CN106559002B - Circuit converter control system - Google Patents
Circuit converter control system Download PDFInfo
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- CN106559002B CN106559002B CN201510624899.9A CN201510624899A CN106559002B CN 106559002 B CN106559002 B CN 106559002B CN 201510624899 A CN201510624899 A CN 201510624899A CN 106559002 B CN106559002 B CN 106559002B
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Abstract
The present invention provides a kind of circuit converter control system, it is electrically connected at a circuit converter comprising an input stage circuit, a load switch and an output-stage circuit, in circuit converter control system, filter is that the different time feedbacking output voltage of digital signal samples out historical feedback average voltage to be exported in the different time according to output end.Control module is equipped with voltage threshold value, exported receiving output end be digital signal immediate feedback output voltage, and the load condition of circuit converter is detected according to historical feedback average voltage, control module controls load switch with a control responsibility cycle, when load condition is transferred to from a light condition and reaches voltage threshold value to a heavy condition and voltage differences value, increase control responsibility cycle to control load switch, it is on the contrary then reduce control responsibility cycle.Therefore, the present invention be not required to again it is time-consuming re-start circuit design, and can effectively avoid circuit converter lead to the problem of overshoot with load reduction.
Description
Technical field
The present invention relates to a kind of circuit converter control system more particularly to a kind of use digitizer control and foundations
The circuit converter control system of light condition and heavy condition adjustment responsibility cycle.
Background technology
With the progress that science and technology is with rapid changepl. never-ending changes and improvements, electronic device has been full of in people’s lives, wherein with consumption-orientation
The energy saving form of electronics and for environmental protection attention, electronic product require lower-wattage can be consumed when standby, to extend battery
Usage time and reduction power consumption, therefore how circuit converter is designed to the project to be solved in industry.
Referring to Fig. 1, Fig. 1 is the block schematic diagram for the power supply changeover device for showing the prior art of the present invention, it is however generally that, it returns
Formula of speeding circuit converter includes that an analog pulse width modulation (Pulse Width Moulation, PWM) controls handover module
PA1 and a circuit converter PA2, circuit converter PA2 are electrically connected at analog PWM controls handover module PA1, and circuit
Converter PA2 generally comprise a bridge rectifier PA21, a transformer PA22, a filter circuit PA23, a load switch PA24,
One feedback circuit PA25, a compensation circuit PA26 and a load resistance PA27, transformer PA22 are electrically connected at bridge rectifier
Device PA21, and it is electrically connected at filter circuit PA23, load switch PA24 is electrically connected at transformer PA22 and load resistance
PA27, feedback circuit PA25 are electrically connected at filter circuit PA23 and compensation circuit PA26, and compensation circuit PA26 electrically connects
It is connected to analog PWM control handover modules PA1.
And analog PWM control handover module PA1 control unlatching and the pass of load switch PA24 according to the situation of load
It closes, analog PWM control handover module PA1 is electrically connected at circuit converter PA2, and it is mainly by such as lead-edge-blanking
(Leading Edge Blanking, LEB) circuit, oscillator, error amplifier, exclusive circuit and comparator etc. is formed.
However, in general, relatively being lacked flexibility using the design of such analog circuit, specifically, if circuit converter PA2 to be made
Operate in continuous conduction mode (Continuous Conduction Mode, CCM), discontinuous conduction mode
(Discontinuous Conduction Mode, DCM) or boundary conduction mode (Boundary Conduction Mode,
It when circuit BCM) need to be changed, is limited to the framework of analog circuit and can not reprogram, thus internal electricity need to be redesigned
Road and compensation circuit PA26 so that more inconvenient when in use in practice.
Invention content
It is to be controlled load switch with analog circuit in view of the prior art, thus in the framework of analog circuit
Under, generally there is the problem of modification circuit when need to be cost with the difference of operation mode.Edge this, the present invention provides a kind of circuit
Converter control system, the mode for mainly adopting number design circuit, to solve the above problem.
Based on above-mentioned purpose, technical way of the present invention provides a kind of circuit converter control system, electricity
Property be connected to a circuit converter, circuit converter includes an input stage circuit, a load switch and an output-stage circuit, is born
Load switch is electrically connected at input stage circuit, and output-stage circuit is electrically connected at input stage circuit and is arranged, circuit converter control
System processed includes an analog-digital converter (Analog-to-Digital Converter, ADC), a filter and a control
Molding block.Analog-digital converter is electrically connected at an output end of output-stage circuit, to by output end in different time institute
Output is that a different time feedbacking output voltage of analog signal is converted to the different time feedbacking output voltage of digital signal,
And to be exported output end it is that an immediate feedback output voltage of analog signal is converted to the immediate feedback of digital signal
Output voltage.Filter is electrically connected at analog-digital converter, to according to the different time feedbacking output for being digital signal
Voltage sampling goes out a historical feedback average voltage.Control module is electrically connected at analog-digital converter, filter and load and opens
Close, be equipped with a voltage threshold value, exported receiving output end be digital signal immediate feedback output voltage, and to
A load condition of circuit converter is detected according to historical feedback average voltage；Control module is according to immediate feedback output electricity
Pressure obtains a voltage differences value with historical feedback average voltage.Wherein, control module is opened with a control responsibility cycle control load
It closes, detecting that load condition is transferred to from a light condition to a heavy condition and voltage differences value in control module reaches voltage threshold
When value, increase control responsibility cycle to control load switch；Control module detect load condition from heavy condition be transferred to
When light condition and voltage differences value reach voltage threshold value, control responsibility cycle is reduced to control load switch.
Wherein, in the preferred embodiment of the attached technological means of foregoing circuit converter control system, circuit converter control
System processed includes also an analog-digital converter (Analog-to-Digital Converter, ADC), is electrically connected at output
End, filter and control module, will be that the different time feedbacking output voltage of analog signal is converted to the phase of digital signal
Feedback output voltage between different time, and will be that the immediate feedback output voltage of analog signal is converted to the instant anti-of digital signal
Present output voltage.In addition, circuit converter control system also includes a drive module, drive module is electrically connected at control module
With load switch, to drive load switch to the control of load switch according to control module, and circuit converter is a flyback
Formula converter.
Wherein, in the preferred embodiment of the attached technological means of foregoing circuit converter control system, circuit converter control
System processed also include one can program processing module, can program processing module include an opening time lookup unit and one close when
Between lookup unit, opening time lookup unit is electrically connected at analog-digital converter and control module, and it is defeated to be equipped with immediate feedback
The correspondence for going out voltage and an opening time, to according to be digital signal immediate feedback output voltage obtain it is corresponding
Opening time, the one first of opening time signal of tabling look-up will be represented by, which using, is sent to control module.Shut-in time lookup unit electricity
Property be connected to filter and control module, be equipped with historical feedback average voltage and a shut-in time correspondence, to foundation
Historical feedback average voltage obtains the corresponding shut-in time, and the one second of shut-in time signal of tabling look-up will be represented by, which using, is sent to
Control module, wherein control module according to first table look-up signal with second table look-up signal adjustment control responsibility cycle.
Wherein, in another preferred embodiment of the attached technological means of foregoing circuit converter control system, circuit conversion
Device control system include one can program processing module, can program processing module include a range multiplier, one first multiplexer and one
Second multiplexer, range multiplier are electrically connected at analog-digital converter, are equipped with a multiplying power preset value, and will be digital signal
Immediate feedback output voltage and multiplying power preset value carry out operation, use and generate a multiplying power operation values.First multiplexer to according to
A underloading is selectively received according to load condition turns heavily loaded opening time value and one in a heavy duty turn underloading opening time value,
And the second multiplexer is electrically connected at range multiplier, the first multiplexer and control module, to turn from light condition in load condition
When entering to heavy condition, is received the underloading that the first multiplexer is transmitted by triggering and turn heavily loaded opening time value, and underloading is turned into weight
It carries opening time value and is sent to control module；Second multiplexer and to be transferred to from heavy condition to light condition in load condition
When, it is received the heavy duty that the first multiplexer is transmitted by triggering and turns underloading opening time value, and heavy duty is turned into underloading opening time value
It is sent to control module, wherein when load condition is to maintain the original state, the second multiplexer maintains output multiplying power operation values.
It wherein, can be at program in another preferred embodiment of the attached technological means of foregoing circuit converter control system
It includes a shut-in time lookup unit, a third multiplexer and one the 4th multiplexer, shut-in time lookup unit electricity to manage module
Property be connected to filter, be equipped with historical feedback average voltage and a shut-in time a mapping table, to foundation history it is anti-
Feedback average voltage is obtained and is sent out the corresponding shut-in time, and third multiplexer selectively receives to foundation load condition
One underloading turns heavily loaded shut-in time value and heavily loaded one turned in underloading shut-in time value, and the 4th multiplexer is electrically connected at pass
Time lookup unit, third multiplexer and control module are closed, to when load condition is transferred to from light condition to heavy condition,
The underloading that third multiplexer is transmitted is received by triggering and turns heavily loaded shut-in time value, and underloading is turned into heavily loaded shut-in time value transmission
To control module；4th multiplexer and to when load condition is transferred to from heavy condition to light condition is received the by triggering
The heavy duty that three multiplexers are transmitted turns underloading shut-in time value, and heavy duty is turned underloading shut-in time value and is sent to control module,
Wherein, when load condition is to maintain the original state, the 4th multiplexer maintains the output shut-in time.
Through the invention after the technical way of used circuit converter control system, due to being using digitlization
Control, thus can be reprogramed in response to different operation modes, thus be not required to again it is time-consuming re-start circuit design, in addition,
Also due to the difference using average value and immediate feedback value judges, thus can be effectively adjusted at any time according to heavy duty is different with what is be lightly loaded
The size of responsibility cycle, and then can effectively avoid circuit converter and generate overshoot (overshoot) and load reduction (load
Drop) the problem of.
Specific embodiment of the present invention will be further described by embodiment below and attached drawing.
Description of the drawings
Fig. 1 is the block schematic diagram for the power supply changeover device for showing the prior art of the present invention；
Fig. 2 is that the square for the circuit converter control system and circuit converter for showing present pre-ferred embodiments is illustrated
Figure；
Fig. 3 is to show that the light condition of present pre-ferred embodiments turns the waveform diagram of heavy condition；
Fig. 4 is to show that the heavy condition of present pre-ferred embodiments turns the waveform diagram of light condition；
Fig. 5 be another preferred embodiment of the display present invention can program processing module block schematic diagram.
Reference sign：
PA1：Analog PWM controls handover module；
PA2：Circuit converter；
PA21：Bridge rectifier；
PA22：Transformer；
PA23：Filter circuit；
PA24：Load switch；
PA25：Feedback circuit；
PA26：Compensation circuit；
PA27：Load resistance；
1：Circuit converter control system；
11、11a：Analog-digital converter；
12、12a：Filter；
13、13a：Control module；
131、131a：The time variable table of comparisons；
14、14a：It can program processing module；
141：Opening time lookup unit；
1411：First mapping table；
142：Shut-in time lookup unit；
1421：Second mapping table；
143a：Range multiplier；
144a：First multiplexer；
145a：Second multiplexer；
146a：Shut-in time lookup unit；
1461a：Mapping table；
147a：Third multiplexer；
148a：4th multiplexer；
15：Drive module；
2：Circuit converter；
21：Input stage circuit；
22：Load switch；
23：Load resistance；
24：Output-stage circuit；
241：Output end；
S1：First tables look-up signal；
S2：Second tables look-up signal；
t0、t1：Time.
Specific implementation mode
Since in circuit converter control system provided by the present invention, a combination thereof embodiment is too numerous to enumerate, therefore herein
It no longer repeats one by one, only enumerates a preferred embodiment and illustrated.
Referring to Fig. 2, Fig. 2 is the circuit converter control system and circuit converter for showing present pre-ferred embodiments
Block schematic diagram.
As shown, the circuit converter control system 1 of present pre-ferred embodiments is electrically connected at a circuit converter
2, circuit converter 2 can be a direction flyback converter, but without being limited thereto in other embodiment, and circuit converter 2 includes an input
Grade circuit 21, a load switch 22, a load resistance 23 and an output-stage circuit 24, input stage circuit 21 have generally comprised friendship
Galvanic electricity source, bridge rectifier, decoupling capacitance (bulk capacitor), inductance, diode, capacitance and transformer element,
For the prior art, repeat no more, and load switch 22 is electrically connected at the transformer in input stage circuit 21,23 electricity of load resistance
Property is connected to load switch 22, and output-stage circuit 24 is electrically connected at input stage circuit 21, specifically, also may include there is filter
The elements such as wave circuit, feedback circuit and compensation circuit are similarly the prior art, repeat no more.
Circuit converter control system 1 include an analog-digital converter (Analog-to-Digital Converter,
ADC) 11, one filter 12, a control module 13, one can program processing module 14 and a drive modules 15.Simulation numeral turns
Parallel operation 11 is electrically connected at an output end 241 of output-stage circuit 24, and needs one to be mentioned that herein, present pre-ferred embodiments
Signified electric connection may include directly being electrically connected and be electrically connected indirectly, wherein 11 compensated electricity of analog-digital converter
Road and feedback circuit and be electrically connected at output end 241 indirectly.Filter 12 is electrically connected at analog-digital converter 11, and can
For a root mean square (RMS) low-pass filter, but other circuits with sample mean ability can be used in other embodiment.
Control module 13 is electrically connected at analog-digital converter 11, filter 12 and load switch 22, and control module
13 may be, for example, a microcontroller or other functional circuits with processing function, and control module 13 is electrically connected at indirectly
Load switch 22, and it is equipped with a voltage threshold value, it (can be positive or negative, general use that the unit of this voltage threshold value, which can be voltage,
Positive value), and visual practice circuit and determine, present pre-ferred embodiments can be 80 only for 120, in other embodiment, 90,
100, the numerical value such as 120,140.
Can program processing module 14 can be can program gain controller, and include an opening time lookup unit 141 and
One shut-in time lookup unit 142, opening time lookup unit 141 are electrically connected at analog-digital converter 11 and control module
13, and it is equipped with one first mapping table 1411, this first mapping table 1411 has immediate feedback output voltage and opens
The correspondence of time, for example, shown in following table one (it is without being limited thereto in other embodiment, below only in the form of digital 8-bit
It shows, still depending on the design in practice, and immediate feedback output voltage is bigger, and the opening time is then bigger)：
One ＞ of ＜ tables
| Immediate feedback output voltage | Opening time (ns) |
| 11000110 | 10 |
| 11001001 | 12 |
| 11100010 | 14 |
Shut-in time lookup unit 142 is electrically connected at filter 12 and control module 13, and corresponds to and close equipped with one second
It is table 1421, this second mapping table 1421 has the correspondence of historical feedback average voltage and shut-in time, such as
Shown in following table two (it is without being limited thereto in other embodiment, it is only shown in the form of digital 8-bit, is still regarded in practice below
Design depending on, and historical feedback average voltage is bigger, and the shut-in time is then smaller)：
Two ＞ of ＜ tables
| Historical feedback average voltage | Shut-in time (ns) |
| 00000110 | 8 |
| 00011000 | 6 |
| 00100101 | 4 |
And need one to be mentioned that herein, a time variable table of comparisons 131, this time parameter pair can be equipped in control module 13
Can be immediate feedback output voltage, historical feedback average voltage, voltage differences value, above-mentioned opening time, above-mentioned closing according to table 131
The correspondence of time and a time variable value, but it is without being limited thereto in other embodiment, and time variable value can be multiple
Value or a fixed numbers are generally up to 95%, minimum 5%, chat hereby bright if fixed numbers.
Drive module 15 is electrically connected at control module 13 and load switch 22, may include having switching point prediction circuit with
Switch driving circuit, this switching point prediction circuit is the prior art with switch driving circuit, therefore is repeated no more.
Also referring to Fig. 2 to Fig. 4, Fig. 3 is to show that the light condition of present pre-ferred embodiments turns the wave of heavy condition
Shape schematic diagram, Fig. 4 are to show that the heavy condition of present pre-ferred embodiments turns the waveform diagram of light condition.As shown,
Wherein, after the input stage circuit 21 of circuit converter 2 provides alternating current, mould can be generated in the output end 241 of output-stage circuit 24
The output voltage of quasi- formula simultaneously feeds back to circuit converter control system 1, and analog-digital converter 11 can be analog defeated by this
Go out voltage and be converted to digital signal, wherein due to output end 241 the different time (such as the 1st second, the 2nd second with the 3rd second) can divide
Corresponding output voltage is not exported, and it is mould that analog-digital converter 11, which can be exported output end 241 in the different time,
One different time feedbacking output voltage of quasi- signal is converted to the different time feedbacking output voltage of digital signal (assuming that present tense
Between be the 4th second, the 1st to 3 second output voltage is defined as different time feedbacking output voltage), and to by 241 institute of output end
Output is that an immediate feedback output voltage of analog signal is converted to the immediate feedback output voltage of digital signal (assuming that now
Time is the 4th second, and immediate feedback output voltage is output voltage at this time).
Filter 12 samples out a historical feedback average voltage according to for the different time feedbacking output voltage of digital signal,
Its sampling method is averaged after for example, sampling above three value, but without being limited thereto in other embodiment.In addition, control mould
Block 13 can detect that the one of circuit converter 2 is negative according to historical feedback average voltage after receiving historical feedback average voltage
Load state, and this load condition refers to light condition and heavy condition, detection mode is, for example, to be equipped with gently in control module 13
Load judges that setting value (be, for example, 62V) judges setting value (for example, 182V) with heavy duty, if historical feedback average voltage be less than or
Judge that setting value then judges load condition for underloading equal to underloading, judgement is set if historical feedback average voltage is greater than or equal to heavy duty
Definite value is then judged as heavy duty.Control module 13 can receive output end 241 and exported be digital signal immediate feedback output electricity
Pressure, and according to immediate feedback output voltage with historical feedback average voltage obtain a voltage differences value (this voltage differences value is general
It can take absolute value).
Wherein, control module 13 controls the open and close of load switch 22 with a control responsibility cycle, as shown in figure 3,
It detected that at t0 seconds, load condition is transferred to from above-mentioned light condition to heavy condition and voltage differences value in control module 13 to reach
When voltage threshold value, into fast transfer pattern (Fast Transient Mode；FTM) increase control responsibility cycle to control
Load switch 22 processed, for example, if control responsibility cycle is 40%, then can increase to control responsibility cycle instantly
80%；In addition, as shown in figure 4, detecting that load condition was transferred to from heavy condition to light condition in t1 seconds in control module 13
And voltage differences value reach voltage threshold value when, into fast transfer pattern and reduce control responsibility cycle to control load switch
22, for example, if control responsibility cycle is 40%, then 20% can be reduced to control responsibility cycle in instantly.
And the method for above-mentioned increase and reduction can be transported by opening time lookup unit 141 and shut-in time lookup unit 142
Make and obtain, specifically, opening time lookup unit 141 can foundation for digital signal immediate feedback output voltage and arrive first
Mapping table 1411 obtains the corresponding opening time instantly, and the one first of the opening time will be represented by, which using, tables look-up signal S1
It is sent to control module 13；In addition, shut-in time lookup unit 142 can arrive according to historical feedback average voltage, the second correspondence is closed
It is that table 1421 obtains the corresponding shut-in time instantly, the one second of the shut-in time signal S2 that tables look-up will be represented by, which using, is sent to
Control module 13, control module 13 are tabled look-up the count values of signal S2 control counters according to the first signal S1 and second that tables look-up, into
And adjust and increase or decrease control responsibility cycle, and trigger control of the drive module 15 according to control module 13 to load switch 22
(that is, control responsibility cycle after adjusting) driving load switch 22 is turned on and off.
For example, above-mentioned light condition is transferred into the control method of heavy condition, such as first tables look-up signal S1 institutes
The numerical value represented is 10 (ns), and the second numerical value tabled look-up representated by signal S2 is 8 (ns), and control module 13 is according to immediately anti-
When feedback output voltage judges that coming from light condition is transferred to heavy condition with historical feedback average voltage, control module 13 can foundation
Its time variable table of comparisons 131 being equipped with (such as when can obtain that voltage differences value, opening time are with closing under heavy condition
Between corresponding time variable value), by original opening time and a time variable value, operation (such as can be opened original each other
Opening the time is multiplied by time variable value), and operation (such as can will be original each other for original shut-in time and another time variable value
Shut-in time is multiplied by another time variable value, can be directly adjusted to original opening time such as 95% most in other embodiment
Big value, the shut-in time is then adjusted to the minimum value such as 5%, depending on voltage differences value, is adjusted if voltage differences value is bigger
Amplitude is bigger), and then rapidly promote control responsibility cycle；Similarly, above-mentioned heavy condition is transferred to the control of light condition
In method, such as the first numerical value for tabling look-up representated by signal S1 is 20 (ns), and the second numerical value tabled look-up representated by signal S2 is 5
(ns), and control module 13 according to immediate feedback output voltage and historical feedback average voltage judge from heavy condition be transferred to
When light condition, the time variable table of comparisons 131 that control module 13 can be equipped with according to it (such as can obtain under light condition
Time variable value corresponding to voltage differences value, opening time and shut-in time), by original opening time and a time variable
Value operation (such as original opening time can be multiplied by time variable value) each other, and original shut-in time becomes with another time
Numerical value each other operation (such as can be multiplied by another time variable value original shut-in time, can directly will be former in other embodiment
Some opening times are adjusted to the minimum value such as 5%, and the shut-in time is then adjusted to the maximum value such as 95%, voltage differences value and
Determine, it is bigger to adjust amplitude if voltage differences value is bigger), and then control responsibility cycle is rapidly reduced, it these are only citing, and
It is non-to limit the scope of the present invention, chat hereby bright.
Referring to Fig. 5, Fig. 5 be another preferred embodiment of the display present invention can program processing module block schematic diagram.
As shown in figure 5, the place different from above-mentioned preferred embodiment is, can program processing module 14a include a range multiplier 143a, one
First multiplexer 144a, one second multiplexer 145a, a shut-in time lookup unit 146a, a third multiplexer 147a and one
4th multiplexer 148a, range multiplier 143a are electrically connected at analog-digital converter 11a, are equipped with a multiplying power preset value, this multiplying power
Preset value is, for example, the multiple (without being limited thereto in other embodiment) between 0.1 to 2, and the second multiplexer 145a is electrically connected at again
Rate device 143a, the first multiplexer 144a and control module 13a.Shut-in time, lookup unit 146a was electrically connected at filter 12a,
A mapping table 1461a equipped with historical feedback average voltage identical with above-mentioned preferred embodiment and shut-in time.4th
Multiplexer 148a is electrically connected at shut-in time lookup unit 146a, third multiplexer 147a and control module 13a.
Range multiplier 143a uses will be that the immediate feedback output voltage of digital signal carries out operation with multiplying power preset value
A multiplying power operation values are generated, specifically, immediate feedback output voltage are multiplied by multiplying power preset value, to obtain above-mentioned multiplying power
Operation values, but it is without being limited thereto in other embodiment.First multiplexer 144a then selectively receives one to foundation load condition
Underloading turns heavily loaded opening time value and heavily loaded one turned in underloading opening time value, and needs one to be mentioned that herein, multiplying power
It is all that can be rewritten according to Practical Operation that preset value, underloading, which turn heavily loaded opening time value and heavy duty turn underloading opening time value,
's.
Shut-in time lookup unit 146a is obtained to foundation historical feedback average voltage and is sent out corresponding closing
Time, and third multiplexer 147a turns heavily loaded shut-in time value and a weight selectively to receive a underloading according to load condition
Idling is lightly loaded one in shut-in time value, and similarly, underloading turns heavily loaded shut-in time value and turns underloading shut-in time value with heavy duty
And it can be rewritten according to Practical Operation.
Wherein, load condition be maintain the original state and not from light condition go to heavy condition or from heavy condition turn
When entering to light condition, the second multiplexer 145a maintains output multiplying power operation values, when the 4th multiplexer 148a maintains output to close
Between, that is to say, that in the case where load condition does not change, the second multiplexer 145a and the 4th multiplexer 148a are dimensions
Hold former output (being exported respectively according to the operation result of range multiplier 143a and the checking result of shut-in time lookup unit 146a).
And when load condition is transferred to from light condition to heavy condition, the second multiplexer 145a is received more than first by triggering
The underloading that work device 144a is transmitted turns heavily loaded opening time value, and (specifically i.e. the first multiplexer 144a is that selection receives at this moment
And send out underloading and turn heavily loaded opening time value), and underloading is turned into heavily loaded opening time value and is sent to control module 13a, meanwhile,
4th multiplexer 148a is received the underloading that third multiplexer 147a is transmitted by triggering and turns heavily loaded shut-in time value, and underloading is turned
Heavily loaded shut-in time value is sent to control module 13a so that control module 13a can turn according to underloading heavily loaded opening time value with it is light
Idling heavy duty shut-in time value adjustment control responsibility cycle.
In addition, when load condition is transferred to from heavy condition to light condition, the second multiplexer 145a is received the by triggering
The heavy duty that one multiplexer 144a is transmitted turns underloading opening time value, and heavy duty is turned underloading opening time value and is sent to control mould
Block 13a, the 4th multiplexer 148a are received the heavy duty that third multiplexer 147a is transmitted by triggering and turn underloading shut-in time value, and will
Heavy duty turns underloading shut-in time value and is sent to control module 13a so that control module 13a can turn the underloading opening time according to heavy duty
Value turns underloading shut-in time value adjustment control responsibility cycle with heavy duty.
Similarly, control module 13a can be equipped with time variable table of comparisons 131a, and this time parameter table of comparisons 131a can be i.e.
When feedback output voltage, historical feedback average voltage, voltage differences value, above-mentioned underloading turn heavily loaded opening time value, above-mentioned underloading
Turn heavily loaded shut-in time value, above-mentioned heavy duty turns underloading opening time value, above-mentioned heavy duty turns underloading shut-in time value and a time
The correspondence of variable value, but it is without being limited thereto in other embodiment, and time variable value can be the value or a fixed number of multiple
Value, if fixed numbers, is generally up to 95%, minimum 5%, chats hereby bright.And control module 13a can equally lead to
The underloading crossed above-mentioned time variable table of comparisons 131a and received turns heavily loaded opening time value and is lightly loaded to turn heavily loaded shut-in time value,
Or heavy duty turns underloading opening time value and turns underloading shut-in time value with heavy duty, and control is reduced come fast lifting or quickly by operation
Responsibility cycle processed (operation mode is repeated no more with above-mentioned preferred embodiment).
In summary, after the circuit converter control system used, due to can in response to different operation modes and again
Programming, thus be not required to again it is time-consuming re-start circuit design, also due to the difference using average value and immediate feedback value judges, because
And can effectively according to heavy duty with underloading it is different at any time adjustment responsibility cycles size, and then can effectively avoid circuit converter produce
The problem of raw overshoot and load reduction.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (5)
1. a kind of circuit converter control system, is electrically connected at a circuit converter, which is characterized in that the circuit converter
Including an input stage circuit, a load switch and an output-stage circuit, the load switch are electrically connected at the input stage
Circuit, the output-stage circuit are electrically connected at the input stage circuit, and the circuit converter control system includes：
One analog-digital converter is electrically connected at an output end of the output-stage circuit, to by the output end in phase
Exported between different time is that a different time feedbacking output voltage of analog signal is converted to the different time of digital signal
Feedback output voltage, and be that an immediate feedback output voltage of analog signal is converted to number to be exported the output end
The immediate feedback output voltage of word signal；
One filter is electrically connected at the analog-digital converter, to according to anti-for the different time of digital signal
Feedback output voltage samples out a historical feedback average voltage；And
One control module is electrically connected at the analog-digital converter, the filter and the load switch, is equipped with an electricity
Pressure gate threshold value, exported receiving the output end be digital signal the immediate feedback output voltage, and to according to
A load condition of the circuit converter is detected according to the historical feedback average voltage；The control module is according to described in
Immediate feedback output voltage obtains a voltage differences value with the historical feedback average voltage；
Wherein, the control module controls the load switch with a control responsibility cycle, and institute is detected in the control module
It states load condition to be transferred to from a light condition when reaching the voltage threshold value to a heavy condition and the voltage differences value, increase
The control responsibility cycle is to control the load switch；Detect the load condition from the heavy duty in the control module
State is transferred to when reaching the voltage threshold value to the light condition and the voltage differences value, reduces the control responsibility cycle
To control the load switch；
The circuit converter control system also include one can program processing module, it is described can program processing module include：
One opening time lookup unit, is electrically connected at the analog-digital converter and the control module, is equipped with described
When feedback output voltage and an opening time one first mapping table, to according to be digital signal the immediate feedback
Output voltage obtains the corresponding opening time, and the one first of opening time signal of tabling look-up will be represented by, which using, is sent to
The control module；And
One shut-in time lookup unit, is electrically connected at the filter and the control module, and it is flat to be equipped with the historical feedback
One second mapping table of equal voltage and a shut-in time, to corresponding to being obtained according to the historical feedback average voltage
The shut-in time, the one second of shut-in time signal of tabling look-up will be represented by, which using, is sent to the control module；
Wherein, the control module tables look-up with described second that adjust the control responsibility all for signal according to the described first signal of tabling look-up
Phase；
A time variable table of comparisons is equipped in the control module, the time variable table of comparisons is exported with the immediate feedback
Voltage, the different time feedbacking output voltage, the voltage differences value, the opening time, the shut-in time and a period of time
Between variable value correspondence, use receive described first table look-up signal with described second table look-up signal when, according to described in
The control of the time variable table of comparisons adjusts the control responsibility cycle.
2. circuit converter control system according to claim 1, which is characterized in that the circuit converter control system
Include also a drive module, the control module and the load switch is electrically connected at, to according to the control module pair
The control of the load switch drives the load switch.
3. circuit converter control system according to claim 1, which is characterized in that the circuit converter is a flyback
Formula converter.
4. a kind of circuit converter control system, is electrically connected at a circuit converter, which is characterized in that the circuit converter
Including an input stage circuit, a load switch and an output-stage circuit, the load switch are electrically connected at the input stage
Circuit, the output-stage circuit are electrically connected at the input stage circuit, and the circuit converter control system includes：
One analog-digital converter is electrically connected at an output end of the output-stage circuit, to by the output end in phase
Exported between different time is that a different time feedbacking output voltage of analog signal is converted to the different time of digital signal
Feedback output voltage, and be that an immediate feedback output voltage of analog signal is converted to number to be exported the output end
The immediate feedback output voltage of word signal；
One filter is electrically connected at the analog-digital converter, to according to anti-for the different time of digital signal
Feedback output voltage samples out a historical feedback average voltage；And
One control module is electrically connected at the analog-digital converter, the filter and the load switch, is equipped with an electricity
Pressure gate threshold value, exported receiving the output end be digital signal the immediate feedback output voltage, and to according to
A load condition of the circuit converter is detected according to the historical feedback average voltage；The control module is according to described in
Immediate feedback output voltage obtains a voltage differences value with the historical feedback average voltage；
Wherein, the control module controls the load switch with a control responsibility cycle, and institute is detected in the control module
It states load condition to be transferred to from a light condition when reaching the voltage threshold value to a heavy condition and the voltage differences value, increase
The control responsibility cycle is to control the load switch；Detect the load condition from the heavy duty in the control module
State is transferred to when reaching the voltage threshold value to the light condition and the voltage differences value, reduces the control responsibility cycle
To control the load switch；
The circuit converter control system include one can program processing module, it is described can program processing module include：
One range multiplier is electrically connected at the analog-digital converter, is equipped with a multiplying power preset value, and will be digital signal
The immediate feedback output voltage and the multiplying power preset value carry out operation, use and generate a multiplying power operation values；
One first multiplexer turns heavily loaded opening time value and a weight selectively to receive a underloading according to the load condition
Idling is lightly loaded one in opening time value；And
One second multiplexer is electrically connected at the range multiplier, first multiplexer and the control module, to described
When load condition is transferred to from the light condition to the heavy condition, the institute that first multiplexer is transmitted is received by triggering
It states underloading and turns heavily loaded opening time value, and the underloading is turned into heavily loaded opening time value and is sent to the control module；Described
Two multiplexers and to when the load condition is transferred to from the heavy condition to the light condition, received by triggering described in
The heavy duty that first multiplexer is transmitted turns underloading opening time value, and the heavy duty is turned underloading opening time value and is sent to
The control module；
Wherein, it is to be maintained at the heavy condition and one of the light condition is worked as without being converted into the load condition
When another one, second multiplexer maintains to export the multiplying power operation values.
5. circuit converter control system according to claim 4, which is characterized in that it is described can program processing module packet
Contain：
One shut-in time lookup unit, is electrically connected at filter, is equipped with the one of historical feedback average voltage and a shut-in time
Mapping table, the corresponding shut-in time is obtained and sent out according to the historical feedback average voltage；
One third multiplexer turns heavily loaded shut-in time value and a weight selectively to receive a underloading according to the load condition
Idling is lightly loaded one in shut-in time value；And
One the 4th multiplexer is electrically connected at the shut-in time lookup unit, the third multiplexer and the control module,
When the load condition is transferred to from the light condition to the heavy condition, the third multiplexer is received by triggering
The underloading transmitted turns heavily loaded shut-in time value, and the underloading is turned heavily loaded shut-in time value and is sent to the control mould
Block；4th multiplexer and to when the load condition is transferred to from the heavy condition to the light condition, by touching
When sending out the heavy duty that the reception third multiplexer is transmitted and turn underloading shut-in time value, and the heavily loaded turn of underloading being closed
Between value be sent to the control module；
Wherein, it is to be maintained at the heavy condition and one of the light condition is worked as without being converted into the load condition
When another one, the 4th multiplexer maintains to export the shut-in time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510624899.9A CN106559002B (en) | 2015-09-28 | 2015-09-28 | Circuit converter control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510624899.9A CN106559002B (en) | 2015-09-28 | 2015-09-28 | Circuit converter control system |
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| CN106559002B true CN106559002B (en) | 2018-10-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108631594B (en) * | 2017-10-19 | 2020-03-06 | 西安矽力杰半导体技术有限公司 | Isolated converter and control circuit and control method thereof |
| TWI697751B (en) | 2019-05-22 | 2020-07-01 | 群光電能科技股份有限公司 | Voltage compensation circuit and voltage compensation method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8976543B1 (en) * | 2011-03-15 | 2015-03-10 | Lockheed Martin Corporation | Full bridge power supply with digital feedback |
| CN104852584A (en) * | 2011-02-16 | 2015-08-19 | 日隆电子股份有限公司 | Pulse width modulation controller and method used for reducing output ripples |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7554310B2 (en) * | 2005-03-18 | 2009-06-30 | Power-One, Inc. | Digital double-loop output voltage regulation |
| US7417879B2 (en) * | 2006-03-08 | 2008-08-26 | Micrel, Inc. | PFM and current controlled switching regulator |
| TWI548193B (en) * | 2012-05-11 | 2016-09-01 | 緯創資通股份有限公司 | Power saving method and related power saving circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104852584A (en) * | 2011-02-16 | 2015-08-19 | 日隆电子股份有限公司 | Pulse width modulation controller and method used for reducing output ripples |
| US8976543B1 (en) * | 2011-03-15 | 2015-03-10 | Lockheed Martin Corporation | Full bridge power supply with digital feedback |
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