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1. Ge Os k 9 o D n Ny o o O 9 0 0 o a O z oe A KN 0 A dh O DL LAHI li gt S 6 bys 7 2 d j z m 6 o o Ball e Lass 9 e L Sc En e el ds E e on z gt Be o 9 7 U Gei amp o y o a _ lt 8 y E ST F lo o Ge e ER Sp Jr a Op 8D E LA AA AA eli b CASCOS 7 E LCA KA KR AY E ZA CY YY X J RE IRAN 7a ar 8 l z SOY Y Y YY Ae ey oe AAA AAS I o o 0 ll s RS 232 INTERFACE Module is supplied with RS 232 user interface D SUB 9 pin connector is located at the back side of the module Characteristics of RS 232 interface are given below RS 232 connection parameters 38400 bps 8 data bit 1 stop bit no parity Command format is command data optionally end of line e Command is 1 character long see list below Data is ASCII string command and data must be separated with space space symbol End of line symbols are n or r n List of available commands v voltage V sets voltage f frequency Hz sets2. are two LEDs nearby the SIMMER SUPPLY button Left one just indicates if SIMMER SUPPLY button is pressed or released Right one SIMMER STATUS LED indicates if the simmer discharge is established at the moment Normally it takes just a few seconds to establish simmer discharge and light SIMMER STATUS LED Elsewise something goes wrong CHARGING MODULE button starts stops capacitor charging module After CHARGING MODULE button is pressed capacitor charging module tries to charge internal capacitor battery up to value selected within VOLTAGE group There are two LEDs nearby the CHARGING MODULE button Left one just indicates if CHARGING MODULE button is pressed or released Right one READY LED indicates if capacitors are successfully charged or not at the moment Normally it takes 2 3 seconds to charge capacitor battery from zero to Vmax and much less within interpulse interval Note if READY LED doesn t blink between two sequential pulses it means that desired output power which depends on KO voltage pulse width repetition rate exceeds maximal output power of the module ENABLE button output of the module is disabled till ENABLE button is on Corresponding LED indicates its status Note besides ENABLE button you need to establish simmer discharge turn the capacitor charging module on and press FOOTSWITCH to get pulse SYNCHRO button enables disables output of synchronization signal Since the same synchro sig
3. before making or changing electrical or mechanical connections e Don t remove protective covers There are no user serviceable parts inside this equipment Do not self repair the driver e Do not turn the driver on if it was already damaged with water chemicals mechanical or electrical shock USER INTERFACE DESCRIPTION FRONT PANEL DESCRIPTION POWER VOLTAGE REPETITION SWITCH MONITOR RATE m IT gt DUT 8 eee CIR SYNCHRO PULSE CONNECTOR VOLTAGE WIDTH POWER SWITCH turns module on and off VOLTAGE group of 4 digits indicator and two buttons Use this group to set desired output voltage up to Vmax PULSE WIDTH group of 4 digits indicator and two buttons Use this group to set desired pulse width see page 3 REPETITION RATE group of 4 digits indicator and two buttons Use this group to set desired repetition rate see page 3 VOLTAGE MONITOR indicates real voltage capacitor battery is charged to SYNCHRO CONNECTOR provides synchronization output signal for communications with other modules Synchronization signal may be delayed relatively to start of the flashlamp s pulse SIMMER STATUS LED HH READY LED HH OO O O 0 O O ENABLE button CHARGING MODULE button SIMMER SUPPLY button SYNCHRO button SIMMER SUPPLY button starts stops simmer supply After SIMMER SUPPLY button is pressed simmer supply continuously tries to strike flashlamp and establish the simmer discharge There
4. the Pockels cell Be careful Ensure that HV MONITOR changed its state Go out from PCD MODE Go to SPD MODE Select desired q switched pulse delay Go out from SPD MODE Press SYNCHRO button q switched pulses are impossible without this action Press SIMMER SUPPLY button wait for SIMMER STATUS LED Press CHARGING MODULE button wait for READY LED Press ENABLE button Press footswitch The power supply starts its work To turn power supply off press ENABLE CHARGING MODULE SIMMER SUPPLY buttons again Then turn power supply off no need to turn off Pockels cell driver separately DRAWINGS
5. 0 mA other on request Max simmer voltage 200V Geer M Pockels cell driver optionally SEET E o AR Synchro pulse delay time user defined A Hardware protections from overvoltage from overheating from flashlamp breakdown fuses Environment e Operation temperature A Storage temperature 20 60 C SE _ Humidity 90 non condensing 7 MECHANICAL SPECIFICATION Size LxWxH 483x380x88 mm Weight about 6kg OVERVIEW FLD is a laser power supply designed for driving of pulsed flashlamp pumped solid state lasers such as Nd YAG Er YAG Alexandrite etc Module contains all necessary to drive standard flashlamp capacitor charger simmer supply capacitor battery user interface etc Water cooling system is not included SAFETY e During operation the protective covers of the equipment must be securely in place and all electrical connections must be properly attached e Do not operate with disconnected load e The FLD laser power supply is designed to be properly grounded e lt is the user s responsibility to ensure that personnel are prevented from accidentally contacting the power supply high voltage connectors and cables Casual contact could be fatal e After shutdown do not handle the system output until internal capacitor battery has been completely discharged Use an appropriate meter to check for complete discharge e Disconnect the power supply from the mains
6. ase use the formula as follows KO 1 28 1 p Ee where is arc length mm d bore diameter mm p pressure torr di PO 1 atm 760 torr pO constant 450 torr for Xe filled flashlamps MAXIMAL PULSE ENERGY FLD laser power supply has also restrictions to the maximal pulse energy These restrictions don t cause immediate module s failures but we recommend considering them before operations because they may cause delayed module s failure 1 Firstly pulse rectangularity depends on pulse energy and its ratio to the total energy stored in the capacitor battery The higher pulse energy the more non rectangular pulse Commonly used criterion is Epulse lt 0 1 Ecap In such case pulse shape is almost rectangular voltage drop in the end of the pulse is about 5 2 Secondary lifetime of electrolytic capacitors used in power supplies with rectangular pulse shape depends on capacitor s discharge during the pulse Capacitor manufacturers don t recommend to discharge more than 30 of energy stored in capacitor Le Using formulae for estimated pulse energy and energy stored in capacitor battery after calculations we obtain simplified criteria C C Ut lt 0 1 o Ut lt 0 3 KO where U is voltage V t pulse width seconds C capacitance of capacitor battery F KO flashlamp impedance Ohm A Some examples are given below All plots depict the second capacitor lifetime based criterio
7. frequency p pulse width us sets pulse width d synchro delay us sets synchro delay V returns preset voltage F returns preset frequency P returns preset pulse width e D returns preset synchro delay s simmer enable starts simmer supply if simmer supply is stopped s simmer disable stops simmer supply if simmer supply is started c ccm enable starts capacitor charging module if ccm is stopped c ccm disable stops capacitor charging module if ccm is started o start starts operations o stop stops operations S simmer status returns simmer supply status enabled disabled e C ccm status returns capacitor charging module status enabled disabled e O operations status returns operations status enabled disabled e 1 simmer sensor returns status of internal simmer sensor is on is off e 2 ready returns capacitor charging module status is ready not ready e U voltage monitor returns internal voltage monitor e F footswitch returns footswitch status pressed released Example e run HyperTerminal software e type v 300 then press ENTER it must set voltage to 300 V When you use self written software don t forget end of line and space symbols
8. ggerin AR Thk EXTERNAL need Pockels cell If YES please specify Pockels cell driver part number too only GEES QBD series Pockels cell driver may be embedded driver inside Please fill all information you know 1 2 if needed 3 if needed KO Ohm A My flashlamp flashlamps Arc length mm is are as follows Bore diameter mm Voltage drop 500mA current V have special requirements I ve read further pages and understand all module s limitations LIMITATIONS Laser power supply doesn t know what kind of flashlamp is attached to the module In the case of partial discharge it s a trouble because in the case of partial discharge flash parameters strongly depend on flashlamp type As a result the customer must be responsible for parameters he requests from the module There are three major limitations CURRENT LIMIT FLD laser power supply has restrictions to its output current capability Since module doesn t contain any active protections from overcurrent it s the customer s responsibility to ensure that operating current doesn t exceed 1kA limit Formulae Peak current through the flashlamp during the pulse can be calculated as 2 U Ls where is the current A V voltage V KO flashlamp impedance Ohm a K02 Assuming 1kA current limit we obtain simplified formula that describes safe operations region U lt 31 6 KO If flashlamp KO is unknown ple
9. in PCD MODE To enter this mode press two buttons marked with red at the same time see PCD MODE picture III RRG HV MONITOR O 00 00 O BCID 888 0108 ENABLE PCD MODE After entering this mode HV use this group to set desired high voltage HV MONITOR indicates measured value of high voltage HV ENABLE press this button to enable disable high voltage output of Pockels cell driver To quit PCD MODE press two abovementioned buttons again OPERATIONS FREE RUNNING 10 Connect flashlamp to the power supply Connect footswitch or its alternative to the power supply Connect power supply to the mains Turn on power supply Select parameters you wish to obtain on power supply output Press SIMMER SUPPLY button wait for SIMMER STATUS LED Press CHARGING MODULE button wait for READY LED Press ENABLE button Press footswitch The power supply starts its work To turn power supply off press ENABLE CHARGING MODULE SIMMER SUPPLY buttons again Then turn power supply off OPERATIONS Q SWITCHING 1 10 11 12 13 14 15 Connect flashlamp to the power supply Connect Pockels cell to the power supply Connect footswitch or its alternative to the power supply Connect power supply to the mains Turn on power supply Select parameters you wish to obtain on power supply output Go to PCD MODE Select desired high voltage Press HV ENABLE button This action immediately applies high voltage to
10. n X axis voltage V Y axis pulse width milliseconds Area allowed with the criterion is in the left bottom part of the plot Capacitance 14 000uF i e Vmax is in range 300V 450V 150 200 250 300 350 400 450 Maximal voltage based on 1kA current limit is 316V Capacitance 3 000uF i e Vmax is in range 451V 900V 200 400 600 800 200 400 600 800 Maximal voltage based on 1kA current limit is 316V Maximal voltage based on 1kA current limit is 474V 200 400 600 800 200 400 600 800 Maximal voltage based on 1kA current limit is 632V Maximal voltage based on 1kA current limit is 790V Recommendation The lower KO has your flashlamp the lower Vmax should be chosen MAXIMAL REPETITION RATE First of all maximal repetition rate is limited with 100 Hz hardware limit caused with IGBT switching losses Besides maximal repetition rate is limited with maximal output power and pulse energy ratio Also customer must take onto consideratio
11. n that maximal output power depends on output voltage Maximal output power is equal to nominal output power in range about 70 100 of Vmax At lesser output voltages maximal output power decreases linearly to zero P Pmax 1 7 0 8 x A 0 6 a 0 4 Lo Y 0 2 De V Vmax 0 2 0 4 0 6 0 8 Recommendation Vmax should be chosen near real operating voltage Large gap between operating voltage and Vmax decreases significantly the maximal output power As a result customer must operate in area limited with the following inequalities U lt 31 6 KO C KO t lt 0 3 2 U f lt 100 Hz PIU K02 SPECIFICATION PREDEFINED ELECTRICAL SPECIFICATION Input Input voltage 1 phase 230 VAC 50 60 Hz oo lt o A A _Max voltage Vmax user defined in 300V 900V range Max current 1000 A see also Current limit section Pulse width user defined see also Maximal pulse energy section Repetition rate user defined hardware limit 100Hz Max output power Wmax user defined in 500W 1750W range tt S Discharge E D TT TTT Te Capacitor battery depends on Vmax as 300V 450V capacitance is 14000uF 451V 900V capacitance is 3000uF _ Triggering Triggering type user defined e velada es Triggering pulse energy about100m mee A ee Simmer current about 50
12. nal controls Pockels cell driver this button enables disables high voltage pulses too TT TT BACK PANEL DESCRIPTION MAINS connector conjugated cable are supplied connects module to the mains FLASHLAMP connectors conjugated cables supplied anode connector is marked with cathode with FOOTSWITCH connector conjugated cable with simple button supplied you need to connect to this connector either footswitch or handheld button or just short circuit this connector INTERLOCK connector you need to connect to this connector some sensors that are allowed to block module s output or just short circuit this connector FUSES 2x fuses rating depends on selected maximal output power HV OUTPUT connector conjugated cable supplied standard MOLEX MINIFIT connector the output of embedded Pockels cell driver SYNCHRONIZATION PULSE DELAY SPD MODE If you need to change synchronization pulse delay you have to enter SPD MODE To enter this mode please press three button marked with red at the same time see SPD MODE picture Indicators marked with blue will allow you to change synchronization pulse delay in user defined range see page 3 To return to the main mode please press abovementioned three buttons again POCKELS CELL DRIVER Module may contain embedded Pockels cell driver of QBD series See page 3 for Pockels cell driver part number Parameters of the Pockels cell driver may be set
13. rev 1 01 2011 01 21 FLD 2U laser power supply Partial discharge modifications User Manual Table of content COMMON SCCHOINS E 3 Specification user defined eee 3 Bi VC leie 4 o eer 4 Maximal pule CNO ee 4 E e Tee 7 Specificaton brecdeliied RE ee ee 8 Elecliical SOCCIICAUIOND EE 8 Mechanical EE EE ee 8 TEE EE 9 SI E 9 Zeite ace A aa 10 Reide lei RE iio 10 Front Dane OSSCHDHON EE 10 BACK Dane des CADA EE 11 SVNCHFONIZAUON DUIS O OCIA tia DI it 11 POckels EE 12 Eege ER D ele Un Te EE 13 Operations ter ele EE 13 Drawno EE 14 MEET 15 COMMON SECTIONS SPECIFICATION USER DEFINED wooo a a a a ii i i a Mai aa Maa a ii ai a a ai a aiaia i a iia a i aai ai a a M ai aa i ai aiaiai aia i a aai aa aiaa M a i aia a a i aia a aiaiai aiaiai aM aiaa iii iii iii MAXIMAL OUTPUT POWER SELECT ONE User defined Value please fill Recommended Values allowed Comments parameter this column values any in range MM 500W 1750W Capacitance of internal capacitor battery depends on maximal output voltage Vmax Maximal output voltage any in range Vmax V 300V 900V APON OIN 300V 450V capacitance is 14000uF 451V 900V capacitance is 3000uF Please fill all fields need parameters to be adjusted in ranges as Pulse width ms follows Repetition rate Hz Synchro pulse delay ms Tri
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