User Manual: ECT 310 Perpetuum Module
Contents
1. 2 6 Mechanical integration of Peltier elements Peltier elements can be used as thermo electrical generators A temperature difference be tween the two plates of a Peltier element generates electrical power e g to drive electronic circuits Low cost Peltier elements provide at small temperature differences an output vol tage of a few mV only Therefore this ultra low voltage DC DC converter is required to boost the small output voltages to a voltage gt 3 V as required for standard electronic cir cuits With a start up voltage of 20 mV the ECT 310 is currently the best component in class The next figure illustrates typical integration of such a Peltier element The efficiency of energy generation depends on the thermal transfer resistance between the hot and cold sides of the Peltier element It is consequently necessary to ensure good thermal insulation of the two ceramic wafers for instance by using suitable plastic or styrofoam Please note the following e Use thermal compound The compound must be temperature resistant should be attached carefully and take care that the layer of compound is thin homogeneous and contains no air bubbles e In use of a heat sink for natural convection it should be noted that the effective thermal resistance depends on heat sink geometry and the heat flow of surrounded air 2012 EnOcean www enocean com ECT 310 User Manual Page 13 20 P M enocean e The efficiency of the Peltie2. USER MANUAL V1 4 Green Smart Wireless enocearr Covered by at t following patents W098 36395 DE 10155125 W 000 043802 EP 1550202 US DE 10256940 D 0025561 DE10062028 DE 10150128 DE 10063305 DE 10301678 DE29712270 3 DE 202004005837 5 EP 1389358 US 7 005 778 B2 7 019 241 B2 DE 10256942 8 DE 10256942 8 E 10315765 DE 10315765 Further patents pending http www enocean com en patents EnOcean GmbH Phone 49 89 67 34 689 0 Subject to modification Kolpingring 18a Fax 49 89 67 34 689 50 ECT 310 User Manual 82041 Oberhaching info enocean com January 17 2012 Germany www enocean com Page 1 20 USER MANUAL Green Smart Wireless enocearr ECT 310 PERPETUUM REVISION HISTORY The following major modifications and improvements have been made to the first version of this document Major Changes Initial version Major changes I O diagram in Chapter 1 3 added Physical PCB dimensions changed in Chapter 1 5 no side bulges in series production Evaluation board connecting corrected in Chapter 2 5 Chapter 2 6 Mechanical Integration extended Chapter 2 7 Bipolar Tempera ture Operation added Attention Pin marking of series product changed against early samples Chapters 1 5 2 7 Chapter 6 added APPENDIX Data Sheet TEC2L 15 15 5 6 73 Additional information regarding anti parallel use of 2 ECT 310 2 8 added Published by EnOcean GmbH Kolpingring 18a 82
3. m ECT 310 ultra low voltage DC DC converter m Peltier element TEC2L 15 15 15 5 6 Programming Adapter Board EVA 330 m Detailed documentation EDK 312C consists of following parts m 315 MHz STM 312C all in one wireless sensor module with integrated energy storage m Others same as EDK 312 The ECT 310 can be soldered directly onto the STM 312 module For more details consult the STM 31x User Manual Given the high efficiency of the system already works at a temperature difference of 2 K simply placing a finger on one of the ceramic wafers of the Peltier element will cause the wireless sensor to transmit The opposite ceramic wafer must of course contact a somewhat cooler surface 2012 EnOcean www enocean com ECT 310 User Manual Page 11 20 Green Smart Wireless enocean 2 5 Evaluation with Development Kit EDK 300 For evaluation of an ECT 310 in combination with a STM 300 the multi purpose EnOcean Dev Kit EDK 300 can be used The first steps are described in the following 2 5 1 Assembly e Connect the Peltier element to the ECT 310 module pads VIN and VIN for pinning see chapter 1 5 for connecting please urgently note chapter 3 1 e Connect the ECT 310 pads Vout and GND to the External Source input of the EVA 320 board see the following figure OOoOOOOOOOOOOOOOOO d r OO0O0O0OOOOOOOOOOO0O00 b NK Le aH BERERER ERR EE 38 BET el RETRA E LED D6 Ple AD
4. 300 Thermo or Battery Powered from EnOcean www enocean com de application notes 2 3 Powering STM 312 based radio sensors The EnOcean module STM 312 is a module designed for use with an external energy har vester however in comparison to the STM 300 the energy storage is integrated already on board As well a whip or a helix antenna is pre installed already In addition the ECT 310 can be soldered directly onto the STM 312 module All together this enables very compact designs with lowest development effort For more information refer to the STM 31x User Manual please Antenna Peltier Element SIM 312 Sensor Element ECT 310 What is important is that the energy supply is fully isolated from the sensor cir cuitry In other words powering is by temperature but entirely different process variables can be measured such as pressure or humidity 2012 EnOcean www enocean com ECT 310 User Manual Page 10 20 Green Smart Wireless enocean 2 4 Evaluation with Development Kit EDK 312 For speedy evaluation of a thermally powered sensor the ECT 310 can be simply soldered to the back of the STM 312 All components needed are contained in the EnOcean EDK 312 evaluation kit HOT TELEEEEES mI enocean EVAS3SO 1 LE sc Kal Lu ef K gt WAKEO EDK 312 consists of following parts 868 MHz STM 312 all in one wireless sensor module with integrated energy storage
5. Please use the recycling operators known to you By agreement we will take packing mate rial back if it is sorted You must bear the costs of transport For packing material that is returned to us unsorted or that we are not obliged to accept we shall have to invoice you for any costs incurred Observe precautions Electrostatic sensitive devices 2012 EnOcean www enocean com ECT 310 User Manual Page 2 20 Green Smart Wireless enocean TABLE OF CONTENT 1 GENERAL DESCRIPTION ux aaa ina aaa narah Ban ag pak a ana AA KD ag BA a A AA ADA A A A Ba A aa a Ba 4 LEBI NGANAN KO TK KNA TT 4 1 2 Key ADDU CANONS E 4 Bo TENG a Ca eaaa E UU IU I UELUT 5 EAP VSI Cal ainen en aia aa don NA A aa aga aa Ban ALAA adr Na aan a JA AA AA DB ag anggadah d Ba NAH Ang Ang Aa MERE an Ba 6 sor MANGN aana aaa ITE 6 1 6 EnviFonmienteal es feld lela LE 7 1 7 Ordening fei ormat OT arai a aira ba aa akon aana Aa a aan fu anaa sap aaa pido Aah Aa aa aaa a pakon ans datur aboh ee 7 ele teg Lei INFORMACION aana aaa aa a kaa Bag AGA Aa oru tcs Bad GAGANA A AA raad ka A AA AA ABA dn Sca ne AA A uU 8 2 1 Energy Calculation Example E 8 2 2 Thermo powered radio sensors and radio controlled actuators with STM 300 9 2 3 Powering STM 312 based radio sensors sseessesseeeeee eene nnns 10 2 4 Evaluation with Development Kit EDK 312 esses nmn 11 2 5 Evaluation with Development Kit EDK 300 csse mnn nnns
6. 0 mV oc Vout Output voltage Vin 20 50 mV 3 4V Vout Output voltage Vin 20 500 mV 3 5 V load lt 10 MQ Input source impedance 2 Ohm Efficiency 25 mV 30 typ open circuit source output voltage without ECT connected EnOcean s ECT 310 oscillator already starts to resonate upwards of typ 10 mV open circuit input voltage On typ 20 mV a useful output voltage of more than 3 V is produced To en able the exceptionally high converter efficiency of 30 the output voltage is only roughly regulated to less than 5 V over the entire input voltage range up to 500 mV This is no problem for connected EnOcean modules because they are accustomed to working on un regulated supply voltage such as that from solar cells Output of ECT310 versus Input 1000 800 600 Uout V lout uA 400 200 0 a 1 1 E 0 0 20 100 200 300 400 500 Unloaded Input Voltage mV Energy source impedance Peltier element impedance around 1 5 Ohm 2012 EnOcean www enocean com ECT 310 User Manual Page 5 20 USER MANUAL Green Smart Wireless enocean ECT 310 PERPETUUM 1 4 Physical dimensions Module dimensions 14 x 14 x 5 mm Weight 1g PCB edges scratched and cracked contact pad edges milled and metalized Au 1 5 Pinning Vout 4 Top View Vin 1 Description Positive voltage from Peltier element Attention Pin marking has changed from early samples to volume produ
7. 041 Oberhaching Germany www enocean com info enocean com phone 49 89 6734 6890 EnOcean GmbH All Rights Reserved Important notes A purchase of ECT 310 DC DC converter module does not include the right to use this com ponent to power other radio interfaces then EnOcean radio EnOcean patent protection see chapter 5 This information describes the type of component and shall not be considered as assured characteris tics No responsibility is assumed for possible omissions or inaccuracies Circuitry and specifications are subject to change without notice For the latest product specifications refer to the EnOcean web site http www enocean com As far as patents or other rights of third parties are concerned liability is only assumed for modules not for the described applications processes and circuits EnOcean does not assume responsibility for use of modules described and limits its liability to the replacement of modules determined to be defective due to workmanship Devices or systems contain ing RF components must meet the essential requirements of the local legal authorities The modules must not be used in any relation with equipment that supports directly or indirectly human health or life or with applications that can result in danger for people animals or real value Components of the modules are considered and should be disposed of as hazardous waste Local government regulations are to be observed Packing
8. 12 Aol nn e e 12 259 2 COMMOUTAUON aaa aaa ara ian An a Wa TT Ba BY BA A BA KA Ka A BA an BA A NA EA AAN 13 Z2 RCM ngima pie gi E 13 2 6 Mechanical integration of Peltier elements csse mnn 13 2 6 1 Application EX alii cc 14 2 7 Bipolar Temperature Operation s eeeeeeeeeeeen inna n nh n n nn 15 2 0 Multiple Peltier operation ssssessssasennuneansnsennnnasnnnaonnnansnnanonnunaennusennnaaonnnaennnu 16 e ne EE 16 3 1 Connecting the Peltier element s eeeeeeeeeeeese nennen nnn nnn 16 3 2 Layout recommendations for foot pattern cssc 17 3 3 Soldering bh ii teen a e en ME 18 5 4 Packaging INTO Re Le EE 19 Agency Certifications ee 19 Patent Pro CUON ET 19 APPENDIX Data Sheet TEC2L 15 15 5 6 73 sssssssssssanssnsanssnsnnsnnsanssnnansnnnannns 20 2012 EnOcean www enocean com ECT 310 User Manual Page 3 20 USER MANUAL Green Smart Wireless enocearr ECT 310 PERPETUUM 1 GENERAL DESCRIPTION 1 1 Basic functionality ECT 310 is a low cost ultra low voltage DC DC converter for powering battery less EnOcean radio modules by thermal energy Wireless sensors and even actuators can be operated Operation starts at typical 20 mV relating to a 2 Kelvin temperature difference at a stan dard low cost Peltier element The output power is in the range from uW to mW and depends on the actual temperature di
9. IOS GE R2 LIGHT INTENSITY Offi SER RANGE SELECT Oi 2 PROGRAMMER EOP3828 ER eMe 1 1 19 9909 STORAGE UOLTAGE EVA320 2 ks ny ui ga mt ADIO4 BE apros Wakes NH LAK E GE v HOMO 0 BUTTON BUTTON2 WAKE1 LRN WAKE OCCUP Cc 2012 EnOcean www enocean com ECT 310 User Manual Page 12 20 USER MANUAL Green Smart Wireless enocearr ECT 310 PERPETUUM 2 5 2 Configuration Configure the EVA 320 board according to the following application example Temperature sensor NTC on ADIOO Retransmit every Wakeup 1s Long term storage EXT None Source EXT SOLAR Peltier connected Power Management Off On board If the heat sink has room temperature e g 20 C and one finger e g 30 C is pressed onto the Peltier element above the element will generate a few mV Please verify the right polarity ECT 310 will transform the generated voltage to a higher voltage and load the short term capacitor on the EVA 320 board The STM 300 module on the board will be pow ered by this energy and start sending telegrams 2 5 3 Functional check Check the ECT 310 output voltage via voltmeter To monitor the ramp up of the ECT 310 output voltage it can be measured at VDD and GND The long term storage is not con nected in this example Anyway loading the short term storage will last some seconds until Supply voltage is high enough for the STM 300 to send telegrams
10. ct Early samples can be simply identified by having silver connector pads volume product has 3 golden pads Au GND 14 mm 1 GND 2 Early samples pinning mm 14 mm 2012 EnOcean www enocean com ECT 310 User Manual Page 6 20 USER MANUAL ECT 310 PERPETUUM Green Smart Wireless enocean 1 6 Environmental conditions Operating temperature Storage temperature Humidity 20 C 60 C 40 C 85 C 0 93 r h non condensing 1 7 Ordering Information Type Ordering Code SENSAS S3004 P310 2012 EnOcean www enocean com Description Module www enocean com de enocean module ect 310 perpetuum Dev Kit 868 3 MHz www enocean com en enocean modules edk 312 Dev Kit 315 0 MHz ECT 310 User Manual Page 7 20 USER MANUAL Green Smart Wireless enocearr ECT 310 PERPETUUM 2 Application Information 2 1 Energy Calculation Example The following diagram shows a typical ECT 310 performance in combination with the Peltier element TEC2L 15 15 5 6 and the heat sink SK 426 Please note the output performance is affected by components connected largely their thermal resistance and ambience con ditions e g air flow Temperature difference on Peltier element Output power in pW O 0 9 10 15 20 Temperatur difference in K The yellow curve is the temperature difference directly on the Peltier element while the blu
11. e area of self powered applications An overview can be found at following link http Awww enocean com en patents Thermo powered wireless is covered by at least the following patents e http www patent de com 20030227 DE10137504A1 html e http www patent de com 20071129 DE102006024167A1 html e Patent pending for ECT 310 A purchase of ECT 310 DC DC converter module does not include the right to use this component to power other radio interfaces then EnOcean radio 2012 EnOcean www enocean com ECT 310 User Manual Page 19 20 Messtechnik GmbH Le EURECA APPENDIX Data Sheet TEC2L 15 15 5 6 73 TEC2L 15 15 5 6 Green Smart Wireless enocean 23 thermal and electrical data thermal force resistance thermal conductivity relatum change available maximum operating temperatures tolerances mechanical data size of cold side size of hot side height tolerance length and width tolerances weight ceramic plates location of production experimental data typical values at maximum cooling power at AT 0 and maximum temperature difference at 0 and 2012 EnOcean www enocean com C ROORC paoo c S00 K d I l iD I I I I Es ep Ss D TEE mm black I 4 blue I I 1 Do I LxBxH Lian X Bret AH AL and AB m femperciure KT 125 150 200 250 C 15 15 0 x 15 0 x 4 40 mm 15 0 x 15 0
12. e one indicates the difference from the temperature of the surroundings Seeing as a heatsink represents a thermal transfer resistance and thus loss of energy the blue curve is below the first one It is possible to read for example that even when using a heatsink approximately 100 uW of energy is already produced for a temperature difference of only 7 9C A typical EnOcean wireless module that is waked every two minutes to send a telegram needs about 5 uW The remaining 95 uW is enough to power a number of actuators to drive water valves air flaps or other mechanical devices Peltier element used Type TEC2L 15 15 5 6 73CS www eureca de Temperature coefficient 12 5 mV K Internal resistance 1 44 Q Thermal conductivity 0 046 W K 2012 EnOcean www enocean com ECT 310 User Manual Page 8 20 USER MANUAL ECT 310 PERPETUUM Heat sink used Type Thermal resistance Thermal compound used Green Smart Wireless enocearr SK 426 50 mm www FischerElektronik de 4 5 K W WLP 004 www FischerElektronik de 2 2 Thermo powered radio sensors and radio controlled actuators with STM 300 The EnOcean module STM 300 is designed for use in combination with an external energy harvester and energy storage This provides high flexibility for the realization of self powered sensor and actuator applications To support a fast start up and long term operation with no external energy supply available two different storages are
13. fference at the Peltier element ECT 310 is designed and optimized for powering EnOcean radio modules for wireless sensors and actuators To achieve best generator efficiency the output voltage is regulated only roughly The input voltage range of 20 mV to 50 mV corre sponds to an output voltage range between 3 V to 4 V A typical thermo driven sensor consists of a sensor element a small Peltier element the ECT 310 DC DC converter and an EnOcean STM 300 or STM 312 radio module Other than STM 300 the STM 312 radio module already has an energy storage on board ee 310 key features Best in class Thermo Harvester solution ultra low voltage high efficiency Low cost DC DC converter works with low cost standard Peltier elements Designed and optimized for thermo powered EnOcean wireless applications SMD footprint Directly to be soldered onto EnOcean STM 312 wireless sensor transmitter module Powers STM 300 module to realize bi directional wireless sensors and actuators 1 2 Key Applications m Wireless Sensors for Building and Industrial automation and Medical heat cost allocator temperature sensor process control preventive maintenance etc m Wireless Actuators for Building and Industrial automation water valves air flaps other mechanical devices 2012 EnOcean www enocean com ECT 310 User Manual Page 4 20 Re M enocean 1 3 Technical data Vin Input voltage start up 20 mV typ oc Vin Input voltage max 50
14. low temperature through a thin copper film a heatsink on the outside creates a difference in temperature from the second ceramic plate The air flow tempera 2012 EnOcean www enocean com ECT 310 User Manual Page 14 20 Re 9 enocean ture inside the tube thus causes the Peltier voltage to power the sensor The air flow tem perature inside the tube thus causes the Peltier voltage to power the sensor 2 7 Bipolar Temperature Operation The ECT 310 is unipolar so it is important to ensure correct polarity of the Peltier element If both cold and hot temperatures are to be used two ECT 310 modules can be connected to the Peltier element in antiparallel circuit 2 3 Vout GND ECT310 is equipped with a reverse diode at the input If two ECT310 are connected anti parallel at the input to serve either positive or negative thermo voltage one of these di odes will always be conductive Due to their forward voltage of 0 7V the leakage current can be neglected in normal operation voltage range which is only 20mV up to 200mV 2012 EnOcean www enocean com ECT 310 User Manual Page 15 20 P enocean 2 8 Multiple Peltier operation If multiple energy harvesters shall be used several ECT 310 may be connected in parallel at the output Vout and GND while each input is served by one Peltier element T1 Vout GND 3 Assembly 3 1 Connecting the Peltier element AN Take care for low tra
15. mm 0 5 mm 1 0 mm ag BEK 100 grey BR 96 white or AIN opaque China C maz Io Man LAT man Tp 50 C 5 6W 2 8 4 T3 4 K 2 24 4 0V Th 300K L9W 2 6A 65 0 K 20A 37V ECT 310 User Manual Page 20 20
16. nsfer and contact resistance shortest cable and lines suffi cient diameter good cable soldering Please note the correlation between mV and m2 Due to the high transformation rate e g 20 mV to 3 5 V factor 175 the input current will increase to rather high values Therefore a resistance of a few m at the contact or the line will already lead to a massive performance loss A The length of lines should not exceed 5 cm Lines of 5 cm or longer may act as distortive antennas for the connected radio module 2012 EnOcean www enocean com ECT 310 User Manual Page 16 20 Green Smart Wireless enocearn 3 2 Layout recommendations for foot pattern A The length of lines connected to I Os should not exceed 5 cm Lines of 5 cm or longer may act as distortive antennas for the connected radio module A GND layer below the module is recommended strongly gt gt At the backside of the module are several test pads It is important to exclude the possibility of short circuiting to the main PCB e g by using suited solder resist on the main board 12 0 2012 EnOcean www enocean com ECT 310 User Manual Page 17 20 Green Smart Wireless enocean 3 3 Soldering information The ECT 310 module has to be soldered according to IPC JEDEC J STD 020C standard Profile Feature Average Ramp Up Rate TSmax to Tp Preheat Temperature Min Tsmin 150 C Temperature Max TSmax 200 C Time tSmin to
17. r element increases with the temperature difference dT Thot Tcold Ensure good thermal decoupling of the hot and the cold Peltier plates Avoid thermal short circuiting of the mechanical assembly e g by using Styro foam or Polystyrene for heat decoupling styrofoam Ambient Air The low start up temperature and the considerable size of a low cost Peltier element e g TEC2L from Eureca measuring 15 x 15 x 5 6 mm should allow low skill and effort for mechanical integration to achieve reasonable performance The size of the plates e g 15 x 15 mm should allow sufficient thermal contact to both the hot and to the cold material The thickness of the Peltier element e g 5 6 mm makes it considerable to mount insulating material of suitable thickness e g styrofoam or use simply the plastic wall of a casement box So for typical sensor applications the selection of a suited Peltier element and its mechanical system integration should not be critical If optimum in performance is needed e g for actuators with relatively high energy demand please consult an expe rienced manufacturer of Peltier elements to help you to select and qualify the best elements and accessories for your individual application 2 6 1 Application Example As an example for the mechanical integration of a Peltier element please find the picture of a prototype of a thermo powered air duct temperature sensor in the following The inside is brought up to air f
18. tSmax 60 180 seconds Time maintained above Temperature T 217 C Time t 60 150 seconds Peak Classification Temperature Tp Time within 5 C of actual Peak Temperature tp Note 1 All temperatures refer to topside of the package measured on the package body surface t ro a nmammooaoset Ramp up Rs Critical Zone IT to Tp Temperature gt Preheat 25 t 25 C to Peak Time gt gt IPC Q20c 5 1 N ECT 310 may be soldered only once since one time is already consumed at pro Eb duction of the module itself A ECT 310 modules have to be soldered within 6 months after delivery 2012 EnOcean www enocean com ECT 310 User Manual Page 18 20 Green Smart Wireless enocean 3 4 Packaging Information For automatic assembly the ECT 310 modules are available in a pick amp place tray The outer dimensions of the tray are 166 x 205 mm Drawings showing further details of the tray will be provided by EnOcean upon request The standard ECT 310 packaging unit is a card box that contains 100 ECT modules in 5 trays with 20 modules each and one empty cover tray 100 pcs 5 x 20 pcs 4 Agency Certifications The ECT 310 module assembly conforms to the European and national requirements of electromagnetic compatibility EMC The CE conformity is proven the relevant documentation is on file at EnOcean 5 Patent Protection EnOcean GmbH owns multiple patents in th
19. used typically A small storage fills quickly and allows a fast start up A large storage fills slowly but once it is filled it provides a large buffer for periods where no energy is available e g a solar powered sensor at night To provide energy quickly and to provide large energy capacity at the same time a small and a large storage are combined STM 300 provides a digital output WXODIO which en ables to control the charging of these two kind of storages At the beginning as long as the voltage is below the VON voltage only the small storage will be filled Once the threshold is reached the WXODIO signal changes and the large storage will be filled For more details please see chapter 3 1 of the STM 300 User Manual Peltier Element ECT 310 storage Storage Charge Management Short Long Tem Tem I I Antenna STM 300 Actuator WXODIO Sensor VDD Element The concept for thermo powered actuators inclusive energy balance calculation is described in in the article EVERYTHING THERMO OR WHAT Actuators without cables and batteries in the EnOcean perpetuum magazine issue 1 from 2009 www enocean com fileadmin redaktion pdf perpetuum perpetuum 01 2009 en pdf 2012 EnOcean www enocean com ECT 310 User Manual Page 9 20 USER MANUAL Green Smart Wireless enocearr ECT 310 PERPETUUM Technical details concerning STM 300 power requirement are described in the Application Note AN 209 STM
Download Pdf Manuals
Related Search