General information Siemens

Область применения

DC drive technology: Dynamic, rugged and cost effective

Depending on the particular application, DC drives are often the most favorably-priced drive solution with many advantages when it comes to reliability, operator friendliness and operating behavior. Just as before, there are some compelling technical and economic reasons for still using DC drives in many industrial areas:

• Favorably-priced four-quadrant operation
• Continuous operation at low speeds
• Full torque even at low speeds
• Low torque ripple even at low speeds
• High starting torque
• Wide speed control range with constant power
• Low space requirement and low weight
• Reliability
• Low amount of heat dissipated in the switchgear room and therefore a very high efficiency

Main applications for DC drives include:

• Rolling mill drives
• Wire-drawing machines
• Extruders and kneaders
• Presses
• Elevators and cranes
• Cableways and lifts
• Mine hoists
• Test stand drives

Обзор

The standard series of SINAMICS DC MASTER chassis units encompasses an extensive range of currents and voltages.

A drive converter cabinet is available for each of the chassis units. The options of the chassis units, the existing cabinets and the SINAMICS cabinet systems have been merged.

This means that SINAMICS DC MASTER Cabinet can be optimally adapted to the requirements of the plant or system. The compact design, the EMC zone concept and the good accessibility of the individual components allows new systems to be quickly and simply built and existing plants or systems to be retrofitted with the shortest downtimes.

The drive cabinets can be directly connected to three-phase line supplies with rated voltages up to 950 V 3 AC – and in the basic version, cover a power range extending from 6 up to 2 500 kW. Increased power ratings using parallel connections as well as solutions for medium-voltage applications are available on request.

SINAMICS DC MASTER Cabinet drive cabinets are available in the following sizes (referred to the basic version).

¹⁾ Height including fan.

²⁾ Assignment to the rated DC current, see the technical data.

Detailed dimension drawings in the PDF format and DXF formats are available in the Internet at http://www.siemens.com/sinamics-dcm

Дизайн

SINAMICS DC MASTER Cabinet, size CC (shown with options)

The basic version of the standard cabinet system is ready to connect up and, based on the TS8 cabinet system from Rittal, offers standard components such as:

• Line connection with input terminals
• Main switch
• Commutating reactor
• Fuses
• Line contactor or circuit breaker
• Control voltage transformer
• Cable and motor protection circuit breaker for auxiliary equipment
• AOP30 Advanced Operator Panel
• PROFIBUS connection

All of the auxiliary and supplementary components are supplied from the auxiliary supply (400 V 3 AC) as well as the field circuit and feeders for the DC motor fan.

For straightforward operation and diagnostics, the AOP30 is mounted in the cabinet door, and the detailed documentation, including circuit manual with circuit diagram and terminal diagram, provide a well-founded technical overview of the drive cabinet. In addition to the basic version, a wide range of options allow the drive cabinet to be optimally adapted to the plant or system requirements.

Note:

All of the connections are established at the lower part of the cabinet.

Line connection

Line connections for the armature supply (3 AC) and auxiliary power supply (400 V 3 AC) including the field supply.
Optionally, also other line voltages or integrated auxiliary power supply.

Main switch for the armature circuit and auxiliary power supply

For drive cabinets from 15 up to 850 A rated DC current, the armature circuit is switched in using a manually actuated fuse load disconnector and a main contactor; from 950 A the drive cabinets are equipped with an electrically operated circuit breaker.

Cable and semiconductor protection

SITOR semiconductor fuses, type 3NE are used.

Line contactor for armature and field

For drive cabinets with a rated current from 950 A and higher, implemented as circuit breaker. The commutating reactor in the armature and field circuit is designed for the rated current of the unit. If the rated motor current is significantly lower then the rated current of the unit, then on request, a cost-optimized solution can be offered with adapted current carrying capability of the power components.

DC converter including field module

A detailed description of the DC converter can be found in the operating instructions and Catalog D 23.1.

Motor connections

In addition to the motor connections for the field and armature, the basic version also includes the power supply for the motor fan. The setting range of the motor protection circuit breaker must be specified when placing the order.

For drive cabinets for four-quadrant operation up to 850 A, the armature circuit has a DC fuse.

A detailed diagram showing the electrically relevant individual components is provided in the Section, Block diagrams.

Degrees of protection of drive cabinets

Standard EN 60529 addresses the protection of electrical equipment using housings, covers or equivalent, and includes:

• Protection of persons against accidental contact with live or moving parts within the housing and protection of the equipment against the ingress of solid foreign matter (touch protection and protection against ingress of solid foreign bodies)
• Protection of the equipment against the ingress of water (water protection)
• Abbreviations for the internationally agreed degrees of protection

The degrees of protection are specified by abbreviations, which comprise the code letters IP and two digits.

Особенности

• Plant and system availability are increased by being able to quickly and simply replace components:
  These components have been designed so that they can be quickly and simply replaced. The spare parts that are available can be viewed online at any time and assigned to the serial number of the cabinet.
• Easy commissioning and parameterization:
  Menu-prompted at the AOP30 Advanced Operator Panel with graphics-capable LCD display and plain text display, or PC-supported using the "STARTER" commissioning tool of the SINAMICS family – see "Tools and engineering".
• Can be simply integrated into automation solutions:
  For instance using standard PROFIBUS communication interface and various analog and digital interfaces as well as PROFINET.
• Immediately ready to connect up:
  All of the terminals are easy to access and the documentation supplied with the equipment contains detailed circuit diagrams and terminal diagrams, which facilitate fast and simple installation and commissioning.
• High degree of adaptability and optimum support for application-specific versions:
  For instance, 12-pulse applications, redundant operation or increased power ratings.

Дальнейшая информация

Siemens DC motors

Siemens DC motors have proven themselves for decades in day to day use. In conjunction with the SINAMICS DC MASTER converters, they always form the ideal team – wherever favorably-priced drive technology and the highest degree of availability are demanded.

These motors can also be used where space is restricted thanks to their compact and modular design.

Further, an extensive range of equipment and devices for mounting on the motor is available. A wide range of monitoring and diagnostic options facilitate reliable and disturbance-free operation.

Detailed specifications regarding quality assurance and improvement are integrated in all of the various operations and processes - from motor development through to production and service. Quality management coordinates the interaction between all of the company processes to ensure error-free and smooth processes.

It goes without saying that our stringent quality requirements also apply to our suppliers. All of the suppliers must seamlessly integrate themselves into our quality management system.

The result: Only fault-free and high quality materials are released for use in our motor production.

Customer benefits:

• High power density with small motor dimensions
• High degree of operational reliability and availability through a wide range of diagnostic features, in conjunction with the SINAMICS DC MASTER converter
• High thermal reserves for continuous and overload conditions as a result of the DURIGNIT 2000^® insulation system
• Low losses through a very good efficiency
• Long brush lifetimes through an optimized current commutation system

Typical applications:

• Lift and cableway drives
• Rolling mill drives and winders
• Hoisting and travel gear drives for cranes
• Extruders in the plastics industry
• Drives for printing machines
• Drives for paper machines

Additional information on Siemens DC motors is available on the Internet at:
http://www.siemens.com/dc-motor