Highly flexible drive solutions and flexible power demands

As the industry leader in metal technologies with numerous successful installations and decades of experience, Siemens VAI offers new drive systems customized to meet the needs of your plant, in addition to comprehensive modernization packages.

Rolling mills depend on their drive technology for success. The main and auxiliary mill drives in combination with the mill stand main motors are crucial. Mill drives and motor technology must therefore be high-dynamic, with a highly accurate response and stable control system. Furthermore, drive technology should feature high overload capability, smooth running, maximum availability, service friendliness, and seamless integration into higher-level automation systems. As the market leader with numerous reference installations and decades of experience, Siemens VAI has accumulated extensive expertise in right drive systems.

The frequency converter family Sinamics provides highly flexible drive solutions and scalable power demand required of modern drive systems. Functions such as drive control, operator control, diagnostics, and communication with higher level controllers are standardized across the entire Sinamics family, reducing resources necessary for training and maintenance.

Motor

100 years of Siemens heavy-duty rolling motors

With our DYNAMOWORKS motor factory just celebrating its 100th year of production motors benefit from that experience combined with the latest manufacturing techniques and design. Features include a fully-impregnated rotor, low torque ripple, a single-piece stator, and non-salient pole rotors.

Medium-voltage source converter

Sinamics SM150 medium-voltage source converter drive

The Sinamics SM150 medium-voltage drive is used for sophisticated single- and multi-motor drive applications, combining high dynamic performance with maximum control precision. Supporting a drive output range extending from approximately 2,500 to 30,000 kVA, the Sinamics SM150 system is based on water-cooled, three-level converters designed around Integrated Gate Commutated Thyristors (IGCT) with a voltage source link and Active Front End (AFE).

Low-voltage converter

Sinamics S120 low-voltage VVVF drives

The modular Sinamics S120 drive system is suited for rolling and strip transportation applications in the power range up to approximately 2,000 kW. The Sinamics S120 system is based on two-level voltage source converter topology with IGBT transistors on the motor side and separate rectifiers on the line side. Very often the motor-side inverters are connected to a common DC bus fed by a common infeed.

Cycloconverter

Sinamics SL150 Cycloconverter drive

The cycloconverter transforms the line-side AC system with constant frequency and voltage into a system with variable frequency and voltage, and features outstanding efficiency while providing sinusoidal output currents across the entire working range. For modernization of existing cycloconverters, the SL150 systems offers revamp kits. Existing power cores and thyristors can be maintained.

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Siemens VAI Metals Technologies

Motors and Drives