CN105450263A - Constant voltage output circuit closed loop method and system - Google Patents
Constant voltage output circuit closed loop method and system Download PDFInfo
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- CN105450263A CN105450263A CN201510868458.3A CN201510868458A CN105450263A CN 105450263 A CN105450263 A CN 105450263A CN 201510868458 A CN201510868458 A CN 201510868458A CN 105450263 A CN105450263 A CN 105450263A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/56—Circuits for coupling, blocking, or by-passing of signals
Abstract
The invention provides a constant voltage output circuit closed loop method and system, and belongs to the field of carrier communication. A main control chip is connected with a filtering and amplifying module through a DAC end, the filtering and amplifying module is connected with a coupling network module, the output of the filtering and amplifying module is connected with the main control chip through the DAC end, and the coupling network module is connected with a 220V network. AD sampling is carried out on a carrier output, filtered and amplified signal, a signal peak voltage finally output to the 220V network is determined according to the peak detection of an internal algorithm of the main control chip, and the signal peak voltage is compared with a set transmission voltage; if the output voltage is smaller than the set voltage resulting from the load change of a power network, the duty ratio of a pulse width modulated signal of a carrier chip is improved by software to improve the voltage of a carrier signal input to the power network; and on the contrary, the duty ratio of the pulse width modulated signal is reduced to finally counteract the load change to guarantee the consistency of a peak-to-peak value of the output voltage.
Description
Technical field
The present invention relates to circuit closed-loop policy and the system of the output of a kind of constant voltage, belong to carrier communication field.
Background technology
Carrier communication field gives to limit for the emitting voltage of carrier signal determines that carrier signal can not have an impact to the power supply of normal electric power network.The load of electric power network is a time dependent uncertain load, may from several ohm to tens ohm, under heavy duty, carrier signal may cause output signal peak-to-peak value to reduce due to internal resistance dividing potential drop, not only utilance is reduced for the voltage sent, and carrier wave successful receiving rate may be caused.
Summary of the invention
The invention provides circuit closed-loop policy and the system of the output of a kind of constant voltage, can realize reaching output voltage peak value based on the duty ratio of the peak-to-peak value closed-loop adjustment carrier pulse width modulated of output voltage constant.
The circuit closed-loop system that constant voltage exports, main control chip connects filter and amplification module, filter and amplification model calling coupling network module by DAC end, and the output of filter and amplification module is connected main control chip and held by ADC, coupling network model calling 220V network.
Carrier wave output filtering amplifying signal is carried out AD sampling, by the peakvalue's checking of main control chip internal algorithm, determines the signal peak voltage finally outputted in 220VAC network, by comparing with the emitting voltage of setting; If because electric power network load variations causes output voltage to be less than setting voltage, then the duty ratio being improved the pulse width modulating signal of carrier chip by software improves the voltage of the carrier signal be input in electric power network; Otherwise then reduce the duty ratio of pulse width modulating signal, final load variations of offsetting makes output voltage peak-to-peak value constant.
The circuit closed-loop policy that constant voltage exports, containing the duty ratio step by feeding back real-time adjustment carrier chip; Gather by AD the voltage being sent to 220VAC electric power network by real-time, obtained the peak-to-peak value of output voltage by software algorithm; The crest voltage calculated by algorithm regulates the duty ratio of the output pulse width modulation signal of carrier chip in real time, for offsetting the carrier signal amplitude change because load variations causes.
Carrier signal Acquisition Circuit step and control algolithm step is contained by the duty ratio step feeding back real-time adjustment carrier chip,
Carrier signal Acquisition Circuit step: the signal being finally input to 220VAC electric power network is carried out data acquisition by the AD pin of main control chip; Carrier wave sends divisional processing when adopting with reception; Under carrier wave accepting state, not Storage and Processing Information Monitoring, under carrier wave transmission state, gathers the voltage signal (this time need be at least centre carrier frequency corresponding cycle time) of certain hour, and the peak value of calculating voltage signal.
Control algolithm step: this peak value is compared with the value of software set, when sampled value is less than set point, improve the duty ratio of the output pulse width modulation signal of carrier chip, this pulse duration comprises specific digital adjustable gear, final signal involves the power amplification circuit of fixing multiplication factor by low pass filtered, exports the front end of coupling network to.
Advantage of the present invention can obtain on the power circuit of load real-time change not with the carrier signal of the constant peak voltage of load variations, make to send signal more stable, can not only under standard limited value sends the prerequisite of peak value, meet the requirement of standard when varying duty, and the transmission range that can improve carrier signal in the heavy duty situation of power line is to improve the Signal reception success rate that carrier wave accepts system.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, by referring to detailed description below, more completely can understand the present invention better and easily learn wherein many adjoint advantages, but accompanying drawing described herein is used to provide a further understanding of the present invention, form a part of the present invention, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention, as schemed wherein:
Fig. 1 is hardware configuration schematic diagram of the present invention.
Fig. 2 is software flow pattern of the present invention.
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment
Obviously, the many modifications and variations that those skilled in the art do based on aim of the present invention belong to protection scope of the present invention.
Embodiment 1: as shown in Figure 1 and Figure 2, the circuit closed-loop system that a kind of constant voltage exports, main control chip connects filter and amplification module by DAC end, filter and amplification model calling coupling network module, the output of filter and amplification module is connected main control chip and is held by ADC, coupling network model calling 220V mixed-media network modules mixed-media.
The circuit closed-loop policy that constant voltage exports, containing the duty ratio step by feeding back real-time adjustment carrier chip; Gather by AD the voltage being sent to 220VAC electric power network by real-time, recorded the peak-to-peak value of output voltage by software algorithm; The crest voltage obtained by algorithm regulates the duty ratio of the output pulse width modulation signal of carrier chip in real time, for offsetting the carrier signal amplitude change because load variations causes.
Carrier signal Acquisition Circuit step and control algolithm step is contained by the duty ratio step feeding back real-time adjustment carrier chip,
Carrier signal Acquisition Circuit step: the signal being finally input to 220VAC electric power network is carried out data acquisition by the AD pin of main control chip; Carrier wave sends divisional processing when adopting with reception; Under carrier wave accepting state, not Storage and Processing Information Monitoring, under carrier wave transmission state, gathers the voltage signal (this time need be at least centre carrier frequency corresponding cycle time) of certain hour, and the peak value of calculating voltage signal.
Control algolithm step: this peak value is compared with the value of software set, when sampled value is less than set point, improve the duty ratio of the output pulse width modulation signal of carrier chip, this pulse duration comprises specific digital adjustable gear, final signal involves the power amplification circuit of fixing multiplication factor by low pass filtered, exports the front end of coupling network to.
The circuit closed-loop policy that constant voltage exports, containing following steps;
Step 1, program start;
Step 2, determine whether carrier wave send state; If so, step 3 is performed; If not circulate this step;
Step 3, collection at least one cycle of voltage signal;
Step 4, determine peak-to-peak value;
Step 5, judgement compare with set point; Be greater than set point, perform step 7; Be less than set point, perform step 6; Equal set point, perform step 2;
Step 6, raising carrier wave send pulse width modulated duty cycle; Perform step 2;
Step 7, reduction carrier wave send pulse width modulated duty cycle; Perform step 2.
As mentioned above, embodiments of the invention are explained, but as long as do not depart from inventive point of the present invention in fact and effect can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, such variation is also all included within protection scope of the present invention.
Claims (5)
1. a circuit closed-loop policy for constant voltage output, is characterized in that containing the duty ratio step by feeding back real-time adjustment carrier chip; Gather by AD the voltage being sent to 220VAC electric power network by real-time, obtained the peak-to-peak value of output voltage by software algorithm; The crest voltage calculated by algorithm regulates the duty ratio of the output pulse width modulation signal of carrier chip in real time, for offsetting the carrier signal amplitude change because load variations causes.
2. the circuit closed-loop policy of a kind of constant voltage output according to claim 1, is characterized in that the duty ratio step by feeding back real-time adjustment carrier chip contains carrier signal Acquisition Circuit step and control algolithm step,
Carrier signal Acquisition Circuit step: the signal being finally input to 220VAC electric power network is carried out data acquisition by the AD pin of main control chip; Carrier wave sends divisional processing when adopting with reception; Under carrier wave accepting state, not Storage and Processing Information Monitoring, under carrier wave transmission state, gathers the voltage signal (this time need be at least centre carrier frequency corresponding cycle time) of certain hour, and the peak value of calculating voltage signal;
Control algolithm step: this peak value is compared with the value of software set, when sampled value is less than set point, improve the duty ratio of the output pulse width modulation signal of carrier chip, this pulse duration comprises specific digital adjustable gear, final signal involves the power amplification circuit of fixing multiplication factor by low pass filtered, exports the front end of coupling network to.
3. the circuit closed-loop policy of a kind of constant voltage output according to claim 1, is characterized in that containing following steps:
Step 1, program start;
Step 2, determine whether carrier wave send state; If so, step 3 is performed; If not circulate this step;
Step 3, collection at least one cycle of voltage signal;
Step 4, determine peak-to-peak value;
Step 5, judgement compare with set point; Be greater than set point, perform step 7; Be less than set point, perform step 6; Equal set point, perform step 2;
Step 6, raising carrier wave send pulse width modulated duty cycle; Perform step 2;
Step 7, reduction carrier wave send pulse width modulated duty cycle; Perform step 2.
4. the circuit closed-loop system of a constant voltage output, it is characterized in that main control chip connects filter and amplification module by DAC end, filter and amplification model calling coupling network module, the output of filter and amplification module is connected main control chip and is held by ADC, coupling network model calling 220V network.
5. the circuit closed-loop policy of a kind of constant voltage output according to claim 4, carrier wave output filtering amplifying signal is it is characterized in that to carry out AD sampling, by the peakvalue's checking of main control chip internal algorithm, determine the signal peak voltage finally outputted in 220VAC network, by comparing with the emitting voltage of setting; If because electric power network load variations causes output voltage to be less than setting voltage, then the duty ratio being improved the pulse width modulating signal of carrier chip by software improves the voltage of the carrier signal be input in electric power network; Otherwise then reduce the duty ratio of pulse width modulating signal, final load variations of offsetting makes output voltage peak-to-peak value constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510868458.3A CN105450263A (en) | 2015-12-01 | 2015-12-01 | Constant voltage output circuit closed loop method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510868458.3A CN105450263A (en) | 2015-12-01 | 2015-12-01 | Constant voltage output circuit closed loop method and system |
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| CN105450263A true CN105450263A (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510868458.3A Pending CN105450263A (en) | 2015-12-01 | 2015-12-01 | Constant voltage output circuit closed loop method and system |
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| CN (1) | CN105450263A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111226506A (en) * | 2019-12-31 | 2020-06-02 | 宗仁科技(平潭)有限公司 | Power carrier signal identification circuit, method and integrated circuit chip |
| CN111257628A (en) * | 2020-03-05 | 2020-06-09 | 成都飞机工业（集团）有限责任公司 | Anti-interference method for converting alternating current signal into pulse signal |
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| CN103281094A (en) * | 2013-05-27 | 2013-09-04 | 珠海精讯电子科技有限公司 | Plug and play module for hybrid modulation mode-based power line carrier communication |
| CN104980039A (en) * | 2015-07-15 | 2015-10-14 | 深圳市镭润科技有限公司 | Switching power supply and method and device for controlling switching power supply |
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2015
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| CN103036593A (en) * | 2012-12-30 | 2013-04-10 | 青岛东软载波科技股份有限公司 | Low-voltage power line carrier communication circuit |
| CN103281094A (en) * | 2013-05-27 | 2013-09-04 | 珠海精讯电子科技有限公司 | Plug and play module for hybrid modulation mode-based power line carrier communication |
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| CN111226506A (en) * | 2019-12-31 | 2020-06-02 | 宗仁科技(平潭)有限公司 | Power carrier signal identification circuit, method and integrated circuit chip |
| CN111226506B (en) * | 2019-12-31 | 2022-07-26 | 宗仁科技(平潭)有限公司 | Power carrier signal identification circuit, method and integrated circuit chip |
| CN111257628A (en) * | 2020-03-05 | 2020-06-09 | 成都飞机工业（集团）有限责任公司 | Anti-interference method for converting alternating current signal into pulse signal |
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Application publication date: 20160330 |
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