CN207459985U - For the circuit being filtered to the signal from power supply - Google Patents
For the circuit being filtered to the signal from power supply Download PDFInfo
- Publication number
- CN207459985U CN207459985U CN201721008708.7U CN201721008708U CN207459985U CN 207459985 U CN207459985 U CN 207459985U CN 201721008708 U CN201721008708 U CN 201721008708U CN 207459985 U CN207459985 U CN 207459985U
- Authority
- CN
- China
- Prior art keywords
- electric current
- circuit
- winding
- power supply
- driver circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Rectifiers (AREA)
Abstract
The utility model discloses the enhanced DC reactors of electronics.The circuit for being filtered to the signal from power supply is provided, including：The capacitor in parallel with load and the main winding around core.The one side of main winding is electrically coupled to power supply, and the opposite side of main winding is electrically coupled to capacitor.The biasing winding and bias driver circuit around core are additionally provided, is arranged to the electric current controlled according to output current by biasing winding.
Description
Technical field
Present disclosure is related to the enhanced direct current of electronics set in electronic power converter for electronic filtering purpose
Choke coil.
Background technology
It occasionally wants to can selectively filter out specific frequency or particular range from the frequency compounding of circuit
The circuit of frequency.The circuit for being designed to perform frequency selection is known as wave filter.Electronic filter is can be designed to repair
Change, modify or refuse all undesired frequencies of electric signal and only receiving or the circuit by desired signal.Wave filter leads to
Amplitude and/or phase characteristic compared with frequency change signal are crossed to realize above-mentioned function.
Inductor is passive double-end electronic unit, when electric current flows through its, by power storage in magnetic field.In inductor
Electric current resist electric current arbitrary variation.This characteristic so that inductor is particularly useful as filter element, because they are past
Toward the ripple " smooth " made in rectified voltage waveform.Choke coil is for stopping the high-frequency ac in electronic filter circuit
(AC) at the same make low frequency or direct current (DC) by inductor.The impedance of choke coil increases with frequency, and its resistance no matter
The low resistance how frequency changes all constant choke coil can make AC and DC by and almost without power attenuation, but due to its electricity
It is anti-, the amount of AC can be limited.
Wave filter is commonly used in electronic power converter.Some electronic equipments are sensitive to harmonic wave present in supply voltage,
Therefore need power regulation that could work normally.
It is shown in fig 1 a for the custom circuit of this method.Custom circuit includes：(it can be with for input power 100
Three phase rectifier AC power supplies or DC power supply), DC choke coils 120, DC bus capacitors 140, soft starting device 160 and negative
Carry 180.The electronics low-pass filtering formed by the winding of DC choke inductors 120 and the internal energy storage device of converter
Device is referred to as " DC bus capacitors ".The circuit arrangement is also referred to as series resonant tank (SRT) circuit, loads 180 and DC
Bus capacitor 140 is in parallel.
The main problem of the circuit is that it can cause big current ripple.Ripple is due to the endless of exchange input waveform
From the variation of the obtained DC outputs of AC caused by full inhibition.(also referred to as hysteresis loop or B-H is bent for magnetization curve in Figure 1b
Line) on, this can be illustrated as big monopole wobble area 110 (dash area of curve).
Ripple can cause the continually changing voltage and current of output rather than desired DC, therefore cause reliability
And performance issue.
Therefore, the purpose of this utility model is to improve the Performance And Reliability of custom circuit, and realizes power converter
Size, weight and cost possible reduction.
Utility model content
According in a first aspect, provide a kind of electronic circuit for being filtered to the signal from power supply, including：
The capacitor in parallel with load；Core；Around the main winding of core, wherein, the one side of main winding is electrically coupled to power supply, and main winding
Opposite side be electrically coupled to capacitor；Around the biasing winding of core；And bias driver circuit, it is arranged to according to output
Electric current controls the electric current by biasing winding.
Bias driver circuit can act to change the magnetic field of in-core, which can be used as the inductor in main circuit.
For example, by the real-time sensing of the electric current in the different piece to circuit and the proper treatment to these signals and amplification, partially
Set driver circuit can cause the additional field of dynamic regulation in the core of inductor, and the additional field in core so that produce
The mode that raw resultant magnetic field reduces on itself AC and DC component and the magnetic field phase interaction generated by the electric current for flowing through main winding
With.This realizes lot of advantages, such as the size of power converter, the possible reduction of weight and cost and/or its performance and can
By the raising of property.
Preferably, bias driver circuit includes：It is arranged to electric current I of the sensing by loadDCSensor, be arranged
The electric current I for passing through DC bus capacitors into sensingACSensor, be arranged to the electric current I sensed by biasing windingAUXBiography
Sensor and be arranged to use the value of sensed electric current change flow through biasing winding electric current device.
If by loading measured respectively with the electric current of DC bus capacitors and biasing winding for changing flowing through
Electric current can then be further improved the resultant magnetic field of inductor.
In preferred aspect, it is arranged to the dress for using the value of sensed electric current to change the electric current for flowing through biasing winding
Put including：It is arranged to certain gain GACWith phase shift to the I that is sensedACHandled and by handled electric current input to
The device of summing unit；It is arranged to certain gain GDCWith phase shift to the I that is sensedDCIt is handled and by handled electricity
Stream is inputted to the device of summing unit；Summing unit is arranged to and is summed to the electric current handled by the two and by result
It inputs to amplifier；Amplifier is arranged to gain GOUTElectric current through summation process is amplified while passes through reduction
The I sensedAUXElectric current is corrected the output signal of amplifier；It is electrically coupled to biasing winding, being arranged to makes to locate completely
The electric current of reason is by biasing winding.
By being appropriately arranged with IACAnd IDCThe gain and phase shift of value can be obtained to the further notable of entire circuit performance
It improves.
Preferably, main winding and biasing winding are connected to input power together, and bias driver circuit only can be from
Input power draws electric current.
It is which ensure that simple in structure so that biasing winding is powered from the power supply identical with main winding, and without using
Individual power supply generates less expensive circuit, and the operation of bias driver circuit is limited in the quadrant of its magnetization curve
Region in Q1 and Q2：That is, the alternating voltage at monopolar current and biasing winding both ends.
According to second aspect, it is arranged to the dress for using the value of sensed electric current to change the electric current for flowing through biasing winding
It puts including switching converter circuit.
Switching converter circuit is covered and enables this circuit to be designed to consumption in bias driver circuit relatively
A small amount of power.Monopolar current requirement representation can utilize simple switch topology.To the alternating voltage at biasing winding both ends
It is required that dc-dc converter as representing should can work under the input voltage higher or lower than its output voltage.
Optionally, being arranged to the device for using the value of sensed electric current to change the electric current for flowing through biasing winding includes
Sepic converter SEPIC.Preferably, it is arranged to and the value of sensed electric current is used to flow through biasing winding to change
The device of electric current include：With the electronic switch that impulse modulation drives, by the output terminal for biasing winding and fly across (flying)
The positive side of capacitor is electrically coupled to the negative terminal of power supply；Modulator is used for the I to being sensedAC、IDCAnd IAUXElectric current carries out
Modulation, and carry out driving switch using the result of modulation；Main switch diode is connected simultaneously with auxiliary high frequency SEPIC inductors
It is in parallel with DC bus capacitors, the output terminal of main winding is connected to the negative terminal of power supply, flying capacitor will bias around
The output terminal and switch of group are electrically coupled to the input terminal of diode and auxiliary high frequency SEPIC inductors.
Preferably, with certain impulse modulation for being modulated according to the principles of signal processing of first aspect come driving switch.
Optionally, SEPIC electronic switches are MOSFET or IGBT types.
Preferably, DC choke coils include the ferromagnetic core being closed.Core can be made of cheap ferromagnetic material such as electrical sheet.
Description of the drawings
Preferred embodiment is will now be described with reference to the attached figures, wherein：
Fig. 1 a are the diagrams of custom circuit.
Fig. 1 b are the corresponding magnetization curves of custom circuit.
Fig. 2 a are the diagrams of enhanced DC choke circuits.
Fig. 2 b are the corresponding magnetization curves of enhanced DC choke circuits.
Fig. 3 is the diagram of the bias driver circuit in enhanced DC choke circuits.
Fig. 4 is the diagram of the bias driver circuit comprising SEPIC in enhanced DC choke circuits.
Fig. 5 is the diagram of the harmonic of custom circuit and new enhanced DC choke circuits.
Specific embodiment
Reference Fig. 2 a show the preferred embodiment of enhanced DC choke circuits.Enhanced DC choke circuits include：
Enhanced DC choke coils 220, DC bus capacitors 240, soft starting device 260 and bias driver circuit 230.
Enhanced DC choke circuits are electrically coupled to input power 200 and load 280.Input power 200 is three phase rectifier AC
Power supply, AC power supplies in addition or DC power supply or any combination of AC power supplies and DC power supplys.Load 280 represents that electronic power turns
The load of parallel operation type.
The negative terminal of power supply 200 is electrically coupled to the negative potential terminal of DC bus capacitors 240 and born by soft starting device 260
It carries.
The inductor 220 of enhanced DC choke circuits includes two windings, main winding 250 and biasing winding 270.Main winding
250 one side is electrically coupled to input power 200, and the opposite side of main winding 250 is electrically coupled to loading 280 DC buses in parallel
The positive potential side terminal of capacitor 240.
The one side of biasing winding 270 is electrically coupled to input power 200, and the opposite side for biasing winding 270 is electrically coupled to partially
Set driver circuit 230.
The electric current for flowing through main winding 250N1 is I1.Bias driver circuit 230 can be drawn by biasing winding 270N2
Electric current I2.
Umber of turn ratio is：Ktr=N2/N1 { F1 }
The theoretic full remuneration condition in the magnetic field in inductor is：
N1 × I1=N2 × I2 { F2 }
Therefore, I2=I1 × N1/N2=I1/Ktr {F3}
In general, the number of turn in arrangement winding so that N2>>N1, i.e. Ktr>>1；This allows bias current I2<<I1.However, such as
Fruit always sets I2 like that just like above-mentioned equation { F2 }, then completely without generating resultant magnetic field in core, therefore in circuit
It can't see inductance：That is L1=0.
Alternately, the series current that the sensing of bias driver circuit 230 passes through load 280.Load current is usually main
Include the DC components that can be largely compensated.And by the real-time sensing to load current and to the proper treatment of signal put
Greatly, bias driver circuit 230 uses sensed electric current to be formed the additional field of dynamic regulation in the core of inductor, is somebody's turn to do
Additional field so that the magnetic field generated in the core of inductor reduce on itself AC and DC component mode with by flow through it is main around
The magnetic field interaction that the electric current of group 250 generates.
The main problem of custom circuit shown in Fig. 1 a is to cause big current ripple, and the magnetization carried in Figure 1b is bent
On line (also referred to as hysteresis loop or BH curve), these ripples are illustrated as the big (shadow part of curve of monopole wobble area 110
Point).Bias driver circuit 230 have Fig. 2 b in BH curve shown in effect, wherein shade wobble area 210 compared with
Zero crossing becomes symmetrical.This realizes at least 2 times of the surplus in the magnetic field in the core of inductor.
If the electric current I that sensing passes through load 280 respectivelyDCWith the electric current I by DC bus capacitors 240AC, then can be with
Further improve the performance of circuit.
According to Kirchhoff's current law (KCL), I1=IDC+IAC {F4}
Illustrate the embodiment referring to Fig. 3.
Fig. 3 is the diagram of the bias driver circuit in enhanced DC choke circuits.Bias driver circuit 330 includes：
IDCSensor 385, IACSensor 345, IAUXSensor 375, IACProcessing unit 331, IDCProcessing unit 332, summing unit 333
And amplifier 334.
Enhanced DC choke circuits are electrically coupled to input power and load 380.Input power is three phase rectifier AC power supplies, separately
Outer AC power supplies or any combination of DC power supply or AC power supplies and DC power supply.Load 380 represents electronic power converter type
Load.Input power is not known in Fig. 3 to be illustrated, but is wrapped as being connected with "+" with the signal of "-" polarity sign
It includes.In general, these polarity can exchange, as long as not connecting the component of other polar sensitives in circuit；For example, work as C2
When polarized capacitor 340 overturns or be replaced by nonpolar type, when loading 380 overturning etc..
Bias driver circuit includes：It is arranged to electric current I of the sensing by load 380DCIDCSensor 385, by cloth
It is set to electric current I of the sensing by DC bus capacitors 340ACIACSensor 345 is arranged to sensing by biasing winding 370
Electric current IAUXIAUXSensor 375.
Electric current can be sensed using any appropriate sensor that can continuously sense electric current.Alternately, can survey
Other circuit parameters in circuit at desired point are measured to calculate the electric current at the desired point.
The I sensedACDevice 331 is input to, which is arranged to certain gain GACWith phase shift to the electricity
Stream is handled and is inputted handled electric current to summing unit 333.The I sensedDCDevice 332 is input to, the device
332 are arranged to certain gain GDCThe electric current is handled with phase shift and is inputted handled electric current to summing unit
333.The two devices can be any kind of amplifier or suitable for the electric current application certain gain sensed and phase shift
Component.
Summing unit 333, which is arranged to, to be summed to the electric current handled by the two and is inputted result to amplifier
334.Any appropriate component for summing to the two electric currents can be used.
Amplifier 334 is arranged to gain GOUTElectric current through summation process is amplified, while is felt by reducing
The I of surveyAUXElectric current exports signal to it and is corrected.Amplifier 334 is electrically coupled to biasing winding 370.
By being appropriately arranged with IACAnd IDCThe gain and phase shift of value can obtain the further of entire circuit performance and significantly carry
It is high.
As any reactive components, any energy will not be consumed by biasing winding 370 and main winding 350, and simply in spy
Make energy " bounce (bounce) " around datum line during the fixed signal period；In the feelings without considering the ohmic loss in winding
Under condition, really so.This represents that electric energy should can be pushed to ferromagnetic core (or other materials by the output stage of bias driver circuit
The core of material) or circuit other parts and draw electric energy from ferromagnetic core (or core of other materials) or the other parts of circuit.
Therefore, bias driver circuit should represent so-called two quadrant transducer type, the wherein operating space of bias driver circuit
Domain should occupy at least one P>The quadrant and at least one P of 0 (storage energy)<The quadrant of 0 (releasing energy).
In the case of many practical applications, input power only allows electric current to flow out the power supply, and cannot receive any electricity
Stream is flow back into the power supply：Consider such as three-phase rectifier power supply or battery photovoltaic array as input power in the case of,
Really so.
Fig. 2 a show the left end of both the main winding 250 for being connected to input power 200 together and biasing winding 270；This
It is in order to simple in structure that sample, which is done, so that biasing winding 270 is powered with main winding 250 from identical power supply, and without using independent
Power supply.Connection in this way, bias driver circuit 230 can only be allowed to draw electric current from input power 200, and cannot
Electric current is pushed in a reverse direction.The operation of bias driver circuit is limited in the area in quadrant Q1 and Q2 by connection arrangement
Domain：The alternating voltage at 270 both ends of monopolar current and biasing winding.
, instead of output stage shown in Fig. 3, actually can by considerable feasible dc-dc converter type circuit
One group of operation mode as realization.Switching converter circuit is covered and ensures and is biasing in bias driver circuit 330
The relatively small power of consumption in drive circuit 330 itself.Monopolar current requirement representation can utilize simple switch topology.It is right
Biasing dc-dc converter as the requirement expression of the alternating voltage at 370 both ends of winding should can export higher or lower than it
It works under the input voltage of voltage.
It is referred to as SEPIC (lists in the literature as an example, being shown in FIG. 4 and being connected in bias driver circuit
Hold primary inductance converter) dc-dc converter, this will be discussed in further detail below.
Circuit includes electronic switch 438, " quick " capacitor 436, modulator 439, auxiliary high frequency SEPIC inductors 437
And main switch diode 435.
Certain impulse modulation adjusted using the principles of signal processing that illustrates in the embodiment according to Fig. 3 is (such as fixed
Frequency pulse width modulated or pulse frequency modulated or the modulation of variable frequency retarded type etc.) drive electronic switch 438, wherein,
Modulator uses sensed IAUX、IDCAnd IACElectric current.
Switch 438 will bias the output terminal of winding 470 and the positive side of flying capacitor 436 is electrically coupled to the negative pole end of power supply
Son.
Main switch diode 435 is connected with auxiliary high frequency SEPIC inductors 437, they are in parallel with capacitance 440, will it is main around
The output terminal of group 450 is connected to the negative terminal of power supply.Flying capacitor 436 will bias the output terminal and switch of winding 470
438 are electrically coupled to the input terminal of diode 435 and auxiliary high frequency SEPIC inductors 437.
The left end of 470 the two of main winding 450 and biasing winding is shown as identical in the mode in the embodiment with Fig. 3
Mode link together.Since the electric current in main winding 450 and biasing winding 470 can only flow in same direction, so
If the point near each winding is discribed, the winding terminal of biasing winding 470 is exchanged compared with the winding terminal of main winding 450.
By this connection, generated bias-field offsets home court.
Bias driver circuit may be implemented as one in 2 quadrant switches converters of various possible types in practice
Kind；Its non-exhaustive list includes such as sepic converter (SEPIC)；Boosting and (or) decompression single-ended converter；It is single
Hold flyback converter；Arbitrary double-ended converter with or without so-called synchronous rectification ability etc..
Parameter KtrThe reciprocal value of { F1 } defines the general power handling capacity P handled by bias driver circuitTOTFraction, because
The rated power P of this bias driver circuitAUXFor：
PAUX=PTOT/(Ktr+1) {F5}
In the case of without considering AC current components (that is, the average value of power), equation { F5 } is accurate.According to GAC
It is worth (Fig. 3) and passive component value, the peak power handled by bias driver circuit can be higher by 30%-50%.
Apparently according to { F5 }, KtrValue is higher, and the opposite rated power and absolute rated power of bias driver circuit are lower.
However, in the presence of to KtrThe actual limitation of value, mainly the AC component of voltage existing for 450 both ends of main winding limit.Due to coupling
The transformer action of the inductor of conjunction, voltage of the AC component of voltage at 470 both ends of biasing winding are multiplied by factor Ktr, so as to
Higher rated voltage requirement is proposed to the output stage of bias driver circuit.
As the actual example for illustrating this point, the input power of three-phase rectifier power supply type can be defeated with its is superimposed upon
Go out the AC voltage pulses in D/C voltage, be to be measured at 450 both ends of main winding compared with the absolute DC values of filtered voltage waveform
Value at least 11% (peak value).For example, if it is 400V to input alternate RMS voltageAC, then the absolute DC of filtered voltage waveform
Value will be about 540V, and the peak AC voltage at 450 both ends of main winding will be about 60V.In addition, if selected value
Ktr=8, then for the identical DC voltage component of 540V, the peak AC voltage at 470 both ends of biasing winding will increase to about 480V.
This represents the bias driver circuit if selected for SEPIC types, then the rated voltage of switch and diode part reaches phase
When the value of high 1500V to 1700V.These rated values are defined to the K in particular electrical circuittrValue actual limitation.
Enhanced DC choke coils can be used for power supply electronic filtering, and power supply electronic filtering is suitable for various electronic power supplies and turns
Parallel operation type, including motor driver, uninterruptible power supply, renewable energy source converter, AC to DC power supply, DC to DC power supply, electricity
Sub- battery charger etc..
In above-described embodiment, bias driver circuit can dynamically reduce the magnetic field in the core of inductor
Both low frequency AC and DC components, so as to release significant surplus in one or more parameters of inductor.As a result, this
It realizes one or more in advantages below：
- compared with the inductor (by reducing core air gap) of the identical size used in conventional filter circuit, per identical
Rated current can obtain the inductance more than several times；
- compared with the inductor of the identical size used in Conventional filters circuit (by reducing core air gap and main winding
In the number of turn), identical inductance can be obtained per increased rated current；
- compared with the inductor used in Conventional filters circuit, it can be obtained using reduced size and the inductor of weight
Per the identical inductances of same nominal electric current；
Enhanced DC choke coils can also reduce the Q factor that the SRT circuits of its participation generate, so as to improve entire circuit pair
The dynamic transient response of input power Spline smoothing or load current step situation of change.Compared with Conventional filters circuit, even if institute
It is also such that the size and capacitance of the DC bus capacitors used, which reduce,.This realizes the additional saving to system dimension and cost
Improve system performance simultaneously.
Compared with Conventional filters circuit, enhanced DC choke coils are operated as follows, and which so that its reduction is whole
RMS current in all important components of a circuit.When by the input power (such as three comprising both DC and AC component of voltage
Commutating phase power supply) power supply when, this is especially apparent.The fact is realized：
- make RMS rated current needed for the rectifier diode or thyristor of Conventional filters circuit reduce about four/
One, and the size of the cooling fin of rectifier is made accordingly to reduce；
- make the main winding of the power connector of Conventional filters circuit, connecting cable, electric wire, busbar and DC choke coils
Required RMS rated current reduce about a quarter；
- fill soft starter device (relay, thyristor etc.)-also referred to as surge current limitation of conventional filter circuit
Put-required RMS rated current reduce about a quarter；
- reduce RMS rated current needed for the DC bus capacitors of conventional filter circuit (also referred to as ripple rated current)
More than 70%, therefore cause its spontaneous heating less, so as to improve the service life of component, which generally define and which use
The useful service life of the entirety of the whole equipment of the component；
- save for electric current conduction, radiate, the corresponding cost of the raw material of ferromagnetic core (copper, aluminium, electrical sheet etc.), and
Reduce the rated value needed for other passive and active components；And
The global reliability of the entire circuit of-raising.
When being powered by three-phase rectifier power supply, enhanced DC choke coils improve total mistake of the electric current consumed from three-phase AC power source
True power factor (DPF), is usually improved from the 0.70-0.75 found in conventional filter circuit to 0.93-0.95.This is represented
Enhanced DC choke coils can effectively serve as power factor corrector (PFC) circuit.Pfc circuit can use conventional inductor
And manufactured without using any active electronic component, and it is referred to as " passive PFC circuit ".Alternately, pfc circuit can pass through
Special electronic converter circuit manufactures；In this case, it is referred to as " active PFC circuit ".Here the inductor proposed
Device includes both passive inductors and active electronic circuit, accordingly acts as " semi-active pfc circuit ".Compared in active PFC
100% general power handling capacity is handled in circuit, the bias driver circuit of enhanced DC choke coils only handles general power handling capacity
Relatively small portion.
When being powered by three-phase rectifier power supply, enhanced DC choke coils can be provided to the electricity from three-phase AC electrical source consumptions
The improved current harmonics filtering of stream.This is the direct result of improved DPF, and by reducing additional special harmonic
The size of device allows to save other cost in electronic system.In many cases, it can meet harmonic content regulation,
Without any additional means of filtering.Fig. 4 is shown by custom circuit (501,503,505,507 and 509) and new proposition
Circuit (500,502,504, the 506,508) representative value of the low harmony wave content of electric current that consumes from 3 phase 50Hz AC power supplies show
Example.
Transverse axis shows frequency hertz, and vertical pivot shows ampere.The harmonic wave of the multiple for 3 is not present herein
Number, this represents the three phase mains situation of balance.The leftmost peak being superimposed almost ideally at 29A, 501 and 500 is 50Hz
Main power source harmonic wave.Lower a pair of peak value is 5 subharmonic at 250Hz, and wherein peak value 502 numerically reduces than peak value 503
About 2.1 times (10.4A and 22A).This at 350Hz shows the seventh harmonic peak value most significant from 15.9A to 1.57A
Reduce and (reduce 10 times or more).This at 550Hz shows 11 subharmonic the reduction of about 2.2 times (5.8A and 2.6A).
This at 650Hz shows 13 subharmonic the reduction of about 6.3 times (2.9A and 0.46A).The circuit proposed will not be as to low
Subharmonic is like that effectively filtered high harmonic content (not shown)；However, their absolute content is much lower.Always
For body, in the given example, the total harmonic distortion (THD) of the AC electric currents consumed is about 94% for custom circuit,
And the novel circuit for being proposed is about 38%.
Special bias driver circuit be represented as by bias driver circuit and enhanced DC choke coils processing it is total
The rated power of a part for power throughput depends primarily upon any AC component of voltage present in input voltage.In general, 6
In the case of pulse three phase rectifier power source, which is 1st/10th to ten/5th of general power handling capacity, i.e. total work
The 20% to 10% of rate handling capacity.When entire circuit is by DC power supply (electronic cell, solar energy photovoltaic panel when) power supply, this
Percentage can be with smaller.Therefore, for required general power handling capacity, ac input voltage component is lower, special biasing driving
The rated power of device circuit is smaller.
To those skilled in the art, other change and modification will be apparent from.Such change and modification can relate to
And equivalent feature or other features, these features are known and can substitute features described herein use or additional
Ground uses.In the context of different embodiments, described in feature can be in combination provided in single embodiment.
On the contrary, the feature described in the context of single embodiment can also be carried individually or with any suitable sub-portfolio
For.It should be noted that term " comprising " is not excluded for other elements or step, "one" is not excluded for multiple term, and single feature can be with
It realizes the function for the several features stated in claim, and is not necessarily to be construed as limiting in the reference numeral in claim
The scope of claim.It shall also be noted that attached drawing is not necessarily to scale；But usually lay stress on present disclosure
In principle.
Claims (10)
1. a kind of circuit for being filtered to the signal from power supply, including：
The capacitor in parallel with load；
Core；
Around the main winding of the core, wherein, the one side of the main winding is electrically coupled to the power supply, and the main winding
Opposite side is electrically coupled to the capacitor；
Around the biasing winding of the core；And
Bias driver circuit is arranged to the electric current by the biasing winding according to output current control.
2. circuit according to claim 1, wherein, the bias driver circuit includes：It is arranged to sensing and passes through institute
State the electric current I of loadDCSensor, be arranged to sensing and pass through the electric current I of DC bus capacitorsACSensor, be arranged to
The electric current I that sensing passes through the biasing windingAUXSensor and be arranged to use the value of sensed electric current change stream
The device of electric current through the biasing winding.
3. circuit according to claim 2, wherein, the bias driver circuit includes：
It is arranged to certain gain GACWith phase shift to the I that is sensedACThe device handled；
It is arranged to certain gain GDCWith phase shift to the I that is sensedDCThe device handled；
Summing unit is arranged to handled IACAnd IDCIt sums to provide summation output；
Amplifier, be arranged to receive the summing unit summation output and with gain GOUTTo the electric current through summation process
It is amplified, while by reducing sensed IAUXElectric current is corrected to provide amplifier come the output signal to amplifier
Output；And
To being electrically coupled for the biasing winding, it is arranged to and exports to control through the biasing winding according to the amplifier
Electric current.
4. circuit according to any one of claim 1 to 3, wherein, the biasing winding coupled to the power supply.
5. circuit according to any one of claim 1 to 3, wherein, the bias driver circuit includes switch conversion
Device circuit.
6. circuit according to any one of claim 1 to 3 further includes sepic converter SEPIC.
7. circuit according to any one of claim 1 to 3, wherein, the bias driver circuit is included coupled to institute
State the switch of the output terminal of biasing winding.
8. circuit according to claim 7, wherein, the switch is driven in a manner of pulse modulated.
9. circuit according to claim 8, wherein, the switch is MOSFET or IGBT types.
10. circuit according to any one of claim 1 to 3, wherein, the core includes the ferromagnetic core being closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721008708.7U CN207459985U (en) | 2017-08-11 | 2017-08-11 | For the circuit being filtered to the signal from power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721008708.7U CN207459985U (en) | 2017-08-11 | 2017-08-11 | For the circuit being filtered to the signal from power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207459985U true CN207459985U (en) | 2018-06-05 |
Family
ID=62249201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721008708.7U Expired - Fee Related CN207459985U (en) | 2017-08-11 | 2017-08-11 | For the circuit being filtered to the signal from power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207459985U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301268A (en) * | 2020-10-08 | 2022-04-08 | 美国亚德诺半导体公司 | Dynamic biasing techniques for current sensing based on enhanced MOSFET on-resistance |
-
2017
- 2017-08-11 CN CN201721008708.7U patent/CN207459985U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301268A (en) * | 2020-10-08 | 2022-04-08 | 美国亚德诺半导体公司 | Dynamic biasing techniques for current sensing based on enhanced MOSFET on-resistance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2558945C2 (en) | Ultra-high efficiency switching power inverter and power amplifier | |
| US9906169B1 (en) | DC-AC conversion circuit having a first double ended DC pulse stage and a second AC stage | |
| JP5134631B2 (en) | Method for controlling an almost completely inductive load and device applying the method | |
| TW201212499A (en) | Grid-tie inverter | |
| CN106981990B (en) | Unidirectional isolation type multistage direct current-direct current electric energy conversion device and method thereof | |
| Hausmann et al. | Three-phase DC–AC converter using four-state switching cell | |
| Rituraj et al. | Analysis and comparison of series-series and series-parallel topology of contactless power transfer systems | |
| CN114362565A (en) | Boost rectifier | |
| CN108023411B (en) | Single-phase non-contact power supply system with power factor correction function | |
| Balakrishnan et al. | Soft switched ac link buck boost converter | |
| KR20190115364A (en) | Single and three phase combined charger | |
| Rozario et al. | A modified resonant converter for wireless capacitive power transfer systems used in battery charging applications | |
| US20060239039A1 (en) | Switching power supply circuit | |
| CN103765754A (en) | Inverter with coupled inductances | |
| US20140204614A1 (en) | Rectified high frequency power supply with low total harmonic distortion (thd) | |
| CN112350583B (en) | Current type push-pull bridge type soft switch bidirectional direct current converter | |
| CN105958809A (en) | Filter with coupled inductor and parameter determining method of filter | |
| Ahmed et al. | Empirical Investigation of a Single-Phase New Topology Hybrid AC-DC Boost Converter with Low THD and High-Power Factor | |
| CN207459985U (en) | For the circuit being filtered to the signal from power supply | |
| Prakash et al. | High-efficiency improved 12kW switched mode telecom rectifier | |
| Patil et al. | Comparative Study of Single-phase Power Factor Correction Topologies for Electric Vehicle Battery Charger Based on Boost Converter | |
| CN205901578U (en) | Wave filter with coupling inductance | |
| Bagawade et al. | Interleaved boost based AC/DC bidirectional converter with four quadrant power control based on one-cycle controller (OCC) | |
| Siu et al. | Operation of combined HF and LF Boost stage inductors in PFC Design | |
| CN213937741U (en) | Bridgeless PFC circuit based on three-phase coupling inductor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180605 Termination date: 20200811 |