Pulse Generator for Power Electronics User Manual
Contents
1. pulse train rep cwfm single single shot pulse train Start pulse train read preselection sec debounced Reset error latch possible only with no error condition present Status LED error latch red error all outputs in logically OFF state Encoder plus status LEDs deadtime and puls length of last pulse within a pulse train Selector error logic a pos logic b neg logic c error input disabled BNC input error signal schematic page 7 14 Adjust logic level and supply output voltage Usut Ona 15Vbpc 1Amaxl BNC output Uu for supply of e g an isolated IGBT driver Output auxiliary power supply 5Vpc 10MAmax e g for optical error receiver supply Trigger signal output 5V 15V into 500 2 5V 7 5V Channel A output 5V 15V into 50Q 2 5V 7 5V Channel B output 5V 15V into 50Q 2 5V 7 5V Status selectors output logic mode Case legs Rear elements and interfaces Multifunction connector for fixed test setups Selector internal signal generation external signal applied BNC input for external signal BNC input for external pulse train start Reserved connector not wired reserved for possible uP interface Power supply input PMG 02 will operate floating only when a floating power supply is used here Minus supply is close to but not identical with BNC minus PMG 02_Bed_Anleitung_v1 32_oce_eng doc 01 08 2006 M Billmann 3 18 1 Contens Seite 2 About this2. around zero deadtime No jitter is availiable in default mode only last pulse default about 15usec signalized with a yellow illuminated last pulse LED 5 11 Short circuit Il setup The outputs CH AT CH_B of the PMG 02 do not neccessarily have to serve a half bridge topology A encoder setup can be found that one channel can ramp a standard load current at inductive load into a device under test After a ramping time of e g several 10usec a larger short circuit I switch may short the load and a power electronic system may also be characterized in this condition Warning It is strongly recommended to implement the PMG 02 s error input while performing such kind of evaluations 5 12 External signals An external one phase digital signal 25 may be handed thru the outputs Features like level shifter deadtime generator jitter generator output amplifier split into complementary signals error shutdown mode can be used hereby External signals can be clocked in with a variable jitter This jitter is adjustable 10 from 10nsec up to 10sec 3 This is realized by using the internal frequency generator block to clock in the external information Minimum jitter is accieved in the highest 1MHz decade and maximum right position of the frequency adjustment knob 4 Jitter free handling of external signals on request Propagation delay times are kept short and additionally depend on the logic level used Signal
3. interfaces can be looked up on page 8 14 of the schematic 5 13 Rear multifunction connector X10 If only one PMG 02 is availiable in a lab the user has the possibility for various fixed test setups by use of the rear multifunction connector X10 23 All major signals are present at X10 A fixed test bench e g Switch OFF losses or reverse recovery losses can be wired to this connector Additionally the outputs A B Trigger are availiable at 5V HCMOS level They will provide maximum and minimum duty cycles even in the highest decade For smaller auxiliary circuits supply voltages as 3 3V 5V and Uou are present there Please consider schematic page 2 14 rear remote connector for further details PMG 02_Bed_Anleitung_v1 32_oce_eng doc 01 08 2006 M Billmann 15 18 6 Failure In case of failure immediately disconnect and power down the PMG 02 In case of damages please consult us directly 7 Maintainance Service Accessories 7 1 Maintainance T2 This unit does not need maintainance It may only be operated in dry clean areas Take care that the unit is kept in a non dusty condition Dust may cause dysfunction or reduced performance Abandonment 1 Turn the unit OFF 2 Disable all energy sources and disconnect from mains and supply Disassembly For disassembly proceed as followes 1 Dismount the unit into single components 2 Sort these components for material plus disposal criteria and hand it to an officia
4. two channel pulse generator for digital square wave output impulses with additional trigger output It s logic level is adjustable 15 up to 15V and invertable for both channels Both channels may be disabled also This configuration will preset into which logic level the outputs will move in case of a set error latch A buildt in auxiliary power supply 16 from 5V to 15V 1A max is provided to supply external isolated gate driving units An adjustable linearized 4 frequency range from 0 1 Hz to 1 MHz is covered over 7 decades 3 and a presettable duty cycle 5 from 0 to 99 1 steps at 1 MHz decade 5 to 95 in 1 steps at the 50 Q outputs provides jitter free output signals in the first instance An error input 14 is configurable for either positive or negative logic 13 The buildt in error latch will disable all output signals immediately A set error latch will force all outputs into logically OFF depending on the position of the status switches 21 The error latch is reset by the reset buttom 10 This will only be successful if no more error is present The outputs 19 20 tolerate and are matched to a 50Q load They also are suitable to directly drive LEDs or fibre optical transmitters PMG 02_Bed_Anleitung_v1 32_oce_eng doc 01 08 2006 M Billmann 7 18 The operator may choose 8 between continuous waveform and pulse trains on demand by pushing the start buttom 9 Pulse trains from 1 t
5. Pulse Generator for Power Electronics PMG 02 decade select te Tmax DM duty cycle IXI pulses trigger error D default 5 SEN T a last pulse freeze e et r single on ower P Ei User Manual type PMG 02 version 1 32 eng document 1 32 date 01 08 2006 Ing B ro M Billmann 05 2004 Lerchensteige 10 91448 Emskirchen Telefon 49 0 9104 8235 88 Fax 49 0 9104 8235 89 email M Billmann t online de PMG 02_Bed_Anleitung_v1 32_oce_eng doc 01 08 2006 M Billmann 1 18 ING BURO M BILLMANN PMG 02 Pulse Generator for Power Electronics VII ea A hA ecv o2 RS ES n ke kA decad select OO 0 SN Tex pulses o Ve hy single default SA x deadtine Aet ast pulse freeze C sol A ei lt N E A Om we fig 2 rear elements PMG 02_Bed_Anleitung_v1 32_oce_eng doc 01 08 2006 M Billmann 2 18 Description of elements Front side elements and interfaces oo Nee Lr malt eh 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Power ON OFF switch Power ON LED Decade selector switch 0 1Hz 1MHz Frequency adjustment linearized 10 turns per decade Duty cycle preselect 0 99 BCD switch Preselect number of pulses per pulse train 0 9 Preselect synchronous trigger pulse 0 9 Selector continuous waveform
6. ain is varied Hint A negative deadtime overlapping pulses is possible to appreciate shoot through or optimization tasks in a halfbridge or at resonant DC DC converter topologies It is also desirable for pulse overlap in current fed inverters or matrix inverters Hinweis Deadtimes overlap times up to about 160usec may also be used for short circuit Il setups PMG 02_Bed_Anleitung_v1 32_oce_eng doc 01 08 2006 M Billmann 8 18 5 Start up and operating the unit 5 1 Supply As supply 28 any voltage in the range of 18V 28Vpc may be used The internal power consumption is lt 0 3A but the power supply must be able to cover additional connected loads Hint The supply ground is not identical but close to the BNC output ground 5 2 Power ON Turning the unit into ON state is created by toggling the power ON 1 switch The PMG 02 will signal this with a green illuminated ON LED 2 a yellow illuminated default LED and with the error latch status LED 11 in red colour Hint Whatever was set up during last operation will be ignored when powering up the PMG 02 again The unit will always restart with a set error latch deadtime OFF and last pulse default about 15usec To receive output pulses the error latch must be reset by pressing the reset buttom 10 or by operating the reset pin at the rear side multifunction connector 23 After a re power up sequence the start b
7. are current limited and clamped to the internal supply for protection against external overvoltages In case of short circuit for several minutes the output drivers may suffer from thermal overload 5 9 Error input and error latch The PMG 02 has an logically selectable error input 13 followed by an error latch The toggle switch has 3 possible positions a pos logic right position LOW no error b negative logic left position HIGH no error c error input disabled center position error input ignored Setting the error latch stopps all output signals immediately If error is set during a trigger pulse the trigger signal will also be cut off Reset of the error latch is possible by pushing the reset knob 10 and will be successful only if no error is present If a fibre optical receiver is choosen for feedback of an error signal an auxiliary power tab 17 provides up to 5Vpc 10MAmax to supply the optical receiver Hint The PMG 02 has an internal power good monitor for various internal supply voltages This information is linked to the error latch and sets the unit into error state while powering up PMG 02_Bed_Anleitung_v1 32_oce_eng doc 01 08 2006 M Billmann 13 18 5 10 Encoder setup deadtime and last pulse The PMG 02 has an encoder menue for presetting deadtime and last pulse functions It is operated by pushing and turning the encoder 12 menue stat
8. document 5 2 1 How to use this document 5 2 2 Used symbols and abbrevations 5 3 Description 5 3 1 Intended usage 6 3 2 Safety 6 3 3 Warning hints legal stuff 7 4 Functional description 7 5 Start up and operation 9 5 1 Supply 9 5 2 Power ON 9 5 3 Select logic status and logic level 9 5 4 Select frequency 10 5 5 Select duty cycle 11 5 6 Select continuous wfm or pulse train 11 5 7 Starta pulse train 12 5 8 The outputs 13 5 9 Error input and error latch 13 5 10 Encoder adjustment deadtime and last pulse 14 5 11 Short circuit Il setup 15 5 12 External signals 15 5 13 Rear multifunction connector X10 15 6 Failure 16 7 Maintainance Service Accessories 16 7 1 Maintainance 16 7 2 Service 16 7 3 Accessories 16 8 Annex 17 8 1 Declaration of Conformity 18 8 2 Schematic A1 A14 8 3 Part location on main PCB B1 B2 PMG 02_Bed_Anleitung_v1 32_oce_eng doc 01 08 2006 M Billmann 4 18 2 About this document This document describes how to operate setup and adjust troubleshoot the Pulse Generator for Power Electronics PMG 02 2 1 How to use this document Please read this manual carefully to operate the PMG 02 correctly On page 2 and 3 You will find the control elements and interfaces listed in graphical illustration to get an easy link to the description in this manual This document targets to the following group of persons Professionals in Power Electronics Electronics engineers in the field of gat
9. e driver developement 2 2 Used Symbols and abbreviations Hint Hints describe the advantages of certain adjustments and setups and assist You to draw out maximum performance of the unit Warning Warnings Read and follow these instructions carefully Warnings shall prevent people from danger and help to avoid damage of the unit or the device under test PMG 02_Bed_Anleitung_v1 32_oce_eng doc 01 08 2006 M Billmann 5 18 3 Description the PMG 02 is a two channel square wave functional pulse generator with additional trigger output An error input with error latch shuts down output signals on demand A buildt in auxiliary power supply can be used to supply external gate drive units A deadtime and the duration of the last pulse of a pulse train can be adjusted by setting up an internal encoder 3 1 Intended Usage This unit is designed for industrial use in electronic laboratories and test benches of power electronics only This unit is able to generate single pulses pulse trains and continuous waveforms suitable for characterization of power semiconductors gate drive units and power inverters Use this unit in dry and suitable clean areas only 3 2 Safety This section is for Your safety Please read this section carefully before operating the PMG 02 Qualified personal The PMG 02 may only be started and operated by qualified personal Qualified is who has suitable technical training and has got technical i
10. facturers name and adress Ing B ro Markus Billmann Lerchensteige 10 91448 Emskirchen The Ing B ro M Billmann herewith declares conformity of the product Product name Pulse Generator for Power Electronic Measurements Type PMG 02 Options With applicable regulations EMV Directive 89 336 EWG amended by 91 263 EWG 92 31 EWG Low Voltage Equipment Directive 73 23 EWG amended by 93 68 EWG Harmonized standards applied Safety EN61010 1 VDE 411 1 Safety instructions for electronic laboratory devices EN60664 VDE 0110 Isolation Pollution degree 1 Technical documentation is fully provided Operators manual is attached A ft AOR Emskirchen den 19 05 04 M Billmann C E O PMG 02_Bed_Anleitung_v1 32_oce_eng doc 19 05 2004 M Billmann 18 18
11. l waste management Disposal Hint Respect the specific disposal regulations of Your country Service Never carry out repair on Your own please contact Ing Buro M Billmann phone 49 0 9104 8235 88 Lerchensteige 10 fax 49 0 9104 8235 89 D 91448 Emskirchen email M Billmann t online de PMG 02_Bed_Anleitung_v1 32_oce_eng doc 01 08 2006 M Billmann 16 18 7 3 Accessoires The PMG 02 was developed considering a long year experience in power electronics The wish for useful things to make power electronics design and application engineers life easier was main issue In correlation to accieve this goal tere is availiable a variety of fibre optical transmitters fibre optical receivers error input scope trigger adaptors for Semikron SKiiP interfaces For custom specific demands or special options please contact us directly Quantity and function of accessoiry parts availiable on stock is in permanent growth Computer aided remote control 27 on request 8 Annex This section provides additional documentation that were given by Ing Buro M Billmann or third parties 8 1 Declaration of Conformity 8 2 Schematic of PMG 02 8 3 Part location on main PCB 8 4 Patch 01 PMG 02_Bed_Anleitung_v1 32_oce_eng doc 19 05 2004 M Billmann 17 18 Dipl Ing Markus Billmann Lerchensteige 10 91448 Emskirchen Dipl Ing M Billmann Lerchensteige 10 91448 Emskirchen Declaration of Conformity CE Manu
12. nstruction from a trained user or the manufacturer concerning the start up and the operation of the PMG 02 and has access to this manual at any time Reservations of the manufacturer Maintainance and service may only be fulfilled by qualified service personal with suitable technical training Always disconnect all energy sources when electrical or mechanical service is applied Spare parts as well as tools must meet the technical demands of the manufacturer For preservation of warranty original replacement parts must be used only Technical details may change without notice PMG 02_Bed_Anleitung_v1 32_oce_eng doc 01 08 2006 M Billmann 6 18 3 3 Warning hint exclusion of liability This unit generates pulse patterns that are suitable to test power electronic systems It is always possible and depending on the target of investigations to exceed the limits of devices under test Warning The Pulse Generator PMG 02 is able to generate pulse patterns that may cause malefunction degradation or damage of high energy systems which may lead to consequential damage of persons and or asset values Suitable personal security action must strictly be used Always use isolated gate drive units when characterizing semiconductors or inverter systems operating at dangerous voltages Any liability for damages caused by the use of this Pulse Generator PMG 02 is excluded 4 Functional description The PMG 02 is designed as a
13. nt condition 5 7 Start pulse trains pulse sequences In single mode a preset 6 pulse train begins by pushing the start knob 9 For more than 1 pulse n gt 1 the last pulse will have a maximum length of 15usec while the encoder is in default position A trigger pulse can be choosen 7 synchronous to any of the n pulses A change in duty cycle 5 will be recognized with the next time the start knob 9 is pushed The start knob is debounced by 1 sec to provide sufficient time for cooling down a device under test Another possible start option is given by shortening the rear side start_in BNC connector 26 or by usage of the corresponding signal at the multifunction connector X10 23 By cascading two or more of the PMG 02 much more complex pulse patterns e g phase shift are possible Hint The rear side start mm inputs are less debounced and allow a faster repetition gt 100Hz Trained service personal may chance this debouncing time by a hardware change please see schematic page 8 14 PMG 02_Bed_Anleitung_v1 32_oce_eng doc 01 08 2006 M Billmann 12 18 5 8 The outputs The BNC outputs CH AT CH_B and Trigger_out are designed to drive 50Q loads Also they are able to drive optical transmitters for fibre optical pulse transfer Parallel to the front side BNCs they are availiable at the rear multifunction connector X10 23 Rise and fall times are better than 10nsec Hint The outputs
14. o 9 pulses length 6 are presettable with a one second debounced start buttom triggered repetition rate From two or more pulses on the last pulse has a maximum length of about 15usec as long as the encoder is in default mode This is used for pulse reduction in terms of overload protection when measurements close to nominal semiconductor current are performed At the trigger output 18 a trigger pulse is presettable 7 synchronous to one of the up to nine pulses that are generated This trigger pulse is synchronous to the output pulses even in case of an earlier shutdown due to a set error latch Hint If e g 2 pulses are presetted and trigger is set to the 4 pulse no trigger pulse will be generated A valid trigger signal will only be present as long as n trigger 7 lt n puls 6 An external one channel digital signal 25 can be handed forward to the outputs Hereby functions as level shifter deadtime generator jittergenerator output amplifier error latch and logic conversion are considered This signal may be splitted into 2 complementary output signals External signals are clocked in with a variable maximum jitter time Maximum jitter is adjustable 4 from 20nsec up to much more than 100usec 3 Pushing and turning the encoder knob 12 a variable deadtime in coarse and fine steps is adjusted from 20nsec to very long values In the encoder menue last pulse the length of the last pulse of a pulse tr
15. output signals are received in A positive logic by setting mode_CH_A into upper and mode_CH_B into lower position 5 4 Frequency selection The frequency may be varied within 7 decades 3 and a 10 turn knob 4 1 Decade selection 0 1Hz 1Hz 10Hz 100HZ 1kHz 10kHz 100kHz 1MHz 2 Tuning within a decade is linearized This means that 0 100 potentiometer display corresponds to 0 100 output frequency of this decade 3 The internal frequenqy generator will lead to output signals only if the rear side intern extern selector is in positon intern Hinweis Although such generated frequencies are handed through an internal digital system the output frequency is jitter free as long as no deadtime is choosen Variing the frequency is possible during operation at any time e g to fine tune pulse length or sweep a desired range PMG 02_Bed_Anleitung_v1 32_oce_eng doc 01 08 2006 M Billmann 10 18 5 5 Selection of duty cycle Preset the desired duty cycle by the 2 digit digital switch array duty 5 1 Choose between 0 and 99 in 1 steps 2 A changed duty cycle will be taken over by pressing the Start knob 9 Hint The output pulses are free from jitter and do not depend on a chooosen duty cycle At duty 0 neither output pulses nor trigger pulses are generated Minimum and maximum duty cycles will not be reproduced correctly in the highest decade at the 50Q outputs If e g 1 duty at 1MHz is required
16. please take these pulses from the multifunction connector 23 in fixed 5V HCMOS level Example for application Performing a single pulse short circuit test with a given DC link voltage and a fixed inductive load a very comfortable working of this process can be accieved by usage of the duty cycle array The target value of the maximum switched off current can additionally be fine tuned by the 10 turn potentiometer 4 5 6 Repetetive mode or pulse train The position of the rep single switch 8 decides wether permanent oszillation continuous waveform or a single pulse sequence is produced at the outputs Hint This switch is mechanically latched and therefore protected against accidental switching over Please pull out the toggle before performing a change in switch position PMG 02_Bed_Anleitung_v1 32_oce_eng doc 01 08 2006 M Billmann 11 18 Examples for application Continuous waveform Testing gate driver circuits in terms of power dissipation current consumption general functionality Single pulse Short circuit test e g preset 10usec pulse length feed back a suitable generated error message into the generator s error input to guarantee a pulse width reduction to prevent a system overload Evaluation of switch OFF losses Double pulse Commutation Reverse recovery behaviour of diodes Switch ON losses Multi pulse start up a resonant system and evaluate a steady resona
17. us LEDs remark options default deadtime last pulse freeze power on yellow PMG 02 is in default mode means no deadtime last pulse length about 15usec kb yellow red coarse adjust deadtime up to about 160usec push off deadtime gt 0 default LED turns off red deadtime lt 0 default LED red as additional warning oe yellow yellow fine adjust deadtime in 20nsec steps push off deadtime gt 0 default LED turns off red deadtime lt 0 default LED red as additional warning 3 yellow off red last pulse is as long as previous pulses means push red long default LED is red at negative deadtimes 4 yellow orange Pulse length adjustment of last pulse maximum push off default length is about 80usec but max as long as previous red pulses At extremely long previous pulses length will yellow jump from 80usec directly to max pulse length of red long previous pulses LED will turn red then Si yellow off yellow Al setup adjustments are freezed accidentially turning push red the encoder will not change the setup 6 yellow Jump back into default mode made adjustments push keep stored until power is turned off Hint Powering down the PMG 02 will erase all adjustments made in the encoder menue The PMG 02 will restart in default mode PMG 02_Bed_Anleitung_v1 32_oce_eng doc 01 08 2006 M Billmann 14 18 Hint If deadtime 0 is set by encoder deadtime will jitter 20nsec
18. uttom additionally must be pressed to take over the actual preset values 5 3 Select logic mode and logic level At first please start to select the definition for the output logic 1 Select the output voltage level Usut 15 Control the output voltage e g with a voltmeter at BNC output 16 Uout turn to left stop lt 5V Uu turn to right stop gt 15V Hint Logic levels from 2 5V to 7 5V can be accieved by insertion of a 50Q feed through adapter which will divide the output voltage level by two Attention Take maximum power rating of these feed through units into consideration PMG 02_Bed_Anleitung_v1 32_oce_eng doc 01 08 2006 M Billmann 9 18 2 Selection of logic modes with mode switches Ch A CH_B 21 Please choose from the diagram below switch position operating Pulse form level in error mode mode A mode P CH A CH RB CH A CH PB upper lower l LI OV OV upper middle l OV OV OV upper upper l l OV OV lower lower JI 1 Uout Uout lower middle tt Uout Uout Uout lower upper tt l Uout Uout middle lower Uout Us Uout OV middle middle OV OV OV OV middle upper OV l OV Uout Hint These switches are mechanically latched to prevent an ac cidental unwanted switch over To change the switch position please first pull out the toggle and then change the position The PMG 02 is optional availiable with non latching toggle switches Opposite
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