CN104753429B - The computational methods of the magnetic pole logarithm of compressor electric motor, device in air-conditioner - Google Patents
The computational methods of the magnetic pole logarithm of compressor electric motor, device in air-conditioner Download PDFInfo
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- CN104753429B CN104753429B CN201510144727.1A CN201510144727A CN104753429B CN 104753429 B CN104753429 B CN 104753429B CN 201510144727 A CN201510144727 A CN 201510144727A CN 104753429 B CN104753429 B CN 104753429B
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Abstract
The invention discloses the computing device of the magnetic pole logarithm of compressor electric motor in the computational methods of magnetic pole logarithm and the air-conditioner with it of compressor electric motor in a kind of air-conditioner, the computational methods are comprised the following steps：When compressor electric motor runs on low frequency state, the DC voltage to the frequency converter of compressor electric motor is sampled to obtain sampled voltage；Treatment is filtered to sampled voltage to obtain DC voltage component, and alternating current voltage component is obtained according to sampled voltage and DC voltage component；Alternating current voltage component is processed by single-phase phase-locked loop obtain the first angular speed；The angular speed and the magnetic pole logarithm of the first angular speed calculation compressor electric motor of the compressor electric motor obtained according to estimation.The angular speed that the computational methods can be obtained by DC voltage and estimation obtains the magnetic pole logarithm of compressor electric motor, realizes simply, cost being increased without extra.
Description
Technical field
The present invention relates to air-conditioner technical field, the meter of the magnetic pole logarithm of compressor electric motor in more particularly to a kind of air-conditioner
The computing device of the magnetic pole logarithm of compressor electric motor in calculation method and a kind of air-conditioner.
Background technology
In air-conditioner, because compressor is normally placed in outdoor unit, therefore the model of compressor is easy to wear and tear, comes off
Or covered etc., made troubles to maintenance process.
Due to cannot quickly and efficiently obtain the model of compressor, therefore cannot just determine the parameter of compressor electric motor, such as
Resistance, inductance, magnetic pole logarithm etc., it is accurate to obtain compression especially for for the compressor electric motor for using vector control strategy
The parameter of electromechanical machine is particularly important.
If the parameter setting of compressor electric motor is unreasonable or inaccurate, will result directly in compressor electric motor cannot be normal
Operation, therefore, the parameter for accurately obtaining compressor electric motor just seems particularly important.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.
Therefore, it is an object of the present invention to propose a kind of angular speed that can be obtained by DC voltage and estimation
The computational methods of the magnetic pole logarithm of compressor electric motor in the air-conditioner of the accurate magnetic pole logarithm for obtaining compressor electric motor.
It is another object of the present invention to the computing device of the magnetic pole logarithm for proposing compressor electric motor in a kind of air-conditioner.
To reach above-mentioned purpose, one aspect of the present invention embodiment proposes a kind of pole pair of compressor electric motor in air-conditioner
Several computational methods, comprise the following steps：S1, it is electromechanical to the compression when the compressor electric motor runs on low frequency state
The DC voltage of the frequency converter of machine is sampled to obtain sampled voltage；S2, to the sampled voltage be filtered treatment with
DC voltage component is obtained, and alternating current voltage component is obtained according to the sampled voltage and the DC voltage component；S3, passes through
Single-phase phase-locked loop is processed the alternating current voltage component to obtain the first angular speed；And S4, according to the institute that estimation is obtained
State the angular speed of compressor electric motor and the magnetic pole logarithm of compressor electric motor described in first angular speed calculation.
The computational methods of the magnetic pole logarithm of compressor electric motor, work as compressor electric motor in air-conditioner according to embodiments of the present invention
When running on low frequency state, the DC voltage first to the frequency converter of compressor electric motor is sampled to obtain sampled voltage,
Then treatment is filtered to sampled voltage to obtain DC voltage component, and is obtained according to sampled voltage and DC voltage component
Alternating current voltage component, is processed alternating current voltage component by single-phase phase-locked loop to obtain the first angular speed, finally according to estimating
The magnetic pole logarithm of the angular speed of the compressor electric motor for obtaining and the first angular speed calculation compressor electric motor.Therefore, the present invention is real
Applying the computational methods of the magnetic pole logarithm of compressor electric motor in the air-conditioner of example can accurately obtain the magnetic pole logarithm of compressor electric motor,
Realize simply, cost being increased without extra, and reliability is high.
According to one embodiment of present invention, in step s 2, the sampled voltage is entered by low-pass first order filter
Row filtering process.
Preferably, the cut-off frequency of the low-pass first order filter can be 8-12Hz.
According to one embodiment of present invention, in step s 4, the compressor electric motor is estimated by position-sensor-free
Angular speed.
According to one embodiment of present invention, in step s 4, the magnetic of the compressor electric motor is calculated according to below equation
Number of pole-pairs：
Wherein, p is the magnetic pole logarithm of the compressor electric motor, ω0It is the angular speed of the compressor electric motor, ω1For described
First angular speed.
To reach above-mentioned purpose, another aspect of the present invention embodiment proposes a kind of magnetic pole of compressor electric motor in air-conditioner
The computing device of logarithm, including：Sampling module, the sampling module is used for when the compressor electric motor runs on low frequency state
DC voltage to the frequency converter of the compressor electric motor is sampled to obtain sampled voltage；Filtration module, the filtering
Module is used to be filtered the sampled voltage treatment to obtain DC voltage component；And computing module and single-phase lock phase
Ring, the computing module is used to obtain alternating current voltage component, the list according to the sampled voltage and the DC voltage component
Phase phaselocked loop is used to process the alternating current voltage component to obtain the first angular speed, and the computing module is always according to estimation
The magnetic pole logarithm of the angular speed of the compressor electric motor for obtaining and compressor electric motor described in first angular speed calculation.
The computing device of the magnetic pole logarithm of compressor electric motor in air-conditioner according to embodiments of the present invention, sampling module is in pressure
DC voltage when the electromechanical machine of contracting runs on low frequency state to the frequency converter of compressor electric motor is sampled to obtain sampling electricity
Pressure, filtration module is filtered treatment to sampled voltage to obtain DC voltage component, and computing module is according to sampled voltage and directly
Stream component of voltage obtains alternating current voltage component, and single-phase phase-locked loop is processed alternating current voltage component to obtain the first angular speed,
The angular speed and the magnetic pole logarithm of the first angular speed calculation compressor electric motor of the compressor electric motor that computing module is obtained according to estimation.
Therefore, the computing device of the magnetic pole logarithm of compressor electric motor can accurately obtain compression electromechanics in the air-conditioner of the embodiment of the present invention
The magnetic pole logarithm of machine, realizes simply, cost being increased without extra, and reliability is high.
According to one embodiment of present invention, the filtration module is low-pass first order filter, the first-order low-pass ripple
The cut-off frequency of device is 8-12Hz.
According to one embodiment of present invention, the computing module estimates the compressor electric motor by position-sensor-free
Angular speed.
According to one embodiment of present invention, the computing module calculates the magnetic of the compressor electric motor according to below equation
Number of pole-pairs：
Wherein, p is the magnetic pole logarithm of the compressor electric motor, ω0It is the angular speed of the compressor electric motor, ω1For described
First angular speed.
According to one embodiment of present invention, the compressor is single-rotor compressor.
Brief description of the drawings
Fig. 1 is the flow of the computational methods of the magnetic pole logarithm of compressor electric motor in air-conditioner according to embodiments of the present invention
Figure.
Fig. 2 is the electricity of the compressor electric motor when magnetic pole logarithm of compressor electric motor according to an embodiment of the invention is 2
The oscillogram of stream and DC voltage.
Fig. 3 is the compressor electric motor when magnetic pole logarithm of compressor electric motor in accordance with another embodiment of the present invention is 3
The oscillogram of electric current and DC voltage.
Fig. 4 is that the square frame of the computing device of the magnetic pole logarithm of compressor electric motor in air-conditioner according to embodiments of the present invention shows
It is intended to.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
It is exemplary to scheme the embodiment of description, it is intended to for explaining the present invention, and be not considered as limiting the invention.
With reference to the accompanying drawings come the magnetic pole logarithm of compressor electric motor in the air-conditioner for describing proposition according to embodiments of the present invention
Computational methods and air-conditioner in compressor electric motor magnetic pole logarithm computing device.
Fig. 1 is the flow of the computational methods of the magnetic pole logarithm of compressor electric motor in air-conditioner according to embodiments of the present invention
Figure.As shown in figure 1, the computational methods of the magnetic pole logarithm of compressor electric motor are comprised the following steps in the air-conditioner：
S1, when compressor electric motor runs on low frequency state, the DC voltage to the frequency converter of compressor electric motor is carried out
Sample to obtain sampled voltage.
Wherein, compressor can be single-rotor compressor.
S2, treatment is filtered to sampled voltage to obtain DC voltage component, and according to sampled voltage and DC voltage
Component obtains alternating current voltage component.
According to one embodiment of present invention, in this step, sampled voltage is filtered by low-pass first order filter
Ripple treatment.
Preferably, the cut-off frequency of low-pass first order filter can be 8-12Hz.
Specifically, when the compressor electric motor in air-conditioner runs on low frequency state, it is contemplated that compressor under low frequency state
The torque ripple of motor is very big, it is therefore desirable to carry out compensated torque to compressor electric motor so that the stabilization of speed of compressor electric motor,
So as to effectively reduce because the rotary speed unstabilization of compressor electric motor is fixed and caused by vibration of compressor phenomenon generation.Because compression is electromechanical
When machine runs on low frequency state, the amplitude of DC voltage can periodically be fluctuated with the rotating speed of compressor electric motor, because
This can obtain the magnetic pole logarithm of compressor electric motor by the characteristic.
When compressor electric motor runs on low frequency state, the DC voltage to the frequency converter of compressor electric motor is sampled
To obtain sampled voltage, then it is filtered treatment to sampled voltage to obtain DC voltage point by low-pass first order filter
Amount.Wherein, in order to obtain effective DC voltage component, it is contemplated that the degree of accuracy of filtering lag time and filtering process, generally
The cut-off frequency of low-pass first order filter is set to 10Hz or so, for example, can be by the cut-off frequency of low-pass first order filter
It is set to 8-12Hz.Then the sampled voltage of acquisition is made the difference with the DC voltage component after filtering process, to obtain alternating current
Pressure component, the alternating current voltage component is the rotor frequency identical sinusoidal quantity of and compressor electric motor.
S3, is processed alternating current voltage component to obtain the first angular speed by single-phase phase-locked loop.
S4, the angular speed and the pole pair of the first angular speed calculation compressor electric motor of the compressor electric motor obtained according to estimation
Number.
According to one embodiment of present invention, in this step, the angle of compressor electric motor is estimated by position-sensor-free
Speed.
According to one embodiment of present invention, the magnetic pole logarithm of compressor electric motor is calculated according to following formula (1)：
Wherein, p is the magnetic pole logarithm of compressor electric motor, ω0It is the angular speed of compressor electric motor, ω1It is the first angular speed.
Specifically, after obtaining alternating current voltage component according to sampled voltage and DC voltage component, by single-phase phase-locked loop pair
Alternating current voltage component is calculated to obtain the first angular velocity omega1。
At present, it is single-rotor compressor because air-conditioner is most of, therefore, the cycle of the stator current in compressor electric motor
It is change, the angular rate of the stator obtained by position-sensor-free is also a changing value.Accordingly, it would be desirable to stator
Angular rate carries out low-pass filtering treatment to obtain a stator angular speed for stabilization, the i.e. angular velocity omega of compressor electric motor0。
The first angular velocity omega that will be obtained1With the angular velocity omega of compressor electric motor0Bring above-mentioned formula (1) into be calculated, examine
Consider calculated value and be not necessarily integer value, therefore carry out value to obtain the magnetic pole of compressor electric motor according to the principle for rounding up
Logarithm p.If it should be noted that be there may be as the magnetic pole logarithm of compressor electric motor using a calculated value certain accidental
Property and unpredictability, therefore, it can to carry out the magnetic pole logarithm of compressor electric motor repeatedly calculate be averaged, for example, can count
10 times are calculated to average, then value is carried out to obtain the magnetic pole logarithm of compressor electric motor according still further to the principle for rounding up,
So as to effectively improve the accuracy of the magnetic pole logarithm for obtaining compressor electric motor.
Below according to a specific example of the invention, the present invention will be further described.
In order to the accurate magnetic pole logarithm for obtaining compressor electric motor, as far as possible in the operating mode that compressor electric motor is relatively stable
Tested under (compressor electric motor is in closed loop states, and the rotor speed of compressor electric motor is basicly stable).Wherein, compressor is worked as
Motor is relatively low into speed ratio during closed loop states by open loop situations, it is assumed that now the magnetic pole logarithm of compressor electric motor is 3, and with
Magnetic pole logarithm 3 is controlled to compressor electric motor.It should be noted that the magnetic pole logarithm of the compressor electric motor generally in air-conditioner
It is 2 or 3, so during test, generally choosing such as 3 pairs compressor electric motors of larger magnetic pole logarithm and being controlled.
If the magnetic pole logarithm of the compressor electric motor of reality is 2, as shown in Fig. 2 now, it is out of service in compressor electric motor
Each alternating component existed before (three-phase current of compressor electric motor is zero) in alternating component, and DC voltage includes pressure
Two current cycles of contracting machine current of electric.It should be noted that in fig. 2, the three-phase current of compressor electric motor exists larger
Harmonic components, reason is that compensated torque is increased when compressor electric motor runs on low frequency state.
If the magnetic pole logarithm of the compressor electric motor of reality is 3, as shown in figure 3, now each friendship in DC voltage
Three current cycles of the stream composition comprising compressor electric motor electric current.
Treatment is filtered to the DC voltage for obtaining to obtain DC voltage component according to above-mentioned steps, and will be obtained
DC voltage made the difference with the DC voltage component after filtering process, to obtain alternating current voltage component, then by single-phase lock
Phase ring is processed alternating current voltage component to obtain the first angular velocity omega1。
From Fig. 2 and Fig. 3, the cycle of the electric current of compressor electric motor is change, i.e., according to two kinds of current cycles or three
Planting current cycle carries out cyclically-varying, and the angular rate of the stator of acquisition is also a changing value, accordingly, it would be desirable to stator
Angular rate carries out low-pass filtering treatment to obtain a stator angular speed for stabilization, the i.e. angular velocity omega of compressor electric motor0。
The first angular velocity omega that will be obtained1With the angular velocity omega of compressor electric motor0Bring above-mentioned formula (1) into be calculated, so
Continue to obtain the first angular velocity omega afterwards1With the angular velocity omega of compressor electric motor0, and bring above-mentioned formula (1) into and calculated, altogether
Calculate 10 times, the results averaged that then will be calculated carries out value to obtain compressor electric motor according still further to the principle for rounding up
Magnetic pole logarithm p.
After the accurate magnetic pole logarithm p for obtaining compressor electric motor, the magnetic pole logarithm of pair compressor electric motor assumed is carried out
Update, so that compressor electric motor can run according to accurate Controlling model.
In sum, in air-conditioner according to embodiments of the present invention the magnetic pole logarithm of compressor electric motor computational methods, when
When compressor electric motor runs on low frequency state, the DC voltage first to the frequency converter of compressor electric motor is sampled to obtain
Sampled voltage, is then filtered treatment to obtain DC voltage component to sampled voltage, and according to sampled voltage and direct current
Pressure component obtains alternating current voltage component, alternating current voltage component is processed by single-phase phase-locked loop to obtain the first angular speed,
The angular speed and the magnetic pole logarithm of the first angular speed calculation compressor electric motor of the compressor electric motor obtained finally according to estimation.Cause
This, the computational methods of the magnetic pole logarithm of compressor electric motor can accurately obtain compressor electric motor in the air-conditioner of the embodiment of the present invention
Magnetic pole logarithm, realize simple, increase cost without extra, and reliability is high.
Fig. 4 is that the square frame of the computing device of the magnetic pole logarithm of compressor electric motor in air-conditioner according to embodiments of the present invention shows
It is intended to.As shown in figure 4, the computing device of the magnetic pole logarithm of compressor electric motor includes sampling module 10, filtering mould in the air-conditioner
Block 20, computing module 30 and single-phase phase-locked loop 40.
Wherein, sampling module 10 when compressor electric motor runs on low frequency state to the direct current of the frequency converter of compressor electric motor
Side voltage is sampled to obtain sampled voltage.Filtration module 20 is filtered treatment to sampled voltage to obtain DC voltage point
Amount.Computing module 30 obtains alternating current voltage component according to sampled voltage and DC voltage component, and single-phase phase-locked loop 40 is to alternating current
Pressure component is processed to obtain the first angular speed, the angular speed of the compressor electric motor that computing module 30 is obtained always according to estimation and
The magnetic pole logarithm of the first angular speed calculation compressor electric motor.
Wherein, compressor is single-rotor compressor.
According to one embodiment of present invention, filtration module 20 be low-pass first order filter, low-pass first order filter cut
Only frequency is 8-12Hz.
Specifically, when the compressor electric motor in air-conditioner runs on low frequency state, it is contemplated that compressor under low frequency state
The torque ripple of motor is very big, it is therefore desirable to carry out compensated torque to compressor electric motor so that the stabilization of speed of compressor electric motor,
So as to effectively reduce because the rotary speed unstabilization of compressor electric motor is fixed and caused by vibration of compressor phenomenon generation.Because compression is electromechanical
When machine runs on low frequency state, the amplitude of DC voltage can periodically be fluctuated with the rotating speed of compressor electric motor, because
This can obtain the magnetic pole logarithm of compressor electric motor by the characteristic.
When compressor electric motor runs on low frequency state, DC side electricity of the acquisition module 10 to the frequency converter of compressor electric motor
Pressure is sampled to obtain sampled voltage, and sampled voltage is filtered by such as low-pass first order filter of filtration module 20 then
Process to obtain DC voltage component.Wherein, in order to obtain effective DC voltage component, it is contemplated that filtering lag time and filter
The degree of accuracy of ripple treatment, is generally set to 10Hz or so, for example, can be low by single order by the cut-off frequency of low-pass first order filter
The cut-off frequency of bandpass filter is set to 8-12Hz.Then the DC voltage component after the sampled voltage and filtering process that will obtain
Make the difference, to obtain alternating current voltage component, the alternating current voltage component is one sinusoidal with the rotor frequency identical of compressor electric motor
Amount.
After obtaining alternating current voltage component according to sampled voltage and DC voltage component, by single-phase phase-locked loop 40 to alternating current
Pressure component is calculated to obtain the first angular velocity omega1。
According to one embodiment of present invention, computing module 30 estimates the angle speed of compressor electric motor by position-sensor-free
Degree.
According to one embodiment of present invention, computing module 30 calculates the magnetic pole of compressor electric motor according to above-mentioned formula (1)
Logarithm.
At present, it is single-rotor compressor because air-conditioner is most of, therefore, the cycle of the stator current in compressor electric motor
It is change, the angular rate of the stator that computing module 30 is obtained by position-sensor-free is also a changing value.Therefore, need
Low-pass filtering treatment is carried out to the angular rate of stator to obtain a stator angular speed for stabilization, the i.e. angle of compressor electric motor
Speed omega0。
The first angular velocity omega that computing module 30 will be obtained1With the angular velocity omega of compressor electric motor0Bring above-mentioned formula (1) into
Calculated, it is contemplated that calculated value is not necessarily integer value, therefore carries out value to be compressed according to the principle for rounding up
The magnetic pole logarithm p of electromechanical machine.If it should be noted that may be deposited using a calculated value as the magnetic pole logarithm of compressor electric motor
In certain contingency and unpredictability, therefore, computing module 30 can be carried out repeatedly to the magnetic pole logarithm of compressor electric motor
Calculating is averaged, for example, computing module 30 can calculate 10 times to average, is then carried out according still further to the principle for rounding up
Value to obtain the magnetic pole logarithm of compressor electric motor, so as to effectively improve the accuracy of the magnetic pole logarithm for obtaining compressor electric motor.
Below according to a specific example of the invention, the present invention will be further described.
In order to the accurate magnetic pole logarithm for obtaining compressor electric motor, as far as possible in the operating mode that compressor electric motor is relatively stable
Tested under (compressor electric motor is in closed loop states, and the rotor speed of compressor electric motor is basicly stable).Wherein, compressor is worked as
Motor is relatively low into speed ratio during closed loop states by open loop situations, it is assumed that now the magnetic pole logarithm of compressor electric motor is 3, and with
Magnetic pole logarithm 3 is controlled to compressor electric motor.It should be noted that the magnetic pole logarithm of the compressor electric motor generally in air-conditioner
It is 2 or 3, so during test, generally choosing such as 3 pairs compressor electric motors of larger magnetic pole logarithm and being controlled.
If the magnetic pole logarithm of the compressor electric motor of reality is 2, as shown in Fig. 2 now, it is out of service in compressor electric motor
Each alternating component existed before (three-phase current of compressor electric motor is zero) in alternating component, and DC voltage includes pressure
Two current cycles of contracting machine current of electric.It should be noted that in fig. 2, the three-phase current of compressor electric motor exists larger
Harmonic components, reason is that compensated torque is increased when compressor electric motor runs on low frequency state.
If the magnetic pole logarithm of the compressor electric motor of reality is 3, as shown in figure 3, now each friendship in DC voltage
Three current cycles of the stream composition comprising compressor electric motor electric current.
Filtration module 20 is filtered treatment to the DC voltage that acquisition module 10 is obtained to obtain DC voltage component,
Computing module 30 makes the difference the DC voltage of acquisition with the DC voltage component after filtering process, to obtain alternating voltage point
Amount, is then processed alternating current voltage component to obtain the first angular velocity omega by single-phase phase-locked loop 401。
From Fig. 2 and Fig. 3, the cycle of the electric current of compressor electric motor is change, i.e., according to two kinds of current cycles or three
Planting current cycle carries out cyclically-varying, and the angular rate of the stator of acquisition is also a changing value, accordingly, it would be desirable to stator
Angular rate carries out low-pass filtering treatment to obtain a stator angular speed for stabilization, the i.e. angular velocity omega of compressor electric motor0。
The first angular velocity omega that computing module 30 will be obtained1With the angular velocity omega of compressor electric motor0Bring above-mentioned formula (1) into
Calculated, then proceed to obtain the first angular velocity omega1With the angular velocity omega of compressor electric motor0, and bring above-mentioned formula (1) into and enter
Row is calculated, and is calculated altogether 10 times, and the results averaged that then computing module 30 will be calculated is carried out according still further to the principle for rounding up
Value is obtaining the magnetic pole logarithm p of compressor electric motor.
After the accurate magnetic pole logarithm p for obtaining compressor electric motor, the magnetic pole logarithm of pair compressor electric motor assumed is carried out
Update, so that compressor electric motor can run according to accurate Controlling model.
The computing device of the magnetic pole logarithm of compressor electric motor in air-conditioner according to embodiments of the present invention, sampling module is in pressure
DC voltage when the electromechanical machine of contracting runs on low frequency state to the frequency converter of compressor electric motor is sampled to obtain sampling electricity
Pressure, filtration module is filtered treatment to sampled voltage to obtain DC voltage component, and computing module is according to sampled voltage and directly
Stream component of voltage obtains alternating current voltage component, and single-phase phase-locked loop is processed alternating current voltage component to obtain the first angular speed,
The angular speed and the magnetic pole logarithm of the first angular speed calculation compressor electric motor of the compressor electric motor that computing module is obtained according to estimation.
Therefore, the computing device of the magnetic pole logarithm of compressor electric motor can accurately obtain compression electromechanics in the air-conditioner of the embodiment of the present invention
The magnetic pole logarithm of machine, realizes simply, cost being increased without extra, and reliability is high.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, must rather than the device or element for indicating or imply meaning
With specific orientation, with specific azimuth configuration and operation, therefore must be not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In the description of the invention, " multiple " is meant that at least two, such as two, three
It is individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be that machinery connects
Connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be in two elements
The connection in portion or two interaction relationships of element, unless otherwise clearly restriction.For one of ordinary skill in the art
For, can as the case may be understand above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be with
It is the first and second feature directly contacts, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be with office
Combined in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area
Art personnel can be tied the feature of the different embodiments or example described in this specification and different embodiments or example
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (8)
1. in a kind of air-conditioner the magnetic pole logarithm of compressor electric motor computational methods, it is characterised in that comprise the following steps：
S1, when the compressor electric motor runs on low frequency state, to the DC voltage of the frequency converter of the compressor electric motor
Sampled to obtain sampled voltage；
S2, treatment is filtered to the sampled voltage to obtain DC voltage component, and according to the sampled voltage and described
DC voltage component obtains alternating current voltage component；
S3, is processed the alternating current voltage component to obtain the first angular speed by single-phase phase-locked loop；And
S4, the compressor electric motor according to the angular speed and first angular speed calculation of estimating the compressor electric motor for obtaining
Magnetic pole logarithm, wherein, the magnetic pole logarithm of the compressor electric motor is calculated according to below equation：
Wherein, p is the magnetic pole logarithm of the compressor electric motor, ω0It is the angular speed of the compressor electric motor, ω1It is described first
Angular speed.
2. in air-conditioner as claimed in claim 1 the magnetic pole logarithm of compressor electric motor computational methods, it is characterised in that in step
In rapid S2, treatment is filtered to the sampled voltage by low-pass first order filter.
3. in air-conditioner as claimed in claim 2 the magnetic pole logarithm of compressor electric motor computational methods, it is characterised in that it is described
The cut-off frequency of low-pass first order filter is 8-12Hz.
4. in air-conditioner as claimed in claim 1 the magnetic pole logarithm of compressor electric motor computational methods, it is characterised in that in step
In rapid S4, the angular speed of the compressor electric motor is estimated by position-sensor-free.
5. in a kind of air-conditioner the magnetic pole logarithm of compressor electric motor computing device, it is characterised in that including：
Sampling module, the sampling module is used for when the compressor electric motor runs on low frequency state to the compressor electric motor
The DC voltage of frequency converter sampled to obtain sampled voltage；
Filtration module, the filtration module is used to be filtered the sampled voltage treatment to obtain DC voltage component；With
And
Computing module and single-phase phase-locked loop, the computing module are used to be obtained according to the sampled voltage and the DC voltage component
Alternating current voltage component is taken, and the single-phase phase-locked loop is used to the alternating current voltage component is processed to obtain the first angular speed,
Pressed described in the angular speed and first angular speed calculation of the compressor electric motor that the computing module is obtained always according to estimation
The magnetic pole logarithm of the electromechanical machine of contracting, wherein, the computing module calculates the magnetic pole logarithm of the compressor electric motor according to below equation：
Wherein, p is the magnetic pole logarithm of the compressor electric motor, ω0It is the angular speed of the compressor electric motor, ω1It is described first
Angular speed.
6. in air-conditioner as claimed in claim 5 the magnetic pole logarithm of compressor electric motor computing device, it is characterised in that it is described
Filtration module is low-pass first order filter, and the cut-off frequency of the low-pass first order filter is 8-12Hz.
7. in air-conditioner as claimed in claim 5 the magnetic pole logarithm of compressor electric motor computing device, it is characterised in that it is described
Computing module estimates the angular speed of the compressor electric motor by position-sensor-free.
8. in the air-conditioner as any one of claim 5-7 the magnetic pole logarithm of compressor electric motor computing device, it is special
Levy and be, the compressor is single-rotor compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510144727.1A CN104753429B (en) | 2015-03-30 | 2015-03-30 | The computational methods of the magnetic pole logarithm of compressor electric motor, device in air-conditioner |
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| CN201510144727.1A CN104753429B (en) | 2015-03-30 | 2015-03-30 | The computational methods of the magnetic pole logarithm of compressor electric motor, device in air-conditioner |
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| CN104753429A CN104753429A (en) | 2015-07-01 |
| CN104753429B true CN104753429B (en) | 2017-06-27 |
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| CN108964551B (en) * | 2018-07-12 | 2020-03-27 | 四川虹美智能科技有限公司 | Method and device for determining number of pole pairs of refrigerator compressor |
| CN108832861B (en) * | 2018-08-14 | 2020-06-16 | 四川虹美智能科技有限公司 | Compressor pole pair number identification method and device |
| CN109639201B (en) * | 2019-01-04 | 2020-04-07 | 四川虹美智能科技有限公司 | Motor pole pair identification method and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5796228A (en) * | 1996-09-04 | 1998-08-18 | Mitsubishi Denki Kabushiki Kaisha | Method of controlling rotary magnet multi-phase synchronous motor and control therefor |
| CN103944479A (en) * | 2014-04-09 | 2014-07-23 | 美的集团武汉制冷设备有限公司 | Method and device for recognizing number of pole pairs of compressor of air conditioner |
| CN104167959A (en) * | 2014-08-25 | 2014-11-26 | 广东美的制冷设备有限公司 | Method and device for determining number of pole pairs |
| CN104201943A (en) * | 2014-08-26 | 2014-12-10 | 广东美的制冷设备有限公司 | Determination method and device for number of pole pairs |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5796228A (en) * | 1996-09-04 | 1998-08-18 | Mitsubishi Denki Kabushiki Kaisha | Method of controlling rotary magnet multi-phase synchronous motor and control therefor |
| CN103944479A (en) * | 2014-04-09 | 2014-07-23 | 美的集团武汉制冷设备有限公司 | Method and device for recognizing number of pole pairs of compressor of air conditioner |
| CN104167959A (en) * | 2014-08-25 | 2014-11-26 | 广东美的制冷设备有限公司 | Method and device for determining number of pole pairs |
| CN104201943A (en) * | 2014-08-26 | 2014-12-10 | 广东美的制冷设备有限公司 | Determination method and device for number of pole pairs |
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