SINAMICS SL150

The cycloconverter for slow-speed synchronous and induction motors with a high torque

General description

SINAMICS SL150 cycloconverters with thyristor stacks are the optimum choice when it comes to continuously controlling the speed of high‑rating induction and synchronous motors with a high torque and low stator frequencies. They are implemented as three‑phase thyristor bridges in a 6 or 12‑pulse connection. They set themselves apart as a result of their simple design that utilizes a relatively low number of power semiconductors. As a consequence, the SINAMICS SL150 has a high efficiency and high degree of reliability.
Without any additional costs, the inherent circuit principle of the cycloconverter makes it suitable for four‑quadrant operation – i. e. driving and braking in both directions. The maximum output frequency is typically between 40 and 44 % of the line frequency. Open‑loop and closed-loop control and thyristor monitoring for the complete drive are implemented using components from the SINAMICS system. The thyristors are controlled and monitored opto-electronically via fiber‑optic cables. The heat from the power circuit is dissipated using the cabinet fans.

Features

High efficiency

With SINAMICS SL150, low switching losses and the low loss thyristor technology ensure an extremely high efficiency (99 %). As a consequence, lower demands are placed on the cooling system. At the same time, less space is required for installation.

Used worldwide

The technology employed in SINAMICS SL150 has been successfully used for more than 35 years now. More than 700 units of the previous SIMOVERT D series were supplied in different versions – wherever slow speed applications demand a high power rating and the highest torque.

Top marks for ruggedness and availability

There are some excellent reasons why SINAMICS SL150 is extremely reliable and sets standards when it comes to ruggedness:

• Few components for any particular power rating: 9/18 MVA with 36 thyristors
• Generous and rugged design
• Fast fault diagnostics using an extensive, detailed message system: Trace memory for 14 signals – output at analog outputs
• Fault display at the operator panel
• Feedback diagnostics of the individual thyristors in the power unit