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Appendix

 

ET

 

System

 

electronic

 

GmbH

 

 

 

49

 

 
 

ET

‐

System

 

Rippel

 

Measurment

 

Specification

 

Theoretical

 

Analysis

 

The

 

component

 

of

 

the

 

output

 

ripple

 

is

 

built

 

by

 

the

 

output

 

current

 

and

 

the

 

equivalent

 

series

 

resistor

 

of

 

the

 

output

 

capacitor.

 

Picture

 

1

 

show

 

a

 

basic

 

circuit

 

which

 

was

 

used

 

to

 

simulate

 

the

 

ripple.

 

 

Picture

 

2

 

show

 

the

 

ripple

 

without

 

spikes.

 

Picture

 

2

 

shows

 

also

 

the

 

different

 

between

 

the

 

used

 

measurement

 

bandwidth.

 

At

 

this

 

example

 

the

 

switching

 

frequency

 

of

 

the

 

converter

 

was

 

80kHz

 

(this

 

is

 

also

 

the

 

switching

 

frequency

 

of

 

the

 

LAB/HP

 

and

 

LAB/SMS

 

series).The

 

red

 

line

 

shows

 

the

 

measured

 

ripple

 

by

 

using

 

a

 

bandwidth

 

of

 

20MHz

 

and

 

the

 

blue

 

line

 

shows

 

the

 

measured

 

ripple

 

by

 

using

 

a

 

measure

 

bandwidth

 

of

 

300kHz.

 

 

This

 

example

 

shows

 

that

 

the

 

measurement

 

bandwidth

 

have

 

a

 

strong

 

influence

 

of

 

the

 

measurement

 

result.

 

 

The

 

spike

 

or

 

noise

 

of

 

the

 

ripple

 

will

 

generate

 

by

 

the

 

switching

 

noise

 

of

 

the

 

power

 

supply.

 

The

 

spikes

 

which

 

will

 

be

 

measured

 

strongly

 

depend

 

on

 

the

 

used

 

measurement

 

method.

 

One

 

point

 

is

 

the

 

using

 

measurement

 

bandwidth

 

the

 

other

 

point

 

is

 

the

 

test

 

setup.

 

The

 

influence

 

of

 

the

 

measurement

 

method

 

is

 

show

 

at

 

picture

 

4.

 

Picture

 

3

 

show

 

the

 

previous

 

know

 

circuit

 

and

 

also

 

the

 

same

 

circuit

 

with

 

some

 

added

 

leakage

 

component

 

how

 

are

 

contribute

 

to

 

the

 

output

 

noise.

 

  
 

This

 

example

 

show

 

that

 

the

 

measurement

 

bandwidth

 

do

 

influence

 

the

 

spikes

 

or

 

noise

 

measurement.

 

 
 
 
 
 
 
 
 
 
 

Содержание LAB-HP

Страница 1: ...ET System electronic GmbH Telefon 06205 3948 0 Fax 06205 37560 Hauptstra e 119 121 info et system de 68804 Altlu heim www et system de LAB HP...

Страница 2: ...Software version V178 May 2021...

Страница 3: ...face parameter Option 9 Front Panel Operation 9 Console and Rotary Pulse Encoder 9 Display and Settings 9 Current measurement values Display 9 Main display 10 UI display 10 Operating modes 10 Operatin...

Страница 4: ...ace Reconfiguration 34 Data Log Function Option 34 format of the saved Data 34 Script Mode 35 Executing Loading a Script 35 Commands 35 Syntax 35 Quick view of commands 35 Detailed description of comm...

Страница 5: ...evelopment division we can fast and flexibly adjust to our customers requirements Necessary approvals such as CSA UL VDE T V etc are flexibly carried out by qualified personnel The approval procedures...

Страница 6: ...05 Nominal Current Internal Fuse3 20 A 40 A 60 A 80 A 120 A 180 A 240 A Breaking Capacity Fuse Automatic Fuse3 built in Circuit Breaker KLK 20 A Recommended Supply Breaker value and curve 16 A Type D...

Страница 7: ...ible load resistance 2 k Imax 5 mA Minimum load resistance for 0 1 accuracy 100 k Analog inputs Xset Input resistance 1 M Maximum permissible input voltage 25 V Reference voltage Reference voltage Ure...

Страница 8: ...Technical Specifications 4 ET System electronic GmbH TECHNICAL DRAWING...

Страница 9: ...ed in case it needs to be transported in the future or claims for compensation need to be asserted SETTING UP To avoid electric shocks and product failure the device should be installed in a temperatu...

Страница 10: ...age is calculated by means of the present output current to simulate an internal resistance Table mode Set values for current and voltage are saved in a table Therefore UI characteristics can be easil...

Страница 11: ...ermanently Control via analog interface Connect the AI interface like the wiring diagram on page 27 Close the Extern control switch The adjustment of set points and the selection of an operation mode...

Страница 12: ...value irrespective of the values that have been set at the front panel or at one of the interfaces The adjustment range is 0 V up to the maximum rated voltage of the device Ilimit limits the maximum...

Страница 13: ...meters can be selected by pushing the rotary pulse encoder and changed by turning the rotary pulse encoder function of the parameters Universal Interface FRONT PANEL OPERATION CONSOLE AND ROTARY PULSE...

Страница 14: ...Voltage current and power limitation UIR Voltage and current limitation simulated internal resistance PVsim simulation of a photovoltaic characteristic User simulation of a user defined characteristi...

Страница 15: ...ble internal resistance is simulated The set value for current limiting is transferred directly to the switch mode regulator PVsim Mode In PVsim mode the diagram of a PV generator is simulated Given v...

Страница 16: ...nal after a numerical value a letter may be added to indicate the unit However this letter will not be analyzed Example Attached letter as unit UA 10 0 V Resets output voltage to 10 V UA 10 0 m Cautio...

Страница 17: ...oller parameters for UIP UIR and PVsim mode RI or RST Reset Instrument Resets hardware no return value SB S R 1 0 Standby Enables blocks the output SCR CMD value Load Script Programming of script memo...

Страница 18: ...SB R Output open IA 400 Output current 400 A this command is ignored because the current is higher than the maximum current of the device Rangeerror is set within the status byte IA 250 Output current...

Страница 19: ...within UIR mode Example LIMRMAX Query of maximum adjustable internal resistance LIMRMAX 1 000R Unit answers 1 Ohm LIMRMIN Limit Rmin With this command the user can read the minimum adjustable range f...

Страница 20: ...UIR MODE 2 UIR mode is activated MODE PVSIM MODE 3 PVsim mode is activated MODE USER MODE 4 User defined UI characteristic is activated The characteristic is defined with the commands DAT WAVE WAVELIN...

Страница 21: ...ed OVP 200 Over voltage protection 200 V UA 100 Output voltage 100 V IA 10 Output current 10 A PA 500 Power limitation 500 W SB R Output open In master slave mode the power of a programmed device is a...

Страница 22: ...the PCx command with the command SS No return value Example PC1 Query of first interface parameters PC1 RS232 9600 N 8 2 N E Unit answers PC1 is a RS232 interface 9600 bauds 8 data bits 2 stop bits no...

Страница 23: ...or UIR mode SS Save new settings RI or RST Reset Instrument The unit executes a hardware reset No return value SB S R 1 0 Standby This command enables disables the output Entering the command without...

Страница 24: ...1 unit in standby mode D0 OVP 1 shut down by over voltage protection Example STATUS Status query STATUS 0000000100010000 Unit answers Remote operation mode power limitation UA Umax Set Umax This comm...

Страница 25: ...l voltage is n x UMPP WAVE End Userwave Data This command ends the transfer of a user defined output characteristic Interpolation of interim values is layered For detailed information about the functi...

Страница 26: ...he decimal point depend on the present measurement value Example 600 V unit UA 10 4V UA 220 3V UA 1 1V Example 50 V unit UA 1 23V UA 10 47V UA 0 01V EXT CONTROL COMPUTER GPIB Connection is carried out...

Страница 27: ...On On On Off 15 On On On On On 31 The device address is read in only when the unit is switched on Changing the DIP switches while the unit is active will not change the device address Table Device eq...

Страница 28: ...connection of the RS232 interface is carried out with a 9pin sub D connector A null modem cable must be used as connector cable No Name Function 1 N C 2 TxD Data line from unit to PC 3 RxD Data line f...

Страница 29: ...used internally can be 1 or 0 D2 Table D1 Table D0 Table Table Error messages D2 D1 D0 Error 0 0 1 Syntax 0 1 0 Command 0 1 1 Range 1 0 0 Unit 1 0 1 Hardware 1 1 0 Read If echo is on the interface co...

Страница 30: ...bits 0 1 Stop bit D4 Data format 1 8 bit 0 7 bit D3 n a D2 Table D1 Table D0 Table Table Error messages D2 D1 D0 Error 0 0 1 Syntax 0 1 0 Command 0 1 1 Range 1 0 0 Unit 1 0 1 Hardware 1 1 0 Read Inter...

Страница 31: ...Monitor output current 22 pwr 5 V Output 5 V supply voltage 23 gnd GND 24 digital out Error Signals shut down by OVP 25 gnd GND 26 nc All digital outputs are OC outputs with a pull up resistance after...

Страница 32: ...oltage Measurement value refers to the rated voltage of the device Example LAB HP at 600 V output voltage AI is adjusted to 10 V voltage at output Umon 2 V Present set point Uset 2 V 600 V 10 V 120 V...

Страница 33: ...ver the AI interface The settings from AI interface have no effect if the device is toggled to Remote Soft Interlock The Interlock deactivates the unit immediately when the connection between interloc...

Страница 34: ...idual permanent IP address should be assigned The easiest way to check the IP of the device is by starting latronix device installer software Click search Now your network gets scanned for devices You...

Страница 35: ...o set a static IP for the device you have to click Webconfig There you can set the new IP of the device Uncheck dynamic IP MONITORING THE DEVICE VIA BROWSER The user interface opens via direct request...

Страница 36: ...d or command have been entered a DOS window opens with telnet xxx xxx xxx xxx 10001 Alternatively many terminal programs offer the possibility to establish a TCP IP or telnet connection When controlli...

Страница 37: ...error D13 Framing error D12 Timeout error D11 Echo on D10 used internally can be 1 or 0 D9 Hardware handshake RTS CTS D8 Software handshake XON XOFF D7 Parity enable D6 Parity mode 1 odd 0 even D5 St...

Страница 38: ...rd must be inserted or removed in standby mode only In case that the first entry of the first line of the file is interval xxxx xxxx time in seconds the memory interval is adjusted accordingly The ent...

Страница 39: ...een two commands or between command and parameter Valid delimiters are blank tabulator LineFeed LF Carriage Return CR and equal sign Numerical values must be placed as basic units and may not be follo...

Страница 40: ...A IMPP Set point MPP current This command adjusts the set point for the MPP current for PV simulation in ampere Example IMPP 8 123 MPP current 8 123 A LOOP LOOPCNT Return Loop Usually the script ends...

Страница 41: ...ivate output STANDBY Deactivate output The command STANDBY deactivates the output and activates standby mode Example STANDBY Deactivate output U Set point output voltage Set point for output voltage i...

Страница 42: ...of the script WAIT Waits until rotary pulse encoder is pushed U 10 5 1 ramp U 9 Command is processed within 1 ms Therefore the U 7 5 ramp has 5 interim values U 6 U 4 5 DELAY 15 15 ms pause U 4 8 2 ra...

Страница 43: ...may not be predicable Example Characteristic with layered interim values This script delivers the blue characteristic in the diagram WAVE Start of the table 100 10 100 V 10 A 50 25 50 V 25 A 10 100 1...

Страница 44: ...00 10 V 100 A WAVE End of the table U 100 Output Voltage 100 V I 100 Output Current 100 A USER Select characteristic RUN Output open DELAY 10000 Wait 10 seconds U 50 Output Voltage 50 V I 50 Output Cu...

Страница 45: ...the open circuit voltage of the table In PVsim mode the current is regulated while the voltage is fixed CONTROL STRUCTURE UIP MODE The output voltage is multiplied with the output current The result...

Страница 46: ...ential by a difference The following equation puts the controller into practice within the software Parameters P I and D are calculated as follows Controller parameters can be programmed via digital i...

Страница 47: ...larity to the load distribution point connect sense and sense conductors to a 1 47 F capacitor protect sense cable or at least twist sense and sense select load line cross section so that voltage drop...

Страница 48: ...at least the largest consumers are supplied centrally MASTER SLAVE MODE M S MODE In master slave mode multiple LAB HP units are connected via the ETS Bus To establish the connection any commercially...

Страница 49: ...ocal lockout both units cannot be operated via front panel This status is indicated on both displays by the word LLO Note Master Slave mode is currently not working in combination with memory card If...

Страница 50: ...re exchanged via bus only The display equals the standard display OVERVIEW OF THE CONNECTED UNITS Pushing the button Display twice will open a menu which displays the data of the first four LAB HP uni...

Страница 51: ...t current MI 28 4A Unit answers 28 4 A MI 0 Measures present current of the first device MI 9 1A Unit answers 9 1 A GTR Remote Operation Mode active MI 9 4A Unit answers 9 4 A MI 2 Measures present cu...

Страница 52: ...allel which doubles or triples the measured leakage current This is permissible according to the norm Quotation from the norm of 2008 appendix D When measuring protection conductor currents with the e...

Страница 53: ...asured ripple by using a bandwidth of 20MHz and the blue line shows the measured ripple by using a measure bandwidth of 300kHz This example shows that the measurement bandwidth have a strong influence...

Страница 54: ...ve a bandwith of 300kHz This rippel circuit was build at the labortory and was tuned by using a frequency analyser Bode 100 Also the used 1 1 Oscilloscope probe was during the tuning procedure connect...

Страница 55: ...ET System electronic GmbH 51 NOTES...

Страница 56: ...Notes 52 ET System electronic GmbH...

Страница 57: ...Notes ET System electronic GmbH 53...

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