentioned when being executed by the processor.
In addition, to achieve the above object, it is described computer-readable the present invention also provides a kind of computer readable storage medium
Compressor control program is stored on storage medium, the compressor control program realizes compression above-mentioned when being executed by processor
The step of machine control method.
The present invention is then determined default with the presence or absence of being greater than in three-phase current by the bus current of the acquisition compressor
The target phase current of electric current；If then there is the target phase current greater than predetermined current in three-phase current, by the first default electricity
Pressure is set as the corresponding limitation voltage of voltage vector of the compressor, is then based on the limitation voltage and controls the compressor
Operation can be real when the decline of the busbar voltage of compressor, bus current are larger to reduce the running frequency of the compressor
The automatic frequency reducing of existing compressor, so that the running frequency of compressor and electric current reduce with the decline of busbar voltage, due to default
Electric current is less than the overcurrent protection electric current of compressor, and then the automatic drop of compressor can be realized before overcurrent occurs for compressor
Frequently, there is a situation where overcurrents due to having little time frequency reducing for compressor when preventing busbar voltage from declining.
Detailed description of the invention
Fig. 1 is the compressor control device structural schematic diagram for the hardware running environment that the embodiment of the present invention is related to；
Fig. 2 is the flow diagram of compressor control method first embodiment of the present invention；
Fig. 3 is the control process schematic diagram of compressor control method of the present invention；
Compressor current changes schematic diagram when Fig. 4 is master control frequency limit relay protective scheme；
Fig. 5 is that compressor current changes schematic diagram in compressor control method of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
As shown in Figure 1, Fig. 1 is the compressor control device structure for the hardware running environment that the embodiment of the present invention is related to
Schematic diagram.
Compressor control device of the embodiment of the present invention can be air-conditioning or compressor.As shown in Figure 1, the compressor control
Device may include: processor 1001, such as CPU, network interface 1004, user interface 1003, memory 1005, communication bus
1002.Wherein, communication bus 1002 is for realizing the connection communication between these components.User interface 1003 may include display
Shield (Display), input unit such as keyboard (Keyboard), optional user interface 1003 can also include that the wired of standard connects
Mouth, wireless interface.Network interface 1004 optionally may include standard wireline interface and wireless interface (such as WI-FI interface).It deposits
Reservoir 1005 can be high speed RAM memory, be also possible to stable memory (non-volatile memory), such as magnetic
Disk storage.Memory 1005 optionally can also be the storage device independently of aforementioned processor 1001.
It will be understood by those skilled in the art that compressor control device structure shown in Fig. 1 is not constituted to compressor
The restriction of control device may include perhaps combining certain components or different components than illustrating more or fewer components
Arrangement.
As shown in Figure 1, as may include that operating system, network are logical in a kind of memory 1005 of computer storage medium
Believe module, Subscriber Interface Module SIM and compressor control program.
In compressor control device shown in Fig. 1, network interface 1004 is mainly used for connecting background server, with backstage
Server carries out data communication；User interface 1003 is mainly used for connecting client (user terminal), and it is logical to carry out data with client
Letter；And processor 1001 can be used for calling the compressor control program stored in memory 1005.
In the present embodiment, compressor control device includes: memory 1005, processor 1001 and is stored in the storage
On device 1005 and the compressor control program that can be run on the processor 1001, wherein processor 1001 calls memory
When the compressor control program stored in 1005, and execute following operation:
The bus current of the compressor is obtained, the bus current includes three-phase current；
It determines in three-phase current with the presence or absence of the target phase current greater than predetermined current；
If there is the target phase current greater than predetermined current in three-phase current, the pressure is set by the first predeterminated voltage
The corresponding limitation voltage of the voltage vector of contracting machine, wherein first predeterminated voltage is less than the vector modulation water of the compressor
Put down corresponding vector modulation voltage；
The compressor operation is controlled based on the limitation voltage, to reduce the running frequency of the compressor.
Further, processor 1001 can call the compressor control program stored in memory 1005, also execute with
Lower operation:
First object D shaft voltage is determined based on three-phase current；
Based on the limitation voltage and the first object D shaft voltage, first object Q shaft voltage is determined；
Based on first object D shaft voltage and first object Q shaft voltage, the compressor operation is controlled.
Further, processor 1001 can call the compressor control program stored in memory 1005, also execute with
Lower operation:
Based on the three-phase current, the first D shaft current and the first Q shaft current at the compressor current time are obtained, is obtained
The the second target D shaft voltage and the second target Q shaft voltage of last moment are taken, and based on the first D shaft current and the first Q axis electricity
Stream, the second target D shaft voltage and the second target Q shaft voltage obtain angular frequency；
The 2nd D shaft current is determined based on the angular frequency, and is based on described instruction modulation voltage, the second target D shaft voltage
And the second target Q shaft voltage, determine the 3rd D shaft current；
Based on the 3rd D shaft current, the 2nd D shaft current and the first D shaft current, first object D shaft voltage is determined.
Further, processor 1001 can call the compressor control program stored in memory 1005, also execute with
Lower operation:
Target Q shaft current is determined based on the angular frequency, and based on the first Q shaft current and target Q axis electricity
Stream, determines the first Q shaft voltage；
Based on the first object D shaft voltage and the limitation voltage, the 2nd Q shaft voltage is determined；
Based on the first Q shaft voltage and the 2nd Q shaft voltage, the first object Q shaft voltage is determined.
Further, processor 1001 can call the compressor control program stored in memory 1005, also execute with
Lower operation:
Determine whether the first Q shaft voltage is less than the 2nd Q shaft voltage；
If the first Q shaft voltage is less than the 2nd Q shaft voltage, described the is set by the first Q shaft voltage
One target Q shaft voltage；
If the first Q shaft voltage is greater than or equal to the 2nd Q shaft voltage, set the 2nd Q shaft voltage to
The first object Q shaft voltage.
Further, processor 1001 can call the compressor control program stored in memory 1005, also execute with
Lower operation:
The first object D shaft voltage and first object Q shaft voltage are coordinately transformed, to obtain the static seat of two-phase
First voltage u under mark systemαAnd second voltage uβ；
Based on the first voltage uαAnd second voltage uβRealization of pulse width modulation based on voltage space vector SVPWM is carried out, to obtain
SVPWM signal；
The compressor operation is controlled based on the SVPWM signal.
Further, processor 1001 can call the compressor control program stored in memory 1005, also execute with
Lower operation:
When the first duration after controlling the compressor and running reaches the first preset duration, periodically based on default
Step-length increases the limitation voltage, so that the limitation voltage reaches the second predeterminated voltage, wherein second predeterminated voltage is big
In described instruction modulation voltage.
Further, processor 1001 can call the compressor control program stored in memory 1005, also execute with
Lower operation:
There is no when the target phase current greater than predetermined current in the current three-phase current of the compressor, add up described
There is no the second durations of the target phase current greater than predetermined current in three-phase current；
When the second duration reaches the second preset duration, the limitation voltage is periodically increased based on preset step-length, with
The limitation voltage is set to reach the second predeterminated voltage, wherein second predeterminated voltage is greater than described instruction modulation voltage.
The present invention also provides a kind of compressor control methods, are compressor control method first of the present invention referring to Fig. 2, Fig. 2
The flow diagram of embodiment.
Step S110, obtains the bus current of the compressor, and the bus current includes three-phase current；
In the present embodiment, in the compressor operation of air-conditioning, the bus current of the compressor is obtained, i.e. acquisition compressor
Three-phase current specifically can acquire compressor bus current in real time, with Real-time Reconstruction compressor three-phase current.
It is understood that sampling resistor can be arranged in the bus circuit of compressor, acquired in real time by sampling resistor
For bus current to reconstruct three-phase current, which can be three-phase current amplitude or three-phase current virtual value.
Step S120 is determined in three-phase current with the presence or absence of the target phase current greater than predetermined current；
In the present embodiment, predetermined current is the KB limit of the three-phase current of compressor, which is less than compression
The overcurrent protection electric current of machine, when three-phase current is three-phase current amplitude, which is less than the overcurrent protection electricity of compressor
Amplitude is flowed, or when three-phase current is three-phase current virtual value, the overcurrent protection electric current which is less than compressor has
Valid value.
In the present embodiment, when getting three-phase current, judge in three-phase current with the presence or absence of the mesh greater than predetermined current
Mark phase current specifically can first be compared three-phase current, obtain maximum current i.e. bus current in three-phase current most
Big value, judges whether the bus current maximum value is greater than predetermined current, if the bus current maximum value is greater than predetermined current, sentences
Determine the target phase current for having greater than predetermined current in three-phase current, otherwise determines that there is no be greater than predetermined current in three-phase current
Target phase current.
Step S130 sets the first predeterminated voltage if there is the target phase current greater than predetermined current in three-phase current
It is set to the corresponding limitation voltage of voltage vector of the compressor, wherein first predeterminated voltage is less than the compressor
The horizontal corresponding vector modulation voltage of vector modulation；
Wherein, the horizontal corresponding vector modulation voltage of the vector modulation of compressor is FwkLvl, specific formula are as follows:
Wherein, M is that vector modulation is horizontal, VdcFor the current DC bus-bar voltage of compressor.It should be noted that compressing
When the currently practical working voltage of machine is less than or equal to vector modulation voltage FwkLvl, based on currently practical working voltage control pressure
Contracting machine, compressor does not enter weak magnetic area at this time, and the 3rd D shaft current is equal to 0；It is greater than in the currently practical working voltage of compressor and refers to
When enabling modulation voltage FwkLvl, modulation voltage FwkLvl controls compressor based on instruction, and compressor enters weak magnetic area, third at this time
D shaft current is less than 0.
It is understood that the corresponding limitation voltage of voltage vector of compressor is arranged in the control logic of compressor
ModLim, when compressor operates normally, which is the second predeterminated voltage, which is greater than compressor
The horizontal corresponding vector modulation voltage of vector modulation, to guarantee that compression function normally enters weak magnetic control.
In the present embodiment, exists if the bus current maximum value is greater than predetermined current, i.e., in three-phase current and be greater than default electricity
The target phase current of stream, then the corresponding limitation voltage of the voltage vector for setting the compressor for the first predeterminated voltage, this
One predeterminated voltage is less than the horizontal corresponding vector modulation voltage of vector modulation of the compressor, so that compressor is only able to carry out
MTPA control, cannot be introduced into weak magnetic control.
Step S140 controls the compressor operation based on the limitation voltage, to reduce the operation frequency of the compressor
Rate.
In the present embodiment, when setting limitation voltage for the first predeterminated voltage, compressor is controlled according to the limitation voltage
Operation, especially by the voltage vector of limitation voltage control compressor output, so that compressor is only able to carry out MTPA control,
And then when the decline of the busbar voltage of compressor, bus current rise, the automatic frequency reducing of the frequency of compressor is realized, so that compressor
Running frequency and electric current reduce with the decline of busbar voltage, compressor is due to having little time frequency reducing when preventing busbar voltage from declining
The case where leading to overcurrent.Also, if compressor is in weak magnetic control, as the frequency reducing of compressor automatically exits from weak magnetic control.
Further, in one embodiment, after step S120, the compressor control method further include:
If the target phase current greater than predetermined current is not present in three-phase current, the pressure is controlled based on the second predeterminated voltage
The operation of contracting machine.
It is pre- based on second when target phase current being not present in the three-phase current of the bus of real-time monitoring in the present embodiment
If voltage controls the compressor operation, with the operating status for maintaining compressor current.
Further, in one embodiment, the compressor control method further include:
When the busbar voltage of compressor is less than predeterminated voltage, under-voltage protection is carried out to compressor.And then in bus electricity
Pressure then triggers the under-voltage protection of compressor when dropping too low, which is equal to voltage when triggering under-voltage protection.
Further, in another embodiment, after step S140, the compressor control method further include: described in control
When the first duration after compressor operation reaches the first preset duration, the limitation electricity is periodically increased based on preset step-length
Pressure, so that the limitation voltage reaches the second predeterminated voltage, wherein second predeterminated voltage is greater than described instruction modulation electricity
Pressure.
Wherein, the first preset duration can be rationally arranged, such as first preset duration is set as 10 seconds.
It is understood that over-current phenomenon avoidance is transient phenomenon, therefore, first after carrying out automatic frequency reducing to compressor
Duration reaches the first preset duration, periodically increases the limitation voltage based on preset step-length, so that the limitation voltage reaches
To the second predeterminated voltage, and then the working condition of compressor is adjusted in time, so that compressor operates normally, wherein preset step-length
Can rationally it be arranged according to the first predeterminated voltage and the second predeterminated voltage, i.e., according to the first predeterminated voltage and the second default electricity
Preset step-length is arranged in difference between pressure, the phenomenon that realize the incremental reply of compressor frequency, prevent rush of current.
In the prior art, if being directly added into frequency control in the driving algorithm of compressor, it is also desirable to by outside revolving speed
The controlling units such as ring, current inner loop, phaselocked loop, it is still desirable to certain delay, however it remains the case where responding not in time.And this
In application, the voltage vector size of output is directly controlled, it is not necessary to by the ring that the response speeds such as revolving speed outer ring, phaselocked loop are slower
Section.So faster, response is much sooner for the response speed of the application compared with being directly added into frequency control in control algolithm.
The application improves air-conditioning (compressor) to the adaptability and operation of network voltage so can greatly reduce the number of overcurrent shutdown
Reliability.
The compressor control method that the present embodiment proposes then determines three by obtaining the bus current of the compressor
With the presence or absence of the target phase current greater than predetermined current in phase current；If then there is the mesh greater than predetermined current in three-phase current
Phase current is marked, then the corresponding limitation voltage of the voltage vector for setting the compressor for the first predeterminated voltage is then based on institute
It states limitation voltage and controls the compressor operation, it, can be in the bus electricity of compressor to reduce the running frequency of the compressor
When drops, bus current are larger, the automatic frequency reducing of compressor is realized, so that the running frequency of compressor and electric current are with bus electricity
The decline of pressure and reduce, due to predetermined current be less than compressor overcurrent protection electric current, and then can compressor occur overcurrent
The automatic frequency reducing of compressor is realized before, and the feelings of overcurrent occur because having little time frequency reducing for compressor when preventing busbar voltage from declining
Condition.
Based on first embodiment, the second embodiment of compressor control method of the present invention, in the present embodiment, step are proposed
S140 includes:
Step S141 determines first object D shaft voltage based on three-phase current；
Step S142 is based on the limitation voltage and the first object D shaft voltage, determines first object Q shaft voltage；
Step S143 is based on first object D shaft voltage and first object Q shaft voltage, controls the compressor operation.
Referring to Fig. 3, in the present embodiment, first object D shaft voltage V is first determined based on three-phase currentd, then pass through the first mesh
Mark D shaft voltage VdAnd limitation voltage ModLim, determine first object Q shaft voltage Vq, and it is based on first object D shaft voltage VdWith
And first object Q shaft voltage VqCompressor operation is controlled, specifically to first object D shaft voltage and first object Q shaft voltage
It is coordinately transformed, to obtain the first voltage u under two-phase stationary coordinate systemαAnd second voltage uβ, then it is based on described first
Voltage uαAnd second voltage uβRealization of pulse width modulation based on voltage space vector SVPWM is carried out, to obtain SVPWM signal, and according to SVPWM
Signal controls the compressor operation.
The compressor control method that the present embodiment proposes, by determining first object D shaft voltage based on three-phase current, then
Based on the limitation voltage and the first object D shaft voltage, first object Q shaft voltage is determined, be then based on first object D
Shaft voltage and first object Q shaft voltage control the compressor operation, can be according to first object D shaft voltage and first
Target Q shaft voltage accurately controls compressor, and then realizes the automatic frequency reducing of compressor, compression when busbar voltage being effectively prevent to reduce
Machine leads to that there is a situation where overcurrents because having little time frequency reducing.
Based on second embodiment, the 3rd embodiment of compressor control method of the present invention, in the present embodiment, step are proposed
S141 includes:
Step S1411 is based on the three-phase current, obtains the first D shaft current and the first Q at the compressor current time
Shaft current, obtains the second target D shaft voltage and the second target Q shaft voltage of last moment, and based on the first D shaft current and
First Q shaft current, the second target D shaft voltage and the second target Q shaft voltage obtain angular frequency；
Step S1412 determines the 2nd D shaft current based on the angular frequency, and is based on described instruction modulation voltage, the second mesh
D shaft voltage and the second target Q shaft voltage are marked, determines the 3rd D shaft current；
Step S1413 is based on the 3rd D shaft current, the 2nd D shaft current and the first D shaft current, determines first object D axis
Voltage.
Referring to Fig. 3, in the present embodiment, coordinate conversion is carried out to three-phase current, obtains the first D shaft current idAnd the first Q axis
Electric current iq。
And it is based on the first D shaft current id, the first Q shaft current iq, last moment the second target D shaft voltage VdWith the second mesh
Mark Q shaft voltage VqIt carries out flux estimate algorithm and phase lock control obtains angular frequency.
Then, referring to Fig. 3, PI control is carried out based on angular frequency, and control result is subjected to optimum torque MTPA control, obtained
To the 2nd D shaft current id_ref1And target Q shaft current iq_ref；Simultaneously based on instruction modulation voltage FwkLvl, last moment the
Two target D shaft voltage VdAnd the second target Q shaft voltage VqPI is carried out to control to obtain the 3rd D shaft current id_ref2, it is based on the 2nd D axis
Electric current id_ref1And the 3rd D shaft current id_ref2Obtain target D shaft current id_ref；Then according to target D shaft current id_refAnd
First D shaft current idPI control is carried out, first object D shaft voltage V is obtainedd。
It is current to obtain the compressor by being based on the three-phase current for the compressor control method that the present embodiment proposes
The first D shaft current at moment and the first Q shaft current obtain the second target D shaft voltage and the second target Q axis electricity of last moment
Pressure, and angle is obtained based on the first D shaft current and the first Q shaft current, the second target D shaft voltage and the second target Q shaft voltage
Frequency then determines the 2nd D shaft current based on the angular frequency, and is based on described instruction modulation voltage, the second target D shaft voltage
And the second target Q shaft voltage, it determines the 3rd D shaft current, is then based on the 3rd D shaft current, the 2nd D shaft current and the first D
Shaft current determines first object D shaft voltage, can accurately determine first object D shaft voltage, and then improve the automatic of compressor
The accuracy of frequency reducing.
Based on 3rd embodiment, the fourth embodiment of compressor control method of the present invention, in the present embodiment, step are proposed
S142 includes:
Step S1421 determines target Q shaft current based on the angular frequency, and based on the first Q shaft current and described
Target Q shaft current, determines the first Q shaft voltage；
Step S1422 is based on the first object D shaft voltage and the limitation voltage, determines the 2nd Q shaft voltage；
Step S1423 is based on the first Q shaft voltage and the 2nd Q shaft voltage, determines the first object Q axis
Voltage.
In the present embodiment, referring to Fig. 3, target Q shaft current i is first determined based on angular frequencyq_ref, it is based on the first Q shaft current iq
And target Q shaft current iq_ref, the 2nd Q shaft current is obtained, and PI is carried out to the 2nd Q shaft current and controls to obtain the first Q shaft voltage.
Based on the first object D shaft voltage and the limitation voltage, the 2nd Q shaft voltage V is determinedqLim, wherein
Then, the first Q shaft voltage and the 2nd Q shaft voltage V are based onqLim determines first object Q shaft voltage Vq, with accurate
Obtain first object Q shaft voltage Vq, wherein the 2nd Q shaft voltage VqLim is first object Q shaft voltage VqMaximum voltage.
Further, in one embodiment, step S1423 includes:
Step a, determines whether the first Q shaft voltage is less than the 2nd Q shaft voltage；
Step b sets the first Q shaft voltage to if the first Q shaft voltage is less than the 2nd Q shaft voltage
The first object Q shaft voltage；
Step c, if the first Q shaft voltage is greater than or equal to the 2nd Q shaft voltage, by the 2nd Q shaft voltage
It is set as the first object Q shaft voltage.
In the present embodiment, the first Q shaft voltage and the 2nd Q shaft voltage V are being obtainedqWhen Lim, judge that the first Q shaft voltage is
It is no less than the 2nd Q shaft voltage, if the first Q shaft voltage is set as first object Q less than the 2nd Q shaft voltage, by the first Q shaft voltage
Shaft voltage Vq, otherwise by the 2nd Q shaft voltage VqLim is set as first object Q shaft voltage Vq, accurately to obtain first object Q axis electricity
Pressure.
The compressor control method that the present embodiment proposes, by determining target Q shaft current based on the angular frequency, and is based on
The first Q shaft current and the target Q shaft current, determine the first Q shaft voltage, then based on the first object D axis electricity
Pressure and the limitation voltage, determine the 2nd Q shaft voltage, then based on the first Q shaft voltage and the 2nd Q axis electricity
Pressure, determines the first object Q shaft voltage, can accurately determine first object Q shaft voltage, and then improve the automatic of compressor
The accuracy of frequency reducing.
Based on second embodiment, the 5th embodiment of compressor control method of the present invention, in the present embodiment, step are proposed
S143 includes:
Step S1431 is coordinately transformed the first object D shaft voltage and first object Q shaft voltage, to obtain
First voltage u under two-phase stationary coordinate systemαAnd second voltage uβ；
Step S1432 is based on the first voltage uαAnd second voltage uβCarry out Realization of pulse width modulation based on voltage space vector
SVPWM, to obtain SVPWM signal；
Step S1433 controls the compressor operation based on the SVPWM signal.
It is right after getting first object D shaft voltage and first object Q shaft voltage referring to Fig. 3 in the present embodiment
First object D shaft voltage and first object Q shaft voltage are coordinately transformed, to obtain the first electricity under two-phase stationary coordinate system
Press uαAnd second voltage uβ, then it is based on the first voltage uαAnd second voltage uβCarry out space vector of voltage pulsewidth tune
SVPWM processed to obtain SVPWM signal, and controls the compressor according to SVPWM signal and runs.
The compressor control method that the present embodiment proposes, by the first object D shaft voltage and first object Q axis
Voltage is coordinately transformed, to obtain the first voltage u under two-phase stationary coordinate systemαAnd second voltage uβ, then based on described
First voltage uαAnd second voltage uβRealization of pulse width modulation based on voltage space vector SVPWM is carried out then to be based on to obtain SVPWM signal
The SVPWM signal controls the compressor operation, and then realizes according to target D shaft voltage and target Q shaft voltage to compression
Machine is controlled, to realize the automatic frequency reducing of compressor when the decline of the busbar voltage of compressor, bus current are larger.
Based on above-mentioned each embodiment, the sixth embodiment of compressor control method of the present invention is proposed, in the present embodiment,
After step S140, the compressor control method further include:
Step S150, when there is no the target phase currents greater than predetermined current in the current three-phase current of the compressor
When, add up in the three-phase current that the second duration of the target phase current greater than predetermined current is not present；
Step S160 periodically increases the limit based on preset step-length when the second duration reaches the second preset duration
Voltage processed, so that the limitation voltage reaches the second predeterminated voltage, wherein second predeterminated voltage is modulated greater than described instruction
Voltage.
Wherein, second predeterminated voltage is greater than vector modulation voltage, and the second preset duration can be rationally arranged, such as
Second preset duration is 3 seconds, 5 seconds etc..
In the present embodiment, after limitation voltage controls the compressor operation, the bus current of real-time monitoring compressor,
Then added up if it does not exist with determining in the current three-phase current of compressor with the presence or absence of the target phase current greater than predetermined current
There is no the second durations of the target phase current greater than predetermined current in the three-phase current, if reaching in the second duration
When to the second preset duration, the limitation voltage is periodically increased based on preset step-length, so that limitation voltage reaches the second default electricity
Pressure, and then restore the normal work of compressor, the phenomenon that realize the incremental reply of compressor frequency, prevent rush of current.
Wherein, preset step-length can be rationally arranged according to the first predeterminated voltage and the second predeterminated voltage, i.e., according to
Preset step-length is arranged in difference between one predeterminated voltage and the second predeterminated voltage.
The compressor control method that the present embodiment proposes, by being not present when in the current three-phase current of the compressor
Greater than predetermined current target phase current when, add up in the three-phase current that there is no the target phase currents greater than predetermined current
Second duration periodically increases the limit based on preset step-length then when the second duration reaches the second preset duration
Voltage processed can adjust in time compressor after busbar voltage recovery so that the limitation voltage reaches the second predeterminated voltage
Working condition, so that compressor operates normally.
Example 1, by taking IRMCF341 control program as an example,
Wherein, vector modulation voltage FwkLvl (is here equivalence value, the register is practical in IR scheme 0~1430
Value be 0~169) section is linear modulation area, it is overmodulation in 1430~1651 sections.Voltage is limited when normal operation
ModLim ratio FwkLvl is big, and compressor just can enter weak magnetic field operation area, and general ModLim value is greater than equal to 1430.Such as
When FwkLvl takes 1280, when desirable 1430, the FwkLvl of ModLim takes 1400, ModLim can also take 1430；But when FwkLvl connects
When nearly 1430 even more than 1430, ModLim most cans be compared to big 20 digital quantities of FwkLvl or more (but can not be too many greatly), such as
When FwkLvl takes 1430, when desirable 1500, the FwkLvl of ModLim takes 1545, ModLim desirable 1570, etc..But it is automatic when needing
When frequency reducing, small 100 digital quantities of ModLim ratio FwkLvl or more can be enabled, can be specifically adjusted according to actual effect.
For example, ModLim when compressor operates normally is 1430, FwkLvl when normal operation is 1400 (to be less than
1430), compressor hardware demagnetization protective current value is 48A.When compressor operates in 110hz, quickly by network voltage by 220V
It is reduced to 188V, busbar voltage is down to 440V by 514V.It is imitated by only master control frequency limit relay protective scheme and using control of the invention
Fruit compares.
Referring to Fig. 4, compressor current changes schematic diagram when Fig. 4 is master control frequency limit relay protective scheme, in Fig. 4, in bus current
When reaching overcurrent, master control frequency limit is not yet responded, and compressor current persistently increases until overcurrent is shut down.
It is that compressor current changes schematic diagram in compressor control method of the present invention referring to Fig. 5, Fig. 5.In Fig. 5, in three-phase
The target phase current existed in electric current greater than predetermined current enables ModLim be equal to immediately when that is, bus current maximum value is more than 40A
1300 (less than the 1400 of FwkLvl) simultaneously keep 5s, and compressor frequency is down to 97hz (simultaneous pressure by 110hz automatically at this time
The reduction of the electromechanical stream of contracting), if busbar voltage continues to decline during this, compressor frequency also continues to reduce, and remains dynamic
State adjustment, as shown in Figure 5.After 5s, ModLim is gradually incremented to by the step-length per second for increasing by 10 digital quantities from 1300
1430。
If linear modulation rate range is set as 0~1, overmodulation modulation rate range is 1~1.103, at this time vector modulation
Voltage FwkLvl value range is 0~1.103 (per unit value), and limitation voltage ModLim value range is that 0~1.2 (maximum value is big
In 1.103, per unit value).It is now assumed that vector modulation rate when compressor operates normally is 0.9, i.e. FwkLvl is 0.9 (mark
Value), ModLim when normal operation is set as 1 (per unit value), when voltage ripple of power network causes compressor current to increase above 55A
When (assuming that hardware demagnetization protective current is 60A), enables ModLim be equal to for 0.8 (being less than FwkLvl) immediately and keep 10s, press at this time
Generation of the contracting chance automatic frequency reducing immediately to avoid overcurrent from shutting down.ModLim is incremented by 0.01 per unit value with per second after 10s
Step-length restore from 0.8 to 1.
In addition, the embodiment of the present invention also proposes a kind of computer readable storage medium, the computer readable storage medium
On be stored with compressor control program, following operation is realized when the compressor control program is executed by processor:
The bus current of the compressor is obtained, the bus current includes three-phase current；
It determines in three-phase current with the presence or absence of the target phase current greater than predetermined current；
If there is the target phase current greater than predetermined current in three-phase current, the pressure is set by the first predeterminated voltage
The corresponding limitation voltage of the voltage vector of contracting machine, wherein first predeterminated voltage is less than the vector modulation water of the compressor
Put down corresponding vector modulation voltage；
The compressor operation is controlled based on the limitation voltage, to reduce the running frequency of the compressor.
Further, following operation is also realized when the compressor control program is executed by processor:
First object D shaft voltage is determined based on three-phase current；
Based on the limitation voltage and the first object D shaft voltage, first object Q shaft voltage is determined；
Based on first object D shaft voltage and first object Q shaft voltage, the compressor operation is controlled.
Further, following operation is also realized when the compressor control program is executed by processor:
Based on the three-phase current, the first D shaft current and the first Q shaft current at the compressor current time are obtained, is obtained
The the second target D shaft voltage and the second target Q shaft voltage of last moment are taken, and based on the first D shaft current and the first Q axis electricity
Stream, the second target D shaft voltage and the second target Q shaft voltage obtain angular frequency；
The 2nd D shaft current is determined based on the angular frequency, and is based on described instruction modulation voltage, the second target D shaft voltage
And the second target Q shaft voltage, determine the 3rd D shaft current；
Based on the 3rd D shaft current, the 2nd D shaft current and the first D shaft current, first object D shaft voltage is determined.
Further, following operation is also realized when the compressor control program is executed by processor:
Target Q shaft current is determined based on the angular frequency, and based on the first Q shaft current and target Q axis electricity
Stream, determines the first Q shaft voltage；
Based on the first object D shaft voltage and the limitation voltage, the 2nd Q shaft voltage is determined；
Based on the first Q shaft voltage and the 2nd Q shaft voltage, the first object Q shaft voltage is determined.
Further, following operation is also realized when the compressor control program is executed by processor:
Determine whether the first Q shaft voltage is less than the 2nd Q shaft voltage；
If the first Q shaft voltage is less than the 2nd Q shaft voltage, described the is set by the first Q shaft voltage
One target Q shaft voltage；
If the first Q shaft voltage is greater than or equal to the 2nd Q shaft voltage, set the 2nd Q shaft voltage to
The first object Q shaft voltage.
Further, following operation is also realized when the compressor control program is executed by processor:
The first object D shaft voltage and first object Q shaft voltage are coordinately transformed, to obtain the static seat of two-phase
First voltage u under mark systemαAnd second voltage uβ；
Based on the first voltage uαAnd second voltage uβRealization of pulse width modulation based on voltage space vector SVPWM is carried out, to obtain
SVPWM signal；
The compressor operation is controlled based on the SVPWM signal.
Further, following operation is also realized when the compressor control program is executed by processor:
When the first duration after controlling the compressor and running reaches the first preset duration, periodically based on default
Step-length increases the limitation voltage, so that the limitation voltage reaches the second predeterminated voltage, wherein second predeterminated voltage is big
In described instruction modulation voltage.
Further, following operation is also realized when the compressor control program is executed by processor:
There is no when the target phase current greater than predetermined current in the current three-phase current of the compressor, add up described
There is no the second durations of the target phase current greater than predetermined current in three-phase current；
When the second duration reaches the second preset duration, the limitation voltage is periodically increased based on preset step-length, with
The limitation voltage is set to reach the second predeterminated voltage, wherein second predeterminated voltage is greater than described instruction modulation voltage.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the system that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or system institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or system.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in one as described above
In storage medium (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that terminal device (it can be mobile phone,
Computer, server, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of compressor control method, which is characterized in that the compressor control method the following steps are included:
The bus current of the compressor is obtained, the bus current includes three-phase current；
It determines in three-phase current with the presence or absence of the target phase current greater than predetermined current；
If there is the target phase current greater than predetermined current in three-phase current, the compressor is set by the first predeterminated voltage
The corresponding limitation voltage of voltage vector, wherein first predeterminated voltage be less than the compressor vector modulation level it is right
The vector modulation voltage answered；
The compressor operation is controlled based on the limitation voltage, to reduce the running frequency of the compressor.
2. compressor control method as described in claim 1, which is characterized in that described based on described in limitation voltage control
Compressor run the step of include:
First object D shaft voltage is determined based on three-phase current；
Based on the limitation voltage and the first object D shaft voltage, first object Q shaft voltage is determined；
Based on first object D shaft voltage and first object Q shaft voltage, the compressor operation is controlled.
3. compressor control method as claimed in claim 2, which is characterized in that described to determine first object based on three-phase current
The step of D shaft voltage includes:
Based on the three-phase current, the first D shaft current and the first Q shaft current at the compressor current time are obtained, in acquisition
The second target D shaft voltage at one moment and the second target Q shaft voltage, and based on the first D shaft current and the first Q shaft current,
Second target D shaft voltage and the second target Q shaft voltage obtain angular frequency；
Determine the 2nd D shaft current based on the angular frequency, and based on described instruction modulation voltage, the second target D shaft voltage and
Second target Q shaft voltage, determines the 3rd D shaft current；
Based on the 3rd D shaft current, the 2nd D shaft current and the first D shaft current, first object D shaft voltage is determined.
4. compressor control method as claimed in claim 3, which is characterized in that described based on the limitation voltage and described
First object D shaft voltage, the step of determining first object Q shaft voltage include:
Target Q shaft current is determined based on the angular frequency, and is based on the first Q shaft current and the target Q shaft current, really
Fixed first Q shaft voltage；
Based on the first object D shaft voltage and the limitation voltage, the 2nd Q shaft voltage is determined；
Based on the first Q shaft voltage and the 2nd Q shaft voltage, the first object Q shaft voltage is determined.
5. compressor control method as claimed in claim 4, which is characterized in that it is described based on the first Q shaft voltage and
The 2nd Q shaft voltage, the step of determining the first object Q shaft voltage include:
Determine whether the first Q shaft voltage is less than the 2nd Q shaft voltage；
If the first Q shaft voltage is less than the 2nd Q shaft voltage, first mesh is set by the first Q shaft voltage
Mark Q shaft voltage；
If the first Q shaft voltage is greater than or equal to the 2nd Q shaft voltage, set described for the 2nd Q shaft voltage
First object Q shaft voltage.
6. compressor control method as claimed in claim 2, which is characterized in that it is described based on first object D shaft voltage and
First object Q shaft voltage, controlling the step of compressor is run includes:
The first object D shaft voltage and first object Q shaft voltage are coordinately transformed, to obtain two-phase stationary coordinate system
Under first voltage uαAnd second voltage uβ；
Based on the first voltage uαAnd second voltage uβRealization of pulse width modulation based on voltage space vector SVPWM is carried out, to obtain SVPWM
Signal；
The compressor operation is controlled based on the SVPWM signal.
7. such as compressor control method as claimed in any one of claims 1 to 6, which is characterized in that described based on the limitation electricity
After the step of voltage-controlled system compressor is run, the compressor control method further include:
When the first duration after controlling the compressor and running reaches the first preset duration, it is periodically based on preset step-length
Increase the limitation voltage, so that the limitation voltage reaches the second predeterminated voltage, wherein second predeterminated voltage is greater than institute
State vector modulation voltage.
8. such as compressor control method as claimed in any one of claims 1 to 6, which is characterized in that described based on the limitation electricity
After the step of voltage-controlled system compressor is run, the compressor control method further include:
There is no when the target phase current greater than predetermined current in the current three-phase current of the compressor, add up the three-phase
There is no the second durations of the target phase current greater than predetermined current in electric current；
When the second duration reaches the second preset duration, the limitation voltage is periodically increased based on preset step-length, so that institute
It states limitation voltage and reaches the second predeterminated voltage, wherein second predeterminated voltage is greater than described instruction modulation voltage.
9. a kind of compressor control device, which is characterized in that the compressor control device includes: memory, processor and deposits
The compressor control program that can be run on the memory and on the processor is stored up, the compressor control program is by institute
It states when processor executes and realizes such as the step of compressor control method described in any item of the claim 1 to 8.
10. a kind of computer readable storage medium, which is characterized in that be stored with compressor on the computer readable storage medium
Program is controlled, such as compression described in any item of the claim 1 to 8 is realized when the compressor control program is executed by processor
The step of machine control method.
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