CN1885695A - Soft start/stop DC switch power supply and its controlling method - Google Patents
Soft start/stop DC switch power supply and its controlling method Download PDFInfo
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- CN1885695A CN1885695A CN 200610019185 CN200610019185A CN1885695A CN 1885695 A CN1885695 A CN 1885695A CN 200610019185 CN200610019185 CN 200610019185 CN 200610019185 A CN200610019185 A CN 200610019185A CN 1885695 A CN1885695 A CN 1885695A
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Abstract
The disclosed dc soft on-off switch power comprises: an EMI filter 1, a non-control rectifier 2, a DC/DC converter 3, a detecting and regulating circuit 4, a drive circuit 5, and a controller 6 that composes by a mean calculation module A, a reciprocal-value calculation module B, a voltage/current PI controller C/D, a PWM module E, a first/second/third A/D (F/G/H), a first/second multiplier I/J, and a first/second comparator K/L. this invention uses CPU to control program and inhibit surge current, reduces extra loss and cost, and has wide application.
Description
Technical field
The present invention relates to a kind of direct-current switch power supply and control method thereof, relate in particular to a kind of method based on the soft start and stop of numerically controlled direct-current switch power supply.
Background technology
Direct direct-current switch power supply by mains supply, most use occasion is the input voltage height, the capacitance of input filtering and output filtering is big, will produce very large surge current connecting electrical network moment, not only can damage bridge rectifier diode, the fusing switch contact also can make high frequency transformer saturated, damages power switch pipe.Soft starting circuit can reduce the charging current of electric capacity, prevents the peak-peak of surge current effectively.
At present, direct-current switch power supply will be realized normally specialized designs soft starting circuit between uncontrollable rectifying part and direct current DC converters part of soft start, modal a kind of simple form is exactly a serial resistance, mainly limit the peak value of the surge current of input, but on resistance, also can consume certain electric energy simultaneously by the resistance in the soft starting circuit.Therefore traditional soft starting circuit has been introduced extra loss, causes power-efficient not high.And existing direct-current switch power supply does not limit the impulse current that capacitance voltage sudden change in the power remove process (perhaps halting only process) causes.
As Fig. 1, existing direct-current switch power supply by electromagnetic interface filter 1, do not control rectification 2, DC/DC 3, detect modulate circuit 4, drive circuit 5, controller 6 form;
Electromagnetic interface filter 1, do not control rectification 2, DC/DC converter 3 successively open loop connect;
DC/DC converter 3, detection modulate circuit 4, controller 6, drive circuit 5, DC/DC converter 3 closed loop successively connect;
When the output voltage of DC/DC converter 3 and reference value are inconsistent, will be regulated automatically.
Summary of the invention
Purpose of the present invention just is to overcome the shortcoming and defect that prior art exists, and a kind of soft start/stop DC switch power supply and control method thereof are provided.
The object of the present invention is achieved like this:
The energy that exchanges input is transferred on the positive and negative busbar through behind the Power Conversion, and electricity supply and use equipment uses.In shutdown process, detect VD as value of feedback, according to the drive signal of the soft start and stop rule power controlling translation circuit of setting, VD is changed according to the rule of design.Used " DC/DC circuit " and " power factor correction digital control module " are the elementary cells of numerically controlled direct-current switch power supply, need not the additional designs circuit, have reduced cost; And numerically controlled soft shutdown process can be provided with soft start and stop curve as required flexibly, reaches satisfied soft start and stop characteristic, reduces the impact to power consumption equipment.
Specifically:
The present invention adopts microprocessor (being called for short CPU) at controller shown in Figure 16, promptly is used as controller 6 with CPU, realizes the digital control of Switching Power Supply.Give CPU with output voltage through detecting modulate circuit 4, realize that by software the feedback closed loop control output voltage slowly rises or descends, suppress the rate of change of output voltage, thereby finish the soft start and stop function of power supply.
1, makes up circuit structure according to Fig. 2, especially select CPU for use.
2, increase a ball bearing made using that produces switching signal,, power switch signal is delivered to CPU as Fig. 4.
3,, mainly be constantly to rewrite voltage reference value to power supply voltage stabilizing subprogram to come control output voltage slowly to rise or decline its program flow diagram such as Fig. 5 for CPU writes software.
One, soft start/stop DC switch power supply
As Fig. 2, soft start/stop DC switch power supply comprises electromagnetic interface filter 1, does not control rectification 2, DC/DC converter 3, detect modulate circuit 4, drive circuit 5, controller 6;
Electromagnetic interface filter 1, do not control rectification 2, DC/DC converter 3 successively open loop connect;
DC/DC converter 3, detection modulate circuit 4, controller 6, drive circuit 5, DC/DC converter 3 closed loop successively connect;
When the output voltage of DC/DC converter 3 and reference value are inconsistent, will be regulated automatically.
As Fig. 3, described controller 6 is made up of mean value computation modules A, reciprocal calculation block B, voltage PI controller C, current PI controller D, PWM module E, an A/DF, the 2nd A/DG, the 3rd A/DH, the first multiplier I, the second multiplier J, the first comparator K, the second comparator L;
Its annexation is:
The power input voltage signal one tunnel that is obtained by an A/DF obtains the input voltage feed forward signal and delivers to first multiplier (I) through mean value computation modules A, reciprocal calculation block B successively, and second multiplier (J) is directly delivered on another road;
Deliver to the first comparator K by the output voltage signal that the 3rd A/DH obtains, give voltage PI controller C processing with the difference that reference value relatively obtains, voltage PI controller C outputs signal to multiplier I afterwards;
Deliver to and obtain current reference signal behind above-mentioned three road signal multiplications of multiplier I and deliver to the second comparator L;
Deliver to the second comparator L by the input current signal that the 2nd A/DG obtains, deliver to current PI controller D processing, deliver to PWM module E afterwards with the difference that current reference signal relatively obtains;
PWM module E output signal is to drive circuit 5.
Its operation principle is:
Fig. 3 is originally for there being the digital control schematic diagram of link power factor correction in the direct-current switch power supply, shown control strategy three amounts of need sampling: input voltage, input current and output voltage, finish by an A/DF, the 2nd A/DG, the 3rd A/DH respectively.Its control mode is voltage, the control of electric current dicyclo.Voltage PI controller C is used for control output voltage, and current PI controller D is used for proofreading and correct input current, make electric current can with the input voltage same-phase, thereby reach the effect of power factor correction.This is the controlling schemes that common digital power-factor is proofreaied and correct, and relevant speciality personnel's ratio is easier to realize.The present invention makes improvements on the basis of this control strategy just slightly, changes voltage reference value by software in real time according to the soft start and stop curve of expecting of voltage and realize the softening of change in voltage in soft shutdown process, thereby reduce surge current.So both realize necessary power factor emendation function, realized soft start and stop function again.
Two, soft start/stop DC switch power supply control method
Comprise the following steps:
1, in order to have reduced cost, eliminate excess loss, the present invention does not need design in addition soft start and stop circuit, but on the existing digitial controller by the program of software design in power factor correction in continuous change output voltage reference value realize soft start and stop.
2, by soft start and stop curve is set, reach satisfied soft start and stop characteristic, reduce impact to power consumption equipment.
In the software design of concrete digitial controller, introduce a coefficient of softing p dexterously, make
Vref＝p*Vo
Wherein, Vo is the stable DC output valve of expectation after power initiation finishes, i.e. reference value final value;
Vref is a voltage reference value
0≤p≤1。
3, increase p according to the soft start curve of expectation (be p with respect to the ascending curve of time, be called for short the p ascending curve) in soft start-up process, equaling 1 up to p just no longer increases, thereby realizes the soft uphill process of voltage; In like manner, in soft stopped process, stop curve (be p with respect to the decline curve of time, be called for short the p decline curve) and reduce p, equal 0 up to p and just no longer reduce, thereby realize the soft decline process of voltage according to expectation soft.
Especially, p ascending curve and p decline curve need obtain through a large amount of experiments, thereby obtain start and stop speed and reduce balance between the surge current.
Advantage of the present invention and good effect:
1, the present invention is without the soft start and stop circuit of specialized designs, realizes inhibition to surge current in power initiation and the stopped process by the CPU control program, thereby reduced excess loss and cost;
2, can be at different load characteristics easily by the soft start and stop curve of software change, to satisfy start and stop speed and the requirement that reduces surge current, flexible design;
3, be applicable to the direct-current switch power supply of all Digital Control.
Description of drawings
Fig. 1-existing Switching Power Supply structured flowchart;
Fig. 2-soft start/stop DC switch power supply schematic diagram of the present invention;
Fig. 3-controller principle figure of the present invention;
Fig. 4-power switch signal circuit diagram of the present invention;
Fig. 5-CPU program flow diagram of the present invention;
Wherein:
The 1-Electromagnetic interference filter is called for short electromagnetic interface filter;
The uncontrollable rectification of 2-is called for short and does not control rectification;
3-direct current DC converters is called for short the DC/DC converter;
4-input and modulate circuit are called for short and detect modulate circuit;
The 5-drive circuit;
The 6-controller.
A-output voltage average value computing module is called for short the mean value computation module;
B-output voltage average value reciprocal calculation block is called for short reciprocal calculation block;
C-voltage PI controller;
D-current PI controller;
The E-pulse width modulation module is called for short the PWM module
The F-first analog/digital conversion passage is called for short an A/D;
The G-second analog/digital conversion passage is called for short the 2nd A/D;
H-the 3rd analog/digital conversion passage is called for short the 3rd A/D;
I-first multiplier;
J-second multiplier;
K-first comparator;
L-second comparator.
A-begins;
The b-system initialization, promptly voltage reference value makes zero, predetermined voltage reference value final value;
C-sense switch signal?
D-increases voltage reference value;
E-calls the voltage stabilizing subprogram
F-reference value=predetermined value?
G-reduces voltage reference value;
H-reference value=0?
Embodiment
Further specify below in conjunction with drawings and Examples:
One, the soft start/stop DC switch power supply functional block chooses
1, electromagnetic interface filter 1
Electromagnetic interface filter 1 is selected the electromagnetic interface filter of model ZJG2206M-P for use;
2, do not control rectification 2
Do not control rectification 2 and select the KBL06 rectification module for use;
3, the DC/DC converter 3
What DC/DC converter 3 adopted is step-up DC/DC converter, i.e. Boost converter, and that wherein the power MOSFET of core is selected for use is the IRF840 of international rectification company (being called for short IR company);
4, detect modulate circuit 4
Detecting modulate circuit 4 selects for use the LV25-P of Switzerland LEM company and LA25-P to make the voltage and current transducer respectively;
5, drive circuit 5
That drive circuit 5 adopts is the IR2117 of IR company, and this is the high-speed power MOSFET chip for driving of a high voltage.
6, controller 6
The model that the CPU of controller 6 selects for use TI company to produce is the DSP of TMS320LF2407A, this DSP is inner integrated analog/digital converter and PWM module.Therefore, utilize this DSP can be relatively easy to realize the controlling schemes shown in Fig. 2 middle controller 6.
Two, this program circuit comprises, as Fig. 5:
Beginning a; System initialization, voltage reference value makes zero, predetermined voltage reference value final value (abbreviation predetermined value) b; Sense switch signal c just continues sense switch signal c if close, and just carries out the soft start subprogram if open;
Wherein soft start subprogram part flow process is;
Increase voltage reference value d, call voltage stabilizing subprogram e; Check valve signal c just forwards the soft subprogram that stops to if close, and just continues the back program if open; Judge reference value=predetermined value f, just forwarding to if not increases voltage reference value d, if just call voltage stabilizing subprogram e; Sense switch signal c just forwards the soft subprogram that stops to if close, and just calls voltage stabilizing subprogram e if open, and sense switch signal c just forwards the soft subprogram that stops to if close once more, just calls voltage stabilizing subprogram e if open, constantly circulation.
The wherein soft subprogram part flow process that stops is:
Reduce voltage reference value g; Call voltage stabilizing subprogram e; Sense switch signal c just forwards the soft start subprogram to if open, and just continues the back program if close; Judge reference value=0h, just forward to if not and reduce voltage reference value g, if just just call voltage stabilizing subprogram e; Sense switch signal c just forwards the soft start subprogram to if open, and just calls voltage stabilizing subprogram e if close, and sense switch signal c just forwards the soft start subprogram to if open once more, just calls voltage stabilizing subprogram e if close, constantly circulation.
Wherein voltage stabilizing subprogram is exactly the subprogram of writing according in the annexation of 6 each modules of the controller described in the summary of the invention.
Claims (2)
1, a kind of soft start/stop DC switch power supply comprises electromagnetic interface filter (1), does not control rectification (2), DC/DC converter (3), detects modulate circuit (4), drive circuit (5), controller (6);
Electromagnetic interface filter (1), do not control rectification (2), DC/DC converter (3) successively open loop connect;
DC/DC converter (3), detection modulate circuit (4), controller (6), drive circuit (5), DC/DC converter (3) closed loop successively connect;
It is characterized in that:
Described controller 6 is made up of mean value computation module (A), reciprocal calculation block (B), voltage PI controller (C), current PI controller (D), PWM module (E), an A/D (F), the 2nd A/D (G), the 3rd A/D (H), first multiplier (I), second multiplier (J), first comparator (K), second comparator (L);
Its annexation is:
The power input voltage signal one tunnel that is obtained by an A/D (F) passes through mean value computation module (A) successively, reciprocal calculation block (B) obtains the input voltage feed forward signal and delivers to first multiplier (I), and second multiplier (J) is directly delivered on another road;
Deliver to first comparator (K) by the output voltage signal that the 3rd A/D (H) obtains, give voltage PI controller (C) processing with the difference that reference value relatively obtains, voltage PI controller (C) outputs signal to multiplier (I) afterwards;
Deliver to and obtain current reference signal behind above-mentioned three road signal multiplications of multiplier (I) and deliver to second comparator (L);
Deliver to second comparator (L) by the input current signal that the 2nd A/D (G) obtains, deliver to current PI controller (D) processing, deliver to PWM module (E) afterwards with the difference that current reference signal relatively obtains;
PWM module (E) output signal is to drive circuit (5).
2, a kind of soft start/stop DC switch power supply control method is characterized in that:
1. realize soft start and stop constantly changing the output voltage reference value in by the program of software design on the digitial controller in power factor correction;
2. soft start and stop curve is set, Vref=p*Vo
Wherein, Vo is the stable DC output valve of expectation after power initiation finishes, i.e. reference value final value;
Vref is a voltage reference value;
0≤p≤1；
3. in soft start-up process, increase p, equal 1, thereby realize the soft uphill process of voltage up to p according to the p ascending curve; In soft stopped process, reduce p according to the p decline curve, equal 0 up to p, thereby realize the soft decline process of voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100191856A CN100409548C (en) | 2006-05-31 | 2006-05-31 | Soft start/stop DC switch power supply and its controlling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100191856A CN100409548C (en) | 2006-05-31 | 2006-05-31 | Soft start/stop DC switch power supply and its controlling method |
Publications (2)
| Publication Number | Publication Date |
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| CN1885695A true CN1885695A (en) | 2006-12-27 |
| CN100409548C CN100409548C (en) | 2008-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102255529A (en) * | 2011-06-17 | 2011-11-23 | 湖南大学 | Comprehensive control method for high-power efficient energy consuming high-frequency switching power supply |
| CN102346464A (en) * | 2011-06-14 | 2012-02-08 | 武汉科技大学 | 0-20mA or 4-20mA direct current analog quantity output device |
| CN105305803A (en) * | 2015-10-26 | 2016-02-03 | 华南理工大学 | BOOST PFC convertor starting output voltage anti-overshoot digital control method |
| CN105915042A (en) * | 2016-05-27 | 2016-08-31 | 电子科技大学 | Soft start and soft shutoff circuit for Buck converters |
| CN106547299A (en) * | 2016-10-09 | 2017-03-29 | 河北汉光重工有限责任公司 | A kind of high precision closed loop reference power source |
| CN106655752A (en) * | 2016-10-27 | 2017-05-10 | 昆明理工大学 | Switching power supply PFC (Power Factor Correction) control system and PWM (Pulse Width Modulation) signal generating method thereof |
| CN111697815A (en) * | 2020-05-26 | 2020-09-22 | 北京国铁路阳技术有限公司 | Circuit and method for prolonging service life of electrolytic capacitor in high-power PFC circuit |
| CN113328614A (en) * | 2021-05-31 | 2021-08-31 | 无锡先导智能装备股份有限公司 | Soft start-stop control method and device, electronic equipment and storage medium |
| CN113783408A (en) * | 2021-09-17 | 2021-12-10 | 合肥美的电冰箱有限公司 | Power module control method and device, power equipment, electric appliance and storage medium |
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| DE3521805A1 (en) * | 1985-06-19 | 1987-01-02 | Philips Patentverwaltung | Pulsed DC/DC voltage converter |
| CN1032719C (en) * | 1992-08-20 | 1996-09-04 | 北京铁路局计量管理所 | Logarithmic curve soft start circuit for switching power supply |
| CN2501243Y (en) * | 2001-09-24 | 2002-07-17 | 梁准强 | DC-DC mini boosted circuit |
| CN1322652C (en) * | 2002-08-31 | 2007-06-20 | 艾默生网络能源有限公司 | Bus voltage soft actuating method in uninterrupted power source and its device |
| CN1333512C (en) * | 2003-03-28 | 2007-08-22 | 圆创科技股份有限公司 | Error amplifier and direct current voltage conversion circuit and its method |
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| CN102346464A (en) * | 2011-06-14 | 2012-02-08 | 武汉科技大学 | 0-20mA or 4-20mA direct current analog quantity output device |
| CN102255529B (en) * | 2011-06-17 | 2012-06-27 | 湖南大学 | Comprehensive control method for high-power efficient energy consuming high-frequency switching power supply |
| CN102255529A (en) * | 2011-06-17 | 2011-11-23 | 湖南大学 | Comprehensive control method for high-power efficient energy consuming high-frequency switching power supply |
| CN105305803A (en) * | 2015-10-26 | 2016-02-03 | 华南理工大学 | BOOST PFC convertor starting output voltage anti-overshoot digital control method |
| CN105915042B (en) * | 2016-05-27 | 2018-06-29 | 电子科技大学 | A kind of soft start and soft breaking circuit for Buck converters |
| CN105915042A (en) * | 2016-05-27 | 2016-08-31 | 电子科技大学 | Soft start and soft shutoff circuit for Buck converters |
| CN106547299A (en) * | 2016-10-09 | 2017-03-29 | 河北汉光重工有限责任公司 | A kind of high precision closed loop reference power source |
| CN106547299B (en) * | 2016-10-09 | 2017-11-03 | 河北汉光重工有限责任公司 | A kind of high precision closed loop reference power source |
| CN106655752A (en) * | 2016-10-27 | 2017-05-10 | 昆明理工大学 | Switching power supply PFC (Power Factor Correction) control system and PWM (Pulse Width Modulation) signal generating method thereof |
| CN111697815A (en) * | 2020-05-26 | 2020-09-22 | 北京国铁路阳技术有限公司 | Circuit and method for prolonging service life of electrolytic capacitor in high-power PFC circuit |
| CN113328614A (en) * | 2021-05-31 | 2021-08-31 | 无锡先导智能装备股份有限公司 | Soft start-stop control method and device, electronic equipment and storage medium |
| CN113328614B (en) * | 2021-05-31 | 2022-08-19 | 无锡先导智能装备股份有限公司 | Soft start-stop control method and device, electronic equipment and storage medium |
| CN113783408A (en) * | 2021-09-17 | 2021-12-10 | 合肥美的电冰箱有限公司 | Power module control method and device, power equipment, electric appliance and storage medium |
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| CN100409548C (en) | 2008-08-06 |
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