CN102751889A - Power supply device - Google Patents
Power supply device Download PDFInfo
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- CN102751889A CN102751889A CN2011100980364A CN201110098036A CN102751889A CN 102751889 A CN102751889 A CN 102751889A CN 2011100980364 A CN2011100980364 A CN 2011100980364A CN 201110098036 A CN201110098036 A CN 201110098036A CN 102751889 A CN102751889 A CN 102751889A
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- control circuit
- feedback control
- supply module
- feedback
- voltage
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Abstract
The invention discloses a power supply device which comprises a power supply module and a feedback controller. The feedback controller is used for controlling the power supply module to output preset voltage and comprises first feedback control circuit and a second feedback circuit. After being connected in series, the first feedback control circuit and the second feedback control circuit are connected to the two opposite ends of the power supply module to sample the output voltage of the power supply module and to adjust the output voltage of the power supply module according to the difference between the sampled output voltage of the power supply module and the reference voltage of the feedback controller so as to enable the power supply module to output preset voltage.
Description
Technical field
The present invention relates to a kind of supply unit, relate in particular to a kind of exchange type power device.
Background technology
The feedback control circuit that existing exchange type power device generally includes supply module and regulates the supply module output voltage.Said feedback control circuit is connected to the output of supply module; Voltage in order to this friendship supply module output of sampling; And the voltage of the relatively actual output of this supply module and the difference of reference voltage; Voltage with according to this difference adjustment supply module output makes the voltage of exchange type power device output reach preset voltage.Yet; Existing feedback control circuit at most also only has 2 zero points and 3 limits usually, and phase place at most only can be promoted to the 90-180 degree, and has only a limit at extremely low frequency; Can't DC current gain up be improved again; Sometimes maybe be for fear of zero, the used number of limit, make the high-frequency noise of this feedback control circuit suppress ability or frequency range good inadequately, so will be difficult to compensate the exchange type power device influences this exchange type power to the response requirement of some CF performance.
Summary of the invention
In view of above content, be necessary the supply unit that provides a kind of performance preferable.
A kind of supply unit; Comprise supply module and feedback controller; The voltage that said feedback controller is preset in order to control supply module output one; And said feedback controller comprises first feedback control circuit and second feedback control circuit, and said first feedback control circuit is connected in the opposite end of supply module after second feedback control circuit is in series, in order to the voltage of the supply module output of will sampling; And regulate the voltage of supply module output according to the voltage of supply module output and the difference of the reference voltage of said feedback controller, so that the voltage that supply module output is preset.
Above-mentioned supply unit adopts the voltage of feedback controller control supply module output; And more zero, limit is provided through first feedback control circuit that is in series and second feedback control circuit; Can be through configuration zero to this, limit; Make this feedback controller obtain better frequency range, gain, phase place hoisting power and high-frequency suppressing ability, improve the performance of this formula supply unit.
Description of drawings
Fig. 1 is the theory diagram of the supply unit of preferred embodiments of the present invention.
Fig. 2 is the circuit theory diagrams of the feedback controller of supply unit shown in Figure 1.
Fig. 3 is the gain curve figure of feedback controller shown in Figure 2 and the gain curve figure of existing reaction type controller.
Fig. 4 is the phase curve figure of feedback controller shown in Figure 2 and the phase curve figure of existing reaction type controller.
The main element symbol description
| |
100 |
| |
10 |
| The pulse |
11 |
| |
12 |
| |
13 |
| The |
14 |
| |
30 |
| First |
31 |
| Second |
33 |
| Arithmetic and control unit | E/A、E/A' |
| Resistance | R1、Rc、Rfb、R1'、Rc'、Rfb' |
| Electric capacity | C1、C2、Cc、C1'、C2'、Cc' |
| |
90 |
Following embodiment will combine above-mentioned accompanying drawing to further specify the present invention.
Embodiment
Please refer to Fig. 1 and Fig. 2; The supply unit 100 of preferred embodiments of the present invention is an exchange type power device; In order to load 90 power supplies to being connected to this supply unit 100; It comprises supply module 10 and feedback controller 30, and said feedback controller 30 is connected in the opposite end of supply module 10, in order to the voltage of sampling supply module 10 outputs; And calculate the difference of the voltage of this output and the reference voltage of feedback controller 30 (being the Ref shown in Fig. 2), make the voltage of supply module 10 outputs reach preset voltage with voltage according to these difference adjustment supply module 10 outputs.In embodiment of the present invention; Said feedback controller 30 is a tandem feedback controller; It comprises first feedback control circuit 31 and second feedback control circuit 33 of mutual series connection; First feedback control circuit 31 and second feedback control circuit 33 to be in series through this make this feedback controller 30 have more zero, limit; And can reach 4 zero points and 6 limits at most,, make exchange type power device 100 gain higher and the more accurate voltage of output in low frequency part with through making this feedback controller 30 can compensate the response requirement of exchange type power device 100 to some CF to these a plurality of configurations zero, limit; Lower and effective inhibitions of HFS gain mixed and believed, can make the performance of this exchange type power device 100 better.
Said first feedback control circuit 31 is an existing feedback control circuit, comprises arithmetic and control unit E/A, resistance R 1, Rc, Rfb, capacitor C 1, C2 and Cc.Said arithmetic and control unit E/A is an error amplifier, and its reverse input end is connected to the output of LC filter circuit 14 through resistance R _ f b, and positive input is connected to reference voltage, and output is connected to second feedback control circuit 33.Said resistance R 1 is connected in parallel to resistance R _ f b after being in series with capacitor C 1.Be connected in parallel to capacitor C 2 again after said resistance R c and capacitor C c are in series, and then be connected to together between the reverse input end and output of arithmetic and control unit E/A.
Said second feedback control circuit 33 is similar with first feedback control circuit 31, and its difference only is that the capacitance of resistance value and electric capacity of each resistance is inequality, and it comprises arithmetic and control unit E/A', resistance R 1', Rc', Rfb', capacitor C 1', C2' and Cc'.The reverse input end of said arithmetic and control unit E/A' is connected to the output of first feedback control circuit 31 through resistance R _ f b'; Positive input is connected to reference voltage; Output is connected to pulse width modulation chip 11; In order to the duty ratio of the control signal of regulating impulse width modulated chip 11 output, with the voltage of these supply module 10 outputs of corresponding adjusting.
In embodiment of the present invention, the transfer function of said first feedback control circuit 31 is:
| G1 (S) |=
; It is thus clear that this first feedback control circuit 31 has 2 zero points, 3 limits.
Said second feedback control circuit 33 is similar with first feedback control circuit 31, and its feedback function is:
| G2 (S) |=
; It is thus clear that second feedback control circuit 33 also has 2 zero points, 3 limits.
Therefore, the be in series transfer function of the feedback controller 30 that constitutes of this first feedback control circuit 31 and second feedback control circuit 33 is:
｜G（S）｜=｜G1（S）｜*｜G2（S）｜=
*
That is, this feedback controller 30 has 4 zero points, 6 limits.
First feedback control circuit 31 and the voltage of second feedback control circuit 33 comparison supply modules 10 outputs and the difference of reference voltage that this feedback controller 30 be provided with of this feedback controller 30 through being in series; To regulate the voltage of supply module 10 outputs according to the corresponding trigger pulse width modulation chip 11 of this difference, the voltage of exporting until supply module 10 reaches preset voltage.In addition; Be in series through first feedback control circuit 31 and second feedback control circuit 33; Make this feedback controller 30 have 4 zero points, 6 limits; Can will this a plurality of zero points, limit fully is disposed at gain or phase place weak point in this exchange type power device 100, the characteristic (changing the slope that gain descends zero point through increasing, its phase place of increase limit increase) through zero point and limit is to improve the performance of this exchange type power device 100.
Specifically please consult gain curve figure shown in Figure 3 and phase curve figure shown in Figure 4 in the lump; Wherein curve A and curve C are respectively the gain curve figure and the phase curve figure of existing feedback controller, and curve B and curve D are respectively the gain curve figure and the phase curve figure of feedback controller 30 of the present invention.Existing feedback controller at most only has 2 zero points and 3 limits usually, and its gain curve (ginseng curve A) all descends with the slope of-20dB/dec at low frequency part and HFS; And feedback controller 30 of the present invention has 4 zero points and 6 limits; Therefore; Can increase a zero point respectively at low frequency and HFS respectively; Gain curve (ginseng curve B) is all descended with the slope of-40dB/dec at low frequency and HFS, make serial Feedback controller 30 of the present invention have higher gain in low frequency part, the voltage that makes supply module 10 outputs is more near preset voltage, more accurate; Gain at HFS is lower, effectively suppresses assorted letter.In addition, can increase limit at low frequency or HFS, to increase phase place; The corresponding frequency range that increases; Visible from Fig. 3, the frequency range of the existing feedback controller shown in the curve A is 5.79MHz, and the frequency range of the feedback controller of the present invention 30 shown in the curve B is 16.87MHz.The phase place of the existing feedback controller shown in the curve C at most only can be promoted to 180 degree, and the phase place of the present invention's shown in the curve D feedback controller 30 can be promoted to the 180-270 degree.Therefore; Feedback controller 30 of the present invention has more zero, limit; And through configuration zero to this, limit; Make the existing feedback controller of this feedback controller have that phase place promotes, frequency range strengthens, DC current gain increases and high-frequency noise suppresses advantages such as ability is better, can compensate the exchange type power device accordingly to the response requirement of some CF but the exchange type power device has preferable performance.
Claims (8)
1. supply unit; Comprise supply module; It is characterized in that: this supply unit also comprises a feedback controller, the voltage that said feedback controller is preset in order to control supply module output one, and said feedback controller comprises first feedback control circuit and second feedback control circuit; Said first feedback control circuit is connected in the opposite end of supply module after second feedback control circuit is in series; In order to the voltage of the supply module output of will sampling, and regulate the voltage of supply module output, so that the voltage that supply module output is preset according to the voltage of supply module output and the difference of the reference voltage of said feedback controller.
2. supply unit as claimed in claim 1; It is characterized in that: said first feedback control circuit and second feedback control circuit include arithmetic and control unit; The reverse input end of the arithmetic and control unit of first feedback control circuit is connected to the output of supply module; Positive input is connected to reference voltage, and output is connected to the reverse input end of the arithmetic and control unit of second feedback control circuit; The positive input of the arithmetic and control unit of second feedback control circuit is connected to reference voltage, and output is connected to the input of supply module.
3. supply unit as claimed in claim 2 is characterized in that: said first feedback control circuit also comprises some resistance and electric capacity, makes this first feedback control circuit have 2 zero points, 3 limits.
4. supply unit as claimed in claim 3 is characterized in that: the said second feedback control circuit also comprises some resistance and electric capacity, makes this second feedback control circuit have 2 zero points, 3 limits.
5. supply unit as claimed in claim 4; It is characterized in that: have 4 zero points by first feedback control circuit and second feedback control circuit feedback controller that forms that is in series; And the gain that makes this feedback control circuit through the distributed and arranged to this zero point descends at the slope of low frequency part with-40dB/dec, also descends with the slope of-40dB/dec at HFS.
6. supply unit as claimed in claim 4; It is characterized in that: have 6 limits by first feedback control circuit and second feedback control circuit feedback controller that forms that is in series; Through distributed and arranged to this limit; The frequency range of this feedback control circuit is increased, and phase place is increased to the 180-270 degree.
7. supply unit as claimed in claim 2: the arithmetic and control unit of the arithmetic and control unit of said first feedback control circuit and second feedback control circuit is error amplifier.
8. supply unit as claimed in claim 2; It is characterized in that: supply module comprises the pulse width modulation chip; The output of second feedback control circuit is connected to the pulse width modulation chip, and regulates the voltage of supply module output through control impuls width modulated chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100980364A CN102751889A (en) | 2011-04-19 | 2011-04-19 | Power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100980364A CN102751889A (en) | 2011-04-19 | 2011-04-19 | Power supply device |
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|---|---|
| CN102751889A true CN102751889A (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100980364A Pending CN102751889A (en) | 2011-04-19 | 2011-04-19 | Power supply device |
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| Country | Link |
|---|---|
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87213624U (en) * | 1987-09-19 | 1988-07-20 | 中国科学院广州电子技术研究所 | High voltage continually adjustable electric resource |
| US5583752A (en) * | 1993-07-29 | 1996-12-10 | Murata Manufacturing Co., Ltd. | Switching power supply for generating a voltage in accordance with an instruction signal |
| TW200828753A (en) * | 2006-12-21 | 2008-07-01 | Grand Apex Internat Inc | DC-to-DC power source converting system |
| US20080291703A1 (en) * | 2007-05-22 | 2008-11-27 | Samsung Electronics Co., Ltd. | Signal converting apparatus and signal conversion method |
| CN201466792U (en) * | 2009-07-13 | 2010-05-12 | 长沙高新开发区星联电力自动化技术有限公司 | Remote-cut cutoff device |
-
2011
- 2011-04-19 CN CN2011100980364A patent/CN102751889A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87213624U (en) * | 1987-09-19 | 1988-07-20 | 中国科学院广州电子技术研究所 | High voltage continually adjustable electric resource |
| US5583752A (en) * | 1993-07-29 | 1996-12-10 | Murata Manufacturing Co., Ltd. | Switching power supply for generating a voltage in accordance with an instruction signal |
| TW200828753A (en) * | 2006-12-21 | 2008-07-01 | Grand Apex Internat Inc | DC-to-DC power source converting system |
| US20080291703A1 (en) * | 2007-05-22 | 2008-11-27 | Samsung Electronics Co., Ltd. | Signal converting apparatus and signal conversion method |
| CN201466792U (en) * | 2009-07-13 | 2010-05-12 | 长沙高新开发区星联电力自动化技术有限公司 | Remote-cut cutoff device |
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Application publication date: 20121024 |