[introduction]How does the article pass the introduction odd logarithm to transmit electric power according to the line. Be opposite through new-style sheet aether net power supply(SPoE)But beyond distance transmits electric power and data. Setting of system of article general specification and how be cable power supply. The article supports the introduction this kindSPoEThe framework of the solution and independent integrated circuit.

Summary

How does the article pass the introduction odd logarithm to transmit electric power according to the line. Be opposite through new-style sheet aether net power supply (SPoE) is OK remote transmission electric power and data. Setting of system of article general specification and how be cable power supply. The article supports the introduction the framework of solution of this kind of SPoE and independent integrated circuit.

Remote transmission electric energy (it is for example inside the factory) be not easy thing. Of course, electrician can be in any positions of the manufactory join equipment and electrified wire netting. However, this is very time-consuming and cost is very high.

Come for years, aether net power supply (PoE) is replacement scheme of connective of independent electrified wire netting all the time. PoE of have the aid of, can provide the power that is as high as 71 W to equipment (transmission distance achieves 100 meters) . PoE uses the cable of double skeining thread of Cat 5 and higher standards, support a lot of already the application that cloth sets aether net cable.

A kind of PoE technology that the name is SPoE also applies to crewel cable, offerred a kind of new alternative. Use SPoE, through a crewel cable can transmit the power that is as high as 52 W. Transmission distance can is as long as 1 kilometer. A lot of factories already used crewel cable at 4 MA to apply to 20 MA. Can use easily at SPoE likewise. If do not have existing wiring, although do not have electrical engineering help, also can add new wiring easily.

Like PoE, SPoE can transmit data already, also can transmit electric power. This are very important, because long-range electron equipment needs power source and data link normally. Graph the circumstance of module of 1 indication T1L PHY.

Graph 1.SPoE system can transmit the power that is as high as 52 W.

If transmit electric energy only, why should use SPoE technology? SPoE is technology of an IEEE standardization, as compatible as the SPoE hardware that comes from all sorts of different manufacturer, offer comprehensive systematic telemetering (use at monitoring capabilities to transmit condition, detect breakdown) , had offerred press protection and segregation of road of ground connection annulus.

SPoE solution needs facility of a power supply (PSE) controller gets electric equipment with (PD) controller, former it is a kind of circuit that transmits electric energy through crewel cable, latter receives energy from crewel cable. The graph is shown 1 times join to the dot for the dot. Also can undertake astral form and chrysanthemum catenary join. If use existing cable, can reduce the cost that new wiring place requires circuit and workload.

PSE controller is to be many passageways normally (cable) of the design. This to be many long-range parts of an apparatus (namely sensor) the system of power supply is crucial. For example, the LTC4296-1 of ADI company can be 5 laden power supply (graph 2) . Line of every power supply can be as long as 1000 meters.

Controller of graph 2.LTC4296-1 SPoE PSE suits drive to reach 5 channels.

Graph the 3 block diagram that show the PD receiver circuit that uses LTC9111. Carry crewel cable power supply. PD circuit is in charge of be being transmitted to circuit undertake classification and monitoring. Decide the power social estate that electric energy transmits through classification. If move the voltage beyond 24 V of electric equipment need or 55 V, need to use additional DC-DC converter.

Graph 3. Deploy the PD of DC-DC converter downstream.

Besides SPoE, still have data line power supply (PoDL) technology. These two kinds of techniques are very similar. The working voltage of SPoE is 24 V or 55 V, the bridge receives a distance to be able to amount to 1000 meters, and PoDL is used at stone’s throw (15 rice or 40 meters) system, working voltage is 12 V, 24 V or 48 V. PoDL basically is used at car domain and similar application (if build facility) . SPoE basically is used at industrial environment.

Have the aid of a few clever way, can carry power supply of crewel cable safety. Can realize high-power application so (like brim intelligence) , the industrial establishment wiring with existing put sb in a very important position still can reduce cost.

(origin: ADI company, author: Frederik Dostal, expert of power source administration)

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