CN102624427B - Synchronous transmission system of energy and information - Google Patents
Synchronous transmission system of energy and information Download PDFInfo
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- CN102624427B CN102624427B CN2012100553960A CN201210055396A CN102624427B CN 102624427 B CN102624427 B CN 102624427B CN 2012100553960 A CN2012100553960 A CN 2012100553960A CN 201210055396 A CN201210055396 A CN 201210055396A CN 102624427 B CN102624427 B CN 102624427B
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Abstract
The invention discloses a synchronous transmission system of energy and information, which comprises a direct current bus, a direct current power supply and a plurality of energy information transmission units, and the direct current power supply and the plurality of energy information transmission units are connected with the direct current bus. Each energy information transmission unit comprises a Boost circuit, a sampling circuit, a carrier detecting circuit, a control circuit and a driving circuit. The synchronous transmission system of the energy and the information enables power line carrier communication technology to be combined with characteristics of the Boost circuits, achieves synchronous transmission of the energy and the information under the premise that circuit modulation is not required additionally, volume of the system and use of corresponding devices are reduced, extra connecting lines are not required, and characteristics of communication channels can be designed according to requirements.
Description
Technical field
The invention belongs to the power electronics communication technical field, be specifically related to the synchronous transmission system of a kind of energy and information.
Background technology
Along with the develop rapidly of electronic technology, the new ideas such as Internet of Things just progressively are accepted.Be no matter different power converter module in different power conversion system or same system, want to realize set function, except the needs power supply provides electric energy, also need cooperation and the coordination of communication function each other.
In power electronic technology, DC-DC(DC-to-DC) converter just by the opening and turn-offing of control switch pipe, is realized conversion and the transmission of energy originally.When a system has a plurality of DC-DC converters to be the power supply of different equipment, often need to add communication function, transmission of information between each DC-DC converter, co-ordination.
In the face of the Energy Transfer two kinds of different functional requirements of communicate by letter with signal, traditional solution is general adopts two to overlap the function that different hardware circuits is processed respectively Energy Transfer and communication; The components and parts that this traditional design is used are more, and volume is larger, needs extra connecting line.
At present, in the communications field, power line carrier communication (PLC) technology has obtained broad research and application.On its power line that carrier signal is added to, by existing power circuit transmission data, avoided extra wiring.But the realization of power line carrier communication often needs extra carrier modulation circuit, and this circuit has comprised coupling transformer, and volume is large, and cost is high; Traditional power line carrier communication is that superimposed digital signal is carried out communication on existing power circuit simultaneously, and the energy transmitted on circuit is uncontrolled, and the characteristic of channel can not change.
The Chinese patent that application number is 200910191716.3 discloses a kind of energy signal synchronous transmission device and method, this technology has increased signal modulator on main circuit, signal extraction and ReSet Circuit have been increased on secondary loop, the same with power line carrier communication, need to increase extra signal modulator, increase volume and the cost of circuit, and just be used for the regulating system Implantation Energy.
Summary of the invention
For the existing above-mentioned technological deficiency of prior art, the invention provides the synchronous transmission system of a kind of energy and information, realized the synchronous transmission of energy and information under the prerequisite without extra modulation circuit.
The synchronous transmission system of a kind of energy and information comprises: a direct current power supply, a direct current bus and energy information transmission unit some and that corresponding load is connected; Described DC power supply and energy information transmission unit all are connected on described DC bus.
Described energy information transmission unit comprises:
Boost(boosts) circuit, flow to load after the direct current on DC bus is boosted, and produce harmonic signal to DC bus;
Sample circuit, the status signal of collection load; Described status signal comprises the state informations such as current signal, voltage signal;
Carrier detecting circuit, receive from DC bus the harmonic signal that other energy information transmission units produce, and this harmonic signal is carried out to outgoing carrier signal after filter and amplification;
Control circuit, carry out successively analog-to-digital conversion and analyze identification described carrier signal or status signal, according to recognition result, constructs switching signal;
Drive circuit, carry out power amplification to described switching signal, and utilize the switching signal after power amplification to be controlled the switching tube in the Boost circuit.
Preferably, described Boost circuit comprises an inductance, an electric capacity and two switching tubes; Wherein, an end of inductance is connected with DC bus, and the other end is connected with the drain electrode of second switch pipe with the drain electrode of the first switching tube; The source electrode of second switch pipe is connected with an end of electric capacity and an end of load; The source electrode of the first switching tube is connected with the other end of the other end of electric capacity and load and ground connection; Switching signal after the power amplification of the grid reception drive circuit output of the first switching tube or second switch pipe; Can prevent that the Boost circuit from entering the interrupter duty pattern current waveform on inductance is impacted.
The switching signal complementation that described the first switching tube and second switch pipe receive.
Preferably, described DC power supply is connected on DC bus by impedance matching network; Can weaken the interference that communication is caused.
Described impedance matching network comprises an inductance, an electric capacity and a resistance; Wherein, an end of inductance is connected with the positive pole of DC power supply, and the other end is connected with an end of electric capacity; The other end of electric capacity is connected with an end of resistance, and the other end of resistance is connected with the negative pole of DC power supply and ground connection.
Preferably, described control circuit is connected with man-machine interface; Make the user to be controlled system.
Described control circuit is according to recognition result, by duty ratio or switching frequency adjustment are constructed to corresponding switching signal; Wherein:
For Energy Transfer, make the switching frequency of switching signal constant, adjust the duty ratio of switching signal;
For communication, make the duty ratio of switching signal constant, adjust the switching frequency of switching signal in each chip period; The integral multiple that described chip period is switch periods.
Described control circuit is the DSP(digital signal processor).
The present invention makes power-line carrier communication combine with the characteristic of Boost circuit, realized the synchronous transmission of energy and information under prerequisite without extra modulation circuit, reduced the use of volume and the corresponding components and parts of system, do not need extra connecting line, and the characteristic of communication channel also can be designed as required.
When simultaneously the present invention is applied to the occasion such as power-supply system that LED illuminator, electric automobile, many output require, new energy grid-connected power, can, under the prerequisite that does not increase extra modulation circuit, only use a special circuit transmitting energy and signal simultaneously; Therefore the present invention can realize centralized control easily, condition monitoring, and carrier signal amplitude stabilization, irrelevant, only relevant to input voltage and output voltage with load current.
The accompanying drawing explanation
The structural representation that Fig. 1 is system of the present invention.
The structural representation that Fig. 2 is carrier detecting circuit.
The waveform schematic diagram that Fig. 3 is switching signal and harmonic signal.
Embodiment
In order more specifically to describe the present invention, below in conjunction with the drawings and the specific embodiments, technical scheme of the present invention is elaborated.
Apply the present invention in the LED illuminator, as shown in Figure 1, the synchronous transmission system of a kind of energy and information comprises: a direct current power supply E, a direct current bus and n the energy information transmission unit be connected with corresponding load; N energy information transmission unit all is connected on DC bus; Load in present embodiment is the LED(light-emitting diode).
DC power supply E is connected on DC bus by impedance matching network; Impedance matching network comprises an inductance L r, a capacitor C r and a resistance R r; Wherein, the end of inductance L r is connected with the positive pole of DC power supply E, and the other end is connected with the end of capacitor C r; The other end of capacitor C r is connected with the end of resistance R r, and the other end of resistance R r is connected with the negative pole of DC power supply E and ground connection.
The energy information transmission unit comprises Boost circuit, sample circuit, carrier detecting circuit, drive circuit and DSP; Wherein:
The Boost circuit flows to LED for after the direct current on DC bus is boosted, and produces harmonic signal to DC bus; In present embodiment, the Boost circuit comprises an inductance L, a capacitor C and two switching tube Q1～Q2; Wherein, an end of inductance L is connected with DC bus, and the other end is connected with the drain electrode of second switch pipe Q2 with the drain electrode of the first switching tube Q1; The source electrode of second switch pipe Q2 is connected with the anode of an end of capacitor C and LED; The source electrode of the first switching tube Q1 is connected with the negative electrode of the other end of capacitor C and LED and ground connection; The grid of the first switching tube Q1 and second switch pipe Q2 all receives the switching signal after the power amplification of drive circuit output; The switching signal complementation that the first switching tube Q1 and second switch pipe Q2 receive.
Sample circuit is for gathering the current signal of LED; In present embodiment, sample circuit is current sensor.
Carrier detecting circuit is for receive the harmonic signal that other energy information transmission units produce from DC bus, and this harmonic signal is carried out to outgoing carrier signal after filter and amplification; As shown in Figure 2, in present embodiment, carrier detecting circuit comprises five resistance R 1～R5, three capacitor C 1～C3 and an operational amplifier LM318; Wherein: C1 mono-termination DC bus, another termination R1; The normal phase input end of another termination of R1 R2, R3 and LM318; The R2 other end and LM318 positive supply termination VCC; The R3 other end and C2 connect and ground connection; Another termination of C2 R4; The inverting input of another termination of R4 R5, C3 and LM318; The negative power end ground connection of LM318; The output of LM318 connects with the R5 other end and the C3 other end and meets DSP.
DSP is for carrier signal or current signal are carried out successively analog-to-digital conversion and analyzed identification, by duty ratio or switching frequency adjustment are constructed to corresponding switching signal; Wherein: for Energy Transfer, make the switching frequency of switching signal constant, adjust the duty ratio of switching signal; For communication, make the duty ratio of switching signal constant, adjust the switching frequency of switching signal in each chip period.In present embodiment, DSP adopts TMS320F28035; Wherein, the DSP in the first energy information transmission unit also is connected with man-machine interface.
Drive circuit is used for switching signal is carried out to power amplification, and utilizes the switching signal after power amplification to be controlled the switching tube Q1～Q2 in the Boost circuit; In present embodiment, drive circuit adopts chip I R2101.
In present embodiment, current sensor collects the current signal (6A) of LED, and DSP carries out analog-to-digital conversion 6 → 110 by this current signal; In order not affect Energy Transfer, DSP makes the duty ratio of switching signal constant, as shown in Figure 3, and respectively corresponding three the continuous chip period of three digital quantities of 110, DSP, by adjusting the switching frequency of switching signal in each chip period, wherein makes the switching frequency of the first two chip period be f
1, the switching frequency that makes last chip period is f
2(f
2=2f
1), constructing corresponding switching signal and controlled in order to the switching tube in the Boost circuit, and then the harmonic frequency of Boost circuit generation is controlled, this harmonic wave can be used as the carrier signal of communication; S in figure
1for the switching signal of the first switching tube Q1 in the Boost circuit, i
lcurrent signal (being the harmonic signal that the Boost circuit produces) for inductance L in the Boost circuit.
In the energy information transmission unit, the Boost circuit carries out the transformation of electrical energy transmission as the DC-DC circuit, is the LED power supply; Simultaneously, the Boost circuit can produce certain harmonic wave at input, similar with communication carrier, and this harmonic signal can be arrived by other unit inspections under same DC bus; The harmonic spectrum produced by controlling this unit, do not affect the Energy Transfer of Boost circuit simultaneously, and this harmonic component just can be used as a kind of carrier wave and communicates so, thereby makes system realize the synchronous transmission of energy and information.
Claims (8)
1. the synchronous transmission system of an energy and information, is characterized in that: comprise a direct current power supply, a direct current bus and energy information transmission unit some and that corresponding load is connected; Described DC power supply and energy information transmission unit all are connected on described DC bus;
Described energy information transmission unit comprises:
The Boost circuit, flow to load after the direct current on DC bus is boosted, and produce harmonic signal to DC bus;
Sample circuit, the status signal of collection load;
Carrier detecting circuit, receive from DC bus the harmonic signal that other energy information transmission units produce, and this harmonic signal is carried out to outgoing carrier signal after filter and amplification;
Control circuit, carry out successively analog-to-digital conversion and analyze identification described carrier signal or status signal, according to recognition result, constructs switching signal;
Drive circuit, carry out power amplification to described switching signal, and utilize the switching signal after power amplification to be controlled the switching tube in the Boost circuit.
2. the synchronous transmission system of energy according to claim 1 and information, it is characterized in that: described Boost circuit comprises an inductance, an electric capacity and two switching tubes; Wherein, an end of inductance is connected with DC bus, and the other end is connected with the drain electrode of second switch pipe with the drain electrode of the first switching tube; The source electrode of second switch pipe is connected with an end of electric capacity and an end of load; The source electrode of the first switching tube is connected with the other end of the other end of electric capacity and load and ground connection; Switching signal after the power amplification of the grid reception drive circuit output of the first switching tube or second switch pipe.
3. the synchronous transmission system of energy according to claim 2 and information, is characterized in that: the switching signal complementation that described the first switching tube and second switch pipe receive.
4. the synchronous transmission system of energy according to claim 1 and information, it is characterized in that: described DC power supply is connected on DC bus by impedance matching network.
5. the synchronous transmission system of energy according to claim 4 and information, it is characterized in that: described impedance matching network comprises an inductance, an electric capacity and a resistance; Wherein, an end of inductance is connected with the positive pole of DC power supply, and the other end is connected with an end of electric capacity; The other end of electric capacity is connected with an end of resistance, and the other end of resistance is connected with the negative pole of DC power supply and ground connection.
6. the synchronous transmission system of energy according to claim 1 and information, it is characterized in that: described control circuit is connected with man-machine interface.
7. the synchronous transmission system of energy according to claim 1 and information, it is characterized in that: described control circuit is according to recognition result, by duty ratio or switching frequency adjustment are constructed to corresponding switching signal; Wherein:
For Energy Transfer, make the switching frequency of switching signal constant, adjust the duty ratio of switching signal;
For communication, make the duty ratio of switching signal constant, adjust the switching frequency of switching signal in each chip period.
8. according to the synchronous transmission system of claim 1,6 or 7 described energy and information, it is characterized in that: described control circuit is DSP.
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| CN103368609B (en) * | 2013-06-21 | 2015-02-04 | 浙江大学 | Coupling inductance-based power signal composite transmission system |
| CN104065336B (en) * | 2014-06-25 | 2016-04-06 | 浙江大学 | A kind of photovoltaic optimizer of integrated data communication function |
| CN106331563B (en) * | 2016-10-19 | 2019-07-16 | 苏州纽克斯电源技术股份有限公司 | A kind of data-signal and the conllinear Transmission system of DC power supply and method |
| CN109474555A (en) * | 2018-10-22 | 2019-03-15 | 哈尔滨工业大学 | Wireless energy and data synchronous transmission system and its Parameters design based on inductive coupling and FSK modulation |
| CN116547881A (en) * | 2021-10-20 | 2023-08-04 | 杭州禾迈电力电子股份有限公司 | Shutoff device, communication method of shutoff device and quick shutoff photovoltaic system |
| CN116827385B (en) * | 2023-07-03 | 2024-03-22 | 华北电力大学（保定） | Power information fusion device for DC-DC converter power control loop disturbance |
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| US6970072B1 (en) * | 2003-05-29 | 2005-11-29 | Smarthome, Inc. | Home automation module having externally powered communications port |
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| CN101719726A (en) * | 2009-12-04 | 2010-06-02 | 重庆大学 | Method and device for non-contact type synchronous transmission of energy and signal |
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| WO2006090675A1 (en) * | 2005-02-25 | 2006-08-31 | Mitsubishi Denki Kabushiki Kaisha | Power converter |
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| CN1362614A (en) * | 2002-01-21 | 2002-08-07 | 南京航空航天大学 | Rotary non-contact bidrectional synchronous signal and power transmitting system and method |
| US6970072B1 (en) * | 2003-05-29 | 2005-11-29 | Smarthome, Inc. | Home automation module having externally powered communications port |
| JP2006090675A (en) * | 2004-09-27 | 2006-04-06 | Mitsubishi Electric Corp | Controller for hot air type heater |
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