Smart Grid Solutions Guide - Maxim

More documents

Recommendations

Info

CommunicationsRecommended solutionsRecommended solutions (continued)Part Description Features BenefitsRS-485 transceiversMAX13442E Fault-protected RS-485 transceiver ±80V fault protection; ±15kV ESD protection Eliminates external circuitryMAX13485EMAX3535EMAX13412E/13ERS-485 transceiver with enhanced ESDprotectionIsolated RS-485 transceiver with enhancedESD protectionRS-485 transceivers optimized for isolatedapplications±15kV ESD protection; fail-safe circuitry;hot-swappableRobust ±2.5kV capacitive isolationAutoDirection circuitry; integrated LDOSaves space and provides robust protectionEliminates external optocoupler and power supplyMinimize solution sizeMAX13430E RS-485 transceiver for multivoltage systems Integrated low-voltage logic interface Interfaces directly to low-voltage FPGAs andASICs, eliminating level translatorTransformer driversMAX2531W primary-side transformer H-bridge driverfor isolated suppliesSimple solution for producing an isolated powersupply up to 1WSimple open-loop circuit speeds PSU design,allowing faster time to marketMAX2563W primary-side transformer H-bridge driverfor isolated suppliesSimple solution for producing an isolated powersupply up to 3WSimple open-loop circuit speeds PSU design,allowing faster time to marketPower amplifierMAX22351W autoramping power amplifier for 900MHzapplications+30dBm (1W) typical output power from a 3.6Vsupply or +28dBm from a 2.7V supplyMaximizes read range; operates directly from asingle 2.7V to 5.5V supply, making it suitable foruse with 3-cell NiCd or 1-cell Li+ batteriesDC-DC regulatorMAX15062*36V, 300mA DC-DC regulator with integratedMOSFETLow quiescent current; 2mm x 2mm TDFNpackageHigh integration with small footprint saves upto 50% total board area compared to competingsolutionsAnalog-to-digital converters (ADCs)MAX11103/05 12-bit, 3Msps/2Msps SAR ADCs 73dB SNR; SPI interface; high 1.7MHz full linearbandwidth; 1-channel (SOT23) and 2-channel(μMAX®, TDFN) optionsMAX1379/8312-bit, 1.25Msps, 4-channel, simultaneoussamplingSAR ADCs0 to 5V, 0 to 10V, or ±10V inputs; 70dB SNR;four single-ended or two differential inputs;SPI interfaceTiny SOT23, μMAX, and TDFN packagessave space; serial interface simplifies datatransmissionSerial interface saves cost and space on digitalisolatorsFor a list of Maxim's recommended smart grid communications solutions, please go to: www.maxim-ic.com/communications.40 Maxim Smart Grid Solutions
Energy measurementOverviewEnergy measurementOverviewEnergy demand around the worldis predicted to increase at a ratethat will likely outstrip our abilityto generate it. Estimates by the U.S.Department of Energy forecast totalenergy consumption in the U.S. toincrease by 30% to over 5,000 billionkWh in 2035, while new plannedgeneration (including renewablesources) is expected to grow only22% during this period. Increasedenergy efficiency and improvedenergy management are critical toaverting this potential energy crisis.Traditional open-loop strategies formanaging power usage are crudeand inefficient, resulting in lowerreliability and reduced distributionstability. Engineers are workingto improve power efficiency in allelectronic applications—commercialequipment, home appliances,industrial motors, and networkequipment. Increasing efficiency,however, is only part of the equation.Better energy management and,consequently, comprehensivemeasurement systems are essential.Incorporating feedback abouthow power is consumed yields thebenefits of a closed-loop system andreduces waste. Additionally, givingenergy users greater visibility intotheir power consumption can helpovercome consumer indifference toenergy concerns.Accurate measurement provides thefeedback necessary to understand,confirm, and modify our powerconsumption. It is critical to implementingan energy-managementcontrol loop and providing insight formaintenance and failure diagnostics.This chapter addresses two keyareas that benefit from new energymeasurementtechnologies: residential/commercial point of loads (POLs) anddata centers.Measuring point-of–loadefficiencyIntelligent power-managementschemes require accurate energymeasurement, not only at anaggregate level (e.g., an entirebuilding) but also at the POL (e.g.,air conditioner, lighting, dishwasher,or computer).Smart meters can track time-of-daypower consumption and enableutilities to offer incentives toconsumers to change their usagepatterns. To improve automationwe need to equip consumers withchoices and enhanced services.Individual POLs must be tied to alocal data and control network thatmonitors and allows control of thevarious loads within a buildingor household. Services can beenhanced through power-qualitymeasurements and usage statistics,which can be used to schedulemaintenance. Such a network canbe implemented using a wide varietyof configurations and protocols,depending upon the application.A local data and control network thatincludes accurate power measurementcan enable significant costsavings by identifying how power isbeing used. Consumers who can seethat running the air conditioner costs$200/month (value of use) or quantifythe cost difference between runningthe dryer at noon instead of 7 p.m.(time-value of use) are more likely tochange their usage patterns.Data that used to be acquired byexpensive high-end utility meters isnow available for an order-of-magnitudeless cost. Power factor (PF),harmonic distortion, active power(watts), and apparent power (VA)information can be readily availablefor optimizing power-delivery501.00501.004545WATTS (GREEN) AND VA (BLUE)403530252015100.750.500.25POWER FACTOR (RED LINE)WATTS (GREEN) AND VA (BLUE)403530252015100.750.500.25POWER FACTOR (RED LINE)550SECONDS00SECONDS0Figure 1. The power profile of a laptop computer during power-up, steady-state, and power-down using two different plug-in power supplies.www.maxim-ic.com/smartgrid 41
Page 5 and 6: Smart Grid Solutions GuideTable of
Page 7: Smart Grid Solutions GuideIntroduct
Page 11 and 12: Smart metersOverviewby using higher
Page 13 and 14: Smart metersFeatured productsEnergy
Page 15 and 16: Smart metersFeatured productsEnergy
Page 17 and 18: Smart metersRecommended solutionsRe
Page 19 and 20: Power-grid monitoringOverviewPower-
Page 21 and 22: Power-grid monitoringOverviewAdditi
Page 23 and 24: Power-grid monitoringFeatured produ
Page 29 and 30: Power-grid monitoringRecommended so
Page 31 and 32: CommunicationsOverviewCommunication
Page 33 and 34: CommunicationsOverviewOUTSIDE THE W
Page 35 and 36: CommunicationsOverview• Adaptive
Page 38 and 39: CommunicationsFeatured productsWi-F
Page 40 and 41: CommunicationsFeatured products260M
Page 42 and 43: CommunicationsFeatured productsRF e
Page 44 and 45: CommunicationsFeatured productsHigh
Page 48 and 49: Energy measurementOverviewbudgets,
Page 50 and 51: Energy measurementFeatured products
Page 52 and 53: Energy measurementFeatured products
Page 54: Legal noticesTrademark information4

Smart Grid Solutions Guide - Maxim

Create successful ePaper yourself

Delete template?

Save as template?