6RA8096-4MV62-0AP0 - Siemens

SINAMICS DCM as

three-phase AC power

controller for heating

applications

SINAMICS DCM

https://support.industry.siemens.com/cs/ww/de/view/10975

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SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

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SINAMICS DCM DC Converter  Manual

https://support.industry.siemens.com/cs/ww/de/view/109478240

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

Table of contents

1 General information ........................................................................................... 4

2 Dimensioning ..................................................................................................... 4

3 Possible power topologies ............................................................................... 5

3.1 Topology 1: 6-conductor connection with load in a star

connection ............................................................................................ 5

3.2 Topology 2: Using an external power unit for the three-phase

AC power controller and an DCM Control Module ............................... 7

4 General settings and commissioning ............................................................ 11

5 Open-loop control mode ................................................................................. 13

5.1 Phase angle control ............................................................................ 14

5.2 Full-wave control ................................................................................ 15

5.3 Half-wave control ................................................................................ 17

5.4 Common functions for full and half-wave control ............................... 17

6 Soft start function ............................................................................................ 20

7 Line load equalization ..................................................................................... 22

7.1 Implementation example .................................................................... 23

8 Parameter overview ......................................................................................... 25

9 Appendix .......................................................................................................... 26

1 General information

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

1 General information

Under certain preconditions, SINAMICS DCM can be used as three-phase AC power

controller for heating applications - for example industrial ovens, tunnel drying ovens of

painting systems etc.

The load can either be ohmic (resistive) or inductive (e.g. transformers).

As a consequence, in certain cases, SIVOLT A three-phase AC power controllers can be

replaced by SINAMICS DCM converters.

Note

2Q devices represent a practical approach for these types of applications;

however, 4Q devices can also be used.

2 Dimensioning

Observe the following points when dimensioning a SINAMICS DCM:

1. It is not permissible that the phase-to-phase line voltage exceeds the amateur input

"ARMATURE INPUT" .

2. It is not permissible that the phase current of the heating system exceeds the input

current "ARMATURE INPUT" specified on the rating plate of the DCM .

3. As standard, the gating unit in the SINAMICS DCM and in the Control Module (factory

setting, frequency range 45 - 65 Hz) automatically adapt themselves to the line voltage.

An extended frequency range is possible on request.

4. For the full and half wave control modes, the power unit of the three-phase AC power

controller must be dimensioned for the specific load It is not permissible that it is under

dimensioned.

NOTICE

If the phase current of the heating system exceeds the input current

"ARMATURE INPUT" of the SINAMICS DCM, then external protective

measures must be provided to prevent the thyristors from being

overloaded.

Fig. 2-1 Example of a rating plate

Note

Tools such as the DT Configurator and SINAMICS DCM pro cannot be used

when dimensioning the system.

3 Possible power topologies

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

3 Possible power topologies

As a result of the internal interconnection of the power of the SINAMICS DCM, the power

unit topology "6-conductor connection with load in a star connection" is possible. Other

interconnections are possible when using the power unit of a three-phase power controller.

3.1 Topology 1: 6-conductor connection with load in a star

connection

Preconditions:

• The load must be configured for a star connection.

• All 6 load connections must be brought out.

• A symmetrical load is operated in a star connection.

• An isolating measuring amplifier is required to sense the synchronizing voltage.

The following devices can be recommended:

Varitrans P42000 D3 from the Knick company or

DVL1000 from the LEM company

• A clockwise phase sequence must be connected at the infeed.

• The line supply must be symmetrical.

Fig. 3-1 Power unit topology 1

XP1:5N1

XP1:5W1

XP1:5U1

X177:29 30

CUD AI 2

Power Interface

1D1

1C1

1W1

1V1

1U1

   

or 24V= with option L05

Load

Isolating measuring

amplifier

Cable

protection fuses V1 V3 V5

V4 V6 V2

Power unit

DCM

Electronics

supply

Notice:

Ensure a clockwise

rotating field

3 Possible power topologies

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

The following block diagram shows a different depiction of the DCM power unit, and clearly

shows the circuit as three-phase AC power controller.

Fig. 3-2 Block diagram

1V1

1U1

1W1

V1V4

1C1

1D1

Load

DCM

Cable protection

fuse

Cable protection

fuse Cable

protection

fuse

The following power unit topologies generally used for three-phase AC power controllers are

not possible:

• 4-conductor connection (star connection with the neutral point brought out)

• 6-conductor connection (open delta connection)

• Economy circuit connection with load in a star connection

• Economy circuit connection with load in a delta connection

Conductor cross-sections and series fuses

The conductor cross-sections must be dimensioned for the rated current of the heating

elements, taking into account the interconnection; this also dimensions the series fuses.

Semiconductor fuses are not required as series fuses; slow-acting cable protection fuses can

be used. The precondition is that the three-phase AC power controller is dimensioned for the

maximum load current that occurs.

Note

In some fault situations, for example, for ground faults in the power unit in

conjunction with a TN line system, it is possible that the series fuses do not rupture.

To protect persons, additional protection in the form of an RCD must be provided.

If the three-phase AC power controller is underdimensioned with respect to the load,

semiconductor fuses must be provided (for the assignment, see DCM Operating Instructions,

Chapter 6.7.2).

When using an external power unit of the three-phase AC power controller in combination

with a DCM Control Module, the fuses specified by the power unit manufacturer must be

used.

3 Possible power topologies

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

3.2 Topology 2: Using an external power unit for the three-phase

AC power controller and an DCM Control Module

If you are already using a three-phase AC power controller power unit, then you can

implement a heating application using a DCM Control Module. This can be helpful when

retrofitting old systems, where the existing power unit is used.

The following topologies generally used for three-phase AC power controllers are possible:

• 4-conductor connection (star connection with the neutral point brought out)

• 3-conductor connection with load in a star connection

• 3-conductor connection with load in a delta connection

• 6-conductor connection (open delta connection)

• Economy circuit connection with load in a star connection

• Economy circuit connection with load in a delta connection

Fig. 3-3 Power unit topology 2: 4-conductor connection (star connection with the neutral point brought

out)

Load

AK5AK3

AK1

AK2 AK4 AK6

External

power unit

XU2 XV2 XW2

Voltage sensing

V1 V4 V3 V6 V5 V2

Control

Module

* Connection points

XU/V/W1…6 of the

voltage sensing

depend on the line

voltage.

3 Possible power topologies

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

Fig. 3-4 Power unit topology 2: 3-conductor connection with load in a star connection

AK5AK3

AK1

AK2 AK4AK6 External

power unit

Load

V1 V4 V3 V6 V5 V2

XU2 XV2 XW2

Voltage sensing

Control

Module

* Connection points

XU/V/W1…6 of the

voltage sensing

depend on the line

voltage.

Fig. 3-5 Power unit topology 2: 3-conductor connection with load in a delta connection

Load

AK5AK3

AK1

AK2 AK4 AK6

External

power unit

V1 V4 V3 V6 V5 V2

XU2 XV2 XW2

Voltage sensing

Control

Module

* Connection points

XU/V/W1…6 of the

voltage sensing

depend on the line

voltage.

3 Possible power topologies

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

Fig. 3-6 Power unit topology 2: 6-conductor connection (open delta connection)

Load

AK5AK3

AK1

AK2 AK4 AK6

External

power unit

V1 V4 V3 V6 V5 V2

XU2 XV2 XW2

Voltage sensing

Control

Module

* Connection points

XU/V/W1…6 of the

voltage sensing

depend on the line

voltage.

3 Possible power topologies

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

Fig. 3-7 Power unit topology 2: Economy circuit connection with load in a star connection

Load

External

power unit

V1 V4 V5 V2

XU2 XV2 XW2

Voltage sensing

Control

Module

* Connection points

XU/V/W1…6 of the

voltage sensing

depend on the line

voltage.

Fig. 3-8 Power unit topology 2: Economy circuit connection with load in a delta connection

Load

External

power unit

V1 V4 V5 V2

XU2 XV2 XW2

Voltage sensing

Control

Module

* Connection points

XU/V/W1…6 of the

voltage sensing

depend on the line

voltage.

4 General settings and commissioning

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

4 General settings and commissioning

You configure the drive using STARTER:

1. In STARTER, you configure the following parameters offline using the Wizard (see the

operating instructions, Chapter 8.4):

Table 4-1

Parameter

Function

Value

p50100 [0]

Rated motor armature current

0.1 A

p50101 [0]

Rated motor armature voltage

10 V

p50102 [0]

Rated motor excitation current

0.1 A

p50114 [0]

Motor thermal time constant

0 s

p50083 [0]

Selection of the speed controller actual

value

Analog tachometer

p2000

Reference speed

> 6 rpm,

< 210000 rpm

p50082

Field power module operating mode

No field

These parameters are relevant for the closed-loop control of the converter; however,

with this application as three-phase AC power controller, they are not required.

However, you must always use plausible values for these parameters. If process data

(voltage, current etc.) are to be displayed, then you must set the corresponding

reference parameters for this data in the 2000 parameter range.

2. After configuring the drive object, set the following parameters using an expert list that

you created yourself:

Table 4-2

Parameter

Function

Value

p51400

Three-phase AC power controller control

mode

> 0

p51404

Line voltage sensing

Analog input scaling

dependent on the measuring

amplifier measuring range

p51405

Three-phase AC power controller

Synchronization voltage selection

p51406

Three-phase AC power controller duty

cycle (setpoint)

Signal source

dependent on the setpoint

source

p50357

Tachometer interruption monitoring

threshold

100%

p50067

Load class

1 (factory setting)

p50075

Power unit I2t monitoring response

0 (factory setting)

p50590

Message set/act val dev 1

signal source for speed setpoint

p50600

Signal source for armature gating unit

input

4 General settings and commissioning

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

Note

Most measuring amplifiers have several measuring ranges; in parameter p51404

you can set the measuring range that the measuring amplifier currently maps.

You select a measuring range that can completely map the line voltage, and

which lies the closest to the peak value of the line voltage.

For example, 10V output voltage for a 600V input voltage

3. Using STARTER, load the parameterization into the DCM.

4. To backup the parameterization, carry out a "RAM to ROM" after the download.

5. Carry out a "Power on reset" to activate analog input AI2.

Note

You do not have to carry out any optimization runs as neither a speed controller

nor a current controller is being used.

5 Open-loop control mode

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

5 Open-loop control mode

When using SINAMICS DCM as three-phase AC power controller with firmware version 1.5

or higher, an appropriate gating unit is available.

The phase angle control mode must be used when using inductive loads, e.g. transformers.

One of 3 different control modes can be selected:

• Phase angle control

• Full-wave control

• Half-wave control

p51400 Control type

0 B6C bridge, this means not used as three-phase AC power controller [factory setting]

1 Three-phase AC power controller with phase angle control

2 Three-phase AC power controller with full-wave control

3 Three-phase AC power controller with half-wave control

p51404 Line voltage sensing, analog input scaling

Here, set which instantaneous value of the line voltage (in V) should be mapped to 10 V at

the analog input.

p51405 Three-phase AC power controller synchronizing voltage selection

0 Internal synchronizing voltage [factory setting]

1 External synchronizing voltage (terminal X177.29/30)

Synchronizing voltage

When using the SINAMICS DCM as three-phase AC power controller, the load is connected

to the three-phase side. This is the reason that the synchronizing voltage must be sensed

using an external voltage transformer (PT) - and fed into the CUD via analog input AI2

(terminal X177.29/30).

The voltage between phases U and V must be sensed. Based on this voltage characteristic,

the DCM derives the line zero crossover points of all 3 phases - where a clockwise phase

sequence is assumed. This means that when interconnecting the power (load, line supply),

users must always ensure the correct phase sequence (clockwise phase sequence).

p51406 Three-phase AC power controller duty cycle signal source

For phase angle control, the following applies:

0% to 100% corresponds to 180° to 0°

For full and half-wave control, the following

applies:

0% to 100% corresponds to 0% to 100%

Duty cycle (= on time/cycle time)

Closed-loop control, signal source for the duty cycle

Both a higher-level control (temperature control) - as well as a subordinate control (I-, I2-, U-,

U2-, R-, P control) must be implemented in the higher-level open-loop control using the

integrated technology controller - or using a DCC chart.

The output of the higher-level closed-loop control must be interconnected to the input for the

duty cycle (p51406).

Closed-loop control, signal source for actual value sensing

The transformer (CT) values r52952[2], r52952[3] and the rms line phase current r52108 are

available to sense the current. All of the other signals (r52114, r52117 and r52126) cannot

be used for heating operation as they are designed for another topology.

If additional signals are required to sense actual values, then external devices must be used.

5 Open-loop control mode

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

5.1 Phase angle control

For phase angle control, current flows through the controlled load during each line voltage

half wave. The current flows from the firing instant up to its natural zero crossover.

For phase angle control, as standard, there is no current limiting. The current amplitude is

exclusively determined by the load and the phase control factor (firing angle). If current

limiting is required, then this can be implemented using a higher-level closed-loop control - or

using a parameterizable limit function block that is internally connected in series. This would

limit the phase control factor (firing angle), and therefore the current to the maximum value

permissible for the power unit. This limit value depends on the load, which means that the

limit value of the limit block must be empirically determined. In the case of an overcurrent

condition, a closed-loop control system would reduce the phase control factor of the three-

phase AC power controller.

Note

The thyristors can be damaged if the maximum load current exceeds the

maximum input current of the power unit.

Fig. 5-1 Current and voltage characteristic when using phase angle control to control a resistive load



Control device

ULoad



U ~

iTh1

U ~

iTh1

iTh2

ULoad



iTh2

The diagrams show the current and/or voltage characteristic of a phase

Table 5-1 Legend

Line voltage

iTh1

Load current through thyristor 1

U Load

Load voltage

iTh2

Load current through thyristor 2

I Load

Load current



Firing angle



Time-dependent phase angle

The angle between the zero crossover of the line voltage and firing the thyristors is called



R can be continuously varied between i = 0° and 0  = 180°.

5 Open-loop control mode

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

Fig. 5-1

fully-controlled, i.e. the line voltage is continuously available at the load. Contrary to this, at

 = 180°, the voltage is available as blocking voltage across the thyristor module during the

complete half wave. At an angle of 45°, the dotted line indicates the voltage characteristic

when the thyristor is in a high ohmic (blocking) state.

Properties

This control mode is suitable for resistive (ohmic), inductive and resistive-inductive loads. In

the first case, the load current and voltage have the same phase relationship, while in the

two other cases, the current lags the voltage.

Benefits

The advantages of phase angle control include the fine energy dosing and short response

time; this means that it can be used for extremely fast control loops. Further, the current can

be limited when using this control mode.

Disadvantages

The disadvantage of this control mode results from the harmonics caused by the steep

edges of the chopped voltage half waves - which result in HF disturbance. Another

disadvantage is the reactive power, that even occurs for resistive (ohmic) loads. For resistive

loads, this is caused entirely by the phase angle control, and is therefore known as control

reactive power.

5.2 Full-wave control

For full-wave control, complete sinusoidal oscillations are switched-in or switched-out. The

mean power is obtained from the ratio between the on-time and off-time.

As a consequence, a low level of radio frequency interference is achieved - along with low

levels of harmonics and a low reactive power.

p51411 Three-phase AC power controller full wave control distribution

1 = block distribution [factory setting]

2 = uniform distribution

Block distribution

All of the full waves that are switched-on are concentrated in a block - the pause as well. The

load temperature is not constant, but fluctuates depending on how high the thermal time

constant of the load is compared to the cycle time.

5 Open-loop control mode

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

Fig. 5-2 Full-wave control with block distribution

The diagram shows the current and/or voltage characteristic of a phase

Uniform distribution

All of the full waves that are switched-on are uniformly distributed over the cycle time.

This control mode is better suited for fast control loops.

Fig. 5-3 Full-wave control with uniform distribution with 66.6% duty cycle

ULoad

The diagram shows the current and/or voltage characteristic of a phase

p51412 Minimum switch-on duration

[1 to 50 line periods, factory setting = 1]

Advantages of full-wave control when compared to phase angle control

• Minimum radio interference as the thyristors for resistive loads are always fired at the

zero crossover of the voltage.

• No harmonics, the load current is purely sinusoidal

• No control reactive power

If only resistive loads are controlled, then the line supply is not inductively loaded. There

is no lagging reactive current.

Load voltage

Line voltage

Firing pulse

Load

5 Open-loop control mode

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

Disadvantage of full-wave control when compared to phase angle control

Voltage fluctuations on the line supply cable (voltage flicker).

If the line supply is too weak (low fault rating), voltage fluctuations can occur on the line

supply cable as a result of load pulsing.

For lighting system connected to the same line supply, this results in unpleasant fluctuations

in the lighting level (flicker).

The associated limit values can be taken from EN 61 000-3-3.

5.3 Half-wave control

For half-wave control, complete sinusoidal half waves are switched-in or switched-out.

This control mode reduces the power fluctuations when compared to full-wave control.

The following attributes apply:

• In every cycle, the same number of positive and negative half waves are always

switched-in or switched-out.

This therefore ensures that no DC components occur, which would significantly load the

line supply or upstream transformers.

• The positive and negative half waves that are switched-on are, as far as possible,

uniformly distributed over the cycle time.

Fig. 5-4 Half-wave control with 25% duty cycle

ULoad

The diagram shows the current and/or voltage characteristic of a phase

5.4 Common functions for full and half-wave control

General

When using inductive loads, e.g. transformers, full and half-wave control modes cannot be

used.

Current limiting cannot be implemented for full and half-wave control. The current amplitude

is only defined by the load, and cannot be influenced or limited by the three-phase AC power

controller. As a consequence, the three-phase AC power controller power unit may not be

underdimensioned with respect to the connected load. For full and half wave control, the

thyristors conduct a certain number of current half waves depending on the firing angle. The

relevant thyristor is damaged by a current half wave with high overcurrent.

Note

The thyristors can be damaged if the maximum load current exceeds the

maximum input current of the power unit.

5 Open-loop control mode

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

Cycle generation

p51410 Three-phase AC power controller cycle time

5 to 5000 line periods, factory setting = 50

Extending the cycle time has the advantage that the setpoint resolution improves, i.e. the

setpoint can be set more finely. The disadvantage is that for longer cycle times and heating

systems with a very low thermal time constant, the temperature fluctuations are greater than

for short cycle times.

p51415 Three-phase AC power controller starting firing angle

Setting the initial firing angle for full and half wave control when used as three-phase AC

power controller.

The firing angle for the first half wave of a contiguous pulse group - this is why it is also

called Start - can be set between 0° el and 90° el.

Fig. 5-5 Full-wave control with chopped first line voltage half wave

Load voltage Line voltage Firing pulse

ULoad

t

Start

The diagram shows the current and/or voltage characteristic of a phase

Chopped last (and last but one) line voltage half wave

The power can be continuously adjusted, even for full-wave control (especially for block

distribution) as the phase is chopped at a half period of the switch-on time.

5 Open-loop control mode

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

Fig. 5-6 Full-wave control with chopped line voltage half wave

Load voltage Line voltage Firing pulse

ULoad



The diagram shows the current and/or voltage characteristic of a phase

p51416 Three-phase AC power controller, full-wave control with chopped line voltage half

waves

0 = no phase angle control - phase not chopped [factory setting]

1 = phase of the last half wave chopped

2 = phase of the last two half waves chopped

6 Soft start function

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

6 Soft start function

Application

The soft start function means that when first switched on a high power is not applied to the

load. As a consequence, you have additional operational reliability for transformer loads.

This soft start function is used when controlling transformer loads and resistive loads, whose

resistance significantly changes with the temperature

(e.g. Rcold : Rwarm 

• The power is continually increased and applied to the load from 0 up to the

corresponding duty cycle.

• The transformer is pre-magnetized and can then be operated with its full power rating.

• The rush effect (inrush) is suppressed.

Principle

Phase angle controlled operation is always started each time that the system switched on.

A,softstart), and is shifted towards the front along an

adjustable ramp.

"Phase angle control" control mode

The soft stop ramp is exited if the firing angle matching the specified duty cycle is reached.

"Full-wave control" and "Half-wave control" control modes

E,Softstart is reached. The system then

automatically switches over to full-wave control or half-wave control.

E,Softstart = 0°. However, it can also make sense to already exit the soft start ramp

E,Softstart). This is because for a resistive (ohmic) load, the maximum

peak current is reached.

For the subsequent full-wave control or half-wave control for a transformer load, by setting a

Start between 0° and 90°, the first half wave of each pulse package can be

chopped.

Fig. 6-1 Soft start for full-wave control

Load voltage Line voltage Firing pulse

ULoad



The diagram shows the current and/or voltage characteristic of a phase

If the off duration is longer than a time that can be parameterized, when it is switched-on

again, three-phase AC power controller restarts with a soft start ramp.

6 Soft start function

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

p51420 Three-phase AC power controller, duration of the soft start ramp [0 to 500 line periods,

factory setting = 0]

The "Soft start ramp duration" is defined as:

Number of line periods in which the firing angle would be shifted forward from 180° to 0°.

This time defines the change of the firing angle per line cycle.

The actual duration of the soft start can be shorter, e.g. if a final control angle not equal to 0°

is set.

Note

For full and half-wave control, the soft start ramp duration should be set shorter

than "2 *cycle time* max. duty cycle", to prevent any overload condition during

the soft start.

p51421 Three-phase AC power controller soft start final firing angle (αE,Softstart) [0° to 180°,

factory setting = 0°]

p51422 AC power controller max switch off duration w/out a new soft start [0 to 100s,

factory setting = 0]

7 Line load equalization

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

7 Line load equalization

For partial load operation in the full-wave or half-wave control mode, unnecessary load

peaks can occur if several three-phase AC power controllers are involved and the individual

devices are not switched in a coordinated fashion.

Using a higher-level control system, the loads within a group of three-phase AC power

controllers can be equalized.

Note

The line load equalization control is not implemented in SINAMICS DCM,

instead, the function must be realized in a higher-level control system.

Example

Controller 1 and controller 2 have a duty cycle = 50%. Cycle period is 1 s.

Without any coordination between controller 1 and controller 2, then it is possible that both

simultaneously conduct current for ½ second - and then both simultaneously do not conduct

current for ½ second.

With load equalization control, controller 1 conducts current for ½ second and controller 2

does not conduct current - and vice versa.

Note

• A line load equalization control is only effective if the individual three-phase

AC power controllers have duty cycles that are less than 100%.

• Line load equalization control is only possible in the full-wave and half-wave

control modes. For phase angle control, there is no periodic switching

on/switching off that can be coordinated over several controllers. It results in

a uniform current flow for all three-phase AC power controllers.

SINAMICS DCM offers functions that facilitate and support higher-level line load equalization

control.

p51410 Cycle time

The cycle time must be set the same for all devices that participate in line equalization,

otherwise the line equalization control function does not function. For phase angle control,

setting the cycle time has no relevance.

r51430 Cycle output not shifted

This output supplies a type of staircase signal (0% to 100%), which specifies how many line

periods of the clock cycle periods have already taken place.

Shifting the clock cycle by the signal specified in p51437 is not taken into account.

r51431 Actual cycle output

The same as r51430, however, the shift by the signal specified in p51437 is taken into

account.

p51435 Cycle generation type

1 = internal cycle [factory setting]

2 = external cycle (signal source specified in p51436)

7 Line load equalization

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

p51436 Selection of the signal source for the external cycle [factory setting = 0]

p51437 Selection of the signal source for the cycle shift [factory setting = 0]

A higher-level control system can specify by how many percent (0% to 100%) the clock

cycles of individual three-phase AC power controllers should be shifted.

7.1 Implementation example

A circuit suggestion is shown in the following example.

It shows the BICO connections that are required for the line load equalization control of a

group of three-phase AC power controllers based on SINAMICS DCM.

• SINAMICS DCM 1 outputs its unshifted internal cycle (e.g. via the parallel interface) to

all other DCMs. This means that all DCMs run in synchronism.

• The "subordinate control", running in a higher-level control system, specifies the duty

cycle to each individual DCM (e.g. via PROFINET).

• The line load equalization control specifies a cycle shift for each individual DCM (e.g. via

PROFINET). This allows the line load to be kept as uniform as possible.

7 Line load equalization

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

Fig. 7-1 Example of line load equalization control

CCI: Ext cycle s_s

r52700[0]

p51436 r52700[0]

CO: PZD1

p51435 = 2

CI: Cyc intercon s_s

r2050[6]

p51437

r2050[6]

CO: PZD7 DCM 3

CI: Set s_s

r2050[5]

p51406

r2050[5]

CO: PZD6

CCI: Ext cycle s_s

r52700[0]

p51436 r52700[0]

CO: PZD1

p51435 = 2

CI: Cyc intercon s_s

r2050[4]

p51437

r2050[4]

CO: PZD5 DCM 2

CI: Set s_s

r2050[3]

p51406

r2050[3]

CO: PZD4

p51435 = 1

DCM 1

CI: Set s_s

r2050[1]

p51406

r2050[1]

CO: PZD2

r51430

CO: int. cycle

SIMATIC

- Higher-level closed-loop

control

- Lower-level closed-loop

control

(specifies the duty cycle)

- Line load equalization control

(specifies the cycle shift)

Profinet

Parallel

interface

Duty cycle

Cycle shift 2

Cycle shift 3

Ext. cycle

CI: P2P PZD1

r51430

p51814[0]

CI: Cyc intercon s_s

r2050[2]

p51437

r2050[2]

CO: PZD3

Cycle shift 1

r51430

CO: int. cycle

CI: PZD2

r51430

p2051[0]

8 Parameter overview

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

8 Parameter overview

Table 8-1

Parameter

Function

General functions for three-phase AC power controllers

p51400

Open-loop control mode

0: B6C bridge not used as three-phase AC power controller [factory setting]

1: Three-phase AC power controller with phase angle control

2: Three-phase AC power controller with full-wave control

3: Three-phase AC power controller with half-wave control

p51404

Scaling of the synchronizing voltage

Here, set which peak value of the line voltage (in V) should be mapped to 10 V at

the analog input.

p51405

Selects the synchronizing voltage

0: Internal synchronizing voltage [factory setting]

1: External synchronizing voltage (terminal X177.29/30)

p51406

Signal source for the duty cycle

Functions for full and half-wave control

p51410

Cycle time [5 to 5000 line periods, factory setting = 50]

p51411

Full-wave distribution type

1: Block distribution [factory setting]

2: Uniform distribution

Soft start function

p51420

Soft start ramp duration [0 to 500 line periods, factory setting = 0]

p51421

Final firing angle [0° to 180°, factory setting = 0°]

p51422

Max. off duration without a new soft start ramp [0 to 100s, factory setting = 0]

Functions for line load equalization control

r51430

Cycle output not shifted

This output supplies a type of staircase signal (0% to 100%), which specifies how

many line periods of the clock cycle periods have already taken place. Shifting the

cycle by the signal specified using p51437 is not taken into account.

r51431

Actual cycle output

The same as r51430, the shift by the signal specified using p51437 is taken into

account, however.

p51435

Cycle generation type

1: Internal cycle [factory setting]

2: External cycle (signal source specified in p51436)

p51436

Selection of the signal source for the external cycle [factory setting = 0]

p51437

Selection of the signal source for the cycle shift [factory setting = 0]

A higher-level control system can specify by how many percent (0% to 100%) the

clock cycles of individual three-phase AC power controllers should be shifted.

Factory setting

9 Appendix

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

9 Appendix

Table 9-1 Type-related line voltages and input currents

Order number

Line voltage

Line current at full load

6RA8013-6DV62-0AA0

3AC 400V

3AC 13A

6RA8018-6DV62-0AA0

3AC 400V

3AC 25A

6RA8025-6DS22-0AA0

3AC 400V

3AC 50A

6RA8028-6DS22-0AA0

3AC 400V

3AC 75A

6RA8031-6DS22-0AA0

3AC 400V

3AC 104A

6RA8075-6DS22-0AA0

3AC 400V

3AC 174A

6RA8078-6DS22-0AA0

3AC 400V

3AC 232A

6RA8081-6DS22-0AA0

3AC 400V

3AC 332A

6RA8085-6DS22-0AA0

3AC 400V

3AC 498A

6RA8087-6DS22-0AA0

3AC 400V

3AC 706A

6RA8091-6DS22-0AA0

3AC 400V

3AC 996A

6RA8093-4DS22-0AA0

3AC 400V

3AC 1328A

6RA8095-4DS22-0AA0

3AC 400V

3AC 1660A

6RA8098-4DS22-0AA0

3AC 400V

3AC 2490A

6RA8025-6FS22-0AA0

3AC 480V

3AC 50A

6RA8028-6FS22-0AA0

3AC 480V

3AC 75A

6RA8031-6FS22-0AA0

3AC 480V

3AC 104A

6RA8075-6FS22-0AA0

3AC 480V

3AC 174A

6RA8078-6FS22-0AA0

3AC 480V

3AC 232A

6RA8082-6FS22-0AA0

3AC 480V

3AC 374A

6RA8085-6FS22-0AA0

3AC 480V

3AC 498A

6RA8087-6FS22-0AA0

3AC 480V

3AC 706A

6RA8091-6FS22-0AA0

3AC 480V

3AC 996A

6RA8025-6GS22-0AA0

3AC 575V

3AC 50A

6RA8031-6GS22-0AA0

3AC 575V

3AC 104A

6RA8075-6GS22-0AA0

3AC 575V

3AC 174A

6RA8081-6GS22-0AA0

3AC 575V

3AC 332A

6RA8085-6GS22-0AA0

3AC 575V

3AC 498A

6RA8087-6GS22-0AA0

3AC 575V

3AC 664A

6RA8090-6GS22-0AA0

3AC 575V

3AC 913A

6RA8093-4GS22-0AA0

3AC 575V

3AC 1328A

6RA8095-4GS22-0AA0

3AC 575V

3AC 1660A

6RA8096-4GS22-0AA0

3AC 575V

3AC 1826A

6RA8097-4GS22-0AA0

3AC 575V

3AC 2324A

6RA8086-6KS22-0AA0

3AC 690V

3AC 598A

6RA8090-6KS22-0AA0

3AC 690V

3AC 830A

6RA8093-4KS22-0AA0

3AC 690V

3AC 1245A

6RA8095-4KS22-0AA0

3AC 690V

3AC 1660A

6RA8097-4KS22-0AA0

3AC 690V

3AC 2158A

6RA8097-4KS22-0AA0

3AC 690V

3AC 2158A

9 Appendix

SINAMICS DCM as three-phase AC power controller for heating applications

Entry ID: 109763610, V1.1, 08/2018

Order number

Line voltage

Line current at full load

6RA8088-6LS22-0AA0

3AC 830V

3AC 789A

6RA8093-4LS22-0AA0

3AC 830V

3AC 1245A

6RA8095-4LS22-0AA0

3AC 830V

3AC 1577A

6RA8096-4MS22-0AA0

3AC 950V

3AC 1826A

Note

Devices can be adapted to specifically address customer requirements based on a

comprehensive range of options.