[introduction] 1kW AC/DC power source is very common in a lot of application, what the user wants is OK of relaxed installation, configuration and monitoring muti_function product. How do the use that the article will discuss good power supply and product of explanatory give typical examples satisfy a requirement.

The power source of AC input facility of 1kW level is the main force of the many domains such as industry, telecommunication, traffic and medical treatment. Power source manufacturer provides more function for oneself AC/DC product hard, monitor and control function, but meanwhile the client also is faced with should let them ” disappear ” pressure. Power source of user hope facility is smaller, lighter quieter also, go up or look from hearing with the angle of EMI. They should keep cool when next high output is laden moving, won’t increase too much quantity of heat to the system, and be in bide his time or close the dissipation when machine should can ignor, even cost also should moderate. In the meantime, systematic engineer does not hope ” small size ” bring about an operation to be restricted somewhat (for example height) and cause any not happy the accident that see, purchase department also hopes a component can be applicable a variety of attestation that apply and have different application place to need.

Come a deep breathing

The design group of AC/DC is sucked greatly together at a heat, the pencil that takes them (perhaps touch accuse a pen) , thousands of design that begins to consider to must be made is decision-making. These choices conflict each other normally and drag in arrives multinomial course setting, arrive from circuit theory accordance of safe, EMC, magnetics, mechanical, cooling, aesthetic, standard is waited a moment. Always have in the contemporary design of level of this kind of power embedded the digital element of firmware (digital part) , because skill of this process designing becomes another essential factor that needs conformity. This is urgent need conformity, and product management may because of answering demand changes specification, because this project management is not,be a main least of all subject.

The hope arises in the place of division of understanding AC/DC products plan a few after sympathizing with, now we with RECOM RAC1200-V series (graph 1) the example that serves as successful conformity, will research this product is how to be passed newest upgrade get farther improvement. This AC/DC converter moves below general 80-264VAC, offer the 24V that has wide adjusting range, 36V or 48V sheet to output, permanent power is 1kW, typical efficiency is 95% .

Graph 1: Converter of RECOM RACM1200-V 1kW AC/DC (1.2kW peak value)

Small enclose contain great ability

The integral dimension of RACM1200-V is millimeter of 228 X 96.2 X 40 (9 X 3.8 X 1.57 inch) , accorded with project of the first target. This is one of products with highest density of the rated power on the market, suit height of 1U standard frame (1U = 1.75 inch) . Communication input and dc output are located in two end convenient join, in-house and efficient distribution. If want,achieve alleged rated output however, refrigeration and dimension must consider together. In the representative application of these products, stem from safeguard and the reason interior fan such as noise is undesirable, the carbon fin that accordingly this product uses independence and compulsive wind are cold. Although we talk about the 1kW application that is a model, but product component date gave out to hint: In formulary time Duan Neifeng is worth rated power to be able to come 1200W or offer continuously below refrigeration of measurable 2.5m/s air current, motherboard temperature is highest 85 ° C. To achieve specific power output can accept or reject somewhat: The duration of voltage of input of environmental temperature and cold wall temperature, air current, communication and peak value power, RECOM provided the integrated guide that can come true in product data table. The repetition rate that a parameter that often lacks in norms is peak value rated power, because,needing a paragraph of cooling time is such temperature won’t as many successive peak value load ” rise ” exorbitant. The relevant guide that RECOM provides is shown 2 times like the graph.

Graph 2: The ability of peak value load that RACM1200-V quantifies

Rigid control maintains power supply inside safe limits

Be aimed at versatility and RACM1200-V is designed, its temperature data can let an user be extracted below specific requirement most high-power, avoid to choose the AC/DC of costlier, bigger, higher rating thereby. Through overall protection the mechanism can avoid to create pressure to the product, what carry in the light of Xiaoguo for instance is constant the nicety below power mode flows too detect, return preserving to decide electric current, and circulate finally before closedown biquadratic ” belch ” type closes (graph 3) , also had had lukewarm protection and output to press protection too at the same time.

Graph 3: RACM1200-V implemented multiple overload and restriction of peak value load

This product is returned inside buy a lot of flexibility, protect level to you can be passed for example inside the PMBus of buy? Interface undertakes adjustment. Even overheat protection also has classification, carry out to primary switch instantly ” hard ” shut, adopt to exporting component ” elegant ” shut. If temperature continues to lift, power source can reduce output power at the beginning most and the warning is issued before final safety is shut.

The course of digital intelligence firmware of RACM1200-V upgrades considerably, below the voltage of communication town report that measures in much dot and condition of temperature substandard ministry, product can demand of power of monitoring of significant real time undertakes allocating. This is to let an user be used so that set one’s mind at, won’t afraid product can damage or get power too big and shorten service life. To help this issue further, terminal system installed output of drive of a fan, pass through ” revolution counter ” signal monitoring speed and condition. Adjusted as a result of fan speed temperature, because this can reduce waste,fall noise to lowest.

PMBus offers extra monitoring and control, because this RACM1200-V is OK and compositive to SCADA (monitoring and data are collected) or in system of intelligent report source control. Safe imitate is controlled and was not forgotten quickly however, the warning is issued before because also have long-range induction, switch control and ACOK signal,maintaining time to end with be being mixed after breakdown of alternating current source. PSU GOOD signal is used inform output to be in the standard, offer ” uninterrupted ” 5V 1A bides his time output, with advocate there is 1.5kV segregation between output. The fan drive output that has mentioned can be set beforehand to shut or be between 5V and 12V, rated electric current is 1A. To increase result of a few visions, RGB LED represents 7 kinds of different PSU state with the successive, combination that twinkle and twinkles alternately:

This product has high accuracy control to apply to a variety of laden types accordingly. For example, electric function bears tall surge is pounded constant current of the buy inside benefit from benefit from is characteristicly. Batteries charges is additionally one kind of application; Plumbic acerbity batteries still is used extensively and charge with constant current constant voltage, and the control function of RACM1200-V can realize afore-mentioned functions.

If the product returns the requirement that cannot satisfy you, most and OK paralell connection enhances rated power 3 times. Sharing electric current is to pass ” flagging law ” accomplish in order to ensure every power source provides average electricity.

Different application needs different standard accordance

We had discussed this product how to get used to different laden type through overall control and monitoring. The application that differs however also needs specific standard accordance, and so called muti_function AC/DC must be gotten satisfy these requirements. The lowermost requirement of contemporary product is the attestation that should have IT and multimedia standard IEC/EN/UL 62368-1, RACM1200-V accords with altitude of this standard job 5000 meters, at the same time it still accords with the safe level IEC/EN 61558-1/2 of transformer and power source device, and measure, the safe requirement IEC/EN 61010-1/2 that control and lab use electric device, height above sea level 4000 meters. The II that the rated overvoltage category of this product is IEC 62368-1 and IEC 61010-2 kind (the III of OVC II) and IEC 62477 kind (OVC III) , height above sea level can amount to 2000 meters, because this component can be installed,be in the environment of noise having report. The product also accords with zoology to design a requirement, typical sky carries power comsumption to be 2W, bide one’s time power comsumption most greatly 1W.

However attestation not merely hereat, the product still accords with IEC/EN ANSI-AAMI 60601-1 of medical treatment standard. Need not worry because this product satisfies requirement of highest and current level,can have additional problem, 250VAC system has double patient safeguard (2x MOPP) altitude is as high as 4000 meters. The standard of this level asks to keep apart voltage to be 4kVAC, offer double input fusing at the same time. In medical treatment application, power source leakage current is restricted, the product falls in normal condition (NC) patient leakage current is highest 100 μ A, in onefold breakdown condition (below SFC) highest it is 500 μ A. Accordingly this product can with inside buy BF (the body is isolated from) join is used together, can mix in the hospital nurse in the environment by wide application.

The output segregation of box is 1.5kVAC, because this product has an opportunity,be needed the aether net power supply of this segregation grade (the application of PoE) is used.

The product accords with multinomial EMC standard, include IEC/EN 60601 B kind the B of EMC radiate standard and EN 55011, EN55032 and FCC 47 CFR Pt 15 kind standard. Level of immunity to interference accords with standard of IEC/EN 61000 series, the requirement that satisfies standard of the EN 55035 that is aimed at multimedia and industrial equipment respectively and EN 55024 at the same time.

For The Geeks

RACM1200-V achieves the remarkable success of density of high-end norms, high power and versatility with substantial price. Used newest changeover technology to realize this one target to design staff, include PFC of crisscross step up and the most advanced LLC segregation and changeover. This kind of syntonic develop attacks the means of implementation adjustment is the frequency that passes weaveform of change power drive in order to be in the response of syntonic antrum fluctuates on the curve gain of class of circuit of mobile, change and output voltage, through output feedback undertakes imitate is controlled. Output rectifier to achieved highest efficiency to use active synchronism. Although control loop feedback is simulative, but communication interface of small controller processing, exterior control and monitoring. Interior and power source of exterior and auxiliary control are offerred by power source of AC/DC of another low power (graph 4) .

Graph 4: RACM1200-V block diagram

Want installation to be forgotten namely really?

The design of RECOM RAC1200-V uses forward position technology, but because its are characteristic in the with the requirement to the user corner that is put in the room. It has general input limits, comprehensive attestation and safe function, very easy and compositive in any common application. New modular the logic that firmware has clarity is configured easily accordingly, manufacturer be able to apace offers calm goods to give a client. Install it but do not forget it, constant green light states it is working reliably quietly. Because it does not need,nevertheless too much attention may feel a bit doleful so, you are OK now and then send a PMBus to inquiry lets it know you or care it very much.

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