CN104062493B - Method and device for obtaining load power, PFC circuit, switching power supply and electric appliance - Google Patents
Method and device for obtaining load power, PFC circuit, switching power supply and electric appliance Download PDFInfo
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- CN104062493B CN104062493B CN201310090693.3A CN201310090693A CN104062493B CN 104062493 B CN104062493 B CN 104062493B CN 201310090693 A CN201310090693 A CN 201310090693A CN 104062493 B CN104062493 B CN 104062493B
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Abstract
The invention discloses a method and device for obtaining a load power, a PFC circuit, a switching power supply and an electric appliance, wherein the method includes the following steps: obtaining an input current value of the PFC (Power Factor Correction) circuit and an output voltage value of the PFC circuit; carrying out input voltage calculation on the input current value and the output voltage value through a state observer so as to obtain an input voltage value of the PFC circuit; and according to the current value and the input voltage value, carrying out power calculation so as to obtain the load power. Through the method and device for obtaining the load power, the PFC circuit, the switching power supply and the electric appliance, an effect that the load power can be accurately calculated without detecting the input voltage of the PFC circuit is realized so that power consumption of a test resistor of the input voltage of the PFC circuit is saved and the complexity of a hardware circuit is simplified.
Description
Technical field
The present invention relates to field of power electronics, electric in particular to a kind of method of acquisition bearing power, device, PFC
Road, Switching Power Supply and electrical equipment.
Background technology
In prior art during the bearing power of detection switch power supply, it usually needs power factor corrector in collection power supply
（Power Factor Correction, referred to as PFC）Two physical quantitys of input current and input voltage of circuit, then pass through
The two values calculate bearing power, are alternating current yet with input voltage, and fluctuation is big and there is zero crossing, detection error compared with
Greatly, the method for existing direct measurement pfc circuit input voltage is readily incorporated error, so as to cause power calculation inaccurate.
For in prior art when the bearing power of Switching Power Supply is obtained, it is defeated due to the pfc circuit that directly collects
Enter that voltage is inaccurate, so as to the bearing power for causing Switching Power Supply detects inaccurate problem, effectively solution is not yet proposed at present
Certainly scheme.
The content of the invention
For in prior art when the bearing power of Switching Power Supply is obtained, it is defeated due to the pfc circuit that directly collects
Enter that voltage is inaccurate, so as to the bearing power for causing Switching Power Supply detects inaccurate problem, effectively solution is not yet proposed at present
Certainly scheme, for this purpose, present invention is primarily targeted at providing a kind of method, device, pfc circuit, switch for obtaining bearing power
Power supply and electrical equipment, to solve the above problems.
To achieve these goals, according to an aspect of the invention, there is provided a kind of method for obtaining bearing power, is somebody's turn to do
Obtaining the method for bearing power includes：Obtain the input current value and power factor corrector of power factor corrector pfc circuit
The output voltage values of pfc circuit；Input voltage calculating is carried out to input current value and output voltage values by state observer, with
Obtain the input voltage value of power factor corrector pfc circuit；Power calculation is carried out according to input current value and input voltage value,
To obtain the power of load.
Further, input voltage calculating is carried out to input current value and output voltage values by state observer, to obtain
The step of input voltage value for taking power factor corrector pfc circuit, includes：Calculated by the first equation and second equation and obtained
The input voltage value v of power factor corrector pfc circuitin, wherein, the first equation is：
Second equation is：
Wherein, L for power factor corrector pfc circuit inductance value, iinFor input current value, vinFor input voltage value,For the estimator of x,For the estimator of y,For the reference quantity of x,For iinReference quantity,For vinReference quantity,For
Reference quantity,Y is input current value iin, vpFor the voltage-to-ground of the switching tube of power factor corrector pfc circuit,
A isB isC is [1 0], and D is observation gain matrix, and u is vp, d1 and d2 is observation gain, wherein, first
Under beginning state, vpValue be the output voltage values of power factor corrector pfc circuit.
Further, the input current value and power factor corrector pfc circuit of power factor corrector pfc circuit are obtained
Output voltage values the step of include：The input current signal and power factor correction of collection power factor corrector pfc circuit
The output voltage signal of device pfc circuit；D/A conversions are carried out to input current signal and output voltage signal, to generate PWM letters
Number；Sampling processing is carried out to pwm signal, is repaiied with the input current value and power factor that obtain power factor corrector pfc circuit
The output voltage values of positive device pfc circuit.
Further, power calculation is carried out according to input current value and input voltage value, to obtain the step of the power of load
Suddenly include：The power P that power calculation obtains load is carried out by equation below, formula is as follows：P=vin*iin, wherein, iinFor defeated
Enter current value, vinFor input voltage value.
To achieve these goals, according to a further aspect in the invention, there is provided a kind of device for obtaining bearing power, should
Obtaining the device of bearing power includes：Signal processing module, for obtaining the input current value of power factor corrector pfc circuit
With the output voltage values of power factor corrector pfc circuit；First computing module, for passing through state observer to input current
Value and output voltage values carry out input voltage calculating, to obtain the input voltage value of power factor corrector pfc circuit；Second meter
Module is calculated, for carrying out power calculation according to input current value and input voltage value, to obtain the power of load.
Further, the first computing module includes：First sub- computing module, based on by the first equation and second equation
Calculate the input voltage value v for obtaining power factor corrector pfc circuitin, wherein, the first equation is：
Second equation is：
Wherein, L for power factor corrector pfc circuit inductance value, iinFor input current value, vinFor input voltage value,For the estimator of x,For the estimator of y,For the reference quantity of x,For iinReference quantity,For vinReference quantity,For
Reference quantity,Y is input current value iin, vpFor the voltage-to-ground of the switching tube of power factor corrector pfc circuit,
A isB isC is [1 0], and D is observation gain matrix, and u is vp, d1 and d2 is observation gain, wherein, first
Under beginning state, vpValue be the output voltage values of power factor corrector pfc circuit.
Further, signal processing module includes：Acquisition module, for gathering the defeated of power factor corrector pfc circuit
Enter the output voltage signal of current signal and power factor corrector pfc circuit；Signal processing submodule, for input current
Signal and output voltage signal carry out D/A conversions, to generate pwm signal；Sampling processing module, for adopting to pwm signal
Sample process, to obtain the input current value of power factor corrector pfc circuit and the output electricity of power factor corrector pfc circuit
Pressure value.
Further, the second computing module includes：Second sub- computing module, for carrying out power calculation by equation below
The power P of load is obtained, formula is as follows：P=vin*iin, wherein, iinFor input current value, vinFor input voltage value.
To achieve these goals, according to a further aspect in the invention, there is provided a kind of pfc circuit, the pfc circuit bag
Include：Signal processor, for gathering the input current signal of pfc circuit and the output voltage signal of pfc circuit, and to input electricity
Stream signal and output voltage signal carry out D/A conversions, to generate pwm signal, then sampling processing are carried out to pwm signal, to obtain
Take the input current value of pfc circuit and the output voltage values of pfc circuit；Computer, is connected with signal processor, for according to defeated
Entering current value and output voltage values carries out input voltage calculating, to obtain the input voltage value of pfc circuit, and according to input current
Value and input voltage value carry out power calculation, to obtain the power of load.
Further, pfc circuit also includes：Inductance, first power connector end of the first end as pfc circuit；Diode,
First end is connected with the second end of inductance, and the second end loads connection end as the first of pfc circuit；Switching tube, first end and electricity
The second end connection of sense, the second end is connected with signal processor, the 3rd end ground connection；Second end of electric capacity, first end and diode
Connection, the second end is connected with the second end of switching tube；Wherein, the second end of switching tube connects as the second source of pfc circuit
End, and second as pfc circuit loads connection end.
To achieve these goals, according to a further aspect in the invention, there is provided a kind of Switching Power Supply, the Switching Power Supply bag
Include the device or pfc circuit for obtaining bearing power.
To achieve these goals, according to a further aspect in the invention, there is provided a kind of electrical equipment, including obtain bearing power
Device or pfc circuit or Switching Power Supply.
By the present invention, by obtaining the input current value of pfc circuit and the output voltage values of pfc circuit, then calculate
Device carries out the calculating of input voltage value to the input current value of pfc circuit and the output voltage values of pfc circuit, obtains input voltage
Value, and power calculation is carried out according to calculated input voltage value, the power of load is obtained, rather than it is electric directly to gather PFC
The input voltage value on road, so as to solve prior art in obtain Switching Power Supply bearing power when, due to directly collecting
Pfc circuit input voltage it is inaccurate, so as to the bearing power for causing Switching Power Supply detects inaccurate problem, realize nothing
The input voltage of pfc circuit need to be detected just can accurately calculate the effect of bearing power, so as to save detection pfc circuit
Input voltage detection resistance on power consumption, simplify the complexity of hardware circuit.
Description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of the device of acquisition bearing power according to embodiments of the present invention；
Fig. 2 is the schematic diagram of the device of according to embodiments of the present invention one acquisition bearing power；
Fig. 3 is the structure chart of pfc circuit according to embodiments of the present invention；
Fig. 4 is the system construction drawing of according to embodiments of the present invention one pfc circuit；And
Fig. 5 is the flow chart of the method for acquisition bearing power according to embodiments of the present invention.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Below with reference to the accompanying drawings and in conjunction with the embodiments describing the present invention in detail.
Fig. 1 is the structural representation of the device of acquisition bearing power according to embodiments of the present invention.As shown in figure 1, the dress
Put including：Signal processing module 10, for obtaining the input current value and power factor correction of power factor corrector pfc circuit
The output voltage values of device pfc circuit；First computing module 30, for passing through state observer to input current value and output voltage
Value carries out input voltage calculating, to obtain the input voltage value of power factor corrector pfc circuit；Second computing module 50, uses
In power calculation is carried out according to input current value and input voltage value, to obtain the power of load.
Using the device of the acquisition bearing power of the present invention, by the defeated of the power factor corrector pfc circuit that gets
Entering the output voltage values of current value and power factor corrector pfc circuit carries out the calculating of input voltage value, obtains input voltage
Value, then carries out power calculation according to calculated input voltage value, obtains the power of load, rather than directly gathers power
The input voltage value of factor correction device pfc circuit, and output voltage is DC quantity, changes little, easily detection, and also output voltage is
The output valve of the BOOST booster circuits adjustment in power factor corrector pfc circuit can be passed through, it is stable such that it is able to obtain
Testing result, so as to solve prior art in the input current and input voltage using power factor corrector pfc circuit
When calculating the whole acc power of electric equipment, because the input voltage of the power factor corrector pfc circuit for directly collecting is forbidden
Really, so as to cause the inaccurate problem of whole acc power of electric equipment, realizing need not detect power factor corrector pfc circuit
Input voltage just can accurately calculate bearing power, so as to save detection power factor corrector pfc circuit it is defeated
Enter the power consumption in the detection resistance of voltage, simplify the complexity of hardware circuit.
Wherein, the load in above-described embodiment can be the load in electric equipment, output voltage values can for power because
Number corrector pfc circuit is exported to the magnitude of voltage of load.
In the above embodiment of the present invention, the first computing module 30 can include：First sub- computing module, for passing through
First equation and second equation calculate the input voltage value v for obtaining power factor corrector pfc circuitin, wherein, the first equation
For：
Second equation is：
Wherein, L for power factor corrector pfc circuit inductance value, iinFor input current value, vinFor input voltage value,For the estimator of x,For the estimator of y,For the reference quantity of x,For iinReference quantity,For vinReference quantity,For
Reference quantity,Y is input current value iin, vpFor the voltage-to-ground of the switching tube of power factor corrector pfc circuit,
A isB isC is [10], and D is observation gain matrix, and u is vp, d1 and d2 is observation gain, wherein, first
Under beginning state, vpValue be the output voltage values of power factor corrector pfc circuit.Wherein, the first above-mentioned equation is shape
State space matrix equation, second equation is observing matrix equation.
Wherein, in initialization, vpEqual to Vdc, initial V is calculated according to above-mentioned the first equation and second equationin,
After electric equipment starts, can be according to formula according to power factor corrector pfc circuit：vin（before）=SLiin+Vp
It is calculated vpValue, in the formula, S to draw general Arras operator, L for power factor corrector pfc circuit inductance value,
iinFor the input current value at current time, vin（before）For the input voltage value that the estimation of a upper moment is obtained.It is calculated and works as
After the Vp at front moment, input voltage value is calculated according to above-mentioned state observer.
Specifically, above-mentioned VdcAs output voltage values of power factor corrector pfc circuit.
Specifically, voltage observer block diagram as shown in Figure 2, can draw according to voltage observer as shown in Figure 2
d1With d2Afterwards, you can observation drawsWherein,Represent the input voltage value v obtained according to voltage observer estimationin, use
" ∧ " this symbol represents estimated value, namely estimator, but in follow-up calculatingValue be input voltage value vin。
Wherein, parameter in Fig. 2：Represent vpReference quantity,WithEstimator and the input of input current are represented respectively
The estimator of voltage.
According to the abovementioned embodiments of the present invention, signal processing module 10 can include：Acquisition module, for gather power because
The input current signal of number corrector pfc circuit and the output voltage signal of power factor corrector pfc circuit；Signal processing
Module, for carrying out D/A conversions to input current signal and output voltage signal, to generate pwm signal；Sampling processing module,
For carrying out sampling processing to pwm signal, repaiied with the input current value and power factor that obtain power factor corrector pfc circuit
The output voltage values of positive device pfc circuit.
In the above embodiment of the present invention, the second computing module 50 can include：Second sub- computing module, for passing through
Equation below carries out the power P that power calculation obtains load, and formula is as follows：P=vin*iin, wherein, iinFor input current value, vin
For input voltage value.
Fig. 3 is the structure chart of pfc circuit according to embodiments of the present invention.As shown in figure 3, the pfc circuit can include：Letter
Number processor 101, for gathering the input current signal of pfc circuit 100 and the output voltage signal of pfc circuit 100, and to defeated
Entering current signal and output voltage signal carries out D/A conversions, to generate pwm signal, then carries out sampling processing to pwm signal,
To obtain the input current value of pfc circuit and the output voltage values of pfc circuit；Computer 103, is connected with signal processor 101,
For carrying out input voltage calculating according to input current value and output voltage values, to obtain the input voltage value of pfc circuit, and root
Power calculation is carried out according to input current value and input voltage value, to obtain the power of load.
Using the pfc circuit of the present invention, the input current value and pfc circuit of pfc circuit are obtained by signal processor
Output voltage values, then computer input voltage value is carried out to the input current value of pfc circuit and the output voltage values of pfc circuit
Calculating, obtain input voltage value, and power calculation is carried out according to calculated input voltage value, obtain the power of load,
Rather than directly gather pfc circuit input voltage value, so as to solve prior art in the input current using pfc circuit
With input voltage calculate electric equipment whole acc power when, due to the input voltage of the pfc circuit for directly collecting it is inaccurate, from
And cause the inaccurate problem of whole acc power of electric equipment, realizing need not detect that the input voltage of pfc circuit just can be with standard
Bearing power is really calculated, so as to the power consumption in the detection resistance of the input voltage for saving detection pfc circuit, is simplified hard
The complexity of part circuit.
Fig. 4 is the system construction drawing of according to embodiments of the present invention one pfc circuit, and embodiment as shown in Figure 4, PFC is electric
Road can also include：Inductance L, first power connector end of the first end as pfc circuit；Diode D, the of first end and inductance
Two ends connect, and the second end loads connection end as the first of pfc circuit；Switching tube Q, first end is connected with the second end of inductance,
Second end is connected with signal processor, the 3rd end ground connection；Electric capacity C, first end is connected with the second end of diode, the second end with open
Close the second end connection of pipe；Wherein, the second end of switching tube as pfc circuit second source connection end, and as pfc circuit
Second load connection end.
Specifically in the diagram, the electric current of power supply AC is input in load 500 by rectifier bridge 300 and pfc circuit 100.
Fig. 5 is the flow chart of the method for acquisition bearing power according to embodiments of the present invention.As shown in figure 5, the method can
To comprise the steps：
Step S102, obtains the input current value and power factor corrector pfc circuit of power factor corrector pfc circuit
Output voltage values, wherein, output voltage values be power factor corrector pfc circuit export to load magnitude of voltage.
Step S104, carries out input voltage calculating, to obtain by state observer to input current value and output voltage values
Take the input voltage value of power factor corrector pfc circuit.
Step S106, according to input current value and input voltage value power calculation is carried out, to obtain the power of load.
It is electric by the input current value of pfc circuit and PFC that get using the method for the acquisition bearing power of the present invention
The output voltage values on road carry out the calculating of input voltage value, obtain input voltage value, then according to calculated input voltage
Value carries out power calculation, obtains the power of load, rather than the directly input voltage value of collection pfc circuit, existing so as to solve
Have in technology when the input current using pfc circuit and input voltage calculate the whole acc power of electric equipment, due to directly adopting
The input voltage of the pfc circuit for collecting is inaccurate, so as to cause the inaccurate problem of whole acc power of electric equipment, realizes nothing
The input voltage of pfc circuit need to be detected just can accurately calculate bearing power, so as to save the input of detection pfc circuit
Power consumption in the detection resistance of voltage, simplifies the complexity of hardware circuit.
In the above embodiment of the present invention, input current value and output voltage values are input into by state observer
Voltage is calculated, and can be included the step of with the input voltage value for obtaining power factor corrector pfc circuit：
The input voltage value v for obtaining power factor corrector pfc circuit is calculated by the first equation and second equationin, its
In, the first equation is：
Second equation is：
Wherein, L for power factor corrector pfc circuit inductance value, iinFor input current value, vinFor input voltage value,For the estimator of x,For the estimator of y,For the reference quantity of x,For iinReference quantity,For vinReference quantity,For
Reference quantity,Y is input current value iin, vpFor the voltage-to-ground of the switching tube of power factor corrector pfc circuit,B isC is [1 0], and D is observation gain matrix, and u is vp, d1 and d2 is observation gain, wherein, initial
Under state, vpValue be the output voltage values of power factor corrector pfc circuit.
In the above embodiment of the present invention, obtain power factor corrector pfc circuit input current value and power because
The step of output voltage values of number corrector pfc circuit, can include：The input current of collection power factor corrector pfc circuit
The output voltage signal of signal and power factor corrector pfc circuit；D/A is carried out to input current signal and output voltage signal
Conversion, to generate pwm signal；Sampling processing is carried out to pwm signal, to obtain the input electricity of power factor corrector pfc circuit
The output voltage values of flow valuve and power factor corrector pfc circuit.
In the above embodiment of the present invention, power calculation is carried out according to input current value and input voltage value, to obtain
The step of power of load, can include：The power P that power calculation obtains load is carried out by equation below, formula is as follows：P=
vin*iin, wherein, iinFor input current value, vinFor input voltage value.
It should be noted that can be in such as one group computer executable instructions the step of the flow process of accompanying drawing is illustrated
Perform in computer system, and, although show logical order in flow charts, but in some cases, can be with not
The order being same as herein performs shown or described step.
According to another embodiment of the present invention, there is provided a kind of Switching Power Supply, the Switching Power Supply includes obtaining bearing power
Device or pfc circuit.
Using the Switching Power Supply of the present invention, the device or pfc circuit of acquisition bearing power therein are electric by obtaining PFC
The input current value on road and the output voltage values of pfc circuit, then input current value and pfc circuit of the computer to pfc circuit
Output voltage values carry out the calculating of input voltage value, obtain input voltage value, and enter according to calculated input voltage value
Row power calculation, obtains the power of load, rather than the directly input voltage value of collection pfc circuit, so as to solve existing skill
In art when the input current and input voltage of pfc circuit in using Switching Power Supply calculate the whole acc power of electric equipment, due to
The input voltage of the pfc circuit for directly collecting is inaccurate, so as to the bearing power for causing Switching Power Supply detects inaccurate asking
Topic, realizing need not detect that the input voltage of pfc circuit just can accurately calculate bearing power, so as to save detection
Power consumption in the detection resistance of the input voltage of pfc circuit, simplifies the complexity of hardware circuit.
A kind of embodiments in accordance with the present invention, there is provided electrical equipment, including obtain the device or pfc circuit of bearing power or open
Powered-down source.
Using the electrical equipment of the present invention, the device or pfc circuit of acquisition bearing power therein, obtained by signal processor
The input current value of pfc circuit and the output voltage values of pfc circuit, then input current value and PFC of the computer to pfc circuit
The output voltage values of circuit carry out input voltage value, calculating, obtain input voltage value, and according to calculated input voltage
Value carries out power calculation, obtains the power of load, rather than the directly input voltage value of collection pfc circuit, existing so as to solve
Have in technology when the input current and input voltage of pfc circuit in using Switching Power Supply calculate the whole acc power of electric equipment,
Due to the input voltage of the pfc circuit for directly collecting it is inaccurate, so as to cause Switching Power Supply bearing power detect it is inaccurate
Problem, realizing need not detect that the input voltage of pfc circuit just can accurately calculate bearing power, so as to save inspection
Power consumption in the detection resistance of the input voltage for surveying pfc circuit, simplifies the complexity of hardware circuit.
Wherein, electrical equipment can be air-conditioner.
As can be seen from the above description, present invention achieves following technique effect：Using the present invention, by obtaining
The input current value of pfc circuit and the output voltage values of pfc circuit, then input current value and PFC of the computer to pfc circuit
The output voltage values of circuit carry out the calculating of input voltage value, obtain input voltage value, and according to calculated input voltage
Value carries out power calculation, obtains the power of load, rather than the directly input voltage value of collection pfc circuit, existing so as to solve
Have in technology when the input current and input voltage of pfc circuit in using Switching Power Supply calculate the whole acc power of electric equipment,
Due to the input voltage of the pfc circuit for directly collecting it is inaccurate, so as to cause Switching Power Supply bearing power detect it is inaccurate
Problem, realizing need not detect that the input voltage of pfc circuit just can accurately calculate bearing power, so as to save inspection
Power consumption in the detection resistance of the input voltage for surveying pfc circuit, simplifies the complexity of hardware circuit.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realizing, they can be concentrated on single computing device, or are distributed in multiple computing devices and are constituted
Network on, alternatively, they can be realized with the executable program code of computing device, it is thus possible to they are stored
Performed by computing device in the storage device, or they be fabricated to respectively each integrated circuit modules, or by they
In multiple modules or step be fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific
Hardware and software is combined.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (12)
1. it is a kind of obtain bearing power method, it is characterised in that include：
Obtain the input current value of power factor corrector pfc circuit and the output electricity of the power factor corrector pfc circuit
Pressure value；
Input voltage calculating is carried out to the input current value and the output voltage values by state observer, it is described to obtain
The input voltage value of power factor corrector pfc circuit；
Power calculation is carried out according to the input current value and the input voltage value, to obtain the power of the load,
Wherein, input voltage calculating is carried out to the input current value and the output voltage values by state observer, to obtain
The step of input voltage value for taking the power factor corrector pfc circuit, includes：Calculated by the first equation and second equation
Obtain the input voltage value v of the power factor corrector pfc circuitin, first equation be state space matrices equation, institute
Second equation is stated for observing matrix equation.
2. method according to claim 1, it is characterised in that
First equation is：
The second equation is：
Wherein, the L is the inductance value of the power factor corrector pfc circuit, the iinFor input current value, the vinFor
Input voltage value, it is describedIt is described for the estimator of the xIt is described for the estimator of the yIt is described for the reference quantity of x
For the iinReference quantity, it is describedFor the vinReference quantity, it is describedForReference quantity, it is describedThe y is
Input current value iin, the vpFor the voltage-to-ground of the switching tube of the power factor corrector pfc circuit, the A isThe B isThe C is [1 0], and the D is observation gain matrix, and the u is the vp, the d1And institute
State d2To observe gain, wherein, in an initial condition, the vpValue be the output of the power factor corrector pfc circuit
Magnitude of voltage.
3. method according to claim 1, it is characterised in that obtain the input current of power factor corrector pfc circuit
The step of output voltage values of value and the power factor corrector pfc circuit, includes：
Gather the input current signal and the power factor corrector pfc circuit of the power factor corrector pfc circuit
Output voltage signal；
D/A conversions are carried out to the input current signal and the output voltage signal, to generate pwm signal；
Sampling processing is carried out to the pwm signal, to obtain input current value and the institute of the power factor corrector pfc circuit
State the output voltage values of power factor corrector pfc circuit.
4. method according to claim 1, it is characterised in that entered according to the input current value and the input voltage value
Row power calculation, includes the step of with the power for obtaining the load：
The power P that power calculation obtains the load is carried out by equation below, the formula is as follows：
P=vin*iin, wherein, the iinFor the input current value, the vinFor the input voltage value.
5. it is a kind of obtain bearing power device, it is characterised in that include：
Signal processing module, for obtaining the input current value and the power factor correction of power factor corrector pfc circuit
The output voltage values of device pfc circuit；
First computing module, for input electricity to be carried out to the input current value and the output voltage values by state observer
Pressure is calculated, to obtain the input voltage value of the power factor corrector pfc circuit；
Second computing module, for carrying out power calculation according to the input current value and the input voltage value, to obtain
The power of load is stated,
Wherein, input voltage calculating is carried out to the input current value and the output voltage values by state observer, to obtain
The step of input voltage value for taking the power factor corrector pfc circuit, includes：Calculated by the first equation and second equation
Obtain the input voltage value v of the power factor corrector pfc circuitin, first equation be state space matrices equation, institute
Second equation is stated for observing matrix equation.
6. device according to claim 5, it is characterised in that
First equation is：
The second equation is：
Wherein, the L is the inductance value of the power factor corrector pfc circuit, the iinFor input current value, the vinFor
Input voltage value, it is describedIt is described for the estimator of the xIt is described for the estimator of the yIt is described for the reference quantity of x
For the iinReference quantity, it is describedFor the vinReference quantity, it is describedForReference quantity, it is describedThe y is
Input current value iin, the vpFor the voltage-to-ground of the switching tube of the power factor corrector pfc circuit, the A isThe B isThe C is [1 0], and the D is observation gain matrix, and the u is the vp, the d1And institute
State d2To observe gain, wherein, in an initial condition, the vpValue be the output of the power factor corrector pfc circuit
Magnitude of voltage.
7. device according to claim 5, it is characterised in that the signal processing module includes：
Acquisition module, the input current signal and the power factor for gathering the power factor corrector pfc circuit is repaiied
The output voltage signal of positive device pfc circuit；
Signal processing submodule, for carrying out D/A conversions to the input current signal and the output voltage signal, to generate
Pwm signal；
Sampling processing module, it is electric to obtain the power factor corrector PFC for carrying out sampling processing to the pwm signal
The output voltage values of the input current value on road and the power factor corrector pfc circuit.
8. device according to claim 5, it is characterised in that second computing module includes：
Second sub- computing module, for carrying out the power P that power calculation obtains the load by equation below, the formula is such as
Under：
P=vin*iin, wherein, the iinFor the input current value, the vinFor the input voltage value.
9. a kind of pfc circuit, it is characterised in that include：
Signal processor is for gathering the input current signal of pfc circuit and the output voltage signal of the pfc circuit and right
The input current signal and the output voltage signal carry out D/A conversions, to generate pwm signal, then to the pwm signal
Sampling processing is carried out, to obtain the input current value of the pfc circuit and the output voltage values of the pfc circuit；
Computer, is connected with the signal processor, defeated for being carried out according to the input current value and the output voltage values
Enter voltage calculating, to obtain the input voltage value of the pfc circuit, and according to the input current value and the input voltage value
The power that power calculation obtains load is carried out, wherein, input electricity is carried out according to the input current value and the output voltage values
Pressure is calculated, and is included with the input voltage value for obtaining the pfc circuit：Calculated by the first equation and second equation and obtain the work(
The input voltage value v of rate factor correction device pfc circuitin, first equation be state space matrices equation, the second equation
For observing matrix equation.
10. pfc circuit according to claim 9, it is characterised in that the pfc circuit also includes：
Inductance, first power connector end of the first end as the pfc circuit；
Diode, first end is connected with the second end of the inductance, first load connection of second end as the pfc circuit
End；
Switching tube, first end is connected with the second end of the inductance, and the second end is connected with the signal processor, the 3rd termination
Ground；
Electric capacity, first end is connected with the second end of the diode, and the second end is connected with the second end of the switching tube；Wherein,
Second end of the switching tube as the pfc circuit second source connection end, and as the second of the pfc circuit
Load connection end.
11. a kind of Switching Power Supplies, it is characterised in that including the dress of the acquisition bearing power any one of claim 5 to 8
Put or the pfc circuit as described in claim 9 or 10.
A kind of 12. electrical equipment, it is characterised in that device including the acquisition bearing power any one of claim 5 to 8 or
Pfc circuit or Switching Power Supply as claimed in claim 11 as described in claim 9 or 10.
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| CN201310090693.3A CN104062493B (en) | 2013-03-20 | 2013-03-20 | Method and device for obtaining load power, PFC circuit, switching power supply and electric appliance |
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| CN201310090693.3A CN104062493B (en) | 2013-03-20 | 2013-03-20 | Method and device for obtaining load power, PFC circuit, switching power supply and electric appliance |
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| CN104062493B true CN104062493B (en) | 2017-05-10 |
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| US10833620B2 (en) * | 2018-10-05 | 2020-11-10 | Steering Solutions Ip Holding Corporation | Dynamic estimation of supply current for electric motor drive |
| CN114374311B (en) * | 2022-03-21 | 2022-07-15 | 深圳市芯茂微电子有限公司 | Load power characterization method, system and processing module |
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| CN101291106A (en) * | 2007-04-20 | 2008-10-22 | 台达电子工业股份有限公司 | Sampling method for adjusting duty ratio |
| CN101382815A (en) * | 2008-10-23 | 2009-03-11 | 上海儒竞电子科技有限公司 | Controller for correcting hysteresis current by single-phase power factor |
| CN101546963A (en) * | 2009-04-22 | 2009-09-30 | 南京航空航天大学 | Digital monocyclic control method of PFC converter |
| CN101777770A (en) * | 2010-02-12 | 2010-07-14 | 浙江大学 | Control circuit for voltage dropping type power factor corrector |
| CN101873059A (en) * | 2009-04-27 | 2010-10-27 | 快捷韩国半导体有限公司 | Power factor correction circuit and driving method thereof |
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|---|---|---|---|---|
| CN101291106A (en) * | 2007-04-20 | 2008-10-22 | 台达电子工业股份有限公司 | Sampling method for adjusting duty ratio |
| CN101382815A (en) * | 2008-10-23 | 2009-03-11 | 上海儒竞电子科技有限公司 | Controller for correcting hysteresis current by single-phase power factor |
| CN101546963A (en) * | 2009-04-22 | 2009-09-30 | 南京航空航天大学 | Digital monocyclic control method of PFC converter |
| CN101873059A (en) * | 2009-04-27 | 2010-10-27 | 快捷韩国半导体有限公司 | Power factor correction circuit and driving method thereof |
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