CN107257194A - A kind of controlled resonant converter - Google Patents
A kind of controlled resonant converter Download PDFInfo
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- CN107257194A CN107257194A CN201710703224.2A CN201710703224A CN107257194A CN 107257194 A CN107257194 A CN 107257194A CN 201710703224 A CN201710703224 A CN 201710703224A CN 107257194 A CN107257194 A CN 107257194A
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- resonant converter
- controlled resonant
- rectifier bridge
- signal
- thermal compensation
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- 230000005611 electricity Effects 0.000 claims description 10
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- 230000000875 corresponding effect Effects 0.000 description 2
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- 239000007924 injection Substances 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4241—Arrangements for improving power factor of AC input using a resonant converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
This application discloses a kind of controlled resonant converter, including rectifier bridge, bus capacitor, switch element, resonant network, control unit and dividing cell, wherein：The positive output terminal of rectifier bridge connects one end of bus capacitor；The input side of switch element bus capacitor in parallel；The lead-out terminal of switch element connects the positive input terminal of resonant network；The negative input terminal of resonant network connects the negative output terminal of rectifier bridge；Dividing cell is shunted to positive resonance current and provides path for reverse resonance current；Control unit produces driving control signal according to the sampled signal of thermal compensation signal and sign controlled resonant converter output parameter, exports the control end of the switching tube into switch element；The signal of working frequency, reduction controlled resonant converter working frequency rectifier bridge input voltage peak value and valley at of the thermal compensation signal for instruction control unit rise controlled resonant converter at rectifier bridge input voltage zero crossing.The application improves the PF values of controlled resonant converter.
Description
Technical field
The present invention relates to electric and electronic technical field, more specifically to a kind of controlled resonant converter.
Background technology
Controlled resonant converter has smaller switching loss compared to traditional pwm converter, thus is widely used.
Specifically：Controlled resonant converter is that, using resonance circuit as basic transformation unit, when occurring resonance using circuit, curtage is all
Phase property ground zero crossing so that switching device is opened or turned off under the conditions of no-voltage or zero current, so that Sofe Switch is realized,
Reach the purpose of reduction switching loss.
PFC (Power Factor Correction, PFC) technology of controlled resonant converter is power electronics skill
The heat subject of art area research.PF (Power Factor, power factor) value of controlled resonant converter is lower to increase power network
Loss.In the prior art, in order to improve the PF values of controlled resonant converter, two-stage type structure is often designed to, prime is PFC electricity
Road, rear class is resonant transform circuit, still, two-stage type complex structural designs, and cost is high, a kind of using single it is therefore necessary to design
Level formula structure and the high controlled resonant converter of PF values.
The content of the invention
In view of this, the invention provides a kind of controlled resonant converter, it uses single stage type structure and PF values are high, and scheme is such as
Under：
A kind of controlled resonant converter, including rectifier bridge, bus capacitor, switch element, resonant network, control unit and shunting are single
Member, wherein：
The positive output terminal of the rectifier bridge connects one end of the bus capacitor；
The input side of the switch element bus capacitor in parallel；
The lead-out terminal of the switch element connects the positive input terminal of the resonant network；
The negative input terminal of the resonant network connects the negative output terminal of the rectifier bridge；
The dividing cell is connected between the negative output terminal of the resonant network and the bus capacitor, for aligning
To resonance current shunted and provide path for reverse resonance current；
Described control unit receives thermal compensation signal and characterizes the sampled signal of the output parameter of the controlled resonant converter, and root
Driving control signal is produced according to the thermal compensation signal and the sampled signal, the driving control signal exports single to the switch
The control end of switching tube in member；Wherein, the thermal compensation signal exists to indicate that described control unit raises the controlled resonant converter
Working frequency, the reduction controlled resonant converter at the rectifier bridge input voltage zero crossing is at the rectifier bridge input voltage peak
The signal of working frequency at value and valley.
Wherein, described control unit includes frequency control module and comparison module, specifically：
The comparison module receives the sampled signal, for the sampled signal to be made comparisons with default reference signal
Produce feedback signal；
The frequency control module receives the feedback signal and the thermal compensation signal, for according to the feedback signal and
The thermal compensation signal produces driving control signal.
Wherein, the switch element includes the first switch pipe and second switch pipe of series connection, specifically：
Second end of the first end of the first switch pipe and the second switch pipe is the input side of the switch element；
Second end of the first switch pipe is connected with the first end of the second switch pipe, is used as the output end of the switch element
3rd end of son, the first switch pipe and the second switch pipe is the control of the first switch pipe and the second switch pipe
End processed.
Wherein, the controlled resonant converter is LLC resonant converter；
The LLC resonant converter includes resonant inductance, resonant capacitance and magnetizing inductance；One end of the resonant inductance connects
The lead-out terminal of the switch element is connect, the other end connects one end of the magnetizing inductance；The other end of the magnetizing inductance connects
One end of the resonant capacitance is connect, the other end of the resonant capacitance connects the negative output terminal of the rectifier bridge.
Wherein, the dividing cell includes diode and the first electric capacity, specifically：
The negative electrode of the diode connects the negative output terminal of the rectifier bridge, and the anode of the diode connects the mother
The negative terminal of line capacitance；First electric capacity and the diodes in parallel.
Or, the dividing cell includes the 3rd electric capacity of diode, specifically：
The negative electrode of the diode connects the negative output terminal of the rectifier bridge, and the anode of the diode connects the mother
The negative terminal of line capacitance；
One end of 3rd electric capacity connects the negative electrode of the diode, and the other end of the 3rd electric capacity connects the mother
The hot end of line capacitance.
Optionally, the dividing cell also includes the 4th electric capacity, the 4th electric capacity and the diodes in parallel.
Wherein, the output result of the frequency control module is the size of working frequency of the controlled resonant converter and described
The amplitude of thermal compensation signal is negatively correlated；
Corresponding, the amplitude of the thermal compensation signal is minimum at the rectifier bridge input voltage zero crossing, in the rectification
Highest at bridge input voltage peak value and valley；The frequency of the thermal compensation signal and the controlled resonant converter input voltage frequency phase
Together.
Or, the output result of the frequency control module is the size of the working frequency of the controlled resonant converter and described
The amplitude positive correlation of thermal compensation signal；
It is corresponding, the amplitude of the thermal compensation signal highest at the rectifier bridge input voltage zero crossing, in the rectification
It is minimum at bridge input voltage peak value and valley；The frequency of the thermal compensation signal and the controlled resonant converter input voltage frequency phase
Together.
Wherein, the output result of the frequency control module is the size of working frequency of the controlled resonant converter and described
The amplitude positive correlation of thermal compensation signal；The thermal compensation signal is obtained at the negative electrode of the diode.
It can be seen from above-mentioned technical scheme that, the present invention for controlled resonant converter by introducing dividing cell come humorous to forward direction
The electric current that shakes is shunted and provides path for reverse resonance current, so that controlled resonant converter input current is changed into depositing from square wave
In the sine wave necessarily distorted, and reduced by introducing thermal compensation signal or even eliminate this distortion, so that current resonance
Converter input current is more nearly sine wave, improves the PF values of controlled resonant converter.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of controlled resonant converter structural representation disclosed in the embodiment of the present invention；
Fig. 2 is a kind of dividing cell structural representation applied to controlled resonant converter shown in Fig. 1 disclosed in the embodiment of the present invention
Figure；
Fig. 3 is that another disclosed dividing cell structure for being applied to controlled resonant converter shown in Fig. 1 of the embodiment of the present invention is shown
It is intended to；
Fig. 4 is that another disclosed dividing cell structure for being applied to controlled resonant converter shown in Fig. 1 of the embodiment of the present invention is shown
It is intended to；
Fig. 5 is a kind of controlled resonant converter structural representation disclosed in prior art；
Fig. 6 is the current waveform figure of controlled resonant converter shown in Fig. 5；
Fig. 7 is the voltage of controlled resonant converter, current waveform figure shown in Fig. 5；
Fig. 8 is the structural representation that controlled resonant converter shown in Fig. 5 is accessed after dividing cell shown in Fig. 2；
Fig. 9 is the voltage oscillogram of controlled resonant converter shown in Fig. 8；
Figure 10 is the current waveform figure of controlled resonant converter shown in Fig. 8；
Figure 11 is the current waveform figure of controlled resonant converter shown in Fig. 2；
Figure 12 is a kind of control unit structural representation applied to controlled resonant converter shown in Fig. 1 disclosed in the embodiment of the present invention
Figure.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Referring to Fig. 1, the embodiment of the invention discloses a kind of controlled resonant converter, including rectifier bridge 100, bus capacitor C2, open
Unit 200, resonant network 300, control unit 400 and dividing cell 500 are closed, wherein：
The positive output terminal connection bus capacitor C2 of rectifier bridge 100 one end；
The input side of switch element 200 bus capacitor C2 in parallel；
The lead-out terminal of switch element 200 connects the positive input terminal of resonant network 300；
The negative input terminal of resonant network 300 connects the negative output terminal of rectifier bridge 100；
Dividing cell 500 is connected between the negative output terminal of resonant network 300 and bus capacitor C2, for forward direction
Resonance current ILr(resonance current is high frequency electric, and the resonance current under high frequency period is designated as I by the present embodimentLr, resonance current
ILrPositive direction as shown by the arrows in Figure 1；Resonance current ILrActual direction it is identical with the positive direction when for positive resonance electricity
Flow ILr, resonance current ILrActual direction it is opposite with the positive direction when for reverse resonance current ILr) shunted and be anti-
To resonance current ILrPath is provided；
Control unit 400 receives thermal compensation signal Ic and characterizes the sampled signal Is of the output parameter of the controlled resonant converter,
And driving control signal is produced according to thermal compensation signal Ic and sampled signal Is, the driving control signal is exported to switch element
The control end of switching tube in 200；Wherein, thermal compensation signal Ic raises the controlled resonant converter whole for instruction control unit 400
Flow the working frequency at the input voltage zero crossing of bridge 100, reduce the controlled resonant converter in the input voltage peak value of rectifier bridge 100 and
The signal of working frequency at valley.
It should be noted that the transformer and secondary circuit in controlled resonant converter are prior art, the present invention is not done to this
Illustrate and limit.
In above-mentioned controlled resonant converter disclosed in the embodiment of the present invention, switch element 200 can be using topology as shown in Figure 1
Structure, including the first switch pipe and second switch pipe (i.e. the upper, lower tube shown in Fig. 1) being in series, wherein：Described first opens
Close the input side of the first end of pipe and the second end of the second switch pipe for switch element 200；The of the first switch pipe
Two ends are connected with the first end of the second switch pipe, as the lead-out terminal of switch element 200, the first switch pipe and institute
State control end of the 3rd end of second switch pipe for the first switch pipe and the second switch pipe.
In above-mentioned controlled resonant converter disclosed in the embodiment of the present invention, the topological classification of resonant network 300 is not limited, Ke Yishi
LLC resonant networks, LCC resonant networks or other topological classifications, Fig. 1 are only used as example using LLC resonant networks.It is described in Fig. 1
LLC resonant elements include resonant inductance Lr, magnetizing inductance Lm and resonant capacitance Cr, wherein：Resonant inductance Lr one end connection is opened
Close the lead-out terminal of unit 200, other end connection magnetizing inductance Lm one end；Magnetizing inductance Lm other end connection resonant capacitance
Cr one end, the resonant capacitance Cr other end connects the negative output terminal of rectifier bridge 100.Herein it should be noted that excitation is electric
Sense Lm can be external inductance or be integrated in the transformer of the controlled resonant converter.
In above-mentioned controlled resonant converter disclosed in the embodiment of the present invention, dividing cell 500 can use following three kinds of topological classifications
In any one, be described in detail below：
1) the first topological classification of dividing cell 500 includes diode D1 and the first electric capacity C1；Diode D1 negative electrode
Connect the negative output terminal of rectifier bridge 100, diode D1 anode connection bus capacitor C2 negative terminal；First electric capacity C1 and two poles
Pipe D1 is in parallel, as shown in Figure 2；
2) second of topological classification of dividing cell 500 includes diode D1 and the 3rd electric capacity C3；Diode D1 negative electrode
Connect the negative output terminal of rectifier bridge 100, diode D1 anode connection bus capacitor C2 negative terminal；3rd electric capacity C3 one end
Diode D1 negative electrode is connected, the 3rd electric capacity C3 other end connects the hot end of the bus capacitor C2, as shown in Figure 3；
3) the third topological classification of dividing cell 500 is on the basis of second of topological classification in addition to the
Four electric capacity C4；4th electric capacity C4 is in parallel with diode D1, as shown in Figure 4.
Below, by taking Fig. 2 as an example, the operation principle of controlled resonant converter disclosed in the embodiment of the present invention is described in detail.
The structure of controlled resonant converter is as shown in figure 5, including rectifier bridge 100, bus capacitor C2, switch element in the prior art
200th, resonant network 300 and control unit 400, wherein：
The outlet side of rectifier bridge 100 bus capacitor C2 in parallel；
The input side of switch element 200 bus capacitor C2 in parallel；
The lead-out terminal of switch element 200 connects the positive input terminal of resonant network 300；
The negative input terminal of resonant network 300 connects the negative output terminal of rectifier bridge 100；
Control unit 400 receives the sampled signal Is for the output parameter for characterizing the controlled resonant converter, its signal output part
The control end of switching tube in connecting valve unit 200, for the switching tube in sampled signal Is controlling switches unit 200
Working frequency so that sampled signal Is reaches default reference signal.
Controlled resonant converter shown in Fig. 5 has three kinds of mode of operations, is f respectivelyr＜ fs＜ fo、fs=foAnd fs>foWhen correspondence
Mode of operation,fsFor the resonant frequency of resonant network 300.Below with fr＜ fs
＜ foExemplified by, the work wave of controlled resonant converter shown in analysis chart 5.
Resonance current I in controlled resonant converter shown in Fig. 5Lr(resonance current ILrPositive direction as shown by the arrows in Figure 5) and
The waveform of electric current of rectifier bridge 100 is flowed through respectively referring to the waveform B 1, B2 (Ts represents a switch periods) shown in Fig. 6, by
In only positive resonance current ILrRectifier bridge 100 can just be flowed through and reverse resonance current ILrRectifier bridge 100 can not be flowed through,
Therefore the electric current for flowing through rectifier bridge 100 is exactly resonance current I when current value is more than zeroLr。
Resonance current ILrFor high frequency electric, its frequency is identical with the working frequency of controlled resonant converter, flows through rectifier bridge 100
Positive resonance current is also high frequency electric, still, and influence PF values are the converter input voltage, electric currents under power frequency period
Waveform, specifically：In the case where the controlled resonant converter input voltage and output loading are constant, resonance current ILrIt is constant,
So the electric current for flowing through rectifier bridge 100 is also just constant, so the input current Iin of rectifier bridge 100 is square wave under power frequency period, such as scheme
(Vin in Fig. 7 represents the input voltage of rectifier bridge 100, is sine wave shown in 7；The input voltage of rectifier bridge 100, electric current are resonance
Converter input voltage, electric current).Known Iin and Vin waveform are closer to the PF values of controlled resonant converter are higher, and Vin is
Sine wave, so Iin is closer to sine wave, the PF values of controlled resonant converter are higher.But as shown in Figure 7, become in resonance shown in Fig. 5
In parallel operation, Iin is but square wave, so the PF values of controlled resonant converter shown in Fig. 5 are relatively low.
To improve the PF values of controlled resonant converter shown in Fig. 5, the present embodiment has accessed Fig. 1 in controlled resonant converter shown in Fig. 5
In the dividing cell 500 that shows, utilize 500 couples of positive resonance current I of dividing cellLrShunted.Become with resonance shown in Fig. 5
Accessed in parallel operation be the dividing cell 500 shown in Fig. 2 exemplified by, as shown in figure 8, positive resonance current ILrA part flows through
Rectifier bridge 100 (is designated as electric current Idc), and another part flows through the electric capacity C1 (being designated as electric current Id) in dividing cell 500, ILr=Idc+
Id；Diode D1 in dividing cell 500 is used for the resonance current I for ending forward directionLr, while diode D1 is reverse resonance electricity
Flow ILrPath is provided.
In fig. 8, Id flows through electric capacity C1 generation voltage Vd, now electric capacity C1 both end voltages Vd, bus capacitor C2 two ends electricity
Relational expression Vd=Vbus-Vdc is met between pressure Vbus, the outlet side voltage Vdc three of rectifier bridge 100.Vd, Vbus, Vdc waveform
As shown in Figure 9.
The shunting of dividing cell 500 is really high frequency shunting, envelope shape and Vd phase of its electric current under power frequency period
Together, and due to Idc=ILr- Id, then Idc, I under power frequency periodL(resonance current under power frequency period is designated as by the present embodiment
IL, with the resonance current I under high frequency periodLrDistinguish), Id, Iin waveform as shown in Figure 10, although the Iin in Figure 10 is than figure
Iin in 9 is closer to sine wave, but because Id DC component is very big, so Iin waveform still has distortion compared to sine wave.
But observation Figure 10 is can be found that, if it is possible to remove or reduce Id DC component, then the Iin obtained is just closer to sine wave.
To remove or reducing the DC component of Id in Figure 10, the present embodiment injecting compensating signal Ic is obtained to control unit 400
Controlled resonant converter as shown in Figure 2 is arrived.Injecting compensating signal Ic can change the working frequency of controlled resonant converter, so as to change resonance
Electric current ILr, and the working frequency for changing controlled resonant converter will not change Id (or Vd) waveform, so, the present embodiment injecting compensating
Signal Ic is to control unit 400 so that the working frequency of the controlled resonant converter is not only related to sampled signal Is, also and compensates
Signal Ic is related；In other words, control unit 400 can control controlled resonant converter according to sampled signal Is and thermal compensation signal Ic
Working frequency.Specifically, the thermal compensation signal Ic of injection needs to meet：The thermal compensation signal Ic of injection enables to the work of controlled resonant converter
Working frequency is and minimum in controlled resonant converter input voltage peak value and valley in controlled resonant converter input voltage zero crossing highest, from
And cause resonance current ILrIt is minimum in controlled resonant converter input voltage zero crossing, and in controlled resonant converter input voltage peak value and paddy
It is worth highest, therefore, the resonance current I under power frequency periodLAlso it is minimum in controlled resonant converter input voltage zero crossing, and become in resonance
Parallel operation input voltage peak value and valley highest, as shown in figure 11.
Referring to Figure 11, increase thermal compensation signal Ic does not change the current waveform of dividing cell 500, therefore is flowed through under power frequency period
The electric current Id waveforms of dividing cell 500 are constant, and increase the resonance current I after thermal compensation signal Ic under power frequency periodLWaveform changes
Become, so flowing through the electric current Idc waveform changes (Idc=I of rectifier bridge 100L- Id), now add rectification after thermal compensation signal Ic
The input current Iin of bridge 100 is more nearly sine wave, therefore the PF values of controlled resonant converter shown in Fig. 2 are higher, THD (Total
Harmonic Distortion, total harmonic distortion) it is lower.
Wherein, as shown in figure 12, control unit 400 specifically includes frequency control module 401 and comparison module 402；Compare
Module 402 is using sampled signal Is as input signal, for sampled signal Is to be made comparisons production with default reference signal Vref
Raw feedback signal；The control end of switching tube in the signal output part connecting valve unit 200 of frequency control module 401, its with
On the one hand the feedback signal that thermal compensation signal Ic and comparison module 402 are exported controls as input signal according to the feedback signal
The working frequency of controlled resonant converter in switch element 200, makes sampled signal Is be equal to reference signal, is on the other hand believed according to compensation
(working frequency of the switching tube in switch element 200 is exactly humorous to the working frequency of switching tube in number Ic controlling switches unit 200
Shake the working frequency of converter), to improve the controlled resonant converter PF values and THD.
Wherein, the output result of frequency control module 401 can be the working frequency of the controlled resonant converter size and
The width of the size and thermal compensation signal Ic of thermal compensation signal Ic amplitude positive correlation or the working frequency of the controlled resonant converter
Value is negatively correlated.
When the output result of frequency control module 401 is the size and thermal compensation signal of the working frequency of the controlled resonant converter
During Ic amplitude positive correlation, the thermal compensation signal Ic amplitude highest at the controlled resonant converter input voltage zero crossing, described
It is minimum at controlled resonant converter input voltage peak value and valley, thermal compensation signal Ic frequency and controlled resonant converter input voltage frequency
Rate is identical.Such as, thermal compensation signal Ic waveform can be made identical with Id (or Vd) or be directly proportional, then the resonance electricity under power frequency
Flow ILWaveform can become as shown in figure 11, now Idc DC component reduces so that the Iin added after thermal compensation signal Ic
Sine wave is more nearly, so as to improve PF values, THD is reduced.Now, in Fig. 2~Fig. 4, thermal compensation signal Ic can be from diode
Obtained at D1 negative electrode.
When the output result of frequency control module 401 is the size and thermal compensation signal of the working frequency of the controlled resonant converter
When Ic amplitude is negatively correlated, thermal compensation signal Ic amplitude is minimum at the controlled resonant converter input voltage zero crossing, described
Highest at controlled resonant converter input voltage peak value and valley, thermal compensation signal Ic frequency and controlled resonant converter input voltage frequency
Rate is identical.
In summary, the present embodiment is carried out by introducing dividing cell 500 for controlled resonant converter to positive resonance current
Shunt and provide path for reverse resonance current, so that controlled resonant converter input current is changed into the presence of certain distortion from square wave
Sine wave, and the present embodiment reduces or even eliminated this distortion by introducing thermal compensation signal Ic, so that electric current is humorous
The converter input current that shakes is more nearly sine wave, improves controlled resonant converter PF values and THD.
Finally it should be noted that switching and resonant network 300 and the dividing cell of the mode of operation of resonant network 300
The change of 500 topological classifications, all without the realization for changing above-mentioned technique effect, its analysis principle is identical, no longer goes to live in the household of one's in-laws on getting married one by one herein
State.
The embodiment of each in this specification is described by the way of progressive, and what each embodiment was stressed is and other
Between the difference of embodiment, each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can in other embodiments be realized in the case where not departing from the spirit or scope of the embodiment of the present invention.Therefore,
The embodiment of the present invention is not intended to be limited to the embodiments shown herein, and be to fit to principles disclosed herein and
The consistent most wide scope of features of novelty.
Claims (10)
1. a kind of controlled resonant converter, it is characterised in that single including rectifier bridge, bus capacitor, switch element, resonant network, control
Member and dividing cell, wherein：
The positive output terminal of the rectifier bridge connects one end of the bus capacitor；
The input side of the switch element bus capacitor in parallel；
The lead-out terminal of the switch element connects the positive input terminal of the resonant network；
The negative input terminal of the resonant network connects the negative output terminal of the rectifier bridge；
The dividing cell is connected between the negative output terminal of the resonant network and the bus capacitor, for forward direction
Resonance current is shunted and provides path for reverse resonance current；
Described control unit receives thermal compensation signal and characterizes the sampled signal of the output parameter of the controlled resonant converter, and according to institute
State thermal compensation signal and the sampled signal produces driving control signal, the driving control signal is exported into the switch element
Switching tube control end；Wherein, the thermal compensation signal raises the controlled resonant converter described for instruction described control unit
Working frequency at rectifier bridge input voltage zero crossing, reduce the controlled resonant converter in the rectifier bridge input voltage peak value and
The signal of working frequency at valley.
2. controlled resonant converter according to claim 1, it is characterised in that described control unit include frequency control module and
Comparison module, wherein：
The comparison module receives the sampled signal, for the sampled signal to be made comparisons generation with default reference signal
Feedback signal；
The frequency control module receives the feedback signal and the thermal compensation signal, for according to the feedback signal and described
Thermal compensation signal produces driving control signal.
3. controlled resonant converter according to claim 2, it is characterised in that the switch element includes the first switch of series connection
Pipe and second switch pipe, wherein：
Second end of the first end of the first switch pipe and the second switch pipe is the input side of the switch element；It is described
Second end of first switch pipe is connected with the first end of the second switch pipe, is used as the lead-out terminal of the switch element, institute
State control end of the 3rd end of first switch pipe and the second switch pipe for the first switch pipe and the second switch pipe.
4. controlled resonant converter according to claim 3, it is characterised in that the controlled resonant converter is LLC resonant converter；
The LLC resonant converter includes resonant inductance, resonant capacitance and magnetizing inductance；One end connection institute of the resonant inductance
The lead-out terminal of switch element is stated, the other end connects one end of the magnetizing inductance；The other end connection institute of the magnetizing inductance
One end of resonant capacitance is stated, the other end of the resonant capacitance connects the negative output terminal of the rectifier bridge.
5. controlled resonant converter according to claim 4, it is characterised in that the dividing cell includes diode and the first electricity
Hold, wherein：
The negative electrode of the diode connects the negative output terminal of the rectifier bridge, and the anode of the diode connects the bus electricity
The negative terminal of appearance；First electric capacity and the diodes in parallel.
6. controlled resonant converter according to claim 4, it is characterised in that the dividing cell includes the 3rd electricity of diode
Hold, wherein：
The negative electrode of the diode connects the negative output terminal of the rectifier bridge, and the anode of the diode connects the bus electricity
The negative terminal of appearance；
One end of 3rd electric capacity connects the negative electrode of the diode, and the other end of the 3rd electric capacity connects the bus electricity
The hot end of appearance.
7. controlled resonant converter according to claim 6, it is characterised in that the dividing cell also includes the 4th electric capacity, institute
State the 4th electric capacity and the diodes in parallel.
8. the controlled resonant converter according to any one of claim 1-7, it is characterised in that the frequency control module it is defeated
Go out the size for the working frequency that result is the controlled resonant converter and the amplitude negative correlation of the thermal compensation signal；
Corresponding, the amplitude of the thermal compensation signal is minimum at the rectifier bridge input voltage zero crossing, defeated in the rectifier bridge
Enter highest at voltage peak and valley；The frequency of the thermal compensation signal is identical with the controlled resonant converter input voltage frequency.
9. the controlled resonant converter according to any one of claim 1-7, it is characterised in that the frequency control module it is defeated
Go out the amplitude positive correlation of the size and the thermal compensation signal of the working frequency that result is the controlled resonant converter；
Corresponding, the amplitude of the thermal compensation signal highest at the rectifier bridge input voltage zero crossing is defeated in the rectifier bridge
Enter minimum at voltage peak and valley；The frequency of the thermal compensation signal is identical with the controlled resonant converter input voltage frequency.
10. the controlled resonant converter according to any one of claim 5-7, it is characterised in that the frequency control module
Output result is the amplitude positive correlation of the size and the thermal compensation signal of the working frequency of the controlled resonant converter；The compensation letter
Obtain number at the negative electrode of the diode.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021249332A1 (en) * | 2020-06-12 | 2021-12-16 | 英飞特电子（杭州）股份有限公司 | Charge pump control circuit and driving power source |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5559688A (en) * | 1993-05-19 | 1996-09-24 | 1,005,539 Ontario Inc. | Resonant power factor converter |
| US5598326A (en) * | 1994-02-10 | 1997-01-28 | Philips Electronics North America | High frequency AC/AC converter with PF correction |
| EP1164689A2 (en) * | 2000-06-16 | 2001-12-19 | FORFAS, (trading as PEI Technologies) | A single stage ac/dc converter |
| US6359395B1 (en) * | 2000-12-06 | 2002-03-19 | Fazle S. Quazi | Control circuit for power factor corrected electronic ballasts and power supplies |
| US20040136208A1 (en) * | 2002-10-21 | 2004-07-15 | Advanced Power Technology, Inc., A Delaware Corporation | Power converter method and apparatus having high input power factor and low harmonic distortion |
| US20110116290A1 (en) * | 2007-11-05 | 2011-05-19 | John Talbot Boys | Power control |
| CN106787675A (en) * | 2016-12-28 | 2017-05-31 | 成都芯源系统有限公司 | Resonant converter with power factor correction function and controller thereof |
| CN207304371U (en) * | 2017-08-16 | 2018-05-01 | 英飞特电子（杭州）股份有限公司 | A kind of controlled resonant converter |
-
2017
- 2017-08-16 CN CN201710703224.2A patent/CN107257194B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5559688A (en) * | 1993-05-19 | 1996-09-24 | 1,005,539 Ontario Inc. | Resonant power factor converter |
| US5598326A (en) * | 1994-02-10 | 1997-01-28 | Philips Electronics North America | High frequency AC/AC converter with PF correction |
| EP1164689A2 (en) * | 2000-06-16 | 2001-12-19 | FORFAS, (trading as PEI Technologies) | A single stage ac/dc converter |
| US6359395B1 (en) * | 2000-12-06 | 2002-03-19 | Fazle S. Quazi | Control circuit for power factor corrected electronic ballasts and power supplies |
| US20040136208A1 (en) * | 2002-10-21 | 2004-07-15 | Advanced Power Technology, Inc., A Delaware Corporation | Power converter method and apparatus having high input power factor and low harmonic distortion |
| US20110116290A1 (en) * | 2007-11-05 | 2011-05-19 | John Talbot Boys | Power control |
| CN106787675A (en) * | 2016-12-28 | 2017-05-31 | 成都芯源系统有限公司 | Resonant converter with power factor correction function and controller thereof |
| CN207304371U (en) * | 2017-08-16 | 2018-05-01 | 英飞特电子（杭州）股份有限公司 | A kind of controlled resonant converter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021249332A1 (en) * | 2020-06-12 | 2021-12-16 | 英飞特电子（杭州）股份有限公司 | Charge pump control circuit and driving power source |
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