CN105915081A - Topology structure and control method of step-down type AC-DC converter - Google Patents
Topology structure and control method of step-down type AC-DC converter Download PDFInfo
- Publication number
- CN105915081A CN105915081A CN201610153603.4A CN201610153603A CN105915081A CN 105915081 A CN105915081 A CN 105915081A CN 201610153603 A CN201610153603 A CN 201610153603A CN 105915081 A CN105915081 A CN 105915081A
- Authority
- CN
- China
- Prior art keywords
- diode
- input
- inductance
- switching tube
- outfan
- 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.)
- Pending
Links
Classifications
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/2176—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only comprising a passive stage to generate a rectified sinusoidal voltage and a controlled switching element in series between such stage and the output
-
- 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
-
- 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
- H02M1/4258—Arrangements for improving power factor of AC input using a single converter stage both for correction of AC input power factor and generation of a regulated and galvanically isolated DC output voltage
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention provides a topology structure and control method of a step-down type AC-DC converter. The topology structure comprises an input AC power source, a single-phase rectifier, an LC filter and a load, wherein the input AC power source is connected with the single-phase rectifier and the single-phase rectifier is connected with the LC filter. The topology structure is characterized in that an auxiliary corrector, a step-down type DC-DC converter and a controller are also arranged, wherein the LC filter is connected with the auxiliary corrector, the auxiliary corrector is connected with the step-down type DC-DC converter, the auxiliary rectifier is provided with a switch tube Q2, the step-down type DC-DC converter is provided with a switch tube Q1, a control pole of the switch tube Q1 is connected with a first driver of the controller, and a control pole of the switch tube Q2 is connected with a second driver on the controller. According to the invention, AC-DC voltage reduction transformation can be realized, a power factor correction (PFC) function of input currents is also realized, power consumption is reduced, the equipment transformation efficiency is improved, and the PFC effect of an input side is substantially improved.
Description
Technical field
The present invention relates to step-down circuit structure and the control method thereof of a kind of improvement, particularly relating to one, to be effectively improved equipment defeated
Enter power factor, suppress harmonic pollution, realize the topological structure of AC-DC decompression transformation.
Background technology
Often needing 220V alternating current power supply is transformed into certain low-voltage dc power supply in DC power supply device, traditional method is by this
Alternating current power supply is realized by DC-DC decompression transformation after diode rectification, filtering again.But this method can make direct current
The input power factor of power-supply device is the lowest, and electrical network causes harmonic pollution, thus runs counter to current era to electrical equipment
The requirement of High Power Factor, low harmony wave pollution etc..
Fig. 1 is a kind of topological structure of conventional buck AC-DC converter, and Fig. 2 is the input current waveform of this changer,
Fig. 3 is the frequency spectrum of Fig. 2 input current.As seen from Figure 2, this input current waveform has serious friendship more to lose near zero-crossing point
Very, its crest, trough are not sinusoidal envelope lines, but flat-top, flat line.According to the document, its input current waveform
Total harmonic current distortion (THD) be 7%, PFC (PFC) is 99.5%.Obviously, these indexs are the most not
The most preferable.There is the basic reason of drawbacks described above and be in conventional art, when line voltage (voltage of such as near zero-crossing point) is low
When the output voltage of DC source, the electric energy of net side, that is electric capacity C in Fig. 11On electric charge cannot be transferred to DC source
Outfan, i.e. C2Two ends.So electric capacity C1On have residual charge, this just destroys electric capacity C1By sinusoidal rule transmission
The usefulness of instantaneous power, cause and in input current, create 3,5, the odd harmonics such as 7 ..., thus have influence on input current
The quality of waveform.
Therefore, for the deficiencies in the prior art, design one and can be effectively improved equipment input power factor, suppression harmonic wave dirt
The topological structure contaminating, realizing AC-DC decompression transformation is meaningful technical task.
Summary of the invention
The present invention proposes voltage-dropping type AC-DC converter topology structure and the control method thereof of a kind of improvement, it is intended to improve conversion
Device input current waveform quality, reaches both to improve PFC value, reduces again THD, thus reduces the harmonic pollution to electrical network.
The above-mentioned purpose of the present invention will be achieved through the following technical solutions: the voltage-dropping type AC-DC changer of a kind of improvement
Topological structure, including input ac power, single-phase rectification bridge, LC wave filter and load, described single-phase rectification bridge includes first
Input, the second input, the first outfan and the second outfan, two outfans of described input ac power connect respectively
First input end and the second input to single-phase rectification bridge；Described LC wave filter includes inductance L1With electric capacity C1, it is additionally provided with
Auxiliary corrective device, buck DC-DC converter and controller, described auxiliary corrective device includes inductance L3With switching tube Q2,
Described buck DC-DC converter includes inductance L2, switching tube Q1, diode D5With electric capacity C2, described controller bag
Include input end signal, pi regulator, amplitude limiter, comparator, the first driver and the second driver, described input end signal
Being connected with the comprehensive input of pi regulator, the outfan of pi regulator is connected with the input of amplitude limiter, amplitude limiter
Outfan is connected with the positive input terminal of comparator, and the outfan of comparator and the first driver and the second driver are connected；Described list
First outfan of commutating phase bridge and the inductance L of LC wave filter1One end be connected, described inductance L1The other end and electric capacity
C1One end, inductance L3One end, diode D5Negative electrode, inductance L2One end be connected to node e；Inductance L2's
The other end and electric capacity C2One end, load R one end be connected to node f, the second outfan of single-phase rectification bridge and electric capacity
C1The other end, switching tube Q2Emitter stage, switching tube Q1Emitter stage be connected, switching tube Q2Colelctor electrode and inductance
L3The other end be connected, switching tube Q1Colelctor electrode and diode D5Anode, electric capacity C2The other end, load R
The other end be connected to node g, switching tube Q1Control pole be connected with the first driver, switching tube Q2Control pole with
Second driver is connected, and is arranged at inductance L1The arbitrarily outfan of the detecting element of one end is connected to the input letter of controller
Number and pi regulator between integrated signal input；Or, described switching tube Q1Emitter stage and inductance L2Away from load
That one end of R, diode D5Negative electrode connect, switching tube Q1Colelctor electrode and inductance L1Away from that of single-phase rectification bridge
End, inductance L3Away from switching tube Q2That one end, electric capacity C1Near inductance L1That one end be connected and node e；Or
Person, switching tube Q2Emitter stage and inductance L3That one end away from single-phase rectification bridge is connected, switching tube Q2Colelctor electrode with
Inductance L1That one end, electric capacity C away from single-phase rectification bridge1Near inductance L1That one end, inductance L2Away from load R that
One end, diode D5Negative electrode be connected to node e；Or, switching tube Q2Emitter stage and inductance L3Away from single-phase rectifier
That one end of bridge is connected, switching tube Q1Emitter stage and inductance L2Away from load that one end of R, diode D5Negative electrode
Connect, switching tube Q1With switching tube Q2Colelctor electrode be connected, and with inductance L1That one end, electric capacity away from single-phase rectification bridge
C1Near inductance L1That one end be connected to node e.
Further, the topological structure of above-mentioned a kind of voltage-dropping type AC-DC changer, wherein: described single-phase rectification bridge bag
Include diode D1, diode D2, diode D3With diode D4, described diode D1Anode and diode D3's
Negative electrode is connected to first input end, diode D2Anode and diode D4Negative electrode be connected to the second input, two
Pole pipe D1Negative electrode and diode D2Negative electrode be connected to the first outfan, diode D3Anode and diode D4's
Anode is connected to the second outfan.
Further, the topological structure of above-mentioned a kind of voltage-dropping type AC-DC changer, wherein: described inductance L1Appoint
Meaning side is provided with detecting element, and the outfan of detecting element is connected to the comprehensive input of the pi regulator of controller.
Yet further, the topological structure of above-mentioned a kind of voltage-dropping type AC-DC changer, wherein: described switching tube Q1With
Switching tube Q2Employing equivalent switch substitutes, and described equivalent switch includes switching tube, the first diode and the second diode, switch
The emitter stage of pipe and the anode of the first diode are connected, and the negative electrode of the first diode is connected with rear end, separately, and the emitter stage of switching tube
And between colelctor electrode, it being parallel with the second diode, the anode of the second diode is connected with emitter stage, the negative electrode of the second diode and collection
Electrode is connected.
Additionally, the invention also discloses the control method of a kind of voltage-dropping type AC-DC changer, use aforesaid voltage-dropping type
The topological structure of AC-DC changer, operates according to the following steps: first by input end signal iin=Uin/ r is as electric current
Reference value, negative half-cycle current, after taking absolute value, is become positive current by this reference value, and it adds direct current offset amount iDCAfter
Deduct inductance L again1The current signal of element output after testing, subsequently into the comprehensive input of pi regulator, pi regulator
Output enters the positive input terminal of comparator after amplitude limiter amplitude limit effect, and the negative input termination isoceles triangle of comparator CP carries
Ripple, the signal that both generate more afterwards generates the first spike train by the first driver, is used for driving switching tube Q1, described ratio
The signal output pulse that relatively device generates generates the second spike train also by the second driver, is used for driving switching tube Q2。
Substantive distinguishing features and significant technological progress that the present invention highlights are presented as: alternating-current voltage source UinTied by topology of the present invention
After structure conversion, not only can play AC-DC decompression transformation, and have the PFC function of input current, whole conversion process concurrently
In be all towards blood pressure lowering direction change, it is possible to reduce power attenuation, improve device transform efficiency.Changer the most of the present invention defeated
Entering current waveform sine degree high, total harmonic current distortion THD is little, and the PFC PFC effect of input side obtains significantly
Improve.
Accompanying drawing explanation
Fig. 1 conventional buck AC-DC converter；
The input current waveform of Fig. 2 conventional buck AC-DC converter；
The input current frequency spectrum of Fig. 3 conventional buck AC-DC converter；
The topological structure of the voltage-dropping type AC-DC converter of a kind of improvement of Fig. 4 present invention；
The control mode of Fig. 5 topological structure of the present invention；
The input current waveform i of Fig. 6 changer of the present invention；
The input current frequency spectrum of Fig. 7 changer of the present invention；
The first distressed structure of the topological structure of Fig. 8 present invention a kind of voltage-dropping type AC-DC converter；
The second distressed structure of the topological structure of Fig. 9 present invention a kind of voltage-dropping type AC-DC converter；
The third distressed structure of the topological structure of Figure 10 present invention a kind of voltage-dropping type AC-DC converter；
Figure 11 equivalent switch pipe schematic diagram.
In figure, the implication of each reference is: 1 input ac power Uin, 2 single-phase rectification bridges, 3 LC wave filter,
4 auxiliary corrective devices, 5 buck DC-DC converters, 6 loads, 7 controllers.
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is described in further detail, so that technical solution of the present invention is easier to reason
Solve and grasp.
The topological structure of the voltage-dropping type AC-DC changer of a kind of improvement of the present invention as shown in Figure 4, including input ac power
Uin1, single-phase rectification bridge 2, LC wave filter 3, auxiliary corrective device 4, buck DC-DC converter 5, load 6 and control
Device 7.The input side of described voltage-dropping type AC-DC changer is alternating current power supply Uin.The diode D of described single-phase rectification bridge 21
Anode and diode D3Negative electrode be connected to node a, diode D2Anode and diode D4Negative electrode be connected to
Node b, node a and node b are the input of single-phase rectification bridge 2, diode D1Negative electrode and diode D2Negative electrode
It is connected to node c, diode D3Anode and diode D4Anode be connected to node d, node c and node d i.e.
Outfan for single-phase rectification bridge 2.Described input ac power Uin2 inputs of 1 are coupled with single-phase rectification bridge 2
On node a and node b；LC wave filter includes inductance L1With electric capacity C1, auxiliary corrective device 4 includes inductance L3And switching tube
Q2, buck DC-DC converter 5 includes inductance L2, switching tube Q1, diode D5With electric capacity C2.Single-phase rectifier
The node c of the bridge 2 and inductance L of LC wave filter 31One end be connected, inductance L1The other end and electric capacity C1One end,
Inductance L3One end, diode D5Negative electrode, inductance L2One end be connected to node e；Inductance L2The other end with electricity
Hold C2One end, load R one end be connected to node f；The node d and electric capacity C of single-phase rectification bridge 21The other end,
Switching tube Q2Emitter stage, switching tube Q1Emitter stage be connected；Switching tube Q2Colelctor electrode and inductance L3Other end phase
It is connected to h point；Switching tube Q1Colelctor electrode and diode D5Anode, electric capacity C2The other end, load R the other end
It is connected to node g；Switching tube Q1Control pole be connected with the outfan of the driver 1 in controller 7；Switching tube Q2's
Control pole to be connected with the outfan of the driver 2 in controller 7.Inductance L1One end be serially connected with current measuring element CT, its
Output current signal is connected to the negative input end of controller, as the feedback signal of input current.Need exist for explanation be, although
In Fig. 4, detecting element CT is serially connected in inductance L1Connect node c one end, but actually used in, detecting element CT also may be used
It is serially connected in inductance L1That one end near node e.
The topological structure of voltage-dropping type AC-DC converter of the present invention also has three kinds of distressed structures, as shown in Figure 8, the first deformation
Structure is switching tube Q with the topological structure difference of the changer in Fig. 41Emitter stage and inductance L2Away from load R that
End, diode D5Negative electrode be connected to node g, switching tube Q1Colelctor electrode and inductance L1Away from that of single-phase rectification bridge 2
End, inductance L3Away from switching tube Q2That one end, electric capacity C1Near inductance L1That one end be connected and node e.Such as figure
Shown in 9, the second distressed structure is switching tube Q with the topological structure difference of the changer in Fig. 42Emitter stage and inductance
L3That one end away from single-phase rectification bridge 2 is connected to h point, switching tube Q2Colelctor electrode and inductance L1Away from single-phase rectifier
That one end of bridge 2, electric capacity C1Near inductance L1That one end, inductance L2Away from load that one end of R, diode D5's
Negative electrode is connected to node e.As shown in Figure 10, the third distressed structure exists with the topological structure difference of the changer in Fig. 4
In, switching tube Q2Emitter stage and inductance L3That one end away from single-phase rectification bridge 2 is connected to h point, switching tube Q1's
Emitter stage and inductance L2Away from load that one end of R, diode D5Negative electrode be connected to node g, switching tube Q1And switch
Pipe Q2Colelctor electrode be connected, and with inductance L1That one end, electric capacity C away from single-phase rectification bridge 21Near inductance L1That
End is connected to node e.Need exist for explanation, switching tube Q1With switching tube Q2Control the connected mode of pole and Fig. 4
In the topological structure of voltage-dropping type AC-DC converter identical, Fig. 8 does not shows that.
Additionally, the switching tube Q in this case1And Q2Can replace with the equivalent switch shown in Figure 11, equivalent switch includes out
Close the combination of pipe and diode, the emitter stage of switching tube and the anode of the first diode to be connected, the negative electrode of the first diode and rear end
It is connected, separately, between the emitter and collector of switching tube, is parallel with the second diode, the anode of the second diode and emitter stage phase
Even, the negative electrode of the second diode is connected with colelctor electrode.
The controller of the voltage-dropping type AC-DC changer of a kind of improvement and control method are as shown in Fig. 47.Its input
Signal iin=Uin/ r is current reference value, uses Uin/ r represents iinIt is to show iinWith line voltage UinComplete Synchronization, same phase,
By adjusting the size of r with required reference value i of adjustinginSize.Negative half-cycle current, after taking absolute value, is become by this reference value
Positive current, it adds direct current offset amount iDCAfter deduct CT output current signal mentioned above again, subsequently into PI adjust
The comprehensive input of joint device.The output of pi regulator enters the positive input terminal of comparator CP after amplitude limit, and comparator CP's is negative
Input termination isoceles triangle carrier wave, the signal that both generate more afterwards generates pulse Q by driver 11g(refering to Fig. 5),
For driving switching tube Q1.The output pulse of described comparator CP generates pulse Q also by driver 22g(refering to figure
5), it is used for driving switching tube Q2。
Fig. 5 is the main electrical characteristics schematic diagram of associated appliance part in Fig. 4.In figure, Q1g、Q2gIt is respectively switching tube Q1、Q2
Driving signal；VC1For electric capacity C1Terminal voltage；iL2、iL3It is respectively inductance L1、L3Electric current.
It is known that the switching frequency of low pressure high-performance direct current power supply internal power switching tube is general all at hundreds of about kHz, also
The most each switch periods only has several between ten several μ s.And that DC supply input is line voltage Uin, its cycle typically exists
About 20ms fluctuates.Obviously, on this period ratio line voltage cycle high thousand times, therefore in analyzing each switch periods
Q1、Q2、C1、L1、L2Dynamic characteristic time, it is believed that input current (i.e. iL1) it is constant.Particularly at electrical network
Time near voltage over zero, iL1The most small, it is gradually to zero, therefore Fig. 5 not represents.
It addition, as it has been described above, when line voltage is less than the output voltage of DC source, the electric energy of net side cannot pass through C1Pass
It is passed to the outfan of DC source, now, electric capacity C1On electric charge cannot be discharged into zero.Which limits voltage on line side to electricity
Hold C1Charging, thus directly influence input current and cannot approach the sinusoidal wave form of line voltage, it is impossible to normally realize
PFC。
The work process of changer is as follows: at t0Before moment, Q1、Q2All turning off, c, d end of rectifier bridge passes through inductance L1
To C1Charging, V in Fig. 5C1Linear increase.t0In the moment, make Q1Open-minded, then C1And L2Vibrate, C1Pass through L2To
C2, R electric discharge, iL2Increase rapidly during beginning, VC1To reduce rapidly.Work as VC1≤UOTime, iL2Decline rapidly.Work as iL2≤iL1
Time, C1Stop electric discharge, and in store residual charge.Therefore at Q1Close every time and have no progeny, net side UinEvery time cannot be from VC1=0 opens
Begin to C1Charging so that at the near zero-crossing point input current i of line voltageL1=0, form PFC blind area, thus form input
The intermodulation distortion of electric current.For preventing this situation from occurring, the present invention is at t1Moment makes Q2Open-minded, then C1、L3Vibrate, iL3
Increase rapidly, by voltage VC1It is pulled down to rapidly zero, even initially enters negative direction charging.Now, that is at t2Moment, will
Q1、Q2Simultaneously turn off, due to C1Voltage VC1Practically negligible, so Q1The voltage V born1CEFor-UO(switch tube and
Speech belongs to back bias voltage), and diode D5The voltage born is UO(diode is said and also belongs to back bias voltage), Q2Bear is zero electricity
Pressure.Hereafter, C1Again by c, d end of rectifier bridge through L1To C1Linear-charging again, Q1The voltage V born1CEBy-UOSlowly
Go up, when charging voltage VC1≥UOTime, V1CEGo back up to zero and continued to raise, hereafter along with VC1Continue to rise and rise,
Its value is VC1-UO.Around here, diode D5The voltage born is still for UO(genus back bias voltage), Q2The voltage born
V2CE=VC1.To next t0In the moment, this structure repeats again above-mentioned work process.
Fig. 6 is the simulation waveform of input current of the present invention, and Fig. 7 is the frequency spectrum of Fig. 6 waveform.It can be seen that Fig. 6 current waveform
Sine degree be substantially better than Fig. 2, this waveform near zero-crossing point can stationary linear transition, there is not intermodulation distortion.Waveform
Peak dot and valley point are flat lines as the roundest and the most smooth sinusoidal wave crest and trough rather than Fig. 2.As seen from Figure 7, defeated
Enter in current waveform in addition to first-harmonic, also contain 3,5, the odd harmonic such as 7 ..., but amplitude is the least, does not almost see.Figure
The document of 1 does not provide the concrete numerical value of its each harmonic wave, is only referred to 3 times, 5 subharmonic and higher hamonic wave the least, this
Saying is the most coarse.By the frequency spectrum of Fig. 3 it is recognised that at least its 3 wave amplitudes are close to first-harmonic, other harmonic amplitude
Also apparently higher than the harmonic amplitude of the present invention of Fig. 7.
Table 1 is the test value of each current component in Fig. 7 frequency spectrum of the present invention, this test value can obtain PFC >=0.9999；Separately
Outward, the fft analysis of simulation software also can immediately arrive at, the THD=4.496% of input current of the present invention.Obviously, both
All it is substantially better than PFC=0.995 and THD=7% of Fig. 1 document.
Certainly, being more than the representative instance of the present invention, in addition, the present invention can also have other multiple specific embodiment party
The technical scheme that formula, all employing equivalents or equivalent transformation are formed, within all falling within the scope of protection of present invention.
The test value of each current component in table 1 Fig. 7 frequency spectrum of the present invention
| i1 | i3 | i5 | i7 | i9 | i11 | i13 | i15 | 、、、 |
| 4.0200A | 0.035A | 0.0106A | 0.0115A | 0.007A | 0.0115A | 0.0065A | 0.0052A | 、、、 |
Claims (7)
1. a topological structure for voltage-dropping type AC-DC changer, including input ac power, single-phase rectification bridge, LC filters
Ripple device and load, described single-phase rectification bridge has first input end, the second input, the first outfan and the second outfan, institute
Two outfans stating input ac power are respectively connecting to first input end and second input of single-phase rectification bridge；Described LC
Wave filter includes inductance L1With electric capacity C1, described single-phase rectification bridge includes diode D1, diode D2, diode D3With
Diode D4, described diode D1Anode and diode D3Negative electrode be connected to the first input end of one-way commutation bridge,
Diode D2Anode and diode D4Negative electrode be connected to the second input of one-way commutation bridge, diode D1Negative electrode
With diode D2Negative electrode be connected to the first outfan, diode D3Anode and diode D4Anode be connected to
Two outfans, it is characterised in that: described topological structure is provided with auxiliary corrective device, buck DC-DC converter and controller,
Described auxiliary corrective device includes inductance L3With switching tube Q2, described buck DC-DC converter includes inductance L2, switching tube
Q1, diode D5With electric capacity C2, described controller include input end signal, pi regulator, amplitude limiter, comparator,
First driver and the second driver, described input end signal is connected with the comprehensive input of pi regulator, pi regulator defeated
Going out end to be connected with the input of amplitude limiter, the outfan of amplitude limiter is connected with the positive input terminal of comparator, the output of comparator
End is connected with the first driver and the second driver；First outfan of described single-phase rectification bridge and the inductance L of LC wave filter1's
One end is connected, described inductance L1The other end and electric capacity C1One end, inductance L3One end, diode D5Negative electrode,
Inductance L2One end be connected to node e, inductance L2The other end and electric capacity C2One end, one end of load is connected to
Node f, the second outfan of single-phase rectification bridge and electric capacity C1The other end, switching tube Q2Emitter stage, switching tube Q1Send out
Emitter-base bandgap grading is connected to node d, switching tube Q2Colelctor electrode and inductance L3The other end be connected, described switching tube Q1Collection
Electrode and diode D5Anode, electric capacity C2The other end, the other end of load be connected to node g；Described switching tube
Q1Control pole be connected with the first driver, switching tube Q2Control pole be connected with the second driver；Described inductance L1
Any side be provided with detecting element, the outfan of this detecting element is connected to the comprehensive input of the pi regulator of controller.
The topological structure of voltage-dropping type AC-DC changer the most according to claim 1, it is characterised in that: described switch
Pipe Q1Equivalent circuit include switching tube, the first diode and the second diode, the emitter stage of switching tube and the first diode
Anode is connected, and the negative electrode of the first diode is connected with rear end, separately, is parallel with the two or two between the emitter and collector of switching tube
Pole is managed, and the anode of the second diode is connected with emitter stage, and the negative electrode of the second diode is connected with colelctor electrode.
The topological structure of voltage-dropping type AC-DC changer the most according to claim 1, it is characterised in that: described switch
Pipe Q2Equivalent circuit include switching tube, the first diode and the second diode, the emitter stage of switching tube and the first diode
Anode is connected, and the negative electrode of the first diode is connected with rear end, separately, is parallel with the two or two between the emitter and collector of switching tube
Pole is managed, and the anode of the second diode is connected with emitter stage, and the negative electrode of the second diode is connected with colelctor electrode.
4. a topological structure for voltage-dropping type AC-DC changer, including input ac power, single-phase rectification bridge, LC filters
Ripple device and load, described single-phase rectification bridge has first input end, the second input, the first outfan and the second outfan, institute
Two outfans stating input ac power are respectively connecting to first input end and second input of single-phase rectification bridge；Described LC
Wave filter includes inductance L1With electric capacity C1, described single-phase rectification bridge includes diode D1, diode D2, diode D3With
Diode D4, described diode D1Anode and diode D3Negative electrode be connected to the first input end of one-way commutation bridge,
Diode D2Anode and diode D4Negative electrode be connected to the second input of one-way commutation bridge, diode D1Negative electrode
With diode D2Negative electrode be connected to the first outfan, diode D3Anode and diode D4Anode be connected to
Two outfans, it is characterised in that: described topological structure is provided with auxiliary corrective device, buck DC-DC converter and controller,
Described auxiliary corrective device includes inductance L3With switching tube Q2, described buck DC-DC converter includes inductance L2, switching tube
Q1, diode D5With electric capacity C2, described controller include input end signal, pi regulator, amplitude limiter, comparator,
First driver and the second driver, described input end signal is connected with the comprehensive input of pi regulator, pi regulator defeated
Going out end to be connected with the input of amplitude limiter, the outfan of amplitude limiter is connected with the positive input terminal of comparator, the output of comparator
End is connected with the first driver and the second driver；First outfan of described single-phase rectification bridge and the inductance L of LC wave filter1's
One end is connected, described inductance L1The other end and electric capacity C1One end, inductance L3One end, switching tube Q1Colelctor electrode
It is connected to node e, described switching tube Q1Emitter stage and diode D5Negative electrode, inductance L2One end be connected to joint
Point g, described inductance L2The other end and electric capacity C2One end, one end of load be connected to node f, described single-phase rectifier
Second outfan of bridge and electric capacity C1The other end, switching tube Q2Emitter stage, diode D5Anode, electric capacity C2Another
One end, the other end of load are connected to node d, described switching tube Q2Colelctor electrode and inductance L3The other end be connected；Institute
State switching tube Q1Control pole be connected with the first driver, described switching tube Q2Control pole be connected with the second driver；
Described inductance L1Any side be provided with detecting element, the outfan of this detecting element be connected to the pi regulator of controller combine
Close input.
5. a topological structure for voltage-dropping type AC-DC changer, including input ac power, single-phase rectification bridge, LC filters
Ripple device and load, described single-phase rectification bridge has first input end, the second input, the first outfan and the second outfan, institute
Two outfans stating input ac power are respectively connecting to first input end and second input of single-phase rectification bridge；Described LC
Wave filter includes inductance L1With electric capacity C1, described single-phase rectification bridge includes diode D1, diode D2, diode D3With
Diode D4, described diode D1Anode and diode D3Negative electrode be connected to the first input end of one-way commutation bridge,
Diode D2Anode and diode D4Negative electrode be connected to the second input of one-way commutation bridge, diode D1Negative electrode
With diode D2Negative electrode be connected to the first outfan, diode D3Anode and diode D4Anode be connected to
Two outfans, it is characterised in that: described topological structure is provided with auxiliary corrective device, buck DC-DC converter and controller,
Described auxiliary corrective device includes inductance L3With switching tube Q2, described buck DC-DC converter includes inductance L2, switching tube
Q1, diode D5With electric capacity C2, described controller include input end signal, pi regulator, amplitude limiter, comparator,
First driver and the second driver, described input end signal is connected with the comprehensive input of pi regulator, pi regulator defeated
Going out end to be connected with the input of amplitude limiter, the outfan of amplitude limiter is connected with the positive input terminal of comparator, the output of comparator
End is connected with the first driver and the second driver；First outfan of described single-phase rectification bridge and the inductance L of LC wave filter1's
One end is connected, described inductance L1The other end and electric capacity C1One end, switching tube Q2Colelctor electrode, diode D5The moon
Pole, inductance L2One end be connected to node e, described inductance L2The other end and electric capacity C2, load one end be connected
In node f, the second outfan of described single-phase rectification bridge and electric capacity C1The other end, inductance L3One end, switching tube Q1's
Emitter stage is connected to node d, described inductance L3The other end and switching tube Q2Emitter stage be connected, described switching tube
Q1Colelctor electrode and diode D5Anode, electric capacity C2The other end, the other end of load is connected；Described switching tube Q1
Control pole be connected with the first driver, switching tube Q2Control pole be connected with the second driver；Described inductance L1Appoint
Meaning side is provided with detecting element, and the outfan of this detecting element is connected to the comprehensive input of the pi regulator of controller.
6. a topological structure for voltage-dropping type AC-DC changer, including input ac power, single-phase rectification bridge, LC filters
Ripple device and load, described single-phase rectification bridge has first input end, the second input, the first outfan and the second outfan, institute
Two outfans stating input ac power are respectively connecting to first input end and second input of single-phase rectification bridge；Described LC
Wave filter includes inductance L1With electric capacity C1, described single-phase rectification bridge includes diode D1, diode D2, diode D3With
Diode D4, described diode D1Anode and diode D3Negative electrode be connected to the first input end of one-way commutation bridge,
Diode D2Anode and diode D4Negative electrode be connected to the second input of one-way commutation bridge, diode D1Negative electrode
With diode D2Negative electrode be connected to the first outfan, diode D3Anode and diode D4Anode be connected to
Two outfans, it is characterised in that: described topological structure is provided with auxiliary corrective device, buck DC-DC converter and controller,
Described auxiliary corrective device includes inductance L3With switching tube Q2, described buck DC-DC converter includes inductance L2, switching tube
Q1, diode D5With electric capacity C2, described controller include input end signal, pi regulator, amplitude limiter, comparator,
First driver and the second driver, described input end signal is connected with the comprehensive input of pi regulator, pi regulator defeated
Going out end to be connected with the input of amplitude limiter, the outfan of amplitude limiter is connected with the positive input terminal of comparator, the output of comparator
End is connected with the first driver and the second driver；First outfan of described single-phase rectification bridge and the inductance L of LC wave filter1's
One end is connected, described inductance L1The other end and electric capacity C1One end, switching tube Q2Colelctor electrode, switching tube Q1Collection
Electrode is connected to node e, described switching tube Q1Emitter stage and diode D5Negative electrode, inductance L2One end be connected
In node g, described inductance L2The other end and electric capacity C2, load one end be connected to node f, described single-phase rectification bridge
The second outfan and electric capacity C1The other end, inductance L3One end, diode D5Anode, electric capacity C2The other end,
The other end of load is connected to node d, inductance L3The other end and switching tube Q2Emitter stage be connected；Described switching tube
Q1Control pole be connected with the first driver, described switching tube Q2Control pole be connected with the second driver；Described inductance
L1Any side be provided with detecting element, the outfan of detecting element is connected to the comprehensive input of the pi regulator of controller.
7. the control method of voltage-dropping type AC-DC changer, it is characterised in that: described voltage-dropping type AC-DC changer
Including input ac power, single-phase rectification bridge, LC wave filter auxiliary corrective device, buck DC-DC converter, controller and
Load, described controller includes that input end signal, pi regulator, amplitude limiter, comparator, the first driver and second drive
Device, operates according to the following steps: first by input end signal iin=Uin/ r is as current reference value, and this reference value is through taking absolutely
After value, negative half-cycle current being become positive current, it adds direct current offset amount iDCAfter deduct inductance L again1Element after testing
The current signal of output, subsequently into pi regulator, the output of pi regulator enters comparator after amplitude limiter amplitude limit effect
Positive input terminal, comparator CP negative input termination isoceles triangle carrier wave, the signal that both generate more afterwards by first driving
Device generates the first pulse, is used for driving switching tube Q1, the output pulse of described comparator generates second also by the second driver
Pulse, is used for driving switching tube Q2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610153603.4A CN105915081A (en) | 2016-03-17 | 2016-03-17 | Topology structure and control method of step-down type AC-DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610153603.4A CN105915081A (en) | 2016-03-17 | 2016-03-17 | Topology structure and control method of step-down type AC-DC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105915081A true CN105915081A (en) | 2016-08-31 |
Family
ID=56744522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610153603.4A Pending CN105915081A (en) | 2016-03-17 | 2016-03-17 | Topology structure and control method of step-down type AC-DC converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105915081A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980912A (en) * | 2019-04-22 | 2019-07-05 | 浙江雷培德科技有限公司 | A kind of easy soft starting circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1710792A (en) * | 2005-07-05 | 2005-12-21 | 北京航空航天大学 | Pressure-reduced type high-power DC/DC converter flexible converter circuit for fuel-cell passenger coach |
| CN103124466A (en) * | 2011-11-18 | 2013-05-29 | 松下电器产业株式会社 | Lighting device and illumination apparatus |
| CN104735871A (en) * | 2015-03-16 | 2015-06-24 | 句容市万福达工艺品厂 | Non-isolated type LED driver |
| CN204559387U (en) * | 2015-04-30 | 2015-08-12 | 福州大学 | A kind of Buck code converter improving power factor |
-
2016
- 2016-03-17 CN CN201610153603.4A patent/CN105915081A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1710792A (en) * | 2005-07-05 | 2005-12-21 | 北京航空航天大学 | Pressure-reduced type high-power DC/DC converter flexible converter circuit for fuel-cell passenger coach |
| CN103124466A (en) * | 2011-11-18 | 2013-05-29 | 松下电器产业株式会社 | Lighting device and illumination apparatus |
| CN104735871A (en) * | 2015-03-16 | 2015-06-24 | 句容市万福达工艺品厂 | Non-isolated type LED driver |
| CN204559387U (en) * | 2015-04-30 | 2015-08-12 | 福州大学 | A kind of Buck code converter improving power factor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980912A (en) * | 2019-04-22 | 2019-07-05 | 浙江雷培德科技有限公司 | A kind of easy soft starting circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI381619B (en) | Single-phase and three-phase dual buck-boost/buck power factor correction circuits and controlling method thereof | |
| CN102801329B (en) | High-efficiency and low-loss AC/DC (Alternating Current/Direct Current) power supply circuit and control method thereof | |
| CN1428924A (en) | Switch power supply device | |
| CN107204717B (en) | Bridgeless boost CUK PFC circuit | |
| CN102291014A (en) | Alternating-current chopping-full-bridge rectification AC-DC (alternating current-to-direct current) converter | |
| CN103683919A (en) | High-power-factor low-harmonic-distortion constant current circuit and device | |
| CN102291019A (en) | Full-bridge rectification-direct-current push-pull inversion AC-DC (alternating current-to-direct current) converter | |
| CN110677059B (en) | Three-phase single-stage rectification circuit and control method thereof | |
| CN113489308B (en) | Step-down power factor correction converter without input current dead zone and control method | |
| Khan et al. | Input switched high performance three phase Buck-Boost controlled rectifier | |
| CN105958855A (en) | New-type high-gain quasi-Z-source inverter | |
| CN103762839B (en) | A kind of magnetic coupling type single-phase high-gain Bridgeless power factor circuit correcting circuit | |
| CN103956903B (en) | LC parallel resonances are depressured the control method of DC/DC conversion device | |
| CN203636178U (en) | Inverter welder | |
| CN104967304B (en) | One kind is based on no bridge CUK isolated form Three Phase Power Factor Correction Converters | |
| CN105915081A (en) | Topology structure and control method of step-down type AC-DC converter | |
| CN103595240A (en) | Device and method for reducing boosting amplitude of Boost type PFC converter | |
| CN113726147B (en) | Input-parallel output series bridgeless buck PFC converter | |
| CN113765359B (en) | Multi-unit parallel integrated buck bridgeless PFC converter | |
| CN104702092B (en) | The circuit of power factor correction of power supply changeover device | |
| CN110336458B (en) | Harmonic suppression circuit, power supply with same and air conditioner | |
| CN203590035U (en) | High-power factor low-harmonic distortion constant current circuit and device | |
| Nagaraj et al. | Performance enhancement of DC/DC converters for solar powered EV | |
| CN111555604A (en) | Novel quasi-single-stage high power factor circuit | |
| CN204835962U (en) | Voltage doubler rectifier circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20191206 |