dc master for field supply unit 04-2005_e

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SIMOREG DC Master

6RA70 Series

Application

SIMOREG asa field supply unit

Microprocessor-Based Converters from 6kW to 2500kW

for Variable-Speed DC Drives

Edition 03



Edition 03 04.05

Siemens AG 2000 - 2005 All rights reserved

NOTE

This application documentation does not purport to handle or take into account all of the equipment

details or versions or to cover every conceivable operating situation or application.If you require more detailed information, or if special problems occur, which are not handled in enoughdetail in this document, please contact your local Siemens office.

The contents of this application documentation are not part of an earlier or existing agreement or legalcontract and neither do they change it. The actual purchase contract represents the complete liability ofthe A&D Variable-Speed Drives Group of Siemens AG. The warrant conditions, specified in the contractbetween the two parties, is the only warranty which will be accepted by the A&D Variable-Speed DrivesGroup. The warranty conditions specified in the contract are neither expanded nor changed by theinformation provided in this application documentation.

WARNING

These converters contain hazardous electrical voltages and control rotating mechanicalcomponents (drives). Death, serious bodily injury or substantial damage to property willoccur if the instructions in the relevant operating manuals are not observed.

Only qualified personnel who are thoroughly familiar with all safety notices contained in theoperating instructions as well as erection, operating and maintenance instructions must beallowed to work on these devices.

Successful and safe operation of this equipment is dependent on careful transportation,proper storage and installation as well as correct operation and maintenance.

The reproduction, transmission or use of this document or contents is

not permitted without express written authority. Offenders will be liable

for damages. All rights, including rights created by patent grant or

registration of a utility model or design, are reserved.

We have checked that the contents of this publication agree with the

hardware and software described herein. Nonetheless, differences

might exist and therefore we cannot guarantee that they are completely

identical. The information given in this publication is reviewed at regularintervals and any corrections that might be necessary are made in the

subsequent printings. Suggestions for improvement are welcome at all

times. SIMOREG ® is a registered trademark of Siemens



04.05 Edition 03

Siemens AG 3-18SIMOREG DC Master Application of SIMOREG as a field supply unit

0 Contents

Page

1 Appl ications 4 2 Block Diagrams 5 2.1 Version 1: Field supply with an internal setpoint 5 2.2 Version 2: Field supply with an external setpoint 6 2.3 Version 3: Field supply + armature supply 7 3 Parameter Lists 8 3.1 Version 1: Field supply with an internal setpoint 8 3.2 Version 2: Field supply with an external setpoint 8 3.3 Version 3: Armature supply + field supply 9 3.4 Armature supply + field supply + field reversal 10 4 Startup, Optimization 11 4.1

Version 1: Field supply with an internal setpoint 11

4.2 Version 2: Field supply with an external setpoint 11 4.3 Version 3: Armature supply + field supply 11 5 Overvoltage Protection 12 5.1 General information 12 5.2 Protection using varistors 14 5.3 Protection using thyristor modules 15 5.4 Damping resistors Rs 16 5.5 Magnetic field energy for Siemens motors 16



Edition 03 04.05

4-18 Siemens AG

SIMOREG DC Master Application of SIMOREG as a field supply unit

1 Applications

The SIMOREG DC Master devices of the 6RA70 series are used for the armature and field supply of DCmotors. The internal half-controlled bridge circuit of the field power section permits supply to motors with upto 40 A (85A with 6RA7096 and higher, 2200 to 3000 A armature current) rated field current. If higher fieldsupply currents are required, you can use a 6RA70 one-quadrant unit. In that case, the fully controlled three-

phase bridge circuit normally intended for the armature supply is used for the field supply.

Here are four different applications:

Version 1: The 6RA70 unit functions completely autonomously. A fixed internal field current setpoint isset. Field weakening is not possible.

Version 2: The 6RA70 unit is given an external analog field current setpoint. Field weakening can havean external source with this setpoint.

Version 3: The field supply unit (slave) functions in conjunction with a 6RA70 armature supply unit(master). Signals are exchanged via a peer-to-peer interface. The armature unit generates the

current setpoint for the field supply unit and receives the current actual value and fault signalsfrom it. Field weakening, incl. automatic optimization, is possible.

Version 4: As for version 3, but including field reversalIn order to allow contactless switchover, the field supply unit must be designed as a 4Qdevice!

In all four cases, it is not necessary to activate option S00.

This application is valid as of firmware version V1.9

WARNING

If the armature power section is used for the field supply, always include overvoltageprotection to protect the converter valves because if the input voltage fails the energy in thefield circuit cannot be reduced.

Please note that the overvoltage protection must be effective in both polarities for version 4with field reversal!

So as not to load the overvoltage protection unnecessarily, ensure that the field current isalready 0 when setting the pulse inhibit, e.g. by activating the zero-speed excitation becauseotherwise the residual energy of the field has to be eliminated via the overvoltage protection.



04.05 Edition 03


2 Block Diagrams

2.1 Version 1: Field supply with an internal setpoint

1U1 1V1 1W1 3U1 3W1

3AC

1C1(1D1)

1D1(1C1)

M

X171:36

X171:37

X171:38

X171:34

Ramp-functiongenerator

Speed controller Torque l imitat ion Current control ler

Precontrol

Current controller Current limitationEMF controller

Precontrol Precontrol

Armaturecontrol set

Field control

set

Armature current control

Field currentcontrol

Field supply

Overvoltage protection

Field current setpoint (P401)

Switchover tozero-speed field

Switch-on



Edition 03 04.05

6-18 Siemens AG


2.2 Version 2: Field supply with an external setpoint

1U1 1V1 1W1 3U1 3W1

3AC

1C1(1D1)

1D1(1C1)

M

X174:4

X171:36

X171:37

X171:38

X171:34

Ramp-functiongenerator

Speed controller Torque l imitation Current control ler

Precontrol

Current controller Current limitationEMF controller

Precontrol Precontrol

Armaturecontrol set

Field

control set

Armature current control

Field currentcontrol

Field supply

Overvoltage protection

External fieldcurrent setpoint

Switchover tozero speed field

Switch-on



04.05 Edition 03


2.3 Version 3: Field supply + armature supply

5 6

5 6

5 7

5 7

5 8

5 8

5 9

5 9

X 1 7 2

X 1 7 2

1 U 1

1 V 1

1 W 1

1 U 1

1 V 1

1 W 1

3 U

1

3 W 1

3 A C

3 A C

3 U 1

3 W 1

2 A C 4 0 0 V 1

C 1

( 1 D 1 )

1 D 1

( 1 C 1 )

M

1 C 1

( 1 D 1 )

1 D 1

( 1 C 1 )

X 1 7 1 : 3 7

X 1 7 1 : 3 8

X 1 7 1 : 3 4

R a m p - f u n c t i o n

g e n e

r a t o r

S p e e d c o n t r o l l e r

T o r q u e l i m i t a t i o n

C u r r e n t c o n t r o l l e r

P r e c o

n t r o l

C u r r e n t c o

n t r o l l e r

C u r r e n t l i m i t a t i o n

E M F c o n t r o l l e r

P r e c o n t r o l

P r e c o n t r o l

A r m a t u r e

c o n t r o l s e t

F i e l d

c o n t r o l s e t

A r m a

t u r e c u r r e n t c o n t r o l

F i e l d c u r r e n t

c o n t r o

l

R a m p - f u n c t i o n

g e n e r a t o r

S p e e d c o n t r o l l e r



P r e c o n t r o l



E M F c o n t r o l l e r

P r e c o n t r o l

P r e c o n t r o l

A r m a t u r e

c o n t r o l s e t

F i e l d

c o n t r o l s e t

A r m a t u r e c u r r e n t c o n t r o l


c o n t r o l

A r m a t u r e s u p p l y

F i e l d s u p p l y

O v e r v o l t a g e p r o t e c t i o n

P e

e r - t o - p e e r

l i n k


a c t u a l v a l u e

F i e l d c u r r e n

t



Edition 03 04.05

8-18 Siemens AG


3 Parameter Lists


Field supply unit

P076.001 Adaptation device rated DC armature. = Normalization of the actual field current

P076.002 Adaptation device rated DC field. Setting irrelevant because not used.

P078.001 Setting of line-to-line power section rated system voltage

P079 1 Enable long pulses armature trigger set. Required with field supply from the armature terminals

P082 0 Internal field not used

P083 4 Speed actual value freely interconnectable

P084 2 Current-controlled operation

P100 Rated armature current = In that case, the exciter current of the motor

P102 Setting irrelevant because not used

P153 3 Required with large inductances at the armature terminals

P179 >0 Additional alpha W pulses (approx. 3......7). Depending on the magnitude of the inductance. P401 Setpoint operating field 100% = Nominal device current of the armature circuit

P402 Setpoint zero-speed field 100% = Nominal device current of the armature circuit

P430.001 B0010 Injection zero-speed field via binary input Term.X171: 36 1...... zero-speed field

P431.001 K0402 Routing setpoint zero-speed field

P433 K0401 Routing setpoint operating field

P601.003 K0209 Routing field current setpoint

P609 K0000 Source speed actual value

P820.007 42 Masking of fault message "Tacho fault"

P821.001 35 Masking of alarm message "Drive blocked"


Field supply unit

P076.001 Adaptation device rated DC armature. = Normalization of the actual field current

P076.002 Adaptation device rated DC field. Setting irrelevant because not used.

P078.001 Setting of line-to-line power section rated system voltage

P079 1 Enable long pulses armature trigger set.Required with field supply from the armature terminals

P082 0 Internal field not used

P083 4 Speed actual value freely interconnectable

P084 2 Current-controlled operation

P100 Rated armature current = In that case, the exciter current of the motor

P102 Setting irrelevant because not used

P153 3 Required with large inductances at the armature terminals

P179 >0 Additional alpha W pulses (approx. 3......7). Depending on the magnitude of the inductance.

P402 Current setpoint for zero-speed field. 100% = Nominal device current of the armature circuit

P430.001 B0010 Injection zero-speed field via binary input Term.X171: 36 1...... zero-speed field

P431.001 K0402 Routing setpoint zero-speed field

P433 K0011 Routing setpoint operating field. Analog setpoint from Term.X174: 4

P601.003 K0209 Routing field current setpoint

P609 K0000 Source speed actual value

P820.007 42 Masking of fault message "Tacho fault"

P821.001 35 Masking of alarm message "Drive blocked"



Edition 03 04.05

10-18 Siemens AG


NOTICE

If a fault occurs on the field supply unit, the armature supply unit is switched off with "OFF 2" (voltagedisconnection).

3.4 Armature supply + field supply + field reversalThe following settings must be made in addition to those shown in Subsection 3.3:

P180.001 K0001 +100% pos. current limit for field direction 1

P181.001 K0000 0% neg. current limit for field direction 1

P182.001 K0000 0% pos. current limit for field direction 2

P183.001 K0003 -100% neg. current limit for field direction 2

P500.001 K0193 Excitation current setpoint after limitation

P580.1 Bxxxx Source for command "Direction of rotationreversal using field reversal" Section 8 / SheetG200

P581.1 Bxxxx Source for command "Braking with field reversal"

Section 8 / Sheet G200P601.003 134 Divergent from Subsection 3.3, set factory

setting K0134 here

P644.001 K6001 Excitation current setpoint of armature device

P671.001 B6201 B260 of armature device,enable pos. direction of rotation

P672.001 B6202 B261 of armature device,enable neg. direction of rotation

P694.001 B6202 B261 of armature device,switchover torque limits

U117.002 B260 Selection field torque direction 1

U117.003 B261 Selection field torque direction 2



04.05 Edition 03


4 Startup, Optimization

NOTE

If, during optimization for feedforward control and closed-loop current control, the value range of P110(armature circuit resistance > 32.767Ohms) or of P111 (armature circuit inductance > 327.67mH) isexceeded, the maximum possible value is entered in the relevant parameter and output at the end ofoptimization F050.

You can then read the details in the monitoring parameter r047 (display of the fault diagnostic memory).P155 (armature controller P-gain) and P156 (armature controller reset time) are always correctly setdespite that.

Optimization should be repeated with a warm field winding because the resistance of the field circuitlargely depends on the operating temperature.


♦ Setting of the parameters acc. to the list from Section 3.1

♦ Perform optimization for feedforward control and current controller (P051=25)For procedure to follow, see Section 7.5 of the instruction manual of the 6RA70.


Procedure as in Section 4.1

4.3 Version 3: Armature supply + field supply

Setting of the parameters acc. to the list f rom Section 3.2

Exception: P179. This parameter must not be set until the current controller has been optimized (applies to

firmware versions up to and including V2.0).Please keep to the following sequence when performing automatic optimization:

Field supply unit

Procedure:

♦ Connect P654 and P661 with B0421.

♦ Start optimization for feedforward control and current controller, i.e. set P051=25

♦ Input commands "Start" and "Enable operation" by specifying P421=1 (avoids the need to activate thearmature supply unit, optimization run can be aborted with P421=0 if required).

♦ Wait for the end of the optimization run.

♦ Set optimum values for P161 and P179, check current suppression using oscilloscope or the TraceMonitor (Trace2 / U_armature) (component of SIMOVIS or DriveMonitor)

♦ Check the optimization run settings, optimize again afterwards if required by assessing the stepresponse or recording the control loop parameters using an oscilloscope or Trace Monitor.



04.05 Edition 03


Maximum limiting voltage for rating overvoltage protection

Maximum permissible limiting voltage – dependent on motor field winding (maximum limiting voltage forSiemens motors is 2000 V), and the rated supply voltage for the converter, the lower value must be selected.

Rated supply voltage for 6RA70 converter at 1U1, 1V1, 1W1

3AC Limiting voltage DC400V 1350V

460V, 575V 1550V

690V 1700V

830V 2100V

950V 2500V

Magnetic energy content of field winding for rating overvoltage protection

The energy content for Siemens motors is shown in Subsection 5.5; if the energy content is not known, it canbe calculated on the basis of the field winding inductance.

W = L * Iexc2 /2, Rexc = Uexc / Iexc , L = 2 * W / Iexc

2,

W : Magnetic energy content in watt seconds

L : Inductance of field winding in henry

Iexc : Rated excitation current in amperes (see motor rating plate)

Rexc : Resistance of excitation winding in ohms

Uexc : Rated excitation voltage in volts (see motor rating plate)



Edition 03 04.05

14-18 Siemens AG


5.2 Protection using varistors

U

1C1 1D1

Rs

6RA70

Field supply unit

Varistor

Field winding

Rs.....Damping resistor

Metal oxide varistors w ith low energy content of field winding:

Up to 420 V rated supply voltage (for 400 V 6RA70 units):

Up to 400 Ws: Varistor SIOV-B32K460 made by Epcos: http://www.epcos.com

Up to 2000 Ws: Varistor SIOV-B80K460

Up to 500 V rated supply voltage (for 460 V and 575 V 6RA70 units)



Silicon carbide varistors w ith high energy content of field winding:Silicon carbide varistors can be supplied, for example, by Conradty in Nuremberg.

Silicon carbide varistors (e.g. of type series 820SB) are disk-shaped and can be connected in series or

parallel depending on the voltage and current requirement. There are no standard types.

Dimensioning is a service offered by Conradty and requires the following data:

♦ Application

♦ Type of converter circuit (B6C)

♦ Network voltage (nominal value + tolerance)

♦ Mean value of the output direct voltage

♦ Rated field current/voltage

♦ Magnetic field energy♦ Maximum limitation voltage

♦ Frequency of operating cycles

♦ Operating duration

♦ Ambient temperature

Source:C. ConradtyNürnberg GmbH & Co.KG D-90549 RöthenbachPostfach 1263Tel: +49 (0)911 5708-0

Fax: +49 (0)911 5708-211(Status November 2004)



04.05 Edition 03


5.3 Protection using thyristor modules

1C1 1D1

Rv

+ -

BOD

Rs

6RA70Field supply u nit

Field winding

Rv.....Series resistor (if required)Rs.....Damping resistor

The follow ing thyris tor protection modules can be supplied by Siemens:

Up to 420 V rated supply voltage (for 400 V 6RA70 units):

Order number: E89110-F2439-L1 (suitable for both current directions, 4Q)

Up to 500 V rated supply voltage (for 460 V and 575 V 6RA70 units):

Order number: E89110-B2350-L1 (suitable for one current direction 1Q. Two must be used in inverse-parallel connection for 4Q).

The resistors Rs and Rv are not supplied with the thyristor protection modules.

Thyristor protection modules are used in fields with an energy content > 2000Ws and field currents up to

approx. 500A. They are only suitable for protection in the event of a fault. If an overvoltage arises, thethyristor is fired via a BOD element (breakover diode) and remains conductive until the field energy has beeneliminated and the holding current of the thyristor is exceeded. In order to prevent the field unit fromsupplying the gated thyristor when the supply recovers, the automatic restart function for the 6RA70 shouldbe deactivated (set P086 = 0).

The following values are required to dimension the suppressor network:

♦ Largest operating load current

♦ Time constant τ of the free-wheeling circuit

R

L=τ

L Inductance of the field winding of the motor [H]

R Summated resistance field winding + supply leads + series resistance (if required) [Ω]

τ Time constant [s]

The magnitude of current and duration of current flow together determine the thermal load of the protectionthyristor.For the permissible currents depending on the time constant and information for rating a series resistance,see the instruction manual for the overvoltage protection module E89110.Documentation can be obtained from:

SIEMENS ERL F98SEDM

Frauenauracherstrasse 98D - 91056 Erlangen

Tel: +49 (0)9131 18 82329Fax: +49 (0)9131 18 84463(Status November 2004)



Edition 03 04.05

16-18 Siemens AG


5.4 Damping resistors Rs

Dimensioning for B6C circuit:

] A[5.0

]V[U35.1][R L

S∗

≤Ω

][R

]V[U3...2]W[P

S

2FN

V Ω

∗=

UL...... Line-to-line voltage at three-phase AC connection of converter

PV......Power loss of RS

UFN....Nominal field voltage

5.5 Magnetic field energy for Siemens motors

Mean values of magnetic field energy [Ws] with full excitation and forced-air cooling:

1GF …

1GG …1GH … Ws

1GF …

1GG …1GH … Ws

1GF …

1GG …1GH … Ws

1GF …

1GG …1GH … Ws

1GF …

1GG …1GH … Ws

... 5 102 3,5 ... 5 112 5,5 ... 5 132 21 … 5 162 45 … 6 162 115

… 5 104 5 ... 5 114 8,5 ... 5 134 30 … 5 164 60 … 6 164 150

… 5 106 7 ... 5 116 12 ... 5 136 35 … 5 166 75 … 6 166 190

… 5 108 10

1GG …

1GH … Ws

1GG …

1GH … Ws

1GG …

1GH … Ws

1GG …

1GH … Ws

1GG …

1GH … Ws

... 5 182 100 ... 6 186 185 … 5 252 340 … 6 256 540 … 5 312 730

... 5 184 125 ... 6 188 220 … 5 254 430 … 6 258 690 … 5 314 910

... 5 202 140 ... 6 206 250 … 5 282 480 … 6 286 780 … 5 352 980

... 5 204 170 ... 6 208 300 ... 5 284 600 … 6 288 950 … 5 354 1190

... 5 222 220 ... 6 226 360

... 5 224 280 ... 6 228 450

1GG …

1GH … Ws

1GG …

1GH … Ws

1GG …

1GH … Ws

1GG …

1GH … Ws

1GG …

1GH … Ws

... 7 351 850 ... 7 401 1400 ... 5 402 1220 ... 7 451 1350 ... 5 500 1260

... 7 352 960 ... 7 402 1650 ... 5 404 1500 ... 7 452 1650 ... 5 501 1740

... 7 353 1200 ... 7 403 1850 ... 5 406 1700 ... 7 453 2000 ... 5 502 2060

... 7 354 1380 ... 7 404 2200 ... 7 454 2400 ... 5 503 2480

... 7 355 1710 ... 7 405 2700 ... 7 455 3100 ... 5 504 3070

... 5 631 2740

... 5 632 3430

... 5 633 4140

... 5 634 4680

... 5 635 5890



04.05 Edition 03




Edition 03 04.05

SIMEASiemens Industrial ManufacturingEngineering and ApplicationsPO Box 83, A-1211 Wien

© Siemens AG, 2000-2005

Subject to change without prior notice

SIMOREG DC Master

Application of SIMOREG as a field supply unit

Printed in Austria

dc master for field supply unit 04-2005_e

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