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Sorensen DCS-E Series 3kW Supplies

Theory of Operation

M362295-01 Rev D

5-13

O

UTPUT

V

OLTAGE AND

C

URRENT

R

EADBACK

C

IRCUITS

These circuits provide calibrated, switch-selectable 0-5V or 0-10V analog readback signals for
remote monitoring of the output voltage and current. The output voltage readback signal is
available at pin 19 of the rear panel J3 connector and the current readback signal is available at
pin 7.

The voltage readback circuit is made up of op amp U6, switch SW1-4, calibration pots R55
and R56, and resistors R52, R53, R54, and R57. The op amp monitors the output voltage of the
supply through the positive sense divider formed by resistors R6, R7, R44, and R43. For 0-5V
readback, switch SW1-4 is CLOSED and resistors R53, R54, R57, and trimpot R56 scale and
calibrate the monitor signal. Trimpot R55 is use to null any output offset. For a 0-10V readback
signal, switch SW1-4 is OPEN, removing resistor R53 from the scaling resistors.

Operation of the current readback circuit is the same as the voltage readback circuit. The
circuit is made up of op amp U2, switch SW1-3, calibration pots R23 and R24, and resistors
R19, R20, R21, and R25. The input to the op amp is from the current shunt amplifier through
the divider formed by resistors R22 and R26.

O

VER

-

TEMPERATURE

S

HUTDOWN

C

IRCUIT

The over-temperature shutdown circuit monitors the temperature of the A6 PCB input
rectifier heatsink, the A3 PWM heatsink, and the output rectifier heatsink, using thermal
sensors RT1, RT2, and RT3 respectively.

When the heatsink temperature reaches approximately 100°C, the output of U7-B goes
negative, causing the output of U7-D to go high. This activates the internal shutdown
circuit and the PWM shutdown lines through diodes CR16 and CR15. The front panel OTP
(over-temperature protection)

LED is illuminated through resistor R28. The J3 remote monitor

line is fed by resistor R18. The IEEE-488 monitor line is activated through pin 5 of connector
P2.

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Содержание Sorensen DC Series

Страница 1: ...62295 01 Rev D www programmablepower com DCS E 3kW Series DC Power Supplies Operation Manual This manual covers models DCS8 350E DCS55 55E DCS12 250E DCS60 50E DCS20 150E DCS80 37E DCS40 75E DCS150 20...

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Страница 5: ...s only Notice of Copyright DCS E 3kW Series DC Power Supplies Operation Manual 2006 2008 AMETEK Programmable Power Inc All rights reserved Exclusion for Documentation UNLESS SPECIFICALLY AGREED TO IN...

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Страница 7: ...nnel and equipment safety Always ensure that facility AC input power is de energized prior to connecting or disconnecting any cable In normal operation the operator does not have access to hazardous v...

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Страница 9: ...the instructions of AMETEK is opened modified or disassembled in any way without AMETEK s consent or is used in combination with items articles or materials not authorized by AMETEK The Buyer may not...

Страница 10: ...vi This page intentionally left blank...

Страница 11: ...led schematics and circuit descriptions available on our website www programmablepower com will enable greater flexibility in troubleshooting and in configuring new applications Section 1 Introducing...

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Страница 13: ...ECTION 2 INSTALLATION 2 1 2 1 Introduction 2 1 2 2 Safety 2 1 2 2 1 High Energy High Voltage Warning 2 1 2 2 2 AC Source Grounding 2 2 2 2 3 Operating and Servicing Precautions 2 2 2 2 4 Parts and Mod...

Страница 14: ...ctions 2 11 2 7 3 Connecting Single Loads 2 12 2 7 4 Connecting Multiple Loads 2 12 SECTION 3 BASIC OPERATION 3 1 3 1 Introduction 3 1 3 2 Standard Operation 3 1 3 2 1 Operating Modes and Automatic Cr...

Страница 15: ...act Closure 4 19 4 6 Remote Monitoring of Readback Signals and Status Indicators 4 21 4 6 1 Readback Signals 4 21 4 6 2 Status Indicators 4 21 4 7 Using Multiple Supplies 4 22 4 7 1 Configuring Multip...

Страница 16: ...Output Filter Inductor and Capacitor and Down Programmer Circuit A4 PCB A7 PCB A8 PCB and Power Stage Assembly 5 6 5 3 5 Auxiliary Supply OVP Control Programming Monitor Circuit A2 PCB 5 7 5 3 6 Front...

Страница 17: ...6 Strain Relief Assembly 2 7 Figure 2 7 Connector J3 Default Configuration 2 8 Figure 2 8 Maximum Load Wire Length 2 11 Figure 2 9 Single Load with Local Sensing Default 2 12 Figure 2 10 Single Load...

Страница 18: ...14 Using Shutdown with a TTL Compatible Positive Logic 4 17 Figure 4 15 Using Shutdown with a TTL Compatible Negative Logic 4 17 Figure 4 16 Using Shutdown with an AC or DC Input Positive Logic 4 18...

Страница 19: ...90 250 Vac Three Phase 47 63 Hz or 200 250 Vac Single Phase 47 63 Hz Output power limited to 2500W for single phase input Simultaneous digital display of both DC output voltage and current Ten turn po...

Страница 20: ...37 mA 150 mV 20 mA Meter Accuracy Voltage Current 0 09V 4 5A 0 13V 3 5A 0 2V 0 1 6A 0 5V 0 85A 0 65V 0 65A 0 7V 0 6A 0 9V 0 47A 1 6V 0 30A OVP Adjustment Range 0 4 8 8V 0 6 13 2V 1 22V 2 44V 2 75 60...

Страница 21: ...ge 55 to 85 C Humidity Range 0 80 Non condensing Time Delay from power on until output stable 5 seconds maximum Switching Frequency Nominal 30 kHz 60 kHz output ripple Voltage Mode Transient Response...

Страница 22: ...Introduction Sorensen DCS E Series 3kW Supplies 1 4 M362295 01 Rev D Figure 1 1 DCS E Series 3kW Supply Front Panel Controls and Indicators...

Страница 23: ...Sorensen DCS E Series 3kW Supplies Introduction M362295 01 Rev D 1 5 Figure 1 2 DCS E Series 3kW Supply Rear Panel Connectors and Terminals including optional internal GPIB Interface...

Страница 24: ...Introduction Sorensen DCS E Series 3kW Supplies 1 6 M362295 01 Rev D This page intentionally left blank...

Страница 25: ...ation Remote Programming operation monitoring and programmable functions are described in Section 4 Advanced Operation 2 2 SAFETY Please review the following points for both personal and equipment saf...

Страница 26: ...e voltages or frequencies in excess of those specified may cause leakage currents in excess of 5 0 mA peak from the AC line to the chassis ground 2 2 3 Operating and Servicing Precautions Exceeding th...

Страница 27: ...or component damage Reinstall cover If damage is found to have occurred save all packing materials and notify the carrier immediately Refer to the terms of the warranty Direct repair problems to the m...

Страница 28: ...ollowing part numbers Chassis Mounted Parts Housing Tyco 641685 1 Contact Pins Tyco 350821 1 Mating Connector Parts Connector Housing Tyco 643267 1 Contact Pins Tyco 350821 1 2 5 1 AC Input Power Conn...

Страница 29: ...821 1 ADDITIONAL PARTS REQUIRED 8 to 12 AWG wiring three 3 wires for single phase inputs or four 4 wires for three phase inputs The neutral CONNECTOR wire of three phase four 4 wire systems is not req...

Страница 30: ...train relief is assembled from supplied pieces and attaches to the AC input connector to provide support for the AC input cord PARTS SUPPLIED Two 2 pieces strain relief Part number MI 6432 661 Tyco 64...

Страница 31: ...d strain relief tab A into AC input connector slot C See Figure 2 6 4 Install screws in holes provided on outside of strain relief pieces Thread through to screw standoff inside opposite piece Tighten...

Страница 32: ...5 seconds before powering on again 2 Turn the voltage and current controls fully counter clockwise 3 Connect the unit to an AC outlet 4 Turn the front panel AC power switch ON After a short power on d...

Страница 33: ...be illuminated 2 6 4 Front Panel Function Checks 1 Press OVP CHECK switch and check that the voltmeter displays approximately the model rated output voltage plus 10 2 Turn OVP SET potentiometer counte...

Страница 34: ...the load is shorted The table below shows the maximum current rating based on 450 amps per square centimeter for various gauges of wire rated for 105 C operation Operation at the maximum current ratin...

Страница 35: ...aking the Connections Load connections to the power supply are made at the positive and negative output terminals or bus bars at the rear of the power supply Refer to the rear panel diagram in Figure...

Страница 36: ...nsing 2 7 4 Connecting Multiple Loads Proper connection of distributed loads is an important aspect of power supply applications Two common methods of connection are the parallel power distribution me...

Страница 37: ...or a distinct set of terminals especially established for distribution use Connecting the sense leads to these terminals will compensate for losses and minimize the effect of one load upon another Fig...

Страница 38: ...Installation Sorensen DCS E Series 3kW Supplies 2 14 M362295 01 Rev D This page intentionally left blank...

Страница 39: ...ating modes Constant Voltage Mode and Constant Current Mode and two control modes Local Programming Mode default setting and Remote Programming Mode Both operating modes are available regardless of wh...

Страница 40: ...nce is low enough that the load current IL is greater than the current limit setting ISET or IL ISET In constant current mode the power supply maintains the output current at the selected value ISET w...

Страница 41: ...nitoring See Section 4 2 Configuring for Remote Programming Sensing and Monitoring Figure 3 2 Local Mode Default Configuration SETTING OUTPUT VOLTAGE AND CURRENT LIMIT After installing the power suppl...

Страница 42: ...nergy before altering J3 connector pin connections 2 Remove the local sense jumpers connecting J3 pins 13 to 25 positive sense and pins 12 to 24 negative sense or return sense 3 Connect the positive s...

Страница 43: ...rensen DCS E Series 3kW Supplies Basic Operation M362295 01 Rev D 3 5 Figure 3 3 Connecting Remote Sense Lines CAUTION Do not use remote sensing with multiple supplies connected in series or in parall...

Страница 44: ...Basic Operation Sorensen DCS E Series 3kW Supplies 3 6 M362295 01 Rev D This page intentionally left blank...

Страница 45: ...mal shutdown OVP status remote local programming mode and voltage current mode operation Section 4 6 Calibrated Readback Signals for output voltage and output current with selectable 0 5V or 0 10V sca...

Страница 46: ...e programming When set to REM Remote Programming control of BOTH output voltage AND current limit is passed to external voltage and or current sources which are connected to the J3 connector Resetting...

Страница 47: ...Sorensen DCS E Series 3kW Supplies Advanced Operation M362295 01 Rev D 4 3 Figure 4 1 Connector J3 Pin Descriptions for Remote Programming Remote Monitoring and Sense Connections...

Страница 48: ...ale factor over voltage protection OVP programming mode and scale voltage and current monitor range and shutdown circuit logic 4 2 2 Locating Jumpers Switch and Connector Switch SW1 and jumpers JMP1 a...

Страница 49: ...d near the front panel six 6 near the rear panel Use a 1 Philips screwdriver 3 Loosen but do not remove the six 6 Philips screws located three 3 to a side in the slots along each side of the power sup...

Страница 50: ...s or making connections to external devices such as voltage sources current sources or resistances Read Section 2 2 Safety and follow the procedures in this section whenever the rear panel connector J...

Страница 51: ...pported for the DCS E Series 3kW supply Refer to Section 4 3 1 for a procedure and a connection diagram for programming output voltage and current limit using the REM LOC switch Subsequent sections pr...

Страница 52: ...ut voltage and current limit with external voltage and or current sources For programming output voltage and current limit using the REM LOC switch 1 Connect the programming source between pins 9 volt...

Страница 53: ...0 of the model rating The output current limit may be programmed using another source or set locally by adjusting the front panel current limit control Figure 4 4 Programming Output Voltage with a 0 5...

Страница 54: ...Resetting Jumpers and Switch PROGRAMMING OUTPUT VOLTAGE WITH A 0 1 MA SOURCE 1 Remove the jumper between pins 20 and 21 of connector J3 2 Connect the external programming source between pin 9 voltage...

Страница 55: ...put positive and 21 1 mA current source for voltage control to the counter clockwise end of the 5k potentiometer and connect the tap and clockwise end of the potentiometer to pin 12 return Adjusting t...

Страница 56: ...Output Current Limit with a 0 5 Vdc Source PROGRAMMING OUTPUT CURRENT LIMIT WITH A 0 10 VDC SOURCE 1 Set jumper JMP2 to its A B location 2 Remove the jumpers connecting pins 10 to 11 and 22 to 23 on c...

Страница 57: ...voltage from 0 to 100 of the model rating Adjusting the front panel voltage control sets the output voltage Figure 4 10 Programming Output Current Limit with a 0 1 mA Source PROGRAMMING OUTPUT CURRENT...

Страница 58: ...t any time by pressing the OVP CHECK switch the OVP set point is the value displayed on the digital voltmeter To set the trip level from the front panel 1 Adjust the power supply output to zero volts...

Страница 59: ...ween pin 3 positive and pin 12 return on the J3 connector on the rear panel See Figure 4 12 and Figure 4 13 The use of shielded twisted pair wiring is recommended Ground the shield to J3 connector pin...

Страница 60: ...voltage and current fall to zero and the S D Shutdown LED on the front panel is illuminated Pushing the switch once more resets it to its OUT position and normal power supply operation is resumed 4 5...

Страница 61: ...15 3 Set internal switch SW1 8 to select the desired circuit logic as defined in the table below Switch SW1 8 Setting TTL Signal Level Output Condition OPEN Positive logic HIGH OFF LOW ON CLOSED Nega...

Страница 62: ...e AC or DC source to pin 1 positive and pin 2 return on the J3 connector on the rear panel See Figure 4 16 and Figure 4 17 3 Set internal switch SW1 8 to select the desired circuit logic as shown in t...

Страница 63: ...e external relay to pin 15 15 Vdc Auxiliary Output on connector J3 Connect the other side of the relay to pin 14 TTL Shutdown Input Also connect pin 2 Shutdown Return to pin 6 Auxiliary Supply Ground...

Страница 64: ...v D Figure 4 19 Using Shutdown with Contact Closure of a Normally OPEN Relay Negative Logic Figure 4 20 Using Shutdown with Contact Closure of a Normally CLOSED Relay Positive Logic Figure 4 21 Using...

Страница 65: ...ignal Range Signal Return Switch Setting Output Voltage Pin 19 Pin 12 SW1 4 CLOSED 0 5 Vdc OPEN 0 10 Vdc Output Current Pin 7 Pin 12 SW1 3 CLOSED 0 5 Vdc OPEN 0 10 Vdc The readback signal represents 0...

Страница 66: ...output terminal of the next supply See Figure 4 22 The total voltage available is the sum of the maximum voltages of each supply add voltmeter readings The maximum allowable current for a series stri...

Страница 67: ...y Note When operating multiple supplies in parallel the operating mode of each supply will depend on the load current being drawn For example with two DCS 60 50E power supplies operating in parallel w...

Страница 68: ...the negative output terminal of one supply to the positive output terminal of the second supply The positive output terminal of the first supply then provides a positive voltage relative to the common...

Страница 69: ...tive Negative Supply Local sense lines shown are default J3 connections 4 8 OUTPUT VOLTAGE BIASING The power supply output may be biased up to a maximum of 400 Vdc with respect to the chassis WARNING...

Страница 70: ...Advanced Operation Sorensen DCS E Series 3kW Supplies 4 26 M362295 01 Rev D This page intentionally left blank...

Страница 71: ...g of active and passive components such as op amps transistors resistors capacitors diodes transformers and inductors 5 2 BASIC FUNCTIONAL BLOCKS The DCS E 3kW Series supply is a single isolated outpu...

Страница 72: ...PCB into a variable duty cycle 30 kHz waveform which is applied to the primary winding of the power transformer Feedback signals from the A2 PCB voltage and current control circuits and a current sens...

Страница 73: ...ming circuit and provide a control signal for the A3 PCB PWM circuit Thermal sensors monitor the temperature of the input rectifier heatsink the main switching transistor heatsink and the output recti...

Страница 74: ...y Schematics for links to the Elgar website to access illustrations of the following assemblies 1 AC Input and RFI Filter Circuit A5 PCB 2 Input Rectifier and Inrush Limiting Circuit A6 PCB 3 PWM Sync...

Страница 75: ...Resistor R2 provides a discharge path for the bulk capacitor C2 on power down Capacitors C1 C3 and C4 provide noise filtering The initial power up inrush current to capacitor C2 is limited by resistor...

Страница 76: ...utput controls the charging rate of the PWM timing capacitor thereby synchronizing the two signals The PLL also serves to shut down the PWM whenever the sync signal from the A2 PCB is absent by applyi...

Страница 77: ...gative than the reference at pin 5 approximately 0 125 Vdc the output of U1 B goes positive and FET Q1 is turned on by U1 A through resistor R4 Resistor R1 acts as a current shunt for the down program...

Страница 78: ...On initial power up the output of U14 B is held low by a 5V reference signal on pin 6 As the raw supply voltage increases the voltage on pin 5 increases until at a raw supply voltage of approximately...

Страница 79: ...nt control circuits decreases and causes the output of the PWM error amplifier to decrease which reduces the output pulse width from the PWM and reduces the voltage and current output to the selected...

Страница 80: ...mit is necessary the J3 connector must be used to select the programming source In the voltage control circuit analog switches U4 C and U4 B select which of the three programming sources is enabled ac...

Страница 81: ...ector Diodes CR26 and CR27 clamp any out of range or reverse polarity inputs Trimpot R93 is used to null any offset voltage from U10 Trimpot R60 is used to calibrate the signal For programming with re...

Страница 82: ...h OPEN or 0 10V with the switch CLOSED REMOTE SHUTDOWN CIRCUIT AND THE FRONT PANEL STANDBY SWITCH The remote shutdown circuit and the front panel standby switch are used to disable the output of the s...

Страница 83: ...l switch SW1 4 is OPEN removing resistor R53 from the scaling resistors Operation of the current readback circuit is the same as the voltage readback circuit The circuit is made up of op amp U2 switch...

Страница 84: ...tput for the seven segment displays The A D conversions are done and the displays updated approximately three times per second In the voltage display circuit the 5V reference from the A2 PCB is divide...

Страница 85: ...EMOTE LOCAL SWITCH SW1 This press ON press OFF switch activates both the voltage and current remote programming selector circuits on the A2 PCB via P1 connector pin 19 See Section 5 3 5 for a descript...

Страница 86: ...Theory of Operation Sorensen DCS E Series 3kW Supplies 5 16 M362295 01 Rev D This page intentionally left blank...

Страница 87: ...servicing power supplies High energy levels can be stored at the output voltage terminals on all power supplies in normal operation In addition potentially lethal voltages exist in the power circuit...

Страница 88: ...hese steps Shut the power supply off immediately Disconnect it from the AC power source Check all load programming and monitoring connections and circuits Check the AC input for correct voltage and fr...

Страница 89: ...to the power supply output See Note 1 Apply 1 of program voltage e g 0 1 for 0 10Vdc or 0 05 for 0 5Vdc programming source Adjust R95 until the DVM indicates 1 of the rated output current e g 0 5A for...

Страница 90: ...embly Most assemblies consist of parts common to all DCS E Series 3kW model assemblies as well as parts that are model specific or differential Each of the parts and assemblies listed whether complete...

Страница 91: ...1 1 1068531 150 1068531 1 Driver Bridge PWM A3 5360351 03 5360111 01 5360351 02 5360111 01 5360351 02 5360111 01 5360351 02 5360111 01 5360351 02 5360111 01 5362297 01 5360351 02 5360111 01 5360351 02...

Страница 92: ...Maintenance Sorensen DCS E Series 3kW Supplies 6 6 M362295 01 Rev D This page intentionally left blank...

Страница 93: ...MBR30045CT 25 59A 100V One 1 MUR7015 10 24A 300V One 1 MUR3040PT 5 9A 500V One 1 MUR1560 5A 600V One 1 MUR758 Connect the diode in series with either supply output to prevent the battery from discharg...

Страница 94: ...us Forward Current ratings should be a minimum of 1 5 times the Power Supply maximum output current Heatsink may be required There also may be a need for higher voltage rated parts dependent on load c...

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