CN108092581A - Phase-voltage measurement method, apparatus, air conditioner and the medium of three-phase inverting circuit - Google Patents
Phase-voltage measurement method, apparatus, air conditioner and the medium of three-phase inverting circuit Download PDFInfo
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- CN108092581A CN108092581A CN201810032378.8A CN201810032378A CN108092581A CN 108092581 A CN108092581 A CN 108092581A CN 201810032378 A CN201810032378 A CN 201810032378A CN 108092581 A CN108092581 A CN 108092581A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
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Abstract
The present invention provides phase-voltage measurement method, apparatus, air conditioner and the medium of a kind of three-phase inverting circuit, method includes：Detect in power on holding state when, specific pulse bandwidth modulation signals are loaded onto three-phase inversion driving circuit, and the unloaded phase voltage sampled value of any phase is determined in loading procedure；Low-pass filtering operation is carried out to unloaded phase voltage sampled value, determines to calibrate the straggling parameter of the load phase voltage of each phase.By technical scheme, the straggling parameter generated by current circuit power factor can be effectively removed, and operand is smaller, and it is convenient to realize, also further improves the detection accuracy of load phase voltage, is conducive to the accurate control of air conditioner entirety.
Description
Technical field
The present invention relates to motor control technology field, in particular to a kind of phase-voltage measurement of three-phase inverting circuit
Method, a kind of phase-voltage measurement device of three-phase inverting circuit, a kind of air conditioner and a kind of computer readable storage medium.
Background technology
Widely used vector control algorithm in the compressor control field of air conditioner is, it is necessary to the output electricity of three-phase inverting circuit
The information such as stream, output voltage carry out vector and computing.
Correlation technique, output current generally carry out sampling using modes such as Hall sensor, single resistance/bis- resistance and determine,
The detection of phase voltage is exported generally by way of PWM reconstruct or hardware circuit samples two ways, there are following technological deficiencies：
(1) PWM (Pulse Width Modulation, pulse width modulation) reconstruct is a kind of indirect mode, and PWM is reconstructed
It is to carry out Equivalent Calculation according to per phase IGBT power switch service times, the cooperation of additional hardware circuit is not required, calculating is simple, but
Be Equivalent Calculation and reality output phase voltage there are certain delay and deviation, accuracy is poor.
(2) hardware circuit sample mode, sampled signal can in time, accurate response phase voltage, but transported in sample circuit
The components such as amplifier, analog-to-digital conversion sampling are calculated all there are error and offset, the phase voltage sampled is caused to there is centainly inclined
It moves, if without deviation calibration, accuracy can be caused poor, influence air conditioner control accuracy and effect.
The content of the invention
It is contemplated that at least solve one of technical problem present in the prior art or correlation technique.
For this purpose, a kind of phase-voltage measurement method it is an object of the present invention to provide three-phase inverting circuit.
It is another object of the present invention to provide a kind of phase-voltage measurement devices of three-phase inverting circuit.
It is yet a further object of the present invention to provide a kind of air conditioners.
A further object of the present invention is to provide a kind of computer readable storage medium.
To achieve these goals, the technical solution of the first aspect of the present invention provides a kind of phase of three-phase inverting circuit
Voltage detection method, including：Detect in power on holding state when, specific pulse bandwidth modulation signals are loaded onto three-phase
Inverse changing driving circuit, and in loading procedure determine any phase unloaded phase voltage sampled value；To unloaded phase voltage sampled value into
Row low-pass filtering operation determines to calibrate the straggling parameter of the load phase voltage of each phase.
In the technical scheme, by detect in power on holding state when, by specific pulse bandwidth modulation signals
Three-phase inversion driving circuit is loaded onto, is conducive to determine the unloaded phase voltage sampled value of any phase in loading procedure, by right
Unloaded phase voltage sampled value carries out low-pass filtering operation, determines to calibrate the straggling parameter of the load phase voltage of each phase, partially
The definite of poor parameter is more accurately conducive to be promoted the detection accuracy of load phase voltage, and then is conducive to promote air conditioner control
The accuracy of system.
Specifically, specific pulse bandwidth modulation signals are the carrier signals that duty cycle is 50%, and carrier frequency can be
5kHz is loaded onto three-phase inversion driving circuit namely three-phase bridge driving circuit, and U phases, V phases, the upper and lower bridge arm of W phases are according to finger
Determine pulse width modulating signal break-make, so that the AD analog-to-digital conversion modules output reading of phase voltage sample circuit connection, with sampling
Exemplified by scope is 12 AD analog-to-digital conversion module of 0-3.3V, the scope of the reading resultA of AD analog-to-digital conversion modules sampling is
0-4096, the scope of corresponding virtual voltage is 0-Ufull, AD analog-to-digital conversion modules sampling reading adc_resultA0It then determines to include
The unloaded phase voltage sampled value U of straggling parameter0=adc_resultA0×Ufull/ 4096 ought use different AD analog-to-digital conversion moulds
During block, corresponding parameter in corresponding variation above formula.
In the above-mentioned technical solutions, it is preferable that low-pass filtering operation is carried out to unloaded phase voltage sampled value, is determined for school
The straggling parameter of the load phase voltage of accurate each phase, including：Determine each phase having time in corresponding default prover time
Carry phase voltage sampled value；According to the first preset formula, unloaded phase voltage sampled value is sequentially input, iterative cycles calculate, to carry out
Low-pass filtering, and by final iterative calculation as a result, being determined as the straggling parameter of corresponding phase, the first preset formula is： bias(n)
=a × U0(n)+(1-a) × bias (n-1), wherein, bias (n) is characterized as the straggling parameter that nth iteration calculates, n characterizations
For iterations, n≤1, a are characterized as preset constant, U0(n) it is characterized as n-th unloaded phase voltage sampled value.
In the technical scheme, by determining that all unloaded phase voltages of each phase in corresponding default prover time are adopted
Sample value, the definite of straggling parameter for corresponding phase provide data foundation, wherein, every millisecond of sampling reading in default prover time
One adc_resultA of number0, preset and multiple unloaded phase voltage sampled values determined in prover time, by default according to first
Formula sequentially inputs unloaded phase voltage sampled value, and iterative cycles calculate, and to carry out low-pass filtering, and will finally iterate to calculate knot
Fruit is determined as the straggling parameter of corresponding phase, realizes determining for straggling parameter, and straggling parameter is multiple in prover time by presetting
Iteration determines unloaded phase voltage sampled value successively, more applicability, and more accurately, the detection for being conducive to be promoted load phase voltage is accurate
True property, and then be conducive to be promoted the accuracy of air conditioner control.
It should be noted that preset constant a is determined by cutoff frequency, and cutoff frequency is according to Rated motor frequency range
Accordingly select it is default, such as Rated motor peak frequency be 450Hz, then cutoff frequency can select to be preset as 600Hz, and cut
Only frequency fl and the relation of preset constant a areT is default sampling period 1-5 millisecond.
In any of the above-described technical solution, it is preferable that default prover time is 3s-5s.
In the technical scheme, it is 3s-5s by default prover time, on the one hand, have the unloaded phase voltage more than comparison to adopt
Sample value data are conducive to be promoted the definite accuracy of straggling parameter, on the other hand, it is long and influence to reduce default prover time
The definite efficiency of straggling parameter.
In any of the above-described technical solution, it is preferable that when detecting in machine operating condition, according to default sampling
Cycle samples the load phase voltage sampled value of definite each phase respectively；According to straggling parameter, each corresponding load phase is calibrated
Voltage sample value is determined as corresponding load phase voltage detected value.
In the technical scheme, by when detecting in machine operating condition, being adopted respectively according to the default sampling period
Sample determines the load phase voltage sampled value of each phase, afterwards according to straggling parameter, calibrates each corresponding load phase voltage and adopts
Sample value is determined as corresponding load phase voltage detected value, can effectively remove the straggling parameter generated by current circuit power factor, and
And operand is smaller, it is convenient to realize, also further improves the detection accuracy of load phase voltage, is conducive to air conditioner entirety
Accurate control.
It should be noted that load phase voltage sampled value is after motor operates a period of time, steady timing determination is operated.
In any of the above-described technical solution, it is preferable that according to straggling parameter, calibrate each corresponding load phase voltage
Sampled value is determined as corresponding load phase voltage detected value, including：According to the second preset formula, according to straggling parameter and load
Phase voltage sampled value, computational load phase-voltage measurement value, the second preset formula are：Vi=Ui-biasi(n), wherein, ViIt is characterized as
The phase-voltage measurement value of i-th phase, UiIt is characterized as the load phase voltage sampled value of the i-th phase, biasi(n) it is characterized as the n-th of the i-th phase
The secondary straggling parameter iterated to calculate out.
In the technical scheme, by according to the second preset formula, according to straggling parameter and load phase voltage sampled value, counting
Load phase voltage detected value is calculated, the second preset formula is：Vi=Ui-biasi(n), can effectively remove because current circuit power factor produces
Raw straggling parameter, and operand is smaller, and it is convenient to realize, also further improves the detection accuracy of load phase voltage, has
Beneficial to the accurate control of air conditioner entirety.
It should be noted that the reading in 12 AD analog-to-digital conversion modules sampling that sample range is 0-3.3V is adc_
resultAiWhen, Ui=adc_resultAi×Ufull/4096。
The technical solution of the second aspect of the present invention proposes a kind of phase-voltage measurement device of three-phase inverting circuit, bag
It includes：Loading unit, for detect in power on holding state when, specific pulse bandwidth modulation signals are loaded onto three contraries
Become driving circuit, and the unloaded phase voltage sampled value of any phase is determined in loading procedure；Determination unit, for unloaded mutually electricity
Sampled value is pressed to carry out low-pass filtering operation, determines to calibrate the straggling parameter of the load phase voltage of each phase.
In the technical scheme, by detect in power on holding state when, by specific pulse bandwidth modulation signals
Three-phase inversion driving circuit is loaded onto, is conducive to determine the unloaded phase voltage sampled value of any phase in loading procedure, by right
Unloaded phase voltage sampled value carries out low-pass filtering operation, determines to calibrate the straggling parameter of the load phase voltage of each phase, partially
The definite of poor parameter is more accurately conducive to be promoted the detection accuracy of load phase voltage, and then is conducive to promote air conditioner control
The accuracy of system.
Specifically, specific pulse bandwidth modulation signals are the carrier signals that duty cycle is 50%, and carrier frequency can be
5kHz is loaded onto three-phase inversion driving circuit namely three-phase bridge driving circuit, and U phases, V phases, the upper and lower bridge arm of W phases are according to finger
Determine pulse width modulating signal break-make, so that the AD analog-to-digital conversion modules output reading of phase voltage sample circuit connection, with sampling
Exemplified by scope is 12 AD analog-to-digital conversion module of 0-3.3V, the scope of the reading resultA of AD analog-to-digital conversion modules sampling is
0-4096, the scope of corresponding virtual voltage is 0-Ufull, AD analog-to-digital conversion modules sampling reading adc_resultA0It then determines to include
The unloaded phase voltage sampled value U of straggling parameter0=adc_resultA0×Ufull/ 4096 ought use different AD analog-to-digital conversion moulds
During block, corresponding parameter in corresponding variation above formula.
In the above-mentioned technical solutions, it is preferable that determination unit is additionally operable to：Determine each phase in corresponding default prover time
Interior all unloaded phase voltage sampled values；Determination unit is additionally operable to：According to the first preset formula, sequentially input unloaded phase voltage and adopt
Sample value, iterative cycles calculate, to carry out low-pass filtering, and will final iterative calculation as a result, be determined as the straggling parameter of corresponding phase,
First preset formula is：Bias (n)=a × U0(n)+(1-a) × bias (n-1), wherein, bias (n) is characterized as n-th and changes
The straggling parameter that generation calculates, n are characterized as iterations, n≤1, and a is characterized as preset constant, U0(n) it is characterized as n-th zero load
Phase voltage sampled value.
In the technical scheme, by determining that all unloaded phase voltages of each phase in corresponding default prover time are adopted
Sample value, the definite of straggling parameter for corresponding phase provide data foundation, wherein, every millisecond of sampling reading in default prover time
One adc_resultA of number0, preset and multiple unloaded phase voltage sampled values determined in prover time, by default according to first
Formula sequentially inputs unloaded phase voltage sampled value, and iterative cycles calculate, and to carry out low-pass filtering, and will finally iterate to calculate knot
Fruit is determined as the straggling parameter of corresponding phase, realizes determining for straggling parameter, and straggling parameter is multiple in prover time by presetting
Iteration determines unloaded phase voltage sampled value successively, more applicability, and more accurately, the detection for being conducive to be promoted load phase voltage is accurate
True property, and then be conducive to be promoted the accuracy of air conditioner control.
It should be noted that preset constant a is determined by cutoff frequency, and cutoff frequency is according to Rated motor frequency range
Accordingly select it is default, such as Rated motor peak frequency be 450Hz, then cutoff frequency can select to be preset as 600Hz, and cut
Only frequency fl and the relation of preset constant a areT is default sampling period 1-5 millisecond.
In any of the above-described technical solution, it is preferable that default prover time is 3s-5s.
In the technical scheme, it is 3s-5s by default prover time, on the one hand, have the unloaded phase voltage more than comparison to adopt
Sample value data are conducive to be promoted the definite accuracy of straggling parameter, on the other hand, it is long and influence to reduce default prover time
The definite efficiency of straggling parameter.
In any of the above-described technical solution, it is preferable that determination unit is additionally operable to：Machine operating condition is in when detecting
When, sample the load phase voltage sampled value of definite each phase respectively according to the default sampling period；Phase-voltage measurement device further includes：
Alignment unit, for according to straggling parameter, calibrating each corresponding load phase voltage sampled value, being determined as corresponding load phase
Voltage detecting value.
In the technical scheme, by when detecting in machine operating condition, being adopted respectively according to the default sampling period
Sample determines the load phase voltage sampled value of each phase, afterwards according to straggling parameter, calibrates each corresponding load phase voltage and adopts
Sample value is determined as corresponding load phase voltage detected value, can effectively remove the straggling parameter generated by current circuit power factor, and
And operand is smaller, it is convenient to realize, also further improves the detection accuracy of load phase voltage, is conducive to air conditioner entirety
Accurate control.
It should be noted that load phase voltage sampled value is after motor operates a period of time, steady timing determination is operated.
In any of the above-described technical solution, it is preferable that further include：Computing unit, for according to the second preset formula, root
According to straggling parameter and load phase voltage sampled value, computational load phase-voltage measurement value, the second preset formula is：Vi=Ui-biasi
(n), wherein, ViIt is characterized as the phase-voltage measurement value of the i-th phase, UiIt is characterized as the load phase voltage sampled value of the i-th phase, biasi(n)
It is characterized as the straggling parameter that the nth iteration of the i-th phase calculates.
In the technical scheme, by according to the second preset formula, according to straggling parameter and load phase voltage sampled value, counting
Load phase voltage detected value is calculated, the second preset formula is：Vi=Ui-biasi(n), can effectively remove because current circuit power factor produces
Raw straggling parameter, and operand is smaller, and it is convenient to realize, also further improves the detection accuracy of load phase voltage, has
Beneficial to the accurate control of air conditioner entirety.
It should be noted that the reading in 12 AD analog-to-digital conversion modules sampling that sample range is 0-3.3V is adc_
resultAiWhen, Ui=adc_resultAi×Ufull/4096。
The technical solution of the third aspect of the present invention proposes a kind of air conditioner, and air conditioner includes processor, and processor is used
It is realized when the computer program stored in memory is performed as what the technical solution of above-mentioned the first aspect of the present invention proposed appoints
The step of phase-voltage measurement method of the three-phase inverting circuit of one；And/or the technology of the second aspect including the invention described above
The phase-voltage measurement device of the three-phase inverting circuit for any one that scheme proposes.
In the technical scheme, air conditioner includes processor, and processor is used to perform the computer journey stored in memory
The phase voltage inspection of the three-phase inverting circuit of any one proposed such as the technical solution of above-mentioned the first aspect of the present invention is realized during sequence
The three-phase inverting circuit for any one that the technical solution of the step of survey method and/or second aspect including the invention described above proposes
Phase-voltage measurement device, therefore with the invention described above first aspect technical solution propose any one three-phase inversion
What the technical solution of whole advantageous effects of the phase-voltage measurement method of circuit and/or the second aspect of the invention described above proposed appoints
Whole advantageous effects of the phase-voltage measurement device of the three-phase inverting circuit of one, details are not described herein.
The technical solution of the fourth aspect of the present invention proposes a kind of computer readable storage medium, is stored thereon with calculating
Machine program realizes the three of any one that the technical solution of the first aspect of the present invention proposes when computer program is executed by processor
The step of phase-voltage measurement method of phase inverter circuit.
In the technical scheme, computer readable storage medium, is stored thereon with computer program, and computer program is located
Reason device realizes the phase voltage inspection of the three-phase inverting circuit for any one that the technical solution of the first aspect of the present invention proposes when performing
The step of survey method, therefore the three-phase inverting circuit of any one of the technical solution proposition of the first aspect with the invention described above
Phase-voltage measurement method whole advantageous effects, details are not described herein.
By above technical scheme, detect in power on holding state when namely motor operating before, determine for school
The straggling parameter of the load phase voltage of accurate each phase, when detecting in machine operating condition, with load phase voltage sampled value
It subtracts straggling parameter and is determined as load phase voltage detected value, the straggling parameter generated by current circuit power factor can be effectively removed,
And operand is smaller, and it is convenient to realize, also further improves the detection accuracy of load phase voltage, is conducive to air conditioner entirety
Accurate control.
The additional aspect and advantage of the present invention will provide in following description section, will partly become from the following description
It obtains substantially or is recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 shows the signal stream of the phase-voltage measurement method of three-phase inverting circuit according to an embodiment of the invention
Cheng Tu；
Fig. 2 shows the schematic block of the phase-voltage measurement device of three-phase inverting circuit according to an embodiment of the invention
Figure；
Fig. 3 shows the schematic block diagram of air conditioner according to an embodiment of the invention；
Fig. 4 shows the structure diagram of three-phase inverting circuit according to an embodiment of the invention；
Fig. 5 shows according to an embodiment of the invention according to specific pulse bandwidth modulation signals driving three-phase inversion
The waveform diagram in three-phase output during the break-make of the bridge arm of each phase of circuit；
Fig. 6 shows the signal of the phase-voltage measurement method of three-phase inverting circuit according to another embodiment of the invention
Flow chart.
Specific embodiment
It is to better understand the objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specific real
Mode is applied the present invention is further described in detail.It should be noted that in the case where there is no conflict, the implementation of the application
Feature in example and embodiment can be mutually combined.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
To be implemented using other different from other modes described here, therefore, protection scope of the present invention and from described below
Specific embodiment limitation.
Fig. 1 shows the signal stream of the phase-voltage measurement method of three-phase inverting circuit according to an embodiment of the invention
Cheng Tu.
As shown in Figure 1, the phase-voltage measurement method of three-phase inverting circuit according to an embodiment of the invention, including：
S102, detect in power on holding state when, specific pulse bandwidth modulation signals are loaded onto three-phase inversion
Driving circuit, and in loading procedure determine any phase unloaded phase voltage sampled value；
S104 carries out low-pass filtering operation to unloaded phase voltage sampled value, and the load for determining to calibrate each phase is mutually electric
The straggling parameter of pressure.
In this embodiment, by detect in power on holding state when, specific pulse bandwidth modulation signals are added
Three-phase inversion driving circuit is loaded onto, is conducive to determine the unloaded phase voltage sampled value of any phase in loading procedure, by sky
It carries phase voltage sampled value and carries out low-pass filtering operation, determine to calibrate the straggling parameter of the load phase voltage of each phase, deviation
The definite of parameter is more accurately conducive to be promoted the detection accuracy of load phase voltage, and then is conducive to promote air conditioner control
Accuracy.
Specifically, specific pulse bandwidth modulation signals are the carrier signals that duty cycle is 50%, and carrier frequency can be
5kHz is loaded onto three-phase inversion driving circuit namely three-phase bridge driving circuit, and U phases, V phases, the upper and lower bridge arm of W phases are according to finger
Determine pulse width modulating signal break-make, so that the AD analog-to-digital conversion modules output reading of phase voltage sample circuit connection, with sampling
Exemplified by scope is 12 AD analog-to-digital conversion module of 0-3.3V, the scope of the reading resultA of AD analog-to-digital conversion modules sampling is
0-4096, the scope of corresponding virtual voltage is 0-Ufull, AD analog-to-digital conversion modules sampling reading adc_resultA0It then determines to include
The unloaded phase voltage sampled value U of straggling parameter0=adc_resultA0×Ufull/ 4096 ought use different AD analog-to-digital conversion moulds
During block, corresponding parameter in corresponding variation above formula.
In the above embodiment, it is preferable that carrying out low-pass filtering operation to unloaded phase voltage sampled value, determine to calibrate
The straggling parameter of the load phase voltage of each phase, including：Determine all zero loads of each phase in corresponding default prover time
Phase voltage sampled value；According to the first preset formula, unloaded phase voltage sampled value is sequentially input, iterative cycles calculate, low to carry out
Pass filter, and by final iterative calculation as a result, being determined as the straggling parameter of corresponding phase, the first preset formula is：Bias (n)=a
×U0(n)+(1-a) × bias (n-1), wherein, bias (n) is characterized as the straggling parameter that nth iteration calculates, and n is characterized as
Iterations, n≤1, a are characterized as preset constant, U0(n) it is characterized as n-th unloaded phase voltage sampled value.
In this embodiment, by determining that all unloaded phase voltages of each phase in corresponding default prover time sample
Value, the definite of straggling parameter for corresponding phase provide data foundation, wherein, every millisecond of sampling reading in default prover time
One adc_resultA0, preset and multiple unloaded phase voltage sampled values determined in prover time, by according to the first default public affairs
Formula, sequentially inputs unloaded phase voltage sampled value, and iterative cycles calculate, to carry out low-pass filtering, and will finally iterate to calculate as a result,
It is determined as the straggling parameter of corresponding phase, realizes determining for straggling parameter, straggling parameter is by presetting multiple skies in prover time
Carrying phase voltage sampled value, iteration determines successively, more applicability, and more accurately, the detection for being conducive to be promoted load phase voltage is accurate
Property, and then be conducive to be promoted the accuracy of air conditioner control.
It should be noted that preset constant a is determined by cutoff frequency, and cutoff frequency is according to Rated motor frequency range
Accordingly select it is default, such as Rated motor peak frequency be 450Hz, then cutoff frequency can select to be preset as 600Hz, and cut
Only frequency fl and the relation of preset constant a areT is default sampling period 1-5 millisecond.
In any of the above-described embodiment, it is preferable that default prover time is 3s-5s.
In this embodiment, it is 3s-5s by default prover time, on the one hand, have the unloaded phase voltage sampling more than comparison
Value Data is conducive to be promoted the definite accuracy of straggling parameter, on the other hand, it is long and influence inclined to reduce default prover time
The definite efficiency of poor parameter.
In any of the above-described embodiment, it is preferable that when detecting in machine operating condition, according to default sampling week
Phase samples the load phase voltage sampled value of definite each phase respectively；According to straggling parameter, each corresponding load of calibration is mutually electric
Sampled value is pressed, is determined as corresponding load phase voltage detected value.
In this embodiment, by when detecting in machine operating condition, being sampled respectively according to the default sampling period
The load phase voltage sampled value of each phase is determined, afterwards according to straggling parameter, each corresponding load phase voltage sampling of calibration
Value, is determined as corresponding load phase voltage detected value, can effectively remove the straggling parameter generated by current circuit power factor, and
Operand is smaller, and it is convenient to realize, also further improves the detection accuracy of load phase voltage, is conducive to the essence of air conditioner entirety
Really control.
It should be noted that load phase voltage sampled value is after motor operates a period of time, steady timing determination is operated.
In any of the above-described embodiment, it is preferable that according to straggling parameter, calibrate each corresponding load phase voltage and adopt
Sample value is determined as corresponding load phase voltage detected value, including：According to the second preset formula, according to straggling parameter and load phase
Voltage sample value, computational load phase-voltage measurement value, the second preset formula are：Vi=Ui-biasi(n), wherein, ViIt is characterized as
The phase-voltage measurement value of i phases, UiIt is characterized as the load phase voltage sampled value of the i-th phase, biasi(n) n-th for being characterized as the i-th phase changes
The straggling parameter that generation calculates.
In this embodiment, by according to the second preset formula, according to straggling parameter and load phase voltage sampled value, calculating
Load phase voltage detected value, the second preset formula are：Vi=Ui-biasi(n), can effectively remove because current circuit power factor generates
Straggling parameter, and operand is smaller, and it is convenient to realize, also further improves the detection accuracy of load phase voltage, favorably
In the accurate control of air conditioner entirety.
It should be noted that the reading in 12 AD analog-to-digital conversion modules sampling that sample range is 0-3.3V is adc_
resultAiWhen, Ui=adc_resultAi×Ufull/4096。
Fig. 2 shows showing for the phase-voltage measurement device 200 of three-phase inverting circuit according to an embodiment of the invention
Meaning block diagram.
As shown in Fig. 2, the phase-voltage measurement device 200 of three-phase inverting circuit according to an embodiment of the invention, including：Add
Carrier unit 202, for detect in power on holding state when, specific pulse bandwidth modulation signals are loaded onto three-phase inversion
Driving circuit, and in loading procedure determine any phase unloaded phase voltage sampled value；Determination unit 204, for unloaded phase
Voltage sample value carries out low-pass filtering operation, determines to calibrate the straggling parameter of the load phase voltage of each phase.
In this embodiment, by detect in power on holding state when, specific pulse bandwidth modulation signals are added
Three-phase inversion driving circuit is loaded onto, is conducive to determine the unloaded phase voltage sampled value of any phase in loading procedure, by sky
It carries phase voltage sampled value and carries out low-pass filtering operation, determine to calibrate the straggling parameter of the load phase voltage of each phase, deviation
The definite of parameter is more accurately conducive to be promoted the detection accuracy of load phase voltage, and then is conducive to promote air conditioner control
Accuracy.
Specifically, specific pulse bandwidth modulation signals are the carrier signals that duty cycle is 50%, and carrier frequency can be
5kHz is loaded onto three-phase inversion driving circuit namely three-phase bridge driving circuit, and U phases, V phases, the upper and lower bridge arm of W phases are according to finger
Determine pulse width modulating signal break-make, so that the AD analog-to-digital conversion modules output reading of phase voltage sample circuit connection, with sampling
Exemplified by scope is 12 AD analog-to-digital conversion module of 0-3.3V, the scope of the reading resultA of AD analog-to-digital conversion modules sampling is
0-4096, the scope of corresponding virtual voltage is 0-Ufull, AD analog-to-digital conversion modules sampling reading adc_resultA0It then determines to include
The unloaded phase voltage sampled value U of straggling parameter0=adc_resultA0×Ufull/ 4096 ought use different AD analog-to-digital conversion moulds
During block, corresponding parameter in corresponding variation above formula.
In the above embodiment, it is preferable that determination unit 204 is additionally operable to：Determine each phase in corresponding default calibration
Interior all unloaded phase voltage sampled values；Determination unit 204 is additionally operable to：According to the first preset formula, unloaded phase is sequentially input
Voltage sample value, iterative cycles calculate, to carry out low-pass filtering, and by final iterative calculation as a result, being determined as the inclined of corresponding phase
Poor parameter, the first preset formula are：Bias (n)=a × U0(n)+(1-a) × bias (n-1), wherein, bias (n) is characterized as
The straggling parameter that n times iterate to calculate out, n are characterized as iterations, n≤1, and a is characterized as preset constant, U0(n) it is characterized as n-th
Unloaded phase voltage sampled value.
In this embodiment, by determining that all unloaded phase voltages of each phase in corresponding default prover time sample
Value, the definite of straggling parameter for corresponding phase provide data foundation, wherein, every millisecond of sampling reading in default prover time
One adc_resultA0, preset and multiple unloaded phase voltage sampled values determined in prover time, by according to the first default public affairs
Formula, sequentially inputs unloaded phase voltage sampled value, and iterative cycles calculate, to carry out low-pass filtering, and will finally iterate to calculate as a result,
It is determined as the straggling parameter of corresponding phase, realizes determining for straggling parameter, straggling parameter is by presetting multiple skies in prover time
Carrying phase voltage sampled value, iteration determines successively, more applicability, and more accurately, the detection for being conducive to be promoted load phase voltage is accurate
Property, and then be conducive to be promoted the accuracy of air conditioner control.
It should be noted that preset constant a is determined by cutoff frequency, and cutoff frequency is according to Rated motor frequency range
Accordingly select it is default, such as Rated motor peak frequency be 450Hz, then cutoff frequency can select to be preset as 600Hz, and cut
Only frequency fl and the relation of preset constant a areT is default sampling period 1-5 millisecond.
In any of the above-described embodiment, it is preferable that default prover time is 3s-5s.
In this embodiment, it is 3s-5s by default prover time, on the one hand, have the unloaded phase voltage sampling more than comparison
Value Data is conducive to be promoted the definite accuracy of straggling parameter, on the other hand, it is long and influence inclined to reduce default prover time
The definite efficiency of poor parameter.
In any of the above-described embodiment, it is preferable that determination unit 204 is additionally operable to：When detecting shape is operated in motor
During state, the load phase voltage sampled value of definite each phase is sampled respectively according to the default sampling period；Phase-voltage measurement device 200 is also
Including：Alignment unit 206, for according to straggling parameter, calibrating each corresponding load phase voltage sampled value, being determined as corresponding to
Load phase voltage detected value.
In this embodiment, by when detecting in machine operating condition, being sampled respectively according to the default sampling period
The load phase voltage sampled value of each phase is determined, afterwards according to straggling parameter, each corresponding load phase voltage sampling of calibration
Value, is determined as corresponding load phase voltage detected value, can effectively remove the straggling parameter generated by current circuit power factor, and
Operand is smaller, and it is convenient to realize, also further improves the detection accuracy of load phase voltage, is conducive to the essence of air conditioner entirety
Really control.
It should be noted that load phase voltage sampled value is after motor operates a period of time, steady timing determination is operated.
In any of the above-described embodiment, it is preferable that further include：Computing unit 208, for according to the second preset formula,
According to straggling parameter and load phase voltage sampled value, computational load phase-voltage measurement value, the second preset formula is：Vi=Ui-
biasi(n), wherein, ViIt is characterized as the phase-voltage measurement value of the i-th phase, UiThe load phase voltage sampled value of the i-th phase is characterized as,
biasi(n) it is characterized as the straggling parameter that the nth iteration of the i-th phase calculates.
In this embodiment, by according to the second preset formula, according to straggling parameter and load phase voltage sampled value, calculating
Load phase voltage detected value, the second preset formula are：Vi=Ui-biasi(n), can effectively remove because current circuit power factor generates
Straggling parameter, and operand is smaller, and it is convenient to realize, also further improves the detection accuracy of load phase voltage, favorably
In the accurate control of air conditioner entirety.
It should be noted that the reading in 12 AD analog-to-digital conversion modules sampling that sample range is 0-3.3V is adc_
resultAiWhen, Ui=adc_resultAi×Ufull/4096。
Fig. 3 shows the schematic block diagram of air conditioner 300 according to an embodiment of the invention.
As shown in figure 3, air conditioner 300 according to an embodiment of the invention, proposes including embodiments of the invention described above
The phase-voltage measurement device 200 of the three-phase inverting circuit of any one.
In this embodiment, air conditioner 300 includes the three-phase inversion electricity for any one that embodiments of the invention described above propose
The phase-voltage measurement device 200 on road, therefore the three-phase inverting circuit of any one with embodiments of the invention described above proposition
Whole advantageous effects of phase-voltage measurement device 200, details are not described herein.
Computer readable storage medium according to an embodiment of the invention is stored thereon with computer program, computer journey
The phase-voltage measurement of the three-phase inverting circuit for any one that embodiments of the invention described above propose is realized when sequence is executed by processor
The step of method.
In this embodiment, computer readable storage medium, is stored thereon with computer program, and computer program is processed
The step of the phase-voltage measurement method of the three-phase inverting circuit for any one that embodiments of the invention described above propose is realized when device performs
Suddenly, thus with embodiments of the invention described above propose any one three-phase inverting circuit phase-voltage measurement method whole
Advantageous effect, details are not described herein.
Fig. 4 shows the structure diagram of three-phase inverting circuit according to an embodiment of the invention；
Fig. 5 shows according to an embodiment of the invention according to specific pulse bandwidth modulation signals driving three-phase inversion
The waveform diagram in three-phase output during the break-make of the bridge arm of each phase of circuit；
Fig. 6 shows the signal of the phase-voltage measurement method of three-phase inverting circuit according to another embodiment of the invention
Flow chart.
As shown in Figures 4 to 6, the phase-voltage measurement side of three-phase inverting circuit according to another embodiment of the invention
Method, including：
S602, system electrification start straggling parameter calibration；
Specifically, three-phase inverting circuit as shown in Figure 4 powers on, but motor is inoperative,
S602, upper and lower bridge arm T1/T4, T2/T5, T3/T6 of three-phase lead to duty cycle 50%PWM respectively；
Specifically, as shown in figure 4, control chip output 50%PWM namely the pulse width modulation that duty cycle is 50% are believed
Number, PWM frequency is carrier frequency, such as 5kHz, drives the three-phase bridge driving circuit 402 namely three-phase of three-phase inverting circuit
Inverse changing driving circuit, three-phase bridge driving circuit 402 are made of power switch pipe, and power switch pipe is respectively T1/T4, T2/
T5, T3/T6, for example be made of or by 6 MOSFET Metal-Oxide Semiconductor 6 IGBT insulated gate bipolar transistors
Field-effect transistor forms or intelligent power module, and three-phase phase voltage sample circuit 404 is by partial pressure and filter circuit group
Into, wherein, R1, R2 composition bleeder circuit, and RC filter circuits are formed with C1, as A point phase voltage sample circuits, R3, R4 group
RC filter circuits are formed into bleeder circuit, and with C2, as B point phase voltage sample circuits, R5, R6 composition bleeder circuit, and with
C3 forms RC filter circuits, and as C point phase voltage sample circuits, upper and lower bridge arm T1/T4, T2/T5, T3/T6 of three-phase lead to respectively
During duty cycle 50%PWM, A points, B points, C points generate amplitude as Vdc respectively, and duty cycle is 50% square wave, as shown in figure 5, three
Mutually the square wave of output enters by respective phase voltage sample circuit controls the A/D module of chip to be sampled,
S606, Va/Vb/Vc carry out A/D module sampling U respectively0=adc_resultA0×Ufull/4096；
Specifically, A/D module is 12, and maximum sampling logarithm 212 is 4096, corresponding virtual voltage Ufull,
S608 calculates straggling parameter by first-order low-pass ripple；
Specifically, bias (n)=a × U0(n)+(1-a) × bias (n-1),
S610 judges whether that reaching straggling parameter presets prover time 5S；
If the judgement to S610 is yes, S612 is performed, calculates the straggling parameter Bias of each phasea(n)、Biasb
(n)、Biasc(n)；
S614, motor start to rotate, and calculate phase-voltage measurement value
Va=adc_resultAa×Ufull/4096-Biasa(n)
Vb=adc_resultAb×Ufull/4096-Biasb(n)
Vc=adc_resultAc×Ufull/4096-Biasc(n)；
If the judgement to S610 is no, S604 is performed.
Technical scheme is described in detail above in association with attached drawing, the present invention proposes a kind of three-phase inverting circuit
It phase-voltage measurement method, a kind of phase-voltage measurement device of three-phase inverting circuit, a kind of air conditioner and a kind of computer-readable deposits
Storage media, by detect in power on holding state when namely motor operating before, determine to calibrate the load of each phase
When detecting in machine operating condition, it is true to subtract straggling parameter with load phase voltage sampled value for the straggling parameter of phase voltage
It is set to load phase voltage detected value, the straggling parameter generated by current circuit power factor can be effectively removed, and operand is smaller,
It is convenient to realize, also further improves the detection accuracy of load phase voltage, is conducive to the accurate control of air conditioner entirety.
Step in the method for the present invention can be sequentially adjusted, combined, and deleted according to actual needs.
Unit in apparatus of the present invention can be combined, divided and deleted according to actual needs.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
Relevant hardware to be instructed to complete by program, which can be stored in a computer readable storage medium, storage
Medium include read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory,
RAM), programmable read only memory (Programmable Read-only Memory, PROM), erasable programmable is read-only deposits
Reservoir (Erasable Programmable Read Only Memory, EPROM), disposable programmable read-only memory (One-
Time Programmable Read-Only Memory, OTPROM), the electronics formula of erasing can make carbon copies read-only memory
(Electrically-Erasable Programmable Read-Only Memory, EEPROM), read-only optical disc (Compact
Disc Read-Only Memory, CD-ROM) or other disk storages, magnetic disk storage, magnetic tape storage or can
For carrying or storing any other computer-readable medium of data.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (12)
1. a kind of phase-voltage measurement method of three-phase inverting circuit, which is characterized in that including：
Detect in power on holding state when, specific pulse bandwidth modulation signals are loaded onto three-phase inversion driving circuit,
And the unloaded phase voltage sampled value of any phase is determined in the loading procedure；
Low-pass filtering operation is carried out to the unloaded phase voltage sampled value, determines to calibrate the inclined of the load phase voltage of each phase
Poor parameter.
2. the phase-voltage measurement method of three-phase inverting circuit according to claim 1, which is characterized in that described to the sky
It carries phase voltage sampled value and carries out low-pass filtering operation, determine to calibrate the straggling parameter of the load phase voltage of each phase, including：
Determine all unloaded phase voltage sampled values of each phase in corresponding default prover time；
According to the first preset formula, the unloaded phase voltage sampled value is sequentially input, iterative cycles calculate, to carry out low pass filtered
Ripple, and will final iterative calculation as a result, be determined as the straggling parameter of corresponding phase,
First preset formula is：Bias (n)=a × U0(n)+(1-a) × bias (n-1),
Wherein, the bias (n) is characterized as the straggling parameter that nth iteration calculates, and the n is characterized as iterations, n
≤ 1, a are characterized as preset constant, the U0(n) it is characterized as n-th of unloaded phase voltage sampled value.
3. the phase-voltage measurement method of three-phase inverting circuit according to claim 2, which is characterized in that
The default prover time is 3s-5s.
4. the phase-voltage measurement method of three-phase inverting circuit according to any one of claim 1 to 3, which is characterized in that
It further includes：
When detecting in machine operating condition, the load phase voltage of definite each phase is sampled respectively according to the default sampling period
Sampled value；
According to the straggling parameter, each corresponding load phase voltage sampled value is calibrated, is determined as corresponding negative
Carry phase-voltage measurement value.
5. the phase-voltage measurement method of three-phase inverting circuit according to claim 4, which is characterized in that described in the basis
Straggling parameter calibrates each corresponding load phase voltage sampled value, is determined as corresponding load phase voltage detection
Value, including：
According to the second preset formula, according to the straggling parameter and the load phase voltage sampled value, the load mutually electricity is calculated
Press detected value,
Second preset formula is：Vi=Ui-biasi(n),
Wherein, the ViIt is characterized as the phase-voltage measurement value of the i-th phase, the UiIt is characterized as the load phase voltage of the i-th phase
Sampled value, the biasi(n) it is characterized as the straggling parameter that the nth iteration of the i-th phase calculates.
6. a kind of phase-voltage measurement device of three-phase inverting circuit, which is characterized in that including：
Loading unit, for detect in power on holding state when, specific pulse bandwidth modulation signals are loaded onto three-phase
Inverse changing driving circuit, and in the loading procedure determine any phase unloaded phase voltage sampled value；
Determination unit for carrying out low-pass filtering operation to the unloaded phase voltage sampled value, determines to calibrate each phase
The straggling parameter of load phase voltage.
7. the phase-voltage measurement device of three-phase inverting circuit according to claim 6, which is characterized in that
The determination unit is additionally operable to：Determine that all unloaded phase voltages of each phase in corresponding default prover time are adopted
Sample value；
The determination unit is additionally operable to：According to the first preset formula, the unloaded phase voltage sampled value, iterative cycles are sequentially input
Calculate, to carry out low-pass filtering, and will final iterative calculation as a result, be determined as the straggling parameter of corresponding phase,
First preset formula is：Bias (n)=a × U0(n)+(1-a) × bias (n-1),
Wherein, the bias (n) is characterized as the straggling parameter that nth iteration calculates, and the n is characterized as iterations, n
≤ 1, a are characterized as preset constant, the U0(n) it is characterized as n-th of unloaded phase voltage sampled value.
8. the phase-voltage measurement device of three-phase inverting circuit according to claim 7, which is characterized in that
The default prover time is 3s-5s.
9. the phase-voltage measurement device of the three-phase inverting circuit according to any one of claim 6 to 8, which is characterized in that
The determination unit is additionally operable to：When detecting in machine operating condition, sampled respectively really according to the default sampling period
The load phase voltage sampled value of fixed each phase；
The phase-voltage measurement device further includes：
Alignment unit, for according to the straggling parameter, calibrating each corresponding load phase voltage sampled value, really
It is set to corresponding load phase voltage detected value.
10. the phase-voltage measurement device of three-phase inverting circuit according to claim 9, which is characterized in that further include：
Computing unit, for according to the second preset formula, according to the straggling parameter and the load phase voltage sampled value, calculating
The load phase voltage detected value,
Second preset formula is：Vi=Ui-biasi(n),
Wherein, the ViIt is characterized as the phase-voltage measurement value of the i-th phase, the UiIt is characterized as the load phase voltage of the i-th phase
Sampled value, the biasi(n) it is characterized as the straggling parameter that the nth iteration of the i-th phase calculates.
11. a kind of air conditioner, the air conditioner includes memory, processor and is stored on the memory and can be at the place
The computer program run on reason device, which is characterized in that
The processor realizes the three-phase inversion electricity as any one of claim 1 to 5 when performing the computer program
The step of phase-voltage measurement method on road；
And/or the phase-voltage measurement device including the three-phase inverting circuit as any one of claim 6 to 10.
12. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that
The three-phase inverting circuit as any one of claim 1 to 5 is realized when the computer program is executed by processor
Phase-voltage measurement method the step of.
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| CN201810032378.8A CN108092581B (en) | 2018-01-12 | 2018-01-12 | Phase voltage detection method and device of three-phase inverter circuit, air conditioner and medium |
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| CN201810032378.8A CN108092581B (en) | 2018-01-12 | 2018-01-12 | Phase voltage detection method and device of three-phase inverter circuit, air conditioner and medium |
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| CN1402013A (en) * | 2002-09-23 | 2003-03-12 | 清华大学 | Method for pure electrical measuring no-load potential phasor of synchronous electric generator |
| WO2012049770A1 (en) * | 2010-10-15 | 2012-04-19 | 東芝三菱電機産業システム株式会社 | Synchronous machine activation device |
| CN104362881A (en) * | 2014-11-17 | 2015-02-18 | 天津电气科学研究院有限公司 | Dead-time compensation method based on instantaneous current and refined voltage compensation |
| CN106788111A (en) * | 2016-11-28 | 2017-05-31 | 广东美芝制冷设备有限公司 | Electric machine control system and its DC bus-bar voltage compensation method, device |
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| CN1402013A (en) * | 2002-09-23 | 2003-03-12 | 清华大学 | Method for pure electrical measuring no-load potential phasor of synchronous electric generator |
| WO2012049770A1 (en) * | 2010-10-15 | 2012-04-19 | 東芝三菱電機産業システム株式会社 | Synchronous machine activation device |
| CN104362881A (en) * | 2014-11-17 | 2015-02-18 | 天津电气科学研究院有限公司 | Dead-time compensation method based on instantaneous current and refined voltage compensation |
| CN106788111A (en) * | 2016-11-28 | 2017-05-31 | 广东美芝制冷设备有限公司 | Electric machine control system and its DC bus-bar voltage compensation method, device |
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