CN102290979A - Power supplying device - Google Patents
Power supplying device Download PDFInfo
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- CN102290979A CN102290979A CN2011102300149A CN201110230014A CN102290979A CN 102290979 A CN102290979 A CN 102290979A CN 2011102300149 A CN2011102300149 A CN 2011102300149A CN 201110230014 A CN201110230014 A CN 201110230014A CN 102290979 A CN102290979 A CN 102290979A
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- transducer
- obfuscation
- reference signal
- proportional integral
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Abstract
The invention provides a power supplying device, which comprises a reference signal generator, a proportional integral fuzzy controller and a DC-DC (direct current to direct current) converter. The reference signal generator is used for providing a reference signal; the proportional integral fuzzy controller is coupled to the reference signal generator; and the DC-DC converter is coupled to the proportional integral fuzzy controller and is used for generating a DC voltage signal, wherein the proportional integral fuzzy controller is used for generating a first controlling signal for controlling the DC-DC converter according to the reference signal and the DC voltage signal. For the power supplying device provided by the invention, as control signals generated by the fuzzy controller are all digital signals, accurate control signals can be generated, and the phenomenon of overshooting and undershooting can be reduced and then unbeneficial influence on following circuits cannot be caused.
Description
Technical field
Content of the present invention relates to a kind of electric supply installation, and the electric supply installation of particularly controlling relevant for a kind of obfuscation.
Background technology
For the direct current supply in the circuit, generally need the DC-DC transducer, as booster type (Boost) transducer.In the prior art, the Boost transducer generally is by switch metal-oxide layer-semiconductor-field-effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET) On/Off carries out boost operations, and (Pulse Width Modulation PWM) produces the On/Off that modulation signal is controlled switch mosfet to see through pulse width modulation.And since in fact switch mosfet be imperfect element, when modulation signal is controlled it so that the inductance in the Boost transducer when discharging and recharging, because it is too violent that modulation signal switches, thereby be prone to overshoot (Overshoot) He Xiachong (Undershoot) phenomenon, and this will cause the output voltage of Boost transducer stable inadequately, thereby subsequent conditioning circuit is caused adverse effect, such as, produce and disturb.
In view of this, how designing a kind of electric supply installation, so that its output voltage stabilization, thereby can not cause adverse effect to subsequent conditioning circuit, is the technical problem that needs to be resolved hurrily of person skilled in the industry.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention proposes a kind of electric supply installation, comprise: a reference signal generator, in order to a reference signal to be provided; One proportional integral fuzzy controller is coupled to described reference signal generator; And a DC-DC transducer, be coupled to described proportional integral fuzzy controller, in order to produce a direct current voltage signal; Wherein, described proportional integral fuzzy controller produces one first control signal to control described DC-DC transducer according to described reference signal and described d. c. voltage signal.
Preferably, described proportional integral fuzzy controller comprises: a fuzzy controller, and fuzzy controller comprises: a fuzzier unit is coupled to described reference signal generator, in order to produce an obfuscation signal according to described reference signal and described reference signal; One obfuscation reasoning element is coupled to described fuzzier unit; One obfuscation rule base is coupled to described obfuscation reasoning element, in order to store a plurality of rules; And a defuzzification unit, be coupled to described obfuscation reasoning element; Wherein, producing a cbr signal, and described defuzzification unit carries out defuzzification to described cbr signal to be handled to produce one second control signal described obfuscation reasoning element according to described obfuscation signal and described rule.
Preferably, described proportional integral fuzzy controller also comprises: an operational amplifier, have a homophase input, an inverting input and an output, described in-phase input end couples described reference signal, described inverting input couples described d. c. voltage signal, in order to produce one first deviation signal according to described reference signal and described d. c. voltage signal; And one first proportional integral circuit, be coupled to the described output of described operational amplifier, in order to produce one second deviation signal and one first deviation variable quantity signal according to described first deviation signal, and described second deviation signal and the described first deviation variable quantity signal are passed to described fuzzier unit.
Preferably, described proportional integral obfuscation controller also comprises: one second proportional integral circuit, be coupled to described obfuscation controller, in order to described second control signal that provided according to described obfuscation controller to produce described first control signal, and, described first control signal is passed to described DC-DC transducer, to control the output of described DC-DC transducer.
Preferably, described reference signal is a square-wave signal.
Preferably, described DC-DC transducer is step-up DC-DC transducer.
Preferably, described DC-DC transducer is the buck DC-DC transducer.
Preferably, described DC-DC transducer is a buck-boost type DC-DC transducer.
Preferably, described DC-DC transducer is an inverse-excitation type DC-DC transducer.
For electric supply installation proposed by the invention, because the control signal that fuzzy controller produced all is a digital signal, therefore more can produce accurate control signal, thereby can reduce overshoot and following, and then can not cause adverse effect subsequent conditioning circuit towards phenomenon.
Description of drawings
Fig. 1 has illustrated the structural representation of the electric supply installation of an embodiment of the present invention.
Embodiment
Hereinafter be to cooperate appended graphic elaborating for embodiment, but the embodiment that is provided not is the scope that contains in order to restriction the present invention, and the description of structure running is non-in order to limit the order of its execution, any structure that reconfigures by element, the device with impartial effect that produces is all the scope that the present invention is contained.In addition, graphic only for the purpose of description, do not map according to life size.
About " pact " used herein, " approximately " or " roughly " generally typically refer to error in value or scope in percentage 20 in, be preferably in percentage ten in, more preferably then be in percentage five in.Wen Zhongruo does not have and offers some clarification on, and its mentioned numerical value is all regarded as approximation, promptly as " pact ", " approximately " or " roughly " represented error or scope.
Please refer to Fig. 1, Fig. 1 has illustrated the structural representation of the electric supply installation of an embodiment of the present invention.In the present embodiment, electric supply installation 1 in order to direct voltage to be provided, can be the control board power supply of liquid crystal display-driving, also can be for miscellaneous equipment or components and parts power supply, not as limit.
As shown in Figure 1, electric supply installation 1 comprises: a reference signal generator 11, a proportional integral fuzzy controller 12 and a DC-DC transducer 13.
DC-DC transducer 13 is coupled to proportional integral fuzzy controller 12, can be used to produce a direct current voltage signal Vo, to give other circuit supply.
In the present embodiment, for DC-DC transducer 13, preferably, being booster type (Boost) DC-DC transducer, also can be voltage-dropping type (Buck) DC-DC transducer, Buck-Boost DC-DC transducer and inverse-excitation type DC-DC transducer etc., not as limit.
Proportional integral fuzzy controller 12 is coupled to reference signal generator 11, and it can produce a control signal u with control DC-DC transducer according to reference signal Vref and d. c. voltage signal Vo.
As shown in Figure 1, proportional integral fuzzy controller 12 comprises a fuzzy controller 120, an operational amplifier 130, one first proportional integral circuit 140 and one second proportional integral circuit 150.
In the present embodiment, operational amplifier 130, have a homophase input, an inverting input and an output, in-phase input end couples reference signal Vref, inverting input couples d. c. voltage signal Vo, in order to reference signal Vref and d. c. voltage signal Vo are compared and produce a deviation signal e.
In the present embodiment, proportional integral circuit 140 is coupled to operational amplifier 130, comprises an integrator
The scale operation circuit of operational amplifier 141, scale factor S1 and the scale operation circuit of scale factor S2.Wherein, obtain deviation signal e after the deviation signal e process scale factor S1 scale operation processing of circuit
n, integrator
Deviation signal e is carried out an integral operation, its output is transferred to the inverting input of operational amplifier 141, and the signal of the in-phase input end of operational amplifier is deviation signal e, then produces deviation variable quantity signal delta e after the output signal Δ e process scale factor S2 scale operation processing of circuit of operational amplifier 141
n
In the present embodiment, fuzzy controller 120 comprises a fuzzier unit 121, an obfuscation reasoning element 122, an obfuscation rule base 123 and a defuzzification unit 124.
Fuzzier unit 121 is coupled to scale factor S1 scale operation circuit and scale factor S2 scale operation circuit; Obfuscation reasoning element 122 is coupled to fuzzier unit 121; Obfuscation rule base 123 is coupled to obfuscation reasoning element 122, in order to store a plurality of rules; Defuzzification unit 124 is coupled to obfuscation reasoning element 122.
In the present embodiment, at first, fuzzier unit 121 can be according to deviation signal e
nWith deviation variable quantity signal delta e
nProduce an obfuscation signal; Then, obfuscation reasoning element 122 produces a cbr signal according to the rule in obfuscation signal and the obfuscation rule base 123; Afterwards, the 124 pairs of cbr signals in defuzzification unit carry out the defuzzification processing to produce control signal Δ u.
In the present embodiment, required rule when obfuscation rule base 123 main functions provide 122 computings of obfuscation reasoning element, because input variable is after the process computing of obfuscation, various colloquial styles have been become, such as, honest (Positive Large, PL), center (Positive Medium, PM), just little (Positive Small, PS), zero (Zero, ZE), negative big (Negative Large, NL), negative in (Negative Medium, NM) and negative little (Negative Small, NS) etc.Therefore, in the present embodiment, the rule of obfuscation rule base 123 is made up of each spoken variable, and obfuscation rule base 123 is very important for fuzzy controller 12, rule in the obfuscation rule base 123 good and bad has very big influence to the performance of fuzzy controller 12.
In the present embodiment, obfuscation reasoning element 122 utilizes obfuscation rule base 123 to produce and the corresponding cbr signal of deviation signal e, and defuzzification unit 124 corresponding output control signal Δ u.Such as, when deviation signal e is PL, and deviation variation delta e can corresponding output control signal Δ u be PM then when being Zero.Wherein, in the present embodiment, can be for control signal Δ u and deviation signal e and the concrete corresponding relation of deviation variable quantity signal delta e with reference to table 1.
Table 1
In the present embodiment, the second proportional integral circuit 150, be coupled to obfuscation controller 120, in order to the control signal Δ u that produced according to obfuscation controller 120 to produce control signal u, this control signal u is in order to control DC-DC transducer 13, so that the required d. c. voltage signal Vo of DC-DC transducer 13 outputs.
In the present embodiment, the second proportional integral circuit 150 comprises scale operation circuit, the integrator of scale factor S3
And supercircuit 151, described second control signal is passed to described DC-DC transducer.Pass through integrator with control signal u after the scale operation processing of circuit of control signal Δ u process scale factor S3
Handling the back superposes through supercircuit 151.
In the present embodiment,, therefore more can produce accurate control signal, thereby can reduce overshoot and following, and then can not cause adverse effect subsequent conditioning circuit towards phenomenon because the control signal that fuzzy controller 120 is produced all is a digital signal.
Above, describe the specific embodiment of the present invention with reference to the accompanying drawings.But those skilled in the art can understand, and under situation without departing from the spirit and scope of the present invention, can also do various changes and replacement to the specific embodiment of the present invention.These changes and replace all drop in claims of the present invention institute restricted portion.
Claims (9)
1. an electric supply installation is characterized in that, comprises:
One reference signal generator is in order to provide a reference signal;
One proportional integral fuzzy controller is coupled to described reference signal generator; And
One DC-DC transducer is coupled to described proportional integral fuzzy controller, in order to produce a direct current voltage signal;
Wherein, described proportional integral fuzzy controller produces one first control signal to control described DC-DC transducer according to described reference signal and described d. c. voltage signal.
2. electric supply installation according to claim 1 is characterized in that, described proportional integral fuzzy controller comprises:
One fuzzy controller comprises:
One fuzzier unit is coupled to described reference signal generator, in order to produce an obfuscation signal according to described reference signal and described reference signal;
One obfuscation reasoning element is coupled to described fuzzier unit;
One obfuscation rule base is coupled to described obfuscation reasoning element, in order to store a plurality of rules; And
One defuzzification unit is coupled to described obfuscation reasoning element;
Wherein, producing a cbr signal, and described defuzzification unit carries out defuzzification to described cbr signal to be handled to produce one second control signal described obfuscation reasoning element according to described obfuscation signal and described rule.
3. electric supply installation according to claim 2 is characterized in that, described proportional integral fuzzy controller also comprises:
One operational amplifier, have a homophase input, an inverting input and an output, described in-phase input end couples described reference signal, and described inverting input couples described d. c. voltage signal, in order to produce one first deviation signal according to described reference signal and described d. c. voltage signal; And
One first proportional integral circuit, be coupled to the described output of described operational amplifier, in order to produce one second deviation signal and one first deviation variable quantity signal according to described first deviation signal, and described second deviation signal and the described first deviation variable quantity signal are passed to described fuzzier unit.
4. electric supply installation according to claim 2 is characterized in that, described proportional integral obfuscation controller also comprises:
One second proportional integral circuit, be coupled to described obfuscation controller, in order to described second control signal that provided according to described obfuscation controller to produce described first control signal, and, described first control signal is passed to described DC-DC transducer, to control the output of described DC-DC transducer.
5. electric supply installation according to claim 1 is characterized in that, described reference signal is a square-wave signal.
6. electric supply installation according to claim 1 is characterized in that, described DC-DC transducer is step-up DC-DC transducer.
7. electric supply installation according to claim 1 is characterized in that, described DC-DC transducer is the buck DC-DC transducer.
8. electric supply installation according to claim 1 is characterized in that, described DC-DC transducer is a buck-boost type DC-DC transducer.
9. electric supply installation according to claim 1 is characterized in that, described DC-DC transducer is an inverse-excitation type DC-DC transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102300149A CN102290979A (en) | 2011-08-08 | 2011-08-08 | Power supplying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102300149A CN102290979A (en) | 2011-08-08 | 2011-08-08 | Power supplying device |
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|---|---|
| CN102290979A true CN102290979A (en) | 2011-12-21 |
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| CN2011102300149A Pending CN102290979A (en) | 2011-08-08 | 2011-08-08 | Power supplying device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102638163A (en) * | 2012-04-12 | 2012-08-15 | 重庆大学 | DC-DC converter and control method thereof |
| CN103856045A (en) * | 2012-12-04 | 2014-06-11 | 韩山师范学院 | Fuzzy PI double-loop control method based on stratification thoughts |
-
2011
- 2011-08-08 CN CN2011102300149A patent/CN102290979A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102638163A (en) * | 2012-04-12 | 2012-08-15 | 重庆大学 | DC-DC converter and control method thereof |
| CN102638163B (en) * | 2012-04-12 | 2014-08-06 | 重庆大学 | DC-DC converter and control method thereof |
| CN103856045A (en) * | 2012-12-04 | 2014-06-11 | 韩山师范学院 | Fuzzy PI double-loop control method based on stratification thoughts |
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Application publication date: 20111221 |