CN201742296U - Power communication line multiplexing circuit based on forward topology - Google Patents
Power communication line multiplexing circuit based on forward topology Download PDFInfo
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- CN201742296U CN201742296U CN2010202276704U CN201020227670U CN201742296U CN 201742296 U CN201742296 U CN 201742296U CN 2010202276704 U CN2010202276704 U CN 2010202276704U CN 201020227670 U CN201020227670 U CN 201020227670U CN 201742296 U CN201742296 U CN 201742296U
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Abstract
The utility model discloses a power communication line multiplexing circuit based on forward topology. The multiplexing circuit comprises a power supply, a transformer and an output circuit, wherein the transformer and the output circuit are connected with the power supply. The multiplexing circuit is characterized in that: an input winding (1) end of the transformer and a connecting line of a direct current power supply (16) connected in series with a metal-oxide-semiconductor field effect transistor (MOSFET) switch tube (15) are designed into a remote communication line; an output winding (3) of the transformer is connected in series with a reset winding (2) and is also connected with a data reading circuit (A) and a data transmitting circuit (B); and the data reading circuit and the data transmitting circuit are connected with a control unit digital signal processor (DSP) (10). The circuit has the advantages of realizing the functions of feeding data back to a multiplexing bus and reading data, realizing multi-machine communication, realizing power isolation and feeding magnetic resetting energy back to a load side at every period by arranging a magnet reset winding.
Description
Technical field
The utility model relates to a kind of forward converter, particularly a kind of power supply communication multiplex circuit that possesses remote power-feeding, communication dual-use function.
Background technology
In the new forms of energy research field, in order to guarantee the safe and reliable operation of micro power network, the inverter unit that comprises in the micro power network, load unit, energy-storage units all need independently control circuit, and this just relates to the problem of how to give these control circuits power supplies.Simultaneously, between each control unit and with the upper strata control unit between also need necessity communicate by letter.Generally, for a perfect micro power network, need to give each control unit that power line is provided, ground wire and sending and receiving data wire need four lines at least, and cost is higher, and control circuit can be altogether like this, and security reliability is low.
Summary of the invention
The purpose of this utility model provides a kind of power supply order wire multiplex circuit based on forward topology, and this circuit can be finished to multiplex bus feedback data and function of reading data, realizes multi-computer communication; Realize isolated from power, and this circuit by being set, the magnetic reset winding is fed to load-side with the magnetic reset energy in each cycle.
The purpose of this utility model is achieved through the following technical solutions, a kind of power supply order wire multiplex circuit based on forward topology, comprise power supply and the transformer and the output circuit that link to each other with power supply, it is characterized in that: the input winding terminal of described transformer is set to the telecommunication line with the connecting line that is serially connected with the DC power supply of switch mosfet pipe; On the output winding of transformer, be serially connected with a magnetic reset winding; And be connected with data reading circuit and data transmit circuit at this transformer output winding terminal; Data reading circuit, data transmit circuit also link to each other with control unit DSP.
Described telecommunication line length is 500～1000m.
Described magnetic reset winding is connected in series a diode, and this diode also links to each other with the electric capacity of output circuit.
Described data reading circuit comprises divider resistance, comparator and reference voltage, and two divider resistances are serially connected on the transformer output winding voltage test point, and comparator is connected between two divider resistances, and comparator output terminal links to each other with control unit DSP; Reference voltage is connected on the comparator.
Described data transmit circuit comprises PNP triode and PNP triode, and the PNP triode is connected on the electric capacity of transformer output winding and output circuit; The PNP triode is connected on the PNP triode, and links to each other with control unit DSP.
Be connected with the voltage stabilizing chip between described transformer output winding and the control unit DSP.
Be connected a biasing resistor respectively between described PNP triode, PNP triode base stage separately and the emitter.
Be connected with 1-5 power supply order wire multiplex circuit on the telecommunication line of the described DC power supply that is serially connected with the switch mosfet pipe.
The utility model is subjected to the inspiration of forward converter, has proposed a novel power supply, communication multiplex circuit, realizes isolated from power simultaneously.The operation principle of the positive exciting switching voltage regulator of the utility model utilization, the transformer of single-end ortho-exciting Switching Power Supply and output thereof be installed in be powered near the unit, input DC power and switching tube then can be installed in the strange land, by drawing two data power supply multiplex bus, can give a plurality of slave power supplies.In micro power network system, utilize this power supply technique, only need the connection of two lines between the control unit.Data by control isolating transformer output winding side send simultaneously, read circuit, can finish to multiplex bus feedback data and function of reading data, realize multi-computer communication.The magnetic reset winding of transformer then can be fed to load-side in each cycle with the magnetic reset energy.
Description of drawings
Fig. 1 is a power supply communication principle of multiplexing circuit diagram; Fig. 2 is a multimachine power supply communication topology schematic diagram.
Among the figure: 1, input winding; 2, magnetic reset winding; 3, output winding; 4, divider resistance; 5, comparator; 6, reference voltage; 7, a PNP triode; 8, the 2nd PNP triode; 9, voltage stabilizing chip; 10, dsp controller; 11, control data output pin; 12, judge the input data pin; 13, power supply port; 14, transformer output winding voltage test point; 15, switch mosfet pipe; 16, DC power supply.
Embodiment
Below by specific embodiment to circuit of the present utility model: power supply, data read, data send, the realization of magnetic reset function is described further.
As shown in Figure 1, should be based on the power supply order wire multiplex circuit of forward topology, comprise power supply and the transformer and the output circuit that link to each other with power supply, wherein: input winding 1 end of transformer and the connecting line that is serially connected with between the DC power supply 16 of switch mosfet pipe 15 are set to the telecommunication line, and the telecommunication line length is 500～1000m; The present embodiment optimum length is 1000m.
The utility model and increased a magnetic reset winding 2 at original forward topology circuit transformer output, and on output circuit in parallel a data reading circuit A and a data transtation mission circuit B; And the output of this data reading circuit A and data transmit circuit B links to each other with control unit DSP 10.One voltage stabilizing chip (7805) 9 is set between transformer output and control unit DSP 10, the input of this voltage stabilizing chip (7805) 9 links to each other with the output capacitance in the output circuit is anodal, output links to each other with the power supply port 13 of control unit DSP10, and earth terminal links to each other with the negative pole of output capacitance.
Diode of magnetic reset winding 2 serial connections in the foregoing circuit, this diode cathode links to each other with the different name end of magnetic reset winding 2, and negative pole links to each other with the positive pole of output capacitance.
Wherein, data reading circuit A comprises divider resistance 4, comparator 5 and reference voltage 6, two divider resistances 4 are serially connected on the transformer output winding voltage test point 14 of transformer output winding 3 ends of the same name, the negative terminal input of comparator 5 is connected between two divider resistances 4, the anode input links to each other with reference voltage 6, and the output of comparator 5 links to each other with the judgement input data pin 12 of control unit DSP 10.
Data transmit circuit B comprises PNP triode 7 and PNP triode 8, the collector electrode of PNP triode 8 is connected the end of the same name of transformer output winding 3 by collector resistance, emitter links to each other with the capacitance cathode of output circuit, is connected a biasing resistor between PNP triode 8 emitters and the base stage.PNP triode 7 emitters are connected on PNP triode 8 base stages, PNP triode 7 collector electrodes pass through grounding through resistance, base stage links to each other with the control data output pin 11 of control unit DSP 10 by base resistance, is connected a biasing resistor between PNP triode 7 emitters and the base stage.
As shown in Figure 2, be connected with 1-5 remote power supply communication circuit on the telecommunication line of the described DC power supply 16 that is serially connected with switch mosfet pipe 15, present embodiment has provided and has been connected with 3 power supply order wire multiplex circuits on the telecommunication line.
Operation principle of the present utility model is: 1 power supply is 1/4 drive waveforms to 15 1 fixed duty cycles of switch mosfet pipe among Fig. 1, make that DC power supply 16 is 1/4 voltage waveform in duty ratio of transformer input winding 1 generation, on output winding 3, induce the voltage waveform of same duty cycle simultaneously, and produce a more stable voltage at the input of voltage stabilizing chip (7805) 9.Can allow this voltage between 5V～18V by regulating DC power supply 16, guarantee that voltage stabilizing chip 9 produces stable 5V voltage and gives power supply port 13 power supplies.The magnetic reset energy that magnetic reset winding 2 provides can be fed to the input side of voltage stabilizing chip 9, makes it be equilibrated at a voltage range.Can not surpass given range as long as guarantee the fluctuation of this voltage, just can guarantee the stable power-supplying of dsp controller 10.
2 data are sent in when sending data bit " 1 ", second 1/4 cycle in switch periods puts output pin 11 low, PNP triode 7 and PNP triode 8 can be open-minded in succession, and at this moment the input side of voltage stabilizing chip 9 produces a high level to transformer output winding voltage test point 14 feeds.This high level just is delivered on the power supply order wire multiplex bus by transformer like this, can be read by other unit.
3 data read transformers output winding voltage test point 14 has connected divider resistance 4, is set to 5V by their mid-point voltage high potentials of design divider resistance resistance, and this mid-point voltage compares by comparator 5 and reference voltage 6.Can judge that by comparator 5 output results transformer output winding voltage test point 14 is high potential or electronegative potential; Control unit DSP 10 reads the value of judging input data pin 12 in second 1/4 cycle of each switch periods, thereby the data of knowing this switch periods representative are " 1 " or " 0 ".
4 magnetic reset magnetic reset times accounted for the back half period of each switch periods.When switching tube 15 disconnections, when PNP triode 8 ended, magnetization energy can discharge by the winding that resets during this period of time.Be used to prevent that transformer is saturated so on the one hand, on the one hand energy feeding arrived load.It is because under the condition of telecommunication that magnetic reset winding 2 does not have to be connected to the input power positive end like that with traditional normal shock, and energy produces transfer of data easily simultaneously and disturbs to power supply feedback meeting increase line loss.
Claims (8)
1. power supply order wire multiplex circuit based on forward topology, comprise power supply and the transformer and the output circuit that link to each other with power supply, it is characterized in that: the connecting line that the DC power supply (16) of switch mosfet pipe (15) was held and be serially connected with to the input winding (1) of described transformer is set to the telecommunication line; On the output winding (3) of transformer, be serially connected with a magnetic reset winding (2); And be connected with data reading circuit (A) and data transmit circuit (B) at this transformer output winding (3) end; Data reading circuit (A), data transmit circuit (B) also link to each other with control unit DSP (10).
2. a kind of power supply order wire multiplex circuit based on forward topology according to claim 1, it is characterized in that: described telecommunication line length is 500～1000m.
3. a kind of power supply order wire multiplex circuit based on forward topology according to claim 1 is characterized in that: described magnetic reset winding (2) serial connection one diode, this diode also links to each other with the electric capacity of output circuit.
4. a kind of power supply order wire multiplex circuit according to claim 1 based on forward topology, it is characterized in that: described data reading circuit (A) comprises divider resistance (4), comparator (5) and reference voltage (6), two divider resistances (4) are serially connected on the transformer output winding voltage test point (14), comparator (5) is connected between two divider resistances (4), and comparator (5) output links to each other with control unit DSP (10); Reference voltage (6) is connected on the comparator (5).
5. a kind of power supply order wire multiplex circuit according to claim 1 based on forward topology, it is characterized in that: described data transmit circuit (B) comprises PNP triode (7) and PNP triode (8), and PNP triode (8) is connected on the electric capacity of transformer output winding (3) and output circuit; PNP triode (7) is connected on the PNP triode (8), and links to each other with control unit DSP (10).
6. a kind of power supply order wire multiplex circuit based on forward topology according to claim 1 is characterized in that: be connected with voltage stabilizing chip (9) between described transformer output winding and the control unit DSP (10).
7. a kind of power supply order wire multiplex circuit based on forward topology according to claim 5 is characterized in that: be connected a biasing resistor respectively between described PNP triode (8), PNP triode (7) base stage separately and the emitter.
8. a kind of power supply order wire multiplex circuit based on forward topology according to claim 1 is characterized in that: be connected with 1-5 power supply order wire multiplex circuit on the telecommunication line of the described DC power supply (16) that is serially connected with switch mosfet pipe (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202276704U CN201742296U (en) | 2010-06-17 | 2010-06-17 | Power communication line multiplexing circuit based on forward topology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202276704U CN201742296U (en) | 2010-06-17 | 2010-06-17 | Power communication line multiplexing circuit based on forward topology |
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| CN201742296U true CN201742296U (en) | 2011-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202276704U Expired - Fee Related CN201742296U (en) | 2010-06-17 | 2010-06-17 | Power communication line multiplexing circuit based on forward topology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867292A (en) * | 2010-06-17 | 2010-10-20 | 西安交通大学 | Remote power supply communication circuit based on forward topology |
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2010
- 2010-06-17 CN CN2010202276704U patent/CN201742296U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867292A (en) * | 2010-06-17 | 2010-10-20 | 西安交通大学 | Remote power supply communication circuit based on forward topology |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20120617 |