CN103683944B - Voltage supply system and current transformer therein and voltage adjusting method - Google Patents
Voltage supply system and current transformer therein and voltage adjusting method Download PDFInfo
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- CN103683944B CN103683944B CN201210357145.8A CN201210357145A CN103683944B CN 103683944 B CN103683944 B CN 103683944B CN 201210357145 A CN201210357145 A CN 201210357145A CN 103683944 B CN103683944 B CN 103683944B
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- 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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Abstract
The invention discloses a kind of voltage supply system and current transformer therein and voltage adjusting method.Current transformer comprises power model, feedback module and control module.Control module compares duty cycle reference value and dutycycle numerical value, variable reference voltage is correspondingly produced according to result of the comparison, and in order to compare variable reference voltage and feedback voltage, and adjust dutycycle numerical value according to variable reference voltage with feedback voltage result of the comparison.
Description
Technical field
The invention relates to a kind of voltage supply system, and in particular in a kind of voltage supply system
Current transformer.
Background technology
Embedded power supply generally uses multi-layer thick copper printed circuit board (PCB) (PCB) and Surface Mount power device etc. special
Processing procedure, reduces volume whereby, improves reliability, and it is at wireless network, optical network unit, server
All it is widely used with fields such as data storages.
It is said that in general, when traditional full adjustment type current transformer (Converter) is applied at embedded-type electric source domain
Time, its efficiency is the most restricted and cannot effectively promote.For example, in full adjustment type current transformer, electricity
The output voltage of source module is to compare with fixed reference potential through feedback, and control module is according to comparative result
Adjust and drive signal, and adjust the output voltage of power module whereby.Therefore, the size of output voltage is main
Determined by the comparative result of fixed reference potential with feedback voltage.Secondly, for making the power module all can foundation
Input voltage produces corresponding output voltage, and in power module, the umber of turn ratio of transformator must be provided with obtaining phase
When little, to guarantee that power module still can produce corresponding with fixed reference potential defeated under minimum input voltage
Go out voltage, allow power module still be operated the state at full adjustment type (Full-Regulated), otherwise transformation
Umber of turn ratio excessive in device can cause power module cannot produce export corresponding with fixed reference potential
Voltage so that power module loses the feedback regulation function according to output voltage.
But, due to the selection of aforementioned limited umber of turn ratio, therefore when power module is under high input voltage
During operation, outputting inductance therein is typically subjected to the highest volt-seconds value (V × t), causes outputting inductance to have
There are the magnetic core of large-size or more umber of turn, therefore directly limit the power density of power module, and
The efficiency making power module cannot promote.
Summary of the invention
Present invention is to provide a kind of voltage supply system, current transformer therein and Voltage Cortrol side
Method, so as to, when input voltage increases, gradually adjusting output voltage obtained by input voltage is changed, to subtract
The volt-seconds value that few outputting inductance is born.
One embodiment of present invention is that it comprises power model, feedback module about a kind of current transformer
And control module.Power model is in order to be converted to an output voltage by an input voltage.Feedback module and merit
Rate module is electrically connected with, in order to produce a feedback voltage corresponding with output voltage.Control module and power
Module and feedback module are electrically connected with, and control module is in order to compare a duty cycle reference value and a dutycycle number
Value, correspondingly produces a variable reference voltage according to both result of the comparisons, and in order to compare variable reference electricity
Pressure and feedback voltage, and adjust dutycycle numerical value according to its result of the comparison.
In an embodiment of the present invention, when input voltage changes, control module adjusts variable reference voltage also
Correspondingly adjust dutycycle numerical value, and produce corresponding to adjusted dutycycle numerical value drive control signal with
Control power model.
In yet another embodiment of the invention, control module also comprises the first comparison circuit and the first computing electricity
Road.First comparison circuit is in order to compare duty cycle reference value and dutycycle numerical value, to produce duty cycle difference.
First computing circuit and the first comparison circuit are electrically connected with, in order to duty cycle difference to carry out computing to produce also
Adjust variable reference voltage.
In an alternative embodiment of the invention, control module also comprise the second comparison circuit, the second computing circuit with
And drive signal generation circuit.Second comparison circuit and the first computing circuit and feedback module are electrically connected with,
In order to compare variable reference voltage and feedback voltage, to produce error voltage.Second computing circuit and second
Comparison circuit is electrically connected with, in order to error voltage to carry out computing to produce and to adjust dutycycle numerical value.Drive
Signal generating circuit and the second computing circuit and power model are electrically connected with, in order to receive the second computing circuit
Produced dutycycle numerical value, and produce the drive control signal corresponding to dutycycle numerical value.
In a present invention time embodiment, the first comparison circuit is to be electrically connected with the second computing circuit, and in order to
Receive dutycycle numerical value produced by the second computing circuit.
In still another embodiment of the process, the first comparison circuit is to be electrically connected with drive signal generation circuit, and
In order to self-driven signal generating circuit to capture dutycycle numerical value.
In yet another embodiment of the invention, the drive control signal controlling power model is to be exported by control module
After feed back to control module, and the first comparison circuit is in order to receive the drive control signal of feedback, with self-driven
Control signal captures corresponding dutycycle numerical value.
In an alternative embodiment of the invention, when input voltage raises, variable reference voltage is gradually increased, and
Control module adjusts dutycycle numerical value and is gradually increased.
Another embodiment of present invention is about a kind of voltage supply system, its comprise high voltage bus,
Low-voltage bus bar, current transformer and multiple supply voltage generation circuit.Current transformer be electrically connected at high voltage bus with
Between low-voltage bus bar, wherein current transformer includes at least control module, and control module is in order to compare a dutycycle ginseng
Examine value and a dutycycle numerical value, and produce also with dutycycle numerical value result of the comparison according to duty cycle reference value
Adjust a variable reference voltage, then adjust duty according to variable reference voltage and a feedback voltage result of the comparison
Ratio numerical value, and produce the drive control signal corresponding to adjusted dutycycle numerical value, to adjust current transformer
Output voltage.Multiple supply voltage generation circuits are connected in parallel to each other, and are electrically connected at low-voltage bus bar, and each personal
With the output voltage of current transformer is converted to supply voltage give load.
In an embodiment of the present invention, the control module of current transformer also comprises the first comparison circuit and the first fortune
Calculate circuit.First comparison circuit is in order to compare duty cycle reference value and dutycycle numerical value, to produce dutycycle
Difference.First computing circuit is electrically connected with this first comparison circuit, in order to duty cycle difference is carried out computing
To produce and to adjust variable reference voltage.
In an alternative embodiment of the invention, the control module of current transformer also comprise the second comparison circuit,
Two computing circuits and drive signal generation circuit.Second comparison circuit and the first computing circuit are electrically connected with,
In order to compare variable reference voltage and feedback voltage, to produce error voltage.Second computing circuit and second
Comparison circuit is electrically connected with, in order to error voltage to carry out computing to produce and to adjust dutycycle numerical value.Drive
Signal generating circuit and the second computing circuit are electrically connected with, in order to receive duty produced by the second computing circuit
Ratio numerical value, and produce the drive control signal corresponding to dutycycle numerical value.
In a present invention time embodiment, the first comparison circuit is to be electrically connected with the second computing circuit, and in order to
Receive dutycycle numerical value produced by the second computing circuit.
In still another embodiment of the process, the first comparison circuit is to be electrically connected with drive signal generation circuit, and
In order to self-driven signal generating circuit to capture dutycycle numerical value.
In yet another embodiment of the invention, drive control signal be exported by control module after feed back to control mould
Block, and the first comparison circuit is in order to receive the drive control signal of feedback, to capture in self-driven control signal
Corresponding dutycycle numerical value.
In an alternative embodiment of the invention, when an input voltage change of current transformer, control module adjusts can
Becoming reference voltage, and when input voltage raises, variable reference voltage is gradually increased, control module adjusts and accounts for
Sky is gradually increased than numerical value, and the output voltage adjusted according to drive control signal is gradually increased.
The another embodiment of present invention is that it comprises: compares one and accounts for about a kind of voltage adjusting method
Empty than numerical value and a duty cycle reference value；Corresponding to dutycycle numerical value result of the comparison according to duty cycle reference value
Ground produces a variable reference voltage；Relatively variable reference voltage and a feedback voltage；And according to variable reference
Voltage adjusts dutycycle numerical value with feedback voltage result of the comparison so that power model is according to corresponding to dutycycle
The drive control signal of numerical value converts input voltage into an adjusted output voltage.
In an alternative embodiment of the invention, dutycycle numerical value is to be produced by a computing circuit and adjusted.
In a present invention time embodiment, drive control signal is to be produced by a drive signal generation circuit,
And the dutycycle numerical value compared with duty cycle reference value is to capture self-driven signal generating circuit.
In still another embodiment of the process, the dutycycle numerical value compared with duty cycle reference value is that acquisition is self-driven
Control signal.
In yet another embodiment of the invention, aforesaid voltage method of adjustment also comprises when input voltage changes, and adjusts
Whole variable reference voltage, wherein when input voltage raises, variable reference voltage is gradually increased, and dutycycle
Numerical value is adjusted and is gradually increased.
According to the technology contents of the present invention, apply aforementioned embodiments of the invention, outputting inductance can not increased
Volume under, promote current transformer work efficiency, increase power density smoothly.
Accompanying drawing explanation
Fig. 1 is the circuit diagram according to a kind of voltage supply system depicted in one embodiment of the invention；
Fig. 2 is the circuit diagram according to a kind of current transformer depicted in one embodiment of the invention；
Fig. 3 is to illustrate input voltage, variable reference voltage, dutycycle numerical value correspondence according to the embodiment of the present invention
Signal and the respective change schematic diagram of output voltage；
Fig. 4 is the circuit diagram according to a kind of current transformer depicted in another embodiment of the present invention；
Fig. 5 is the circuit diagram according to a kind of current transformer depicted in further embodiment of this invention；
Fig. 6 is the flow chart according to a kind of voltage adjusting method depicted in one embodiment of the invention.
[main element symbol description]
100: voltage supply system
110: high voltage bus
120: current transformer
130: low-voltage bus bar
140: supply voltage generation circuit
150: load
200: current transformer
220: power model
240: feedback module
260a, 260b, 260c: control module
262: the first comparison circuits
264: the first computing circuits
266: the second comparison circuits
268: the second computing circuits
270: driving signal generator
602,604,606,608,610: step
Detailed description of the invention
It is hereafter to coordinate appended accompanying drawing to elaborate for embodiment, but the embodiment provided be not used to limit
The scope that the present invention processed is contained, and the description of structure operation is not used to limit its order performed, Ren Heyou
The structure that element reconfigures, is produced the device with impartial effect, is all the scope that the present invention is contained.
Additionally, accompanying drawing is the most for the purpose of description, and map not according to life size.
About " coupling " used herein or " connection ", all can refer to that two or multiple elements are the most direct
Make entity or in electrical contact, or mutually indirectly put into effect body or in electrical contact, be also referred to as two or multiple element phases
Interoperability or action.
Fig. 1 is the circuit diagram according to a kind of voltage supply system depicted in one embodiment of the invention.Electricity
Pressure supply system 100 comprises high voltage bus (High Voltage Bus) 110, current transformer 120, low-voltage bus bar
(Low Voltage Bus) 130 and multiple supply voltage generation circuit 140.Current transformer 120 is electrically connected with
Between high voltage bus 110 and low-voltage bus bar 130, in order to receive an input voltage through high voltage bus 110
Vin, and input voltage vin is converted to an output voltage Vout transmits via low-voltage bus bar 130.Aforementioned
Supply voltage generation circuit 140 is connected in parallel to each other and is electrically connected at low-voltage bus bar 130, each in order to by current transformer
The output voltage Vout of 200 is converted to a supply voltage and is supplied to load accordingly 150.
Fig. 2 is the circuit diagram according to a kind of current transformer depicted in the embodiment of the present invention.Shown in Fig. 2
Current transformer 200 can be applicable in the voltage supply system 100 shown in Fig. 1, but is not limited.Such as Fig. 2
Shown in, current transformer 200 is including at least power model 220, feedback module 240 and control module 260a.
Power model 220 in order to be converted to output voltage Vout by input voltage vin.Feedback module 240 and merit
Rate module 220 is electrically connected with, and in order to produce feedback voltage V f corresponding with output voltage Vout.Control
Molding block 260a is electrically connected with feedback module 240, power model 220, and in order to compare a dutycycle
(duty ratio) reference value Dref and a dutycycle numerical value Dc, according to duty cycle reference value Dref and duty
A variable reference voltage Vref is correspondingly produced than numerical value Dc result of the comparison, and in order to compare variable reference
Voltage Vref and feedback voltage V f, and compare with feedback voltage V f according to variable reference voltage Vref
Result adjusts dutycycle numerical value Dc.In implementation, duty cycle reference value Dref can be fixed as according to actual demand
Certain numerical value or ratio (such as: 50%).
It is noted that duty cycle reference value Dref herein and dutycycle numerical value Dc, reality can be referred to
The numerical value on border, it is also possible to refer to the signal corresponding to numerical value.In other words, control module 260a may be used to connect
Receive the corresponding signal of both duty cycle reference value Dref and dutycycle numerical value Dc, and to corresponding to both
Signal compare process.
In one embodiment, when input voltage vin changes, control module 260a adjusts variable reference electricity
Pressure Vref also correspondingly adjusts dutycycle numerical value Dc, and control module 260a produces corresponding to being adjusted
Drive control signal Sc of dutycycle numerical value Dc, so as to controlling power model 220 to input voltage vin
Carry out the operation changed, and then adjust the output voltage Vout of current transformer 200.
In implementation, above-mentioned control module 260a or following control module (such as control module 260b in Fig. 4,
Or control module 260c in Fig. 5), all can each pass through numerical digit controller (or control chip) or analogy control
Device processed (or control chip) realizes.
In structure, power model 220 can comprise the first switch element S1, second switch element S2, first
Derided capacitors C1, the second derided capacitors C2, the first rectifier switch SR1, the second rectifier switch SR2, filter
Ripple inductance L1 and filter capacitor Co.First switch element S1, second switch element S2 are respectively with first
Derided capacitors C1, the second derided capacitors C2 are the most in parallel, and the driving that controlled module 260a is exported
Control signal Sc controls, and each carries out turning on (or unlatching) or cut-off (or closedown).First derided capacitors C1
Connect with the second derided capacitors C2, input voltage vin is carried out dividing potential drop, to provide relevant voltage to transformation
The armature winding of device Tr.First rectifier switch SR1's and the second rectifier switch SR2 connection transformer Tr
Secondary windings, in order to carry out synchronous rectification.Filter inductance L1, filter capacitor Co and the first rectifier switch
SR1 connects, in order to be filtered.
Secondly, feedback module 240 can include at least the first impedance Z 1 and the second impedance Z 2, and it is in order to defeated
Go out voltage Vout and carry out dividing potential drop, produce feedback voltage V f corresponding with output voltage Vout whereby.
In another embodiment, feedback module 240 also may be used to the electricity of the output to corresponding output voltage Vout
Stream shunts, and produces the fed-back current signals corresponding with exporting electric current whereby.And control module 260a
Just can be in relatively fed-back current signals and a variable reference current signals (here, variable reference current signals can
Produced accordingly after duty cycle reference value and dutycycle numerical value by comparing) after, according to fed-back current signals with can
Become reference current signal result of the comparison and adjust dutycycle numerical value.In other words, aforementioned feedback module 240 is produced
Raw feedback signal can be feedback voltage signal, it is also possible to be fed-back current signals, and control module 260a
Function with operation can appropriately adjust corresponding to feedback voltage signal or fed-back current signals.
Additionally, control module 260a including at least first comparison circuit the 262, first computing circuit 264, the
Two comparison circuit the 266, second computing circuit 268 and driving signal generators 270.First comparison circuit
262 in order to compare duty cycle reference value Dref and dutycycle numerical value Dc, to produce duty cycle difference Derr.
First computing circuit 264 is electrically connected with the first comparison circuit 262, in order to enter duty cycle difference Derr
Row operation, to produce and to adjust variable reference voltage Vref.Second comparison circuit 266 and the first computing circuit
264 and feedback module 240 be electrically connected with, in order to compare variable reference voltage Vref and feedback module 240
Produced feedback voltage V f, to produce error voltage Verr.Second computing circuit 268 compares with second
Circuit 266 is electrically connected with, in order to error voltage Verr to carry out computing to produce and to adjust dutycycle numerical value
Dc.Driving signal generator 270 is electrically connected with the second computing circuit 268 and power model 220,
In order to receive dutycycle numerical value Dc produced by the second computing circuit 268, and produce corresponding to dutycycle number
Drive control signal Sc of value Dc.
In the present embodiment, the first comparison circuit 262 is electrically connected with the second computing circuit 268, in order to receive
Dutycycle numerical value Dc produced by second computing circuit 268, and dutycycle numerical value Dc is by the second computing circuit
268 are produced and are adjusted, and adjusted after dutycycle numerical value Dc feed back to the first comparison circuit further
262, compare for duty cycle reference value Dref.
Fig. 3 is to illustrate input voltage, variable reference voltage, dutycycle numerical value correspondence according to the embodiment of the present invention
Signal and the respective change schematic diagram of output voltage.Referring concurrently to Fig. 2 and Fig. 3.Work as input voltage
Vin is when time t1 raises or transition is higher levels, owing to variable reference voltage Vref cannot moment phase
Should change immediately on ground, therefore control module 260a can reduce (such as: adjust by the most corresponding dutycycle numerical value Dc of adjustment
Whole dutycycle numerical value Dc is to less than duty cycle reference value Dref) so that output voltage Vout changes the most immediately
Become, but in dutycycle numerical value Dc is follow-up be gradually increased time, output voltage Vout and the feedback of correspondence thereof
Voltage Vf changes along with variable reference voltage Vref again.
Then, during time t1 to t2, owing to dutycycle numerical value Dc is less than duty cycle reference value Dref,
Therefore at the dutycycle numerical value Dc fed back through comparing, after calculation process, the first computing circuit 264 can depend on
According to comparing and operation result adjusts variable reference voltage Vref and gradually rises, until variable reference voltage Vref
It is equal to feedback voltage V f (i.e. in time t2), and simultaneously at the variable reference voltage Vref warp being gradually increased
After comparison, calculation process, the second computing circuit 268 also can be according to comparing and operation result adjustment dutycycle number
Value Dc so that dutycycle numerical value Dc is gradually increased, until dutycycle numerical value Dc is equal to duty cycle reference
Value Dref (i.e. in time t2).
Additionally, driving signal generator 270 can be according to the dutycycle numerical value of change interior during time t1 to t2
Dc, produces corresponding drive control signal Sc so that power model 220 is adjusted according to drive control signal Sc
Turn over change after output voltage Vout, and the output voltage Vout after adjusting also to rise to one in time t2 steady
Definite value, and then allow current transformer 200 enter new stable state.
For known technology, by adjusting dutycycle numerical value Dc in previous embodiment, and and then change
Become the mode of operation of reference voltage Vref, the defeated of current transformer 200 can be made when input voltage vin changes
Go out voltage Vout to change the most immediately, and be as reference voltage Vref change.Consequently, it is possible to current transformer 200
Still gradually output voltage Vout can be adjusted when input voltage vin changes, reduce outputting inductance whereby
The volt-seconds value (V × t) born, makes outputting inductance be not only restricted to have the magnetic core of large-size or more
Umber of turn, and therefore the power density of power model 220 can increase, and the efficiency of current transformer can and then carry
Rise.
Fig. 4 is the circuit diagram according to the current transformer depicted in another embodiment of the present invention.Compared to Fig. 2
For, in the present embodiment, the first comparison circuit 262 in control module 260b is electrically connected with and drives letter
Number produce circuit 270, and in order in self-driven signal generating circuit 270 capture dutycycle numerical value Dc, than
Relatively capture the dutycycle numerical value Dc in self-driven signal generating circuit 270 and duty cycle reference value Dref.
Control module 260b and power model 220, the connection of feedback module 240 and operative relationship are all with front
State similar, therefore repeat no more in this.Additionally, in control module 260b the connection of element and operative relationship be also
Similar with the embodiment shown in Fig. 2, therefore also repeat no more in this.
Fig. 5 is the circuit diagram according to the current transformer depicted in further embodiment of this invention.Compared to Fig. 2
For, in the present embodiment, the first comparison circuit 262 in control module 260c is in order to receive by controlling
Feed back to drive control signal Sc of control module 260c after the output of module 260c, and compare acquisition self-powered
Dutycycle numerical value Dc in dynamic control signal Sc and duty cycle reference value Dref.
Control module 260c and power model 220, the connection of feedback module 240 and operative relationship are all with front
State similar, therefore repeat no more in this.Additionally, in control module 260c the connection of element and operative relationship be also
Similar with the embodiment shown in Fig. 2, therefore also repeat no more in this.
Fig. 6 is the flow chart according to a kind of voltage adjusting method depicted in one embodiment of the invention.In order to clearly
For the sake of Chu and convenient explanation, the explanation of following embodiment is referring to Fig. 2 and Fig. 6.First, one is compared
Dutycycle numerical value Dc and duty cycle reference value Dref (step 602), then according to dutycycle numerical value Dc and accounting for
The empty comparative result than reference value Dref produces variable reference voltage Vref (step 604) accordingly.Then, than
Relatively variable reference voltage Vref and feedback voltage V f (step 606), and according to variable reference voltage Vref with
The comparative result of feedback voltage V f adjusts dutycycle numerical value Dc until dutycycle numerical value Dc is equal to dutycycle
Reference value Dref (step 608).Then, power model 220 is according to corresponding to this dutycycle numerical value Dc's
Input voltage vin is converted into the regulated output voltage Vout (step after adjusting by drive control signal Sc
610)。
In one embodiment, the dutycycle numerical value Dc in above-mentioned voltage adjusting method can be the second computing electricity
Road 268 is produced and is adjusted.
In one embodiment, aforesaid voltage method of adjustment more can comprise when input voltage vin changes, and adjusts
Variable reference voltage Vref.When input voltage vin raises, variable reference voltage Vref is gradually increased,
Dutycycle numerical value Dc is the most adjusted and is gradually increased.
In another embodiment, the dutycycle numerical value self-driven signal of Dc fechtable in this voltage adjusting method
Producing circuit 270, when input voltage vin raises, variable reference voltage Vref is gradually increased, dutycycle
Numerical value Dc is the most adjusted and is gradually increased.
In another embodiment, the dutycycle numerical value Dc in this voltage adjusting method captures self-driven control letter
Number Sc, drive control signal Sc is fed back to control module 260c by after exporting such as control module 260c of Fig. 5
And received by the first comparison circuit 262, when input voltage vin raises, variable reference voltage Vref
Being gradually increased, dutycycle numerical value Dc is the most adjusted and is gradually increased.
Step mentioned in the present embodiment, in addition to chatting its order person bright especially, all can adjust according to practical situation
Its sequencing whole, the flow chart shown in Fig. 6 is only an embodiment, is not limited to the present invention.
From embodiments of the invention described above, apply embodiments of the invention described above, can change in input voltage
Gradually output voltage is adjusted during change, reduce the volt-seconds value (V × t) that outputting inductance is born whereby, make defeated
Go out magnetic core or more umber of turn that inductance is not only restricted to have large-size, needn't be for avoiding output
The magnetic core of inductance is saturated and increases its volume, and therefore the power density of power model 220 also can increase, and becomes
The efficiency of stream device can and then promote..
Although the present invention is disclosed above with embodiment, so it is not limited to the present invention, any familiar
This those skilled in the art, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations, therefore
Protection scope of the present invention is when being defined in the range of standard depending on appending claims.
Claims (20)
1. a current transformer, it is characterised in that this current transformer includes at least:
One power model, in order to be converted to an output voltage by an input voltage；
One feedback module, is electrically connected with this power model, in order to produce corresponding with this output voltage
Feedback voltage；And
One control module, is electrically connected with this power model and this feedback module, wherein this control module in order to
A relatively duty cycle reference value and a dutycycle numerical value, according to this duty cycle reference value and this dutycycle numerical value
Result of the comparison correspondingly produces a variable reference voltage, and anti-in order to compare this variable reference voltage and this
Feedthrough voltage, and adjust this dutycycle numerical value according to this variable reference voltage and this feedback voltage result of the comparison,
Wherein, when this input voltage changes, this control module adjusts this variable reference voltage, and according to this
This output voltage is gradually adjusted by the change of variable reference voltage.
Current transformer the most according to claim 1, it is characterised in that this control module produce corresponding to
One drive control signal of this adjusted dutycycle numerical value is to control this power model.
Current transformer the most according to claim 2, it is characterised in that this control module also comprises:
One first comparison circuit, in order to compare this duty cycle reference value and this dutycycle numerical value, to produce one
Duty cycle difference；And
One first computing circuit, is electrically connected with this first comparison circuit, in order to carry out this duty cycle difference
Computing is to produce and to adjust this variable reference voltage.
Current transformer the most according to claim 3, it is characterised in that this control module also comprises:
One second comparison circuit, is electrically connected with, in order to compare with this first computing circuit and this feedback module
This variable reference voltage and this feedback voltage, to produce an error voltage；
One second computing circuit, is electrically connected with this second comparison circuit, in order to transport this error voltage
Calculate to produce and adjust this dutycycle numerical value；And
One drive signal generation circuit, is electrically connected with this second computing circuit and this power model, in order to
Receive this second computing circuit this dutycycle numerical value produced, and produce being somebody's turn to do corresponding to this dutycycle numerical value
Drive control signal.
Current transformer the most according to claim 4, it is characterised in that this first comparison circuit is electrical
Connect this second computing circuit, and in order to receive this dutycycle numerical value produced by this second computing circuit.
Current transformer the most according to claim 4, it is characterised in that this first comparison circuit is electrical
Connect this drive signal generation circuit, and in order to capture this dutycycle number in this drive signal generation circuit
Value.
Current transformer the most according to claim 4, it is characterised in that this controlling this power model drives
Dynamic control signal be exported by this control module after feed back to this control module, and this first comparison circuit in order to
Receive this drive control signal of feedback, to capture this dutycycle number corresponding in this drive control signal
Value.
Current transformer the most according to claim 1, it is characterised in that when this input voltage raises,
This variable reference voltage is gradually increased, and this control module adjusts this dutycycle numerical value and is gradually increased.
9. a voltage supply system, it is characterised in that this voltage supply system includes at least:
One high voltage bus；
One low-voltage bus bar；
One current transformer, is electrically connected between this high voltage bus and this low-voltage bus bar, and wherein this current transformer is at least
Comprise a control module, this control module in order to compare a duty cycle reference value and a dutycycle numerical value, and
Produce and adjust a variable reference voltage according to this duty cycle reference value and this dutycycle numerical value result of the comparison,
Adjust this dutycycle numerical value according to this variable reference voltage and a feedback voltage result of the comparison again, and produce right
Should be in a drive control signal of this adjusted dutycycle numerical value, to adjust an output electricity of this current transformer
Pressure；And
Multiple supply voltage generation circuits, are connected in parallel to each other and are electrically connected at this low-voltage bus bar, and each in order to incite somebody to action
This output voltage of this current transformer is converted to a supply voltage and gives a load,
Wherein, when an input voltage change of this current transformer, this control module adjusts this variable reference voltage,
And gradually this output voltage is adjusted according to the change of this variable reference voltage.
Voltage supply system the most according to claim 9, it is characterised in that this control of this current transformer
Molding block also comprises:
One first comparison circuit, in order to compare this duty cycle reference value and this dutycycle numerical value, to produce one
Duty cycle difference；And
One first computing circuit, is electrically connected with this first comparison circuit, in order to carry out this duty cycle difference
Computing is to produce and to adjust this variable reference voltage.
11. voltage supply systems according to claim 10, it is characterised in that being somebody's turn to do of this current transformer
Control module also comprises:
One second comparison circuit, is electrically connected with this first computing circuit, in order to compare this variable reference voltage
And this feedback voltage, to produce an error voltage；
One second computing circuit, is electrically connected with this second comparison circuit, in order to transport this error voltage
Calculate to produce and adjust this dutycycle numerical value；And
One drive signal generation circuit, is electrically connected with this second computing circuit, in order to receive this second computing
Circuit this dutycycle numerical value produced, and produce this drive control signal corresponding to this dutycycle numerical value.
12. voltage supply systems according to claim 11, it is characterised in that this first comparison is the most electric
Road is to be electrically connected with this second computing circuit, and in order to receive this dutycycle produced by this second computing circuit
Numerical value.
13. voltage supply systems according to claim 11, it is characterised in that this first comparison is the most electric
Road is to be electrically connected with this drive signal generation circuit, and accounts in order to capture this in this drive signal generation circuit
Sky compares numerical value.
14. voltage supply systems according to claim 11, it is characterised in that this driving controls letter
Number be exported by this control module after feed back to this control module, and this first comparison circuit is in order to receive feedback
This drive control signal, to capture this dutycycle numerical value corresponding in this drive control signal.
15. voltage supply systems according to claim 11, it is characterised in that when this input voltage
During rising, this variable reference voltage is gradually increased, and this control module adjusts this dutycycle numerical value and is gradually increased,
And this output voltage adjusted according to this drive control signal is gradually increased.
16. 1 kinds of voltage adjusting methods, it is characterised in that this voltage adjusting method comprises:
A relatively dutycycle numerical value and a duty cycle reference value；
A variable reference is correspondingly produced according to this duty cycle reference value and this dutycycle numerical value result of the comparison
Voltage；
Relatively this variable reference voltage and a feedback voltage；
This dutycycle numerical value is adjusted so that one according to this variable reference voltage and this feedback voltage result of the comparison
One input voltage is converted into by power model according to the drive control signal corresponding to this dutycycle numerical value
The output voltage adjusted；And
When this input voltage changes, adjust this variable reference voltage, and according to the change of this variable reference voltage
Change and gradually this output voltage is adjusted.
17. voltage adjusting methods according to claim 16, it is characterised in that this dutycycle numerical value
It is to be produced by a computing circuit and adjusted.
18. voltage adjusting methods according to claim 16, it is characterised in that this driving controls letter
Number it is to be produced by a drive signal generation circuit, and this dutycycle numerical value compared with this duty cycle reference value
It is to capture from this drive signal generation circuit.
19. voltage adjusting methods according to claim 16, it is characterised in that join with this dutycycle
Examining this dutycycle numerical value that value compares is to capture from this drive control signal.
20. voltage adjusting methods according to claim 16, it is characterised in that also comprise:
When this input voltage raises, this variable reference voltage is gradually increased, and this dutycycle numerical value is adjusted
And be gradually increased.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210357145.8A CN103683944B (en) | 2012-09-21 | 2012-09-21 | Voltage supply system and current transformer therein and voltage adjusting method |
| TW101142837A TWI460977B (en) | 2012-09-21 | 2012-11-16 | Voltage supply system and converter therein, and voltage regulating method |
| US13/921,363 US9225251B2 (en) | 2009-07-29 | 2013-06-19 | Duty cycle control method, power supply system and power converter using the same |
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| CN201210357145.8A CN103683944B (en) | 2012-09-21 | 2012-09-21 | Voltage supply system and current transformer therein and voltage adjusting method |
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| CN104093195B (en) * | 2014-07-17 | 2017-11-17 | 中国联合网络通信集团有限公司 | A kind of method and system for realizing gateway selection |
| CN105763032B (en) * | 2014-12-15 | 2018-07-06 | 台达电子工业股份有限公司 | Electronic device and its control method |
| DE102015224858A1 (en) * | 2015-12-10 | 2017-06-14 | Robert Bosch Gmbh | Method and device for controlling a galvanically isolated DC-DC converter |
| CN107689734B (en) * | 2016-08-05 | 2020-01-31 | 台达电子企业管理（上海）有限公司 | High power conversion system |
| CN112416040A (en) * | 2019-08-21 | 2021-02-26 | 北京比特大陆科技有限公司 | Parallel power supply voltage adjusting method, device, equipment, system and storage medium |
| US11923779B2 (en) | 2020-11-05 | 2024-03-05 | Astec International Limited | Control circuits and methods for regulating output voltages |
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| TWI460977B (en) | 2014-11-11 |
| CN103683944A (en) | 2014-03-26 |
| TW201414153A (en) | 2014-04-01 |
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