ServoOne TL

Three-level inverter for high-speed drives

The drive controllers for maximum output frequencies

In high-speed drives, e.g. for turbo machines, the maximum possible output frequencies of conventional drive controllers are often not sufficient. KEBA has been offering special three-point inverter output stages for these applications for many decades.

Your advantages at a glance:

Output frequencies up to 2,300 Hz with high switching frequencies
Liquid cooling
No sine filter required
Sensorless operation

Three-level inverter technology

Three-level output stage technology (TL) achieves almost sinusoidal motor currents (blue) by means of additional voltage potentials (red) and higher switching frequencies. Additional sinusoidal filters are not required. The resulting low rotor heating is essential for many applications.

System integration

The ServoOne TL drive controllers offer a high degree of flexibility for integration into your system concept.

Many bus systems: EtherCAT, Profinet, Modbus etc.
Integrated 24 V power supply unit
Design with small cable cross-sections possible
Integrated mains monitoring
No external sine filter required

Active input stage

Legal requirements and electrical infrastructures – such as transformers, cables and switchgear – increasingly demand a reduction in the grid load caused by electrical loads. The ServoOne TL 50kW with its active input stage (AIS) meets these requirements with a THDi ≤ 5%.
A higher DC link voltage compared to devices with passive output stages also allows either a more compact motor design or a higher output power with a comparable mains voltage.

Fields of application

Use in process technology, mechanical engineering and research
Based on more than 50 years of experience in high-speed applications
Used in over 100,000 high-speed solutions worldwide
Used in critical infrastructures, 24/7 processes and high-precision machines

More about turbo systems

Technical data

Performance data	ServoOne TL 50 kW	ServoOne TL 300 kW
Mains voltage	3 x 400-480 V AC	3 x 400-480 V AC
Mains input	active, regenerative	passive
Rated motor current	85 A	610 A
Rotary field frequency	2,300 Hz	2,000 Hz
Input current at 3 x 400 V AC	83 A	620 A
Power amplifier technology	Three-Level	Three-Level
Output stage switching frequency	48 kHz	16 kHz
Speed control	sensorless	sensorless
Cooling concept	liquid-cooled	liquid-cooled