CN208424230U - A kind of Switching Power Supply based on phaselocked loop - Google Patents
A kind of Switching Power Supply based on phaselocked loop Download PDFInfo
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- CN208424230U CN208424230U CN201820897147.9U CN201820897147U CN208424230U CN 208424230 U CN208424230 U CN 208424230U CN 201820897147 U CN201820897147 U CN 201820897147U CN 208424230 U CN208424230 U CN 208424230U
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- capacitor
- side winding
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- pulse transformer
- switch
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Abstract
The utility model discloses a kind of Switching Power Supply based on phaselocked loop, the utility model includes AC power source (Vin), first capacitor (C1), the second capacitor (C2), third capacitor (C3), the 4th capacitor (C4), first switch tube (Q1), second switch (Q2), pulse transformer (PT), first diode (D1), the second diode (D2), the first inductance (L1), the second inductance (L2), phaselocked loop (PLL), phase shifter, pressure regulator；The phaselocked loop (PLL) is made of phase discriminator, loop filter, voltage controlled oscillator and frequency divider.The utility model advantage is that output voltage can reduce the influence of frequency fluctuation, keeps stablizing in a big way, and the design before simplifying can satisfy more harsh environmental demand.
Description
Technical field
The utility model relates to field of power electronics, more specifically to a kind of Switching Power Supply based on phaselocked loop.
Background technique
The development of present information electronic technology, the requirement for power supply are higher and higher.Traditional switch power supply is based primarily upon PWM
Control technology, but with desired continuous improvement, influence of the fluctuation of supply frequency for output voltage is increasingly significant.Before
Measure mainly use AC-DC-AC-DC technology, the influence of frequency fluctuation could be effectively excluded using multiple commutation inversion.
Therefore, it is necessary to simplify to original model.Based on typical half bridge circuit, and combine theory of PLL
Feedback loop is set, output voltage is quickly adjusted according to supply frequency and keeps stable；And by diode
Two output end differential concatenations so that common-mode signal reduce to greatest extent output voltage fluctuation.
Utility model content
The technical problem to be solved by the present invention is to, for the prior art supply frequency have to output voltage it is larger
It influences, a kind of Switching Power Supply based on phaselocked loop is provided.
It is a kind of Switching Power Supply based on phaselocked loop that the utility model, which solves technical solution used by its technical problem,
It is characterised in that it includes AC power source (Vin), first capacitor (C1), the second capacitor (C2), third capacitor (C3), the 4th capacitor
(C4), first switch tube (Q1), second switch (Q2), pulse transformer (PT), first diode (D1), the second diode
(D2), the first inductance (L1), the second inductance (L2), phaselocked loop (PLL), phase shifter, pressure regulator；The phaselocked loop (PLL) is by reflecting
Phase device, loop filter, voltage controlled oscillator and frequency divider are constituted；
The source electrode of the first switch tube (Q1) is connect with the drain electrode of the second switch (Q2), the first switch tube
(Q1) sources connected in parallel of drain electrode and the second switch (Q2) is connected to the AC power source (Vin), the first switch
The source electrode of pipe (Q1) is connect with source side winding (N1) Same Name of Ends of the pulse transformer (PT), the second switch (Q2)
Drain electrode is connect with source side winding (N1) Same Name of Ends of the pulse transformer (PT)；The first capacitor (C1) and the second capacitor
(C2) it is connected in series and is connected in parallel in the AC power source (Vin), the first capacitor (C1) is connected with the second capacitor (C2)
Tie point connect with source side winding (N1) the different name end of the pulse transformer (PT)；The first of the pulse transformer (PT)
The Same Name of Ends of vice-side winding (N2) is connect with the anode of the first diode (D1), the cathode of the first diode (D1),
First inductance (L1), the third capacitor (C3), the pulse transformer (PT) the first vice-side winding (N2) different name
End is sequentially connected in series；The different name end of the second vice-side winding (N3) of the pulse transformer (PT) and second diode
(D2) anode connection, the cathode of second diode (D2), second inductance (L2), the 4th capacitor (C4), institute
The Same Name of Ends for stating the second vice-side winding (N3) of pulse transformer (PT) is sequentially connected in series；The of the pulse transformer (PT)
The different name end of one vice-side winding (N2) is connect with the tie point of second inductance (L2) and the 4th capacitor (C4)；The lock
The second interface (P2) of phase ring (PLL), the pressure regulator, first inductance (L1) and the third capacitor (C3) tie point
It is sequentially connected in series；The first interface (P1) of the phaselocked loop (PLL), the phase shifter, the first switch tube (Q1) grid
Pole is sequentially connected in series；The first interface (P1) of the phaselocked loop (PLL) is connect with the grid of the second switch (Q2)；Institute
The third interface (P3) for stating phaselocked loop (PLL) is connect with the source electrode of the second switch (Q2)；The phase discriminator, loop filter
Wave device, voltage controlled oscillator are sequentially connected in series；The voltage controlled oscillator is connect with the frequency divider；The frequency divider and the mirror
The connection of phase device.
Preferably, the first switch tube (Q1) is IGBT power switch tube or IGCT power switch tube, described the
Two switching tubes (Q2) are IGBT power switch tube or IGCT power switch tube；The pulse transformer (PT) is by primary side winding
(N1), the first vice-side winding (N2) and the second vice-side winding (N3) are constituted, the secondary side of the first of the pulse transformer (PT) around
Group (N2) and the second vice-side winding (N3) equal turn numbers；The phase shifter is phase inverter；The of the pulse transformer (PT)
The output voltage differential concatenation of one vice-side winding (N2) and the second vice-side winding (N3) constitutes common-mode voltage output, and feeds back
To among phaselocked loop (PLL)；The first capacitor (C1), the second capacitor (C2), first switch tube (Q1), second switch
(Q2) switching circuit formed carries out impulse modulation for the AC power source (Vin) input signal, through pulse transformer (PT)
It is output to the first vice-side winding (N2) and the second vice-side winding (N3) obtains pulsating direct current signal, pulsating direct current signal passes through institute
State the LC filter of the first inductance (L1) and the first capacitor (C1) composition, second inductance (L2) and described second holds
(C2) the LC filter process formed is smooth DC signal output voltage, then the first vice-side winding (N2) and second is secondary
The output of side winding (N3) is reversely connected in series to form common mode output and inhibits voltage fluctuation；Smooth direct current signal is made through the pressure regulator
With the variation with AC power source (Vin) input signal described in the voltage controlled oscillator traceback, the voltage controlled oscillator can change
Become output frequency, is compared by the frequency divider with the frequency of the AC power source (Vin) input signal, passes through negative-feedback
Switching frequency is finely adjusted, keeps stablizing so as to adjust output voltage.
Compared with prior art, the utility model advantage is the differential concatenation that output stage uses two diodes, common mode letter
Number inhibit voltage fluctuation；And the frequency adjusting based on phaselocked loop allows output voltage to keep stable in a big way, letter
Design before change can satisfy harsh environment demand；Using being likely to occur between pulse transformer isolation input and output
Impact, ensure equipment safety.
Detailed description of the invention
Fig. 1: the block diagram of the utility model；
Fig. 2: the utility model phase-locked loop circuit block diagram；
Fig. 3: output voltage waveforms.
Specific embodiment
The utility model is understood and implemented for the ease of those of ordinary skill in the art, it is right with reference to the accompanying drawings and embodiments
The utility model is described in further detail, it should be understood that implementation example described herein is only used for describing and explaining this
Utility model is not used to limit the utility model.
As shown in Figure 1, being the utility model circuit configuration block diagram.Technical solution used by the utility model embodiment
For a kind of Switching Power Supply based on phaselocked loop, which is characterized in that including AC power source (Vin), first capacitor (C1), the second capacitor
(C2), third capacitor (C3), the 4th capacitor (C4), first switch tube (Q1), second switch (Q2), pulse transformer (PT),
One diode (D1), the second diode (D2), the first inductance (L1), the second inductance (L2), phaselocked loop (PLL), phase shifter, pressure regulation
Device；The phaselocked loop (PLL) is made of phase discriminator, loop filter, voltage controlled oscillator and frequency divider；
First switch tube (the Q1) source electrode and the second switch (Q2) drain electrode connection, the first switch tube
(Q1) drain electrode and the second switch (Q2) sources connected in parallel be connected to the AC power source (Vin), the first switch tube
(Q1) source electrode and the pulse transformer (PT) source side winding (N1) Same Name of Ends connection, the second switch (Q2) leakage
The source side winding (N of pole and the pulse transformer (PT)1) Same Name of Ends connection；First capacitor (the C1) and the second capacitor (C2)
It is connected in series and is connected in parallel in the AC power source (Vin), the first capacitor (C1) and the second capacitor (C2) concatenated connection
The source side winding (N of point and the pulse transformer (PT)1) connection of different name end；The secondary side of the first of the pulse transformer (PT) around
Group (N2) Same Name of Ends and the first diode (D1) anode connection, the first diode (D1) cathode, described first
Inductance (L1), the third capacitor (C3), the first vice-side winding (N of the pulse transformer (PT)2) different name end be sequentially connected in series
Connection；Second vice-side winding (N of the pulse transformer (PT)3) different name end and the second diode (D2) anode connect
It connects, the second diode (D2) cathode, the second inductance (L2), the 4th capacitor (C4), the pulse transformer
(PT) the second vice-side winding (N3) Same Name of Ends be sequentially connected in series；First vice-side winding of the pulse transformer (PT)
(N2) different name end and the second inductance (L2) and the 4th capacitor (C4) tie point connection；The phaselocked loop (PLL)
Second interface (P2), the pressure regulator, the first inductance (L1) and the third capacitor (C3) tie point be sequentially connected in series company
It connects；First interface (the P of the phaselocked loop (PLL)1), the phase shifter, the first switch tube (Q1) grid be sequentially connected in series company
It connects；First interface (the P of the phaselocked loop (PLL)1) and the second switch (Q2) grid connection；The phaselocked loop (PLL)
Third interface (P3) and the second switch (Q2) source electrode connection；The phase discriminator, loop filter, voltage controlled oscillation
Device is sequentially connected in series；The voltage controlled oscillator is connect with the frequency divider；The frequency divider is connect with the phase discriminator.
The embodiments of the present invention is introduced below with reference to Fig. 1 to Fig. 3.First switch tube (the Q1) and described
Two switching tube (Q2) be same model IGBT power switch tube；The phase shifter selects the chip conduct of model 74LS04
Phase inverter；The pressure regulator selects the chip of model LM117K as pressure regulator；The pulse transformer (PT) is by primary side
Winding (N1), the first vice-side winding (N2) and the second vice-side winding (N3) constitute, the secondary side of the first of the pulse transformer (PT)
Winding (N2) and the second vice-side winding (N3) equal turn numbers.
The embodiments of the present invention specific workflow is as follows:
Firstly, AC power source (the Vin) pass through the first capacitor (C1) and the second capacitor (C2) after filtering
AC signal is obtained, into the first switch tube (Q1) and the second switch (Q2), in the positive half period of AC signal
It is interior, the first switch tube (Q1) and the second switch (Q2) be connected in turn, pulsating direct current signal is formed, is flowed through described
Primary side winding (the N of pulse transformer (PT)1) current direction from top to bottom, in the first vice-side winding (N2) and the second secondary side
Winding (N3) it is respectively induced out the pulsating direct current signal of voltage direction from top to down；
In the first switch tube (Q1) conducting, the second switch (Q2) shutdown when, the second vice-side winding (N3)
Two diode (D2) with voltage direction on the contrary, therefore reversed isolation circuitry cannot be connected, so when there was only the first vice-side winding (N2)
Conducting, by the first inductance (L1) and the first capacitor (C1) composition LC filter, the second inductance (L2) and institute
State the second appearance (C2) composition LC filter flat wave after, formed direct current output, the third capacitor (C3) output voltage have
Subtle rising, and the 4th capacitor (C4) output voltage have subtle decline；
In the first switch tube (Q1) shutdown, the second switch (Q2) conducting when, flow through the pulse transformer
(PT) primary side winding (N1) current direction from the bottom up, in the first vice-side winding (N2) and the second vice-side winding (N3) point
The pulsating direct current signal of voltage direction from bottom to top, but the first vice-side winding (N are not induced2) first diode (D1) and electricity
Press contrary, therefore reversed isolation circuitry cannot be connected, so when there was only the second vice-side winding (N3) conducting, by described the
One inductance (L1) and the first capacitor (C1) composition LC filter, the second inductance (L2) and the second appearance (C2) group
At LC filter flat wave after, form direct current output, at this time the 4th capacitor (C4) output voltage have it is subtle upper
It rises, and the third capacitor (C3) output voltage have subtle decline；
In the negative half-cycle of AC signal, the third capacitor (C3) output voltage and the 4th capacitor (C4)
Output voltage also have subtle fluctuation, can be by the third capacitor (C by differential concatenation3) output voltage and described
4th capacitor (C4) the rise and fall of output voltage offset, keep voltage stabilization；
Output voltage passes through the pressure regulator pressure regulation voltage, and feedback arrives the voltage controlled oscillator of the phaselocked loop (PLL)
In compared with the frequency of input voltage, when the two is equal, the signal for generating specific frequency controls the first switch tube
(Q1) shutdown, the second switch (Q2) conducting and shutdown；And work as the AC power source (Vin) frequency is when have fluctuation,
Output voltage can be impacted, the frequency variation of voltage controlled oscillator traceback input at this time correspondingly increases or reduces switch
Frequency makes output voltage return to original level by negative feedback.
Although it is a kind of switch electricity based on phaselocked loop that this specification, which has more used the technical solution of the utility model,
Source, it is characterised in that: including AC power source (Vin), first capacitor (C1), the second capacitor (C2), third capacitor (C3), the 4th capacitor
(C4), first switch tube (Q1), second switch (Q2), pulse transformer (PT), first diode (D1), the second diode
(D2), the first inductance (L1), the second inductance (L2), phaselocked loop (PLL), phase shifter, pressure regulator, phase discriminator, loop filter, pressure
A possibility that controlling the terms such as oscillator and frequency divider composition, but being not precluded using other terms.Only using these terms
It is the essence in order to more easily describe the utility model, it is practical with this for being construed as any additional limitation all
What novel spirit was disagreed.
It should be understood that the part that this specification does not elaborate belongs to the prior art.
It should be understood that the above-mentioned description for preferred embodiment is more detailed, can not therefore be considered to this
The limitation of utility model patent protection scope, those skilled in the art are not departing under the enlightenment of the utility model
Under ambit protected by the claims of this utility model, replacement or deformation can also be made, the utility model is each fallen within
Within protection scope, the utility model is claimed range and should be determined by the appended claims.
Claims (2)
1. a kind of Switching Power Supply based on phaselocked loop, which is characterized in that including AC power source (Vin), first capacitor (C1), second
Capacitor (C2), third capacitor (C3), the 4th capacitor (C4), first switch tube (Q1), second switch (Q2), pulse transformer
(PT), first diode (D1), the second diode (D2), the first inductance (L1), the second inductance (L2), phaselocked loop (PLL), phase shift
Device, pressure regulator；The phaselocked loop (PLL) is made of phase discriminator, loop filter, voltage controlled oscillator and frequency divider；
First switch tube (the Q1) source electrode and the second switch (Q2) drain electrode connection, the first switch tube (Q1)
Drain electrode and the second switch (Q2) sources connected in parallel be connected to the AC power source (Vin), the first switch tube (Q1)
Source electrode and the pulse transformer (PT) source side winding (N1) Same Name of Ends connection, the second switch (Q2) drain electrode with
The source side winding (N of the pulse transformer (PT)1) Same Name of Ends connection；First capacitor (the C1) and the second capacitor (C2) series connection
It connects and is connected in parallel in the AC power source (Vin), the first capacitor (C1) and the second capacitor (C2) concatenated tie point with
The source side winding (N of the pulse transformer (PT)1) connection of different name end；First vice-side winding of the pulse transformer (PT)
(N2) Same Name of Ends and the first diode (D1) anode connection, the first diode (D1) cathode, it is described first electricity
Feel (L1), the third capacitor (C3), the first vice-side winding (N of the pulse transformer (PT)2) different name end be sequentially connected in series company
It connects；Second vice-side winding (N of the pulse transformer (PT)3) different name end and the second diode (D2) anode connection,
Second diode (the D2) cathode, the second inductance (L2), the 4th capacitor (C4), the pulse transformer (PT)
The second vice-side winding (N3) Same Name of Ends be sequentially connected in series；First vice-side winding (N of the pulse transformer (PT)2)
Different name end and the second inductance (L2) and the 4th capacitor (C4) tie point connection；The second of the phaselocked loop (PLL) connects
Mouth (P2), the pressure regulator, the first inductance (L1) and the third capacitor (C3) tie point be sequentially connected in series；It is described
First interface (the P of phaselocked loop (PLL)1), the phase shifter, the first switch tube (Q1) grid be sequentially connected in series；It is described
First interface (the P of phaselocked loop (PLL)1) and the second switch (Q2) grid connection；The third of the phaselocked loop (PLL)
Interface (P3) and the second switch (Q2) source electrode connection；The phase discriminator, loop filter, voltage controlled oscillator are successively
It is connected in series；The voltage controlled oscillator is connect with the frequency divider；The frequency divider is connect with the phase discriminator.
2. the Switching Power Supply according to claim 1 based on phaselocked loop, it is characterised in that: the first switch tube (Q1) be
IGBT power switch tube or IGCT power switch tube, the second switch (Q2) it is IGBT power switch tube or IGCT function
Rate switching tube；The pulse transformer (PT) is by primary side winding (N1), the first vice-side winding (N2) and the second vice-side winding
(N3) constitute, the first vice-side winding (N of the pulse transformer (PT)2) and the second vice-side winding (N3) equal turn numbers；It is described
Phase shifter is phase inverter；First vice-side winding (N of the pulse transformer (PT)2) and the second vice-side winding (N3) output
Voltage reversal series connection constitutes common-mode voltage output, and feeds back among phaselocked loop (PLL)；First capacitor (the C1), second
Capacitor (C2), first switch tube (Q1), second switch (Q2) composition switching circuit for the AC power source (Vin) input letter
Number carry out impulse modulation, be output to the first vice-side winding (N through pulse transformer (PT)2) and the second vice-side winding (N3) obtain
Pulsating direct current signal, pulsating direct current signal pass through the first inductance (L1) and the first capacitor (C1) composition LC filter,
Second inductance (the L2) and the second capacitor (C2) composition LC filter process be smooth DC signal output voltage,
Again by the first vice-side winding (N2) and the second vice-side winding (N3) output be reversely connected in series to form common mode output inhibit voltage wave
It is dynamic；Smooth direct current signal is through pressure regulator effect and AC power source (V described in the voltage controlled oscillator tracebackin) input
The variation of signal, the voltage controlled oscillator can change output frequency, by the frequency divider and the AC power source (Vin) input
The frequency of signal is compared, and switching frequency is finely adjusted by negative-feedback, keeps stablizing so as to adjust output voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820897147.9U CN208424230U (en) | 2018-06-11 | 2018-06-11 | A kind of Switching Power Supply based on phaselocked loop |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820897147.9U CN208424230U (en) | 2018-06-11 | 2018-06-11 | A kind of Switching Power Supply based on phaselocked loop |
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| CN208424230U true CN208424230U (en) | 2019-01-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401440A (en) * | 2019-08-26 | 2019-11-01 | 范瑞兆 | A kind of piezoelectric ceramic transformer based on phaselocked loop |
-
2018
- 2018-06-11 CN CN201820897147.9U patent/CN208424230U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401440A (en) * | 2019-08-26 | 2019-11-01 | 范瑞兆 | A kind of piezoelectric ceramic transformer based on phaselocked loop |
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Granted publication date: 20190122 Termination date: 20200611 |