CN102570827A - Power system - Google Patents
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- CN102570827A CN102570827A CN2011104302079A CN201110430207A CN102570827A CN 102570827 A CN102570827 A CN 102570827A CN 2011104302079 A CN2011104302079 A CN 2011104302079A CN 201110430207 A CN201110430207 A CN 201110430207A CN 102570827 A CN102570827 A CN 102570827A
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Abstract
The invention relates to a power system, which comprises a transformer, a first rectification unit, a first capacitor, an energy storage unit, a feedback unit and a pulse width modulation unit, wherein the transformer is provided with a first winding and a second winding; the first rectification unit is electrically connected to one end of the second winding; the first capacitor is coupled with the first rectification unit; the energy storage unit is coupled with the secondary side of the transformer, and is provided with a voltage output end for providing voltage for a load; the feedback unit is electrically connected to the output end of the first capacitor, and is used for generating a feedback signal; the pulse width modulation unit is connected in series with the first winding, and is used for controlling the input voltage to flow through the first winding according to the feedback signal, restricting the input voltage to enter the first winding when the voltage output end is under first preset voltage, and making the input voltage enter the first winding to energize a second capacitor according to the feedback signal when the voltage output end is under second preset voltage; and a value of the first preset voltage is greater than that of the second preset voltage. By the power system, power efficiency can be remarkably improved.
Description
Technical field
The present invention refers to a kind of power-supply system of tool electricity-saving mechanism especially relevant for a kind of power-supply system.
Background technology
Flyback power-supply system (Flyback Power System) is by widely in order to the power supply change-over device as various electronic products.Please refer to Fig. 1, Fig. 1 is the electrical block diagram of convention flyback power-supply system 100.Power-supply system 100 has input voltage vin.Transformer 120 comprises elementary winding 122, secondary winding 126 and auxiliary winding 124, and wherein elementary winding 122 is in order to receive input voltage vin.Current rectifying and wave filtering circuit 150 is used for that the preposition output voltage of secondary winding 126 inductions is carried out rectifying and wave-filtering and handles, to produce output voltage V o.Output voltage V o can handle via the signal of feedback circuit 140, feedbacks to ON-OFF control circuit 130 to produce feedback signal Sfb.ON-OFF control circuit 130 produces the conduction and cut-off state of controlling signal Sc with control switch 132 according to feedback signal Sfb; And then control flows is through the electric current of elementary winding 122; Therefore, in the running of flyback power-supply system 100, the conduction and cut-off state switching of switch 132 can cause energy loss.
Summary of the invention
Because the shortcoming of prior art; Can be when the present invention proposes a kind of power-supply system standby by decapacitation PWM unit periodically to reduce energy dissipation; Or when getting into power-saving working mode; Only provide the continuous action load required low burning voltage, so, can significantly improve power-efficient compared to prior art.
For realizing above-mentioned purpose, the present invention provides a kind of power-supply system, is applied to electronic installation under power down mode, and this power-supply system comprises:
Transformer, this transformer have first winding and second winding, and this first winding is arranged at the primary side of this transformer to receive input voltage, and this second winding is arranged at the secondary side of this transformer;
First rectification unit is electrically connected on an end of this second winding;
First electric capacity is coupled to this first rectification unit;
Energy-storage units is coupled to the secondary side of this transformer, has voltage output end, in order to provide voltage to load;
Feedback the unit, be electrically connected on the output of this first electric capacity, and produce feedback signal according to the voltage of this first electric capacity output; And
The PWM unit is connected in series with this first winding, according to this feedback signal in order to control this input voltage this first winding of flowing through;
Wherein, when this voltage output end during in first predetermined voltage, this PWM unit limits this input voltage and gets into this first winding; When this voltage output end during in second predetermined voltage, this PWM unit makes this input voltage get into that this first winding fills according to this feedback signal can this energy-storage units;
Wherein, this first scheduled voltage is greater than this second scheduled voltage.
Preferably, this energy-storage units comprises second rectification unit and second electric capacity, and this second rectification unit is electrically connected on an end of this second winding, and this second electric capacity is coupled to this second rectification unit, and this second electric capacity provides voltage to this voltage output end.
Preferably, when this voltage output end during in first predetermined voltage, this PWM unit limits this input voltage and gets into this first winding in first scheduled time, make this first predetermined voltage drop to this second predetermined voltage.
Preferably, this first scheduled time is according to the load condition decision of this second electric capacity and this electronic installation.
Preferably, when this voltage output end during in second predetermined voltage, this PWM unit makes this input voltage get into that this first winding fills in second scheduled time can this second electric capacity, makes this second predetermined voltage rise to this first predetermined voltage.
Preferably, this power-supply system more comprises detecting unit, couples this PWM unit and this voltage output end, in order to detect the voltage of this voltage output end.
Preferably, this first winding has first end and second end, and first end of this first winding is electrically connected on this input voltage, and first end of this first winding, second end be coupled to this PWM unit, and this power-supply system more comprises:
Switch comprises control end, first end and second end, and wherein first end of this switch is coupled to first end of this first winding, and second end of this switch is coupled to earth terminal; And
First coupling unit; One side of this first coupling unit is coupled between the control end and this earth terminal of this switch, and the opposite side of this first coupling unit couples this detecting unit, wherein; When this voltage output end during in this first predetermined voltage, this first coupling unit of this detecting unit activation.
Preferably; First end of this first winding, second end are respectively coupled to first, second contact of this PWM unit; This power-supply system more comprises second coupling unit, and a side of this second coupling unit is coupled between first contact and this earth terminal of this PWM unit, and the opposite side of this second coupling unit couples this detecting unit; Wherein, When this voltage output end during, this detecting unit decapacitation this this first coupling unit in this second predetermined voltage, and this second coupling unit of activation temporarily.
Preferably, the control end of this switch is coupled to this input voltage.
Preferably; This power-supply system more comprises the switching circuit unit; This switching circuit unit is coupled between this first electric capacity and this energy-storage units; Wherein the output of this first electric capacity couples the input of this energy-storage units, when this voltage output end when the output end voltage of second predetermined voltage and this first electric capacity does not reach the 3rd predetermined voltage, this switching circuit unit open; When this voltage output end when the output end voltage of second predetermined voltage and first electric capacity reaches the 3rd predetermined voltage, this switching circuit cell conduction; The 3rd predetermined voltage is for driving the voltage of this switching circuit unit.
The invention has the beneficial effects as follows: can be during power-supply system standby of the present invention by decapacitation PWM unit periodically to reduce energy dissipation; Or when getting into power-saving working mode; Only provide the continuous action load required low burning voltage; So, can significantly improve power-efficient compared to prior art.
For making those skilled in the art further understanding and approval arranged for structure, purpose and the effect of power-supply system of the present invention, cooperate diagram to specify now as after.
Description of drawings
Fig. 1 is the electrical block diagram of convention flyback power-supply system;
Fig. 2 A is the electrical block diagram of the power-supply system of first embodiment of the invention;
Fig. 2 B is the electrical block diagram of the power-supply system of another embodiment of the present invention;
Fig. 3 is the electrical block diagram of the power-supply system of second embodiment of the invention;
Fig. 4 is the electrical block diagram of the power-supply system of third embodiment of the invention.
Embodiment
For making the present invention more apparent and understandable, hereinafter is according to power-supply system of the present invention, and the special embodiment that lifts cooperates appended graphic elaborating, but the embodiment that is provided not is in order to limit scope of patent protection of the present invention.
Please refer to Fig. 2 A; Fig. 2 A is the electrical block diagram of the power-supply system 200 of first embodiment of the invention, and power-supply system 200 comprises transformer T1, rectification filtering unit 241, energy-storage units 242, PWM unit 210, back coupling unit 220, detecting unit 230, coupling unit PH1, PH2 and switch Q1.Transformer T1 comprises the first winding N1 and the second winding N2, and the first winding N1 is arranged on primary side and the second winding N2 is arranged on secondary side, and the end of the first winding N1 connects voltage input end Vin ', and the other end couples PWM unit 210 to earth terminal.Rectification filtering unit 241 comprises the first rectification unit D1, first capacitor C 1 and is electrically connected between the second winding N2 and the reference potential.Energy-storage units 242 comprises the second rectification unit D2, second capacitor C 2 and is electrically connected between the second winding N2 and the reference potential; Wherein but first capacitor C 1 and second capacitor C 2 have voltage output end Vo1 and Vo2 offered load respectively, and wherein electronic installation is carried on that voltage output end is respectively Vo1 and Vo2 under operate as normal or the standby/battery saving mode.In another embodiment, like Fig. 2 B, the output of the output of first capacitor C 1 and second capacitor C 2 sees through diode D3 and is connected generation voltage output end Vo1, and wherein electronic installation is carried on that voltage output end is Vo1 under operate as normal or the standby/battery saving mode.Detecting unit 230 is coupled to the output of energy-storage units 242 in order to detect the voltage of this voltage output end, and the other end of detecting unit 230 couples coupling unit PH1 and PH2.Switch Q1 is metal-oxide half field effect transistor (MOSFET), but unrestricted, can also replace the grid of switch Q1 (Gate) and corresponding respectively coupling unit PH1 and the earth terminal of coupling of source electrode (Source) by other switch elements.PWM unit 210 has control end 214, and wherein the drain electrode (Drain) of control end 214, switch Q1 is electrically connected to node A1 jointly with voltage input end Vin '.Back coupling unit 220 is coupled to the output of this first capacitor C 1, in order to produce feedback signal Sfb to PWM unit 210.
Start explanation in detail; When electronic installation was got into standby/battery saving mode by normal mode of operation, this moment, detecting unit 230 can receive standby/battery saving mode signal SS, the output end voltage (node A2) that detecting unit 230 can detecting energy-storage units 242; If node A2 voltage is the first predetermined voltage Vmax; The control end 232 of detecting unit 230 can send high levels signal activation coupling unit PH1, and this moment, the grid (Gate) of switch Q1 saw through coupling unit PH1 to earth terminal, and voltage input end Vin ' gets into the control end 214 of PWM unit 210 via node A1; In one embodiment of the invention but unrestricted condition; Control end 214 utilizes the overvoltage protection port (Over Voltage Protection Pin) of PWM unit 210, and when control end 214 was received high levels signal (Vin '), PWM unit 210 produced controlling signal SC positive closing switch Q2; Deboost input Vin ' gets into the first winding N1, and this moment, the load terminal voltage of electronic installation was supplied by energy-storage units 242.Switch Q2 temporarily stops to switch; Drop to the second predetermined voltage Vmax up to detecting unit 230 detecting node A2 voltages; Energy-storage units 242 energy stored are not enough to supply load use under standby/battery saving mode; The control end 234 of detecting unit 230 can send replacement signal Sre reset voltage protection port and make that switch Q2 can be according to feedbacking signal Sfb switching at this moment, and on the other hand, the control end 232 of detecting unit 230 sends low level signal decapacitation coupling unit PH1 simultaneously; The grid (Gate) of switch Q1 sees through and is coupled to voltage input end Vin and conducting at this moment; Switch Q2 switches according to the back coupling signal Sfb of back coupling unit 220 generations, feedbacks signal Sfb output generation according to first capacitor C 1, makes voltage input end Vin ' entering transformer T1 fill ability energy-storage units 242 to first predetermined voltage Vmax.
In practical situations, second capacitor C, 2 stored energy capacitances are greater than first capacitor C, 1, the second capacitor C, 2 about 1～10F, first capacitor C, 1 about 1～10 μ F, and the non-absolute limitations of numerical value, the designer can design second capacitor C 2 and first capacitor C, 1 size voluntarily according to its demand.
In addition; Be electrically connected partial pressure unit R1, R2 between the grid of switch Q1 (Gate) and voltage input end Vin; Its purpose is after electronic installation is connected with the mains, to make switch Q1 conducting, and voltage input end Vin ' sees through switch Q1 bypass to earth terminal, guarantees that power supply can operate as normal after connecting.Input voltage vin sees through the elements T 2 of boosting and produces output voltage V in ', but the designer can not be provided with the elements T 2 of boosting according to demand.
Please refer to Fig. 3; Fig. 3 is the electrical block diagram of the power-supply system 300 of second embodiment of the invention, comprises transformer T1, rectification filtering unit 341, energy-storage units 342, switching circuit unit 350, PWM unit 310, back coupling unit 320, detecting unit 330, coupling unit PH1, PH2 and switch Q1 in power-supply system 300.Transformer T1 comprises the first winding N1 and the second winding N2, and the first winding N1 is arranged on primary side and the second winding N2 is arranged on secondary side, and the end of the first winding N1 connects voltage input end Vin ', and the other end couples PWM unit 310 to earth terminal.Rectification filtering unit 341 comprises the first rectification unit D1, first capacitor C 1 and is electrically connected between the second winding N2 and the reference potential.Energy-storage units 342 comprises second capacitor C 2 and but second capacitor C 2 has voltage output end Vo offered load.Switching circuit unit 350 is coupled between rectification filtering unit 341 and the energy-storage units 342.Detecting unit 330 is coupled to the output of energy-storage units 342 in order to detect the voltage of this voltage output end, and the other end of detecting unit 330 couples coupling unit PH1 and PH2.Switch Q1 is metal-oxide half field effect transistor (MOSFET), but unrestricted, can also replace the grid of switch Q1 (Gate) and corresponding respectively coupling unit PH1 and the earth terminal of coupling of source electrode (Source) by other switch elements.PWM unit 310 has control end 314, and wherein the drain electrode (Drain) of control end 314, switch Q1 is electrically connected to node A1 jointly with voltage input end Vin '.Back coupling unit 320 is coupled to the output of this first capacitor C 1, in order to produce feedback signal Sfb to PWM unit 210.
Start explanation in detail; When electronic installation was got into standby/battery saving mode by normal mode of operation, this moment, detecting unit 330 can receive standby/battery saving mode signal SS, the output end voltage (node A2) that detecting unit 330 can detecting energy-storage units 342; If node A2 voltage is the first predetermined voltage Vmax; The control end 332 of detecting unit 230 can send high levels signal activation coupling unit PH1, and this moment, the grid (Gate) of switch Q1 saw through coupling unit PH1 to earth terminal, and voltage input end Vin ' gets into the control end 314 of PWM unit 310 via node A1; In one embodiment of the invention but unrestricted condition; Control end 314 utilizes the overvoltage protection port (Over Voltage Protection Pin) of PWM unit 310, and when control end 314 was received high levels signal (Vin '), PWM unit 310 produced controlling signal SC positive closing switch Q2; Deboost input Vin ' gets into the first winding N1, and this moment, the load terminal voltage of electronic installation was supplied by energy-storage units 342.Switch Q2 temporarily stops to switch; Drop to the second predetermined voltage Vmax up to detecting unit 330 detecting node A2 voltages; Expression energy-storage units 342 energy stored are not enough to supply load use under standby/battery saving mode; The control end 334 of detecting unit 330 can send replacement signal Sre reset voltage protection port and make that switch Q2 can be according to feedbacking signal Sfb switching at this moment, and on the other hand, the control end 332 of detecting unit 330 sends low level signal decapacitation coupling unit PH1 simultaneously; The grid (Gate) of switch Q1 sees through and is coupled to voltage input end Vin and conducting at this moment; Switch Q2 switches according to the back coupling signal Sfb of back coupling unit 320 generations, feedbacks signal Sfb output generation according to first capacitor C 1, makes voltage input end Vin ' entering transformer T1 fill ability energy-storage units 342 to first predetermined voltage Vmax.Wherein switching circuit unit 350 is coupled between rectification filtering unit 341 and the energy-storage units 342; When the output end voltage that drops to the second predetermined voltage Vmax and first capacitor C 1 when node A2 voltage does not reach the 3rd predetermined voltage, switching circuit unit 350 open circuit (Q4:OFF; Q3:OFF), when the output end voltage of first capacitor C 1 reaches the 3rd predetermined voltage, this switching circuit conducting (Q4:ON; Q3:ON), in order to second capacitor C 2 is charged, so, it is stable to increase feedback signal.This tertiary voltage is for driving the voltage of this switching circuit unit 350.
Please refer to Fig. 4; Fig. 4 is the electrical block diagram of the power-supply system 400 of third embodiment of the invention, and present embodiment is the variation aspect of first embodiment, and element numbers fellow repeats no more; Difference is that control unit 430 do not detect second capacitor C, 2 output end voltages; And utilize when receiving standby/battery saving mode signal SS, periodically activation/decapacitation switch Q2 makes output end voltage Vo2 between the first predetermined voltage Vmax and the second predetermined voltage Vmax.
Further specify; When control unit 430 was received standby/battery saving mode signal SS, this moment, output end voltage Vo2 was the first predetermined voltage Vmax, and control unit 430 these PWM unit 410 of control limit this input voltage vin in first scheduled time ' get into this first winding N1; Because of the load of electronic installation under standby/battery saving mode still lossy; Make output end voltage Vo2 drop to the second predetermined voltage Vmax in the first predetermined voltage Vmax, wherein, because of the load condition of electronic installation under standby/battery saving mode can be known; And second capacitor C, 2 sizes are known, therefore can obtain first scheduled time size.Therefore; When receiving standby/battery saving mode signal SS after after first scheduled time; Can expect that Vo2 drops to the second predetermined voltage Vmax in the first predetermined voltage Vmax, at this moment, PWM unit 410 makes input voltage vin according to feedback signal Sfb ' getting into that this first winding N1 fills in second scheduled time can energy-storage units 441; Wherein because of the load of electronic installation under standby/battery saving mode, second capacitor C, 2 sizes and fill can electric current knownly with voltage, it be big or small therefore can to obtain for second scheduled time.In addition; Present embodiment also can be revised voltage output end such as Fig. 2 B; The output of first capacitor C 1 sees through diode D3 with the output of second capacitor C 2 and is connected generation voltage output end Vo1, or is coupled between rectification filtering unit 341 and the energy-storage units 342 like Fig. 3 switching circuit unit 350.
In sum; Can be during power-supply system standby of the present invention by decapacitation switch Q2 periodically reducing energy dissipation, or when getting into power-saving working mode, only provide the continuous action load required low burning voltage; So, can significantly improve power-efficient compared to prior art.
Though the present invention discloses as above with embodiment; Right its is not in order to limit the present invention; Those skilled in the art are not in breaking away from scope of patent protection of the present invention; Can do various changes and retouching, so protection scope of the present invention is as the criterion when the scope of patent protection that look accompanying Claim book institute circle.
Claims (10)
1. a power-supply system is applied to electronic installation under power down mode, it is characterized in that it comprises:
Transformer, this transformer have first winding and second winding, and this first winding is arranged at the primary side of this transformer to receive input voltage, and this second winding is arranged at the secondary side of this transformer;
First rectification unit is electrically connected on an end of this second winding;
First electric capacity is coupled to this first rectification unit;
Energy-storage units is coupled to the secondary side of this transformer, has voltage output end, in order to provide voltage to load;
Feedback the unit, be electrically connected on the output of this first electric capacity, and produce feedback signal according to the voltage of this first electric capacity output; And
The PWM unit is connected in series with this first winding, according to this feedback signal in order to control this input voltage this first winding of flowing through;
Wherein, when this voltage output end during in first predetermined voltage, this PWM unit limits this input voltage and gets into this first winding; When this voltage output end during in second predetermined voltage, this PWM unit makes this input voltage get into that this first winding fills according to this feedback signal can this energy-storage units;
Wherein, this first scheduled voltage is greater than this second scheduled voltage.
2. power-supply system as claimed in claim 1; It is characterized in that; This energy-storage units comprises second rectification unit and second electric capacity; This second rectification unit is electrically connected on an end of this second winding, and this second electric capacity is coupled to this second rectification unit, and this second electric capacity provides voltage to this voltage output end.
3. power-supply system as claimed in claim 2; It is characterized in that; When this voltage output end during in first predetermined voltage, this PWM unit limits this input voltage and gets into this first winding in first scheduled time, make this first predetermined voltage drop to this second predetermined voltage.
4. power-supply system as claimed in claim 3 is characterized in that, this first scheduled time is according to the load condition decision of this second electric capacity and this electronic installation.
5. power-supply system as claimed in claim 2; It is characterized in that; When this voltage output end during in second predetermined voltage; This PWM unit makes this this first winding of input voltage entering fill this second electric capacity of ability in second scheduled time, makes this second predetermined voltage rise to this first predetermined voltage.
6. power-supply system as claimed in claim 1 is characterized in that this power-supply system more comprises detecting unit, couples this PWM unit and this voltage output end, in order to detect the voltage of this voltage output end.
7. power-supply system as claimed in claim 6; It is characterized in that this first winding has first end and second end, first end of this first winding is electrically connected on this input voltage; And first end of this first winding, second end are coupled to this PWM unit, and this power-supply system more comprises:
Switch comprises control end, first end and second end, and wherein first end of this switch is coupled to first end of this first winding, and second end of this switch is coupled to earth terminal; And
First coupling unit; One side of this first coupling unit is coupled between the control end and this earth terminal of this switch, and the opposite side of this first coupling unit couples this detecting unit, wherein; When this voltage output end during in this first predetermined voltage, this first coupling unit of this detecting unit activation.
8. power-supply system as claimed in claim 7; It is characterized in that first end of this first winding, second end are respectively coupled to first, second contact of this PWM unit, this power-supply system more comprises second coupling unit; One side of this second coupling unit is coupled between first contact and this earth terminal of this PWM unit; The opposite side of this second coupling unit couples this detecting unit, wherein, and when this voltage output end during in this second predetermined voltage; This detecting unit decapacitation this this first coupling unit, and this second coupling unit of activation temporarily.
9. power-supply system as claimed in claim 7 is characterized in that the control end of this switch is coupled to this input voltage.
10. power-supply system as claimed in claim 1; It is characterized in that; This power-supply system more comprises the switching circuit unit, and this switching circuit unit is coupled between this first electric capacity and this energy-storage units, and wherein the output of this first electric capacity couples the input of this energy-storage units; When this voltage output end when the output end voltage of second predetermined voltage and this first electric capacity does not reach the 3rd predetermined voltage, this switching circuit unit open; When this voltage output end when the output end voltage of second predetermined voltage and first electric capacity reaches the 3rd predetermined voltage, this switching circuit cell conduction;
The 3rd predetermined voltage is for driving the voltage of this switching circuit unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110430207.9A CN102570827B (en) | 2011-12-20 | 2011-12-20 | Power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110430207.9A CN102570827B (en) | 2011-12-20 | 2011-12-20 | Power system |
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| Publication Number | Publication Date |
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| CN102570827A true CN102570827A (en) | 2012-07-11 |
| CN102570827B CN102570827B (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110430207.9A Expired - Fee Related CN102570827B (en) | 2011-12-20 | 2011-12-20 | Power system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104768793A (en) * | 2012-09-04 | 2015-07-08 | Abb技术有限公司 | Controlling a modular converter |
| CN110620423A (en) * | 2018-06-19 | 2019-12-27 | 台达电子工业股份有限公司 | Power supply circuit and UPS auxiliary power supply system with same |
| CN112803759A (en) * | 2019-11-13 | 2021-05-14 | 奇源科技有限公司 | Power supply conversion device |
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| JP2001274658A (en) * | 2000-03-27 | 2001-10-05 | Mitsumi Electric Co Ltd | Intermittent oscillation circuit and oscillation circuit |
| US20080298095A1 (en) * | 2007-05-29 | 2008-12-04 | Chao-Hsuan Chuang | Light-load efficiency improving method and apparatus for a flyback converter |
| CN101594057A (en) * | 2008-05-29 | 2009-12-02 | 电力集成公司 | Be used for realizing the method and apparatus of not adjusting park mode of power converter |
| US20100195355A1 (en) * | 2009-02-03 | 2010-08-05 | Iwatt Inc. | Switching power converter with load impedance detection |
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2011
- 2011-12-20 CN CN201110430207.9A patent/CN102570827B/en not_active Expired - Fee Related
Patent Citations (4)
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| JP2001274658A (en) * | 2000-03-27 | 2001-10-05 | Mitsumi Electric Co Ltd | Intermittent oscillation circuit and oscillation circuit |
| US20080298095A1 (en) * | 2007-05-29 | 2008-12-04 | Chao-Hsuan Chuang | Light-load efficiency improving method and apparatus for a flyback converter |
| CN101594057A (en) * | 2008-05-29 | 2009-12-02 | 电力集成公司 | Be used for realizing the method and apparatus of not adjusting park mode of power converter |
| US20100195355A1 (en) * | 2009-02-03 | 2010-08-05 | Iwatt Inc. | Switching power converter with load impedance detection |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104768793A (en) * | 2012-09-04 | 2015-07-08 | Abb技术有限公司 | Controlling a modular converter |
| CN104768793B (en) * | 2012-09-04 | 2017-06-23 | Abb 技术有限公司 | Control module formula converter |
| CN110620423A (en) * | 2018-06-19 | 2019-12-27 | 台达电子工业股份有限公司 | Power supply circuit and UPS auxiliary power supply system with same |
| CN110620423B (en) * | 2018-06-19 | 2022-10-14 | 台达电子工业股份有限公司 | Power supply circuit and UPS auxiliary power supply system with same |
| CN112803759A (en) * | 2019-11-13 | 2021-05-14 | 奇源科技有限公司 | Power supply conversion device |
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| CN102570827B (en) | 2014-11-05 |
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