Frequency converters from Sieb & Meyer with new 185 kW power class

A step that can make a real difference for many machine builders: Sieb & Meyer is launching a new performance class of its SD2M and SD4M frequency converter series. The new air-cooled variants for the power range between 150 and 300 kW specifically close a gap in the existing product range – with a clear focus on applications in turbo machine technology.

With its SD2M and SD4M frequency converter series, Sieb & Meyer already offers a finely graded range of power ratings between 70 and 490 kW. Now, the high-speed specialists from Lüneburg are expanding their portfolio with new air-cooled device variants in the 185 kW power class.

Until now, the air-cooled devices in the SD2M and SD4M series covered a current range from 310 A@8 kHz to 480 A@8 kHz. With the new 350 A@8 kHz variant, an additional model has now been added to the range, closing the gap on the current side. What looks like a minor addition on paper has great practical benefits for many plant engineers. Especially when it comes to optimally matching performance and installation space.

“We listened to our customers,” says Torsten Blankenburg, CTO at Sieb & Meyer. "The range between 150 and 300 kW is crucial for many applications. With the new power class, we are creating more flexibility in engineering while reducing unnecessary oversizing." Previously, the air-cooled units in the SD2M and SD4M series covered a current range from 310 A@8 kHz to 480 A@8 kHz. With the new 350 A@8 kHz variant, an additional model is now available, closing the gap on the current side. What may seem like a minor addition on paper has major practical benefits for many plant engineers. Especially when it comes to optimally matching performance and installation space.

High overall efficiency thanks to three-level technology

High overall efficiency thanks to three-level technologyThe innovative three-level technology of the SD2M and SD4M series, combined with device-dependent switching frequencies of up to 32 kHz, ensures excellent power quality, resulting in low losses in the motor and a corresponding increase in overall efficiency. This also prevents excessive rotor heating without the need for expensive sine filters or motor chokes. In addition, the three-level technology reduces the strain on the motor insulation.